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2–40 hp Portable Chillers
Part Number: A0554832
Bulletin Number: SC2-610C.8
Effective: 11/01/03
Write Down Your Serial Numbers Here For Future Reference:
_________________________
_________________________
_________________________
_________________________
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We are committed to a continuing program of product improvement.
Specifications, appearance, and dimensions described in this manual are subject to change without notice.
DCN No. ____________
© Copyright 2004
All rights reserved.
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Table of Contents
CHAPTER 1: SAFETY .................................................................6
1-1
How to Use This Manual .............................................................................................6
Safety Symbols Used in this Manual.....................................................................6
Warnings and Precautions ..........................................................................................7
Responsibility ..............................................................................................................7
1-2
1-3
CHAPTER 2: FUNCTIONAL DESCRIPTION...............................8
2-1
2-2
Models Covered in This Manual..................................................................................8
General Description.....................................................................................................9
Chilled Water Circuit..............................................................................................9
Refrigeration Circuit...............................................................................................9
Standard Features.....................................................................................................10
Mechanical Features...........................................................................................10
Electrical Features...............................................................................................11
Refrigeration Features.........................................................................................11
Controller Features..............................................................................................11
Other Features ....................................................................................................11
Safety Devices and Interlocks...................................................................................12
High/Low Thermostat Control..............................................................................12
Crankcase Heater ...............................................................................................12
High Pressure Cutout..........................................................................................12
Low Pressure Cutout...........................................................................................13
Oil Pressure Safety Switch..................................................................................13
Fan Cycling Switch..............................................................................................13
Pressure Switch ..................................................................................................13
Flow Switch .........................................................................................................13
Remote Start/Stop Interlock ................................................................................13
Optional Features......................................................................................................14
2-3
2-4
2-5
CHAPTER 3: INSTALLATION ...................................................17
3-1
3-2
3-3
3-4
3-5
3-6
3-7
Uncrating...................................................................................................................17
Electrical Connections...............................................................................................17
Process Water Connections......................................................................................18
Bypass Valve Considerations....................................................................................18
Galvanic Corrosion Considerations...........................................................................18
Water Treatment Considerations ..............................................................................18
Condenser Considerations........................................................................................19
Water-Cooled Chiller Condensers.......................................................................19
Air-Cooled Chiller Condensers............................................................................19
Remote Air-Cooled Chiller Condensers ..............................................................20
Checking Motor Direction..........................................................................................24
Three-Phase Compressors .................................................................................24
Water Pumps.......................................................................................................24
Condenser Fan....................................................................................................24
Water Reservoir ........................................................................................................25
3-8
3-9
3-10 Automatic Water Make-Up Option.............................................................................27
2-40 HP Portable Chillers
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3-11 Initial Start-Up............................................................................................................28
CHAPTER 4: OPERATION ........................................................29
4-1
Panel Buttons, Indicator Lights, and Switches ..........................................................29
Microprocessor Controllers .................................................................................29
Graphic Panel......................................................................................................32
Start-up......................................................................................................................35
Setting the Process Water Temperatures .................................................................35
Auto-Tuning...............................................................................................................35
Optional Communications .........................................................................................35
Programming the Electronic High/Low Thermostat...................................................36
4-2
4-3
4-4
4-5
4-6
CHAPTER 5: MAINTENANCE...................................................38
5-1
5-2
5-3
Lubrication.................................................................................................................38
Filter Cleaning ...........................................................................................................38
Maintaining the Condenser .......................................................................................39
Air- and Remote Air-Cooled Chillers ...................................................................39
Water-Cooled Chillers .........................................................................................39
Maintaining the Evaporator .......................................................................................39
Evaporator Process Piping Y-Strainer.......................................................................39
Preventative Maintenance Service............................................................................40
5-4
5-5
5-6
CHAPTER 6: TROUBLESHOOTING.........................................41
CHAPTER 7: APPENDIX ...........................................................43
7-1
7-2
Warranty....................................................................................................................43
Technical Assistance.................................................................................................44
Parts Department ................................................................................................44
Service Department.............................................................................................44
Sales Department................................................................................................44
Contract Department...........................................................................................44
Drawings and Specifications .....................................................................................45
2 hp and 3 1/2 hp Air-Cooled Portable Chillers...................................................45
5 hp and 7.5 hp Air-Cooled Portable Chillers......................................................46
10 hp and 15 hp Air-Cooled Portable Chillers.....................................................47
20 hp, 25 hp, and 30 hp Air-Cooled Portable Chillers.........................................48
2 hp and 3.5 hp Water-Cooled Portable Chillers.................................................49
5 hp and 7.5 hp Water-Cooled Portable Chillers.................................................50
10 hp and 15 hp Water-Cooled Portable Chillers................................................51
20 hp, 25 hp, and 30 hp Water-Cooled Portable Chillers....................................52
35 hp and 40 hp Water-Cooled Portable Chillers................................................53
5 hp and 7.5 hp Remote Air-Cooled Portable Chillers.........................................54
10 hp and 15 hp Remote Air-Cooled Portable Chillers........................................55
20 hp through 40 hp Remote Air-Cooled Portable Chillers .................................56
Remote Condenser Assembly Models ................................................................57
Pump Curves, Flow, and Pressure Considerations...................................................58
60 Hertz Pump Curves........................................................................................58
50 Hertz Pump Curves........................................................................................59
Water Pressure Drop Tables...............................................................................60
7-3
7-4
2-40 HP Portable Chillers
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Flow and Pressure Considerations .....................................................................61
Recirculation Pump Specifications......................................................................61
Remote Air-Cooled Chiller Configurations ................................................................62
Typical Ductwork for Air-Cooled Chillers...................................................................63
Piping Diagrams........................................................................................................64
Central and Gravity Return Piping with Standpipe Diagram................................64
Typical Piping Schematic, 2 and 3 1/2 hp Models...............................................65
Typical Piping Schematic, 5 hp through 40 hp, One-Pump Models ....................66
Typical Piping Schematic, 5 hp through 40 hp, Two-Pump Models ....................67
Typical Piping Schematic, 5 hp through 40 hp, No-Pump Models ......................68
Typical Piping Schematic, 5 hp through 40 hp, One-Pump Models ....................69
Electrical Schematics ................................................................................................70
Typical Electrical Subpanel .................................................................................70
Typical Electrical Schematic, 2 hp and 3 1/2 hp Models .....................................71
Typical Power Wiring Schematic, 5 hp through 40 hp Models ............................72
Typical Wiring Schematic, 5 hp through 15 hp Models with Pump......................73
Typical Wiring Schematic, 5 hp through 15 hp Models without Pump.................74
Typical Wiring Schematic, 20 hp through 30 hp Models with Pump....................75
Typical Wiring Schematic, 20 hp through 30 hp Models without Pump...............76
Typical Wiring Schematic, 35 hp and 40 hp Models with Pump..........................77
Typical Wiring Schematic, 35 hp and 40 hp Models without Pump.....................78
7-5
7-6
7-7
7-8
2-40 HP Portable Chillers
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Chapter 1: Safety
1-1 How to Use This Manual
Use this manual as a guide and reference for installing, operating, and maintaining your
equipment. The purpose is to assist you in applying efficient, proven techniques that enhance
equipment productivity.
This manual covers only light corrective maintenance. No other maintenance should be
undertaken without first contacting a service engineer.
The Functional Description section outlines models covered, standard features, and optional
features. Additional sections within the manual provide instructions for installation, pre-
operational procedures, operation, preventive maintenance, and corrective maintenance.
The Installation chapter includes required data for receiving, unpacking, inspecting, and setup
of the equipment. We can also provide the assistance of a factory-trained technician to help
train your operator(s) for a nominal charge. This section includes instructions, checks, and
adjustments that should be followed before commencing with operation of the equipment.
These instructions are intended to supplement standard shop procedures performed at shift,
daily, and weekly intervals.
The Operation chapter includes a description of electrical and mechanical controls, in
addition to information for operating the equipment safely and efficiently.
The Maintenance chapter is intended to serve as a source of detailed assembly and
disassembly instructions for those areas of the equipment requiring service. Preventive
maintenance sections are included to ensure that your equipment provides excellent, long
service.
The Troubleshooting chapter serves as a guide for identification of most common problems.
Potential problems are listed, along with possible causes and related solutions.
The Appendix contains technical specifications, drawings, schematics, and parts lists. A
spare parts list with part numbers specific to your machine is provided with your shipping
paperwork package. Refer to this section for a listing of spare parts for purchase. Have your
serial number and model number ready when ordering.
Safety Symbols Used in this Manual
The following safety alert symbols are used to alert you to potential personal injury hazards.
Obey all safety messages that follow these symbols to avoid possible injury or death.
Danger! DANGER indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
Warning! WARNING indicates a potentially hazardous situation or practice which, if not
avoided, could result in death or serious injury.
Caution! CAUTION indicates a potentially hazardous situation or practice which, if not
avoided, may result in minor or moderate injury or in property damage.
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Chapter 1: Safety
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1-2 Warnings and Precautions
Our equipment is designed to provide safe and reliable operation when installed and operated
within design specifications, following national and local safety codes.
To avoid possible personal injury or equipment damage when installing, operating, or
maintaining this equipment, use good judgment and follow these safe practices:
; Follow all SAFETY CODES.
; Wear SAFETY GLASSES and WORK GLOVES.
; Disconnect and/or lock out power before servicing or maintaining the equipment.
; Use care when LOADING, UNLOADING, RIGGING, or MOVING this
equipment.
; Operate this equipment within design specifications.
; OPEN, TAG, and LOCK ALL DISCONNECTS before working on equipment.
You should remove the fuses and carry them with you.
; Make sure the equipment and components are properly GROUNDED before you
switch on power.
; When welding or brazing in or around this equipment, make sure VENTILATION is
ADEQUATE. PROTECT adjacent materials from flame or sparks by shielding with
sheet metal. An approved FIRE EXTINGUISHER should be close at hand and
ready for use if needed.
; Refrigeration systems can develop refrigerant pressures in excess of 500 psi (3,447.5
kPa/ 34.47 bars). DO NOT CUT INTO THE REFRIGERATION SYSTEM. This
must be performed by a qualified service technician only.
; Do not restore power until you remove all tools, test equipment, etc., and the
equipment and related components are fully reassembled.
; Only PROPERLY TRAINED personnel familiar with the information in this
manual should work on this equipment.
We have long recognized the importance of safety and have designed and manufactured our
equipment with operator safety as a prime consideration. We expect you, as a user, to abide
by the foregoing recommendations in order to make operator safety a reality.
1-3 Responsibility
These machines are constructed for maximum operator safety when used under standard
operating conditions and when recommended instructions are followed in the maintenance
and operation of the machine.
All personnel engaged in the use of the machine should become familiar with its operation as
described in this manual.
Proper operation of the machine promotes safety for the operator and all workers in its
vicinity.
Each individual must take responsibility for observing the prescribed safety rules as outlined.
All warning and danger signs must be observed and obeyed. All actual or potential danger
areas must be reported to your immediate supervisor.
2-40 HP Portable Chillers
Chapter 1: Safety
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Chapter 2: Functional Description
2-1 Models Covered in This Manual
This manual provides operation, installation, and maintenance instructions for air- and water-
cooled portable chillers. Model numbers are listed on the serial tag. Make sure you know the
model and serial number of your equipment before contacting the manufacturer for parts or
service.
Our portable chiller models are designated by approximate compressor horsepower (2, 3 1/2,
5, 7 1/2, 10, etc) and the cooling method used: -A for air-cooled, -W for water-cooled, and –R
for remote-air cooled.
2-40 HP Portable Chillers
Chapter 2: Functional Description
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2-2 General Description
Our portable chillers are reliable, accurate, and easy to use process cooling units. They are
available in air-, water-, and remote air-cooled designs in a range of sizes from 2 to 40 tons.
All are self-contained, fully portable and shipped ready to use. (Remote air-cooled chillers
require field installation by qualified technicians.)
Standard range of operation is 30ºF to 65ºF (-1ºC to 18ºC) for applications using a
water/glycol mix and 45ºF to 65ºF (7º to 18ºC) for water only applications.
A factory installed crankcase pressure regulating valve option is available for processes
requiring a leaving water temperature of up to 75ºF (24ºC).
Chilled Water Circuit
Cooling water “To Process” and “From Process” connections are made at the gate valves
provided outside the unit. Warm coolant (water and glycol mixture) returns from the process
and goes into the reservoir tank. The coolant is then pumped through the evaporator where it
is cooled. The coolant flows to the process and returns to repeat the cycle.
A pressure actuated process water bypass valve located between the supply line and reservoir
tank (single pump models only) allows minimal flow through the unit during the intermittent
fluctuating flow conditions. It is not intended to provide continuous full bypass flow.
This minimal flow allows the temperature sensor to signal the controller to shut down the
compressor because of the drop in process water temperature. Typically the flow switch shuts
down the chiller in this low flow condition.
The 2 hp and 3 1/2 hp models have a 1/4” poly-tubing constant bypass to provide additional
process water bypass to prevent system freeze-up.
Refrigeration Circuit
Air-, water-, and remote air-cooled refrigerant condensing differs only in the way the
compressed gas is condensed to a liquid.
Liquid refrigerant from the condenser heat exchanger flowing in the liquid line passes
through a shut-off valve (5 hp to 40 hp chillers only) into a filter/dryer that removes moisture
and other contaminants. A refrigerant sight glass is provided. The refrigerant then passes
through the thermal expansion valve, which allows the refrigerant to expand (boil off) and
cool the fluid inside of the evaporator. The refrigerant gas flows through the suction linen
back into the compressor.
The refrigerant is compressed in the compressor and flows through the discharge line as a gas
to the condenser. There it gives up its heat as it condenses to a liquid in the condenser.
A hot gas bypass valve is used to control cooling capacity during intermittent or partial load
conditions. This feature contributes substantially to chiller longevity by eliminating excessive
cycling of the compressor and providing close temperature control.
2-40 HP Portable Chillers
Chapter 2: Functional Description
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2-3 Standard Features
Mechanical Features
Compressor. Hermetic scroll compressors are used on 2 hp through 30 hp (1.49 through
23.37 kW) models. Semi-hermetic discus compressors are used on the 35 hp and 40 hp (26.20
and 29.83 kW) models.
Evaporator. Stainless steel copper brazed plate evaporators are used on 2 hp through 30 hp
models. Shell and tube evaporators are used on the 35 hp and 40 hp models.
Air-Cooled Condenser. Aluminum fin/copper tube with washable filters, package unit only.
Water-Cooled Condenser. 2 hp to 7.5 hp models use tube-in-tube condensers. 10 hp to 40
hp use cleanable shell and tube condensers. All come with cooling water regulating valves
for cooling tower water or city water.
Remote Air-Cooled Condenser. 5 hp to 50 hp only. Aluminum fin/copper tube with low
ambient control down to –20ºF (-29ºC) via pressure-actuated fan staging and a variable-speed
primary fan.
Reservoir. 2 hp and 3 1/2 hp models use a 6 gallon polyethylene tank. 5 hp and 7.5 hp
models use a 20 gallon polyethylene tank. 10 hp and 15 hp models use a 40 gallon
polyethylene tank. 20 hp to 30 hp models use an 80 gallon polyethylene tank, and 35 hp and
40 hp models use an 80 gallon stainless steel tank.
Piping. Non-ferrous piping for 2 hp through 30 hp models. 35 hp and 40 hp models have
ferrous piping.
Pump. Non-overloading ODP motors, horizontally mounted stamped stainless steel or cast
bronze construction.
Other Mechanical Features
• External fill/drain sight glass
• Low process water pressure switch on 2 hp and 3 1/2 hp models
• Low process water flow switch on 5 hp to 40 hp models
• Galvanized steel mounting rails for remote air-cooled models
• NEMA-rated fan motor(s) on air-cooled models
• Galvanized structural steel frame, painted cabinetry, with 2 1/2” swivel casters on 2 hp
and 3 1/2 hp models. 4” swivel casters on 5 hp to 15 hp models, and 5” swivel casters
with brake on 20 hp to 40 hp models.
• Valved process water connections
• Pressure-actuated process water bypass valve for system protection only; on single
pump models only
• To process 2 1/2” dual scale liquid-filled water pressure gauge
• Fully insulated refrigeration and process water piping
• Isolated fan section on air-cooled models, allowing chiller to run during maintenance
• 20 mesh Y strainer on process water piping into the evaporator
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Electrical Features
• Fully accessible NEMA 12-style electrical control enclosure
• Single-point power and ground connection
• Non-fused disconnect switch, lockable
• Branch circuit fusing
• 208-230/3/60 and 460/3/60 volt (consult factory for other voltages)
• 208-230/1/60 volt on 2 and 3 1/2 hp models
Refrigeration Features
• R-22 refrigerant
• Hot gas bypass capacity control
• High discharge temperature cutout on 2 hp to 30 hp models
• High and low refrigerant pressure cutout switches
• Fan cycling switch (5 hp to 30 hp air-cooled models only)
• High pressure spring actuated relief valve
• Multiple refrigeration access ports
• Compressor service valves
• Hot gas bypass and liquid line shut-off ball valves on 5 hp to 40 hp models
• Filter-dryer
• Sight glass
• Balanced port thermal expansion valve
Controller Features
• Off-the-shelf microprocessor-based PID auto-tuning controller with To Process and
Set Point LED readout
• Microprocessor temperature switch with LCD display for process water freeze
protection compressor cutout, and high process water temperature pump cutout
• Electronic time delay for proof of water flow/pressure (models w/pump only)
• Off-delay water flow timer to prevent short cycling (models w/pump only)
• Low refrigerant pressure switch, override timer for low ambient start-up on remote air-
cooled and air-cooled chillers with the variable-speed fan option.
• Graphic control panel with indicating and warning status lights
Other Features
• One year labor warranty and one year compressor warranty
• Two year parts warranty
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• Three year limited controller warranty
2-4 Safety Devices and Interlocks
High/Low Thermostat Control
The high/low thermostat is a cutout device that protects the chiller system in two ways. Stage
one of the thermostat shuts down the compressor if the chilled process water/glycol
temperature approaches the particular mixture’s freezing point. The chilled process
water/glycol pump will continue to run.
The high/low thermostat stage one cutout temperature is factory-set at 42ºF (5.5ºC). This is
correct for a supply water temperature of 50ºF (10ºC), the rated capacity operating
temperature. If you want lower chilled water temperatures, mix process water with glycol to
provide protection down to 20ºF (11ºC) below the operating “To Process” temperature you
want. You can then reset the high/low thermostat cutout temperature to a temperature 8ºF
(4.4ºC) below the operating temperature you want.
Stage two of the high/low thermostat shuts down the pumps, therefore shutting off the chiller,
if the chilled process water/glycol temperature rises above the selected cutout point. This
prevents possible damage to the complete process piping system due to overheating of the
components by the process water/glycol. The thermostat stage two cutout temperature is
factory set at 100ºF (38ºC). See Section 4-6 on page 36 for information about changing the
thermostat settings.
Caution! Protect the system from freezing with glycol 20ºF below the leaving water
temperature set point. Condensation may form inside the pump tank and dilute
the mixture, therefore the freezing point should be verified periodically. See
Figure 6 on page 26 for the correct mixture.
Caution! Set high/low thermostat cutout temperature 8ºF below the set point leaving
water temperature.
Crankcase Heater
5 hp through 40 hp portable chillers have a crankcase heater. It is wired through the control
transformer that operates continuously whenever power is applied to the chiller.
Caution! Energize the crankcase heater for at least 24 hours before initial startup to
drive dissolved refrigerant from the compressor oil. Failure to do so will
damage the compressor.
High Pressure Cutout
This electro-mechanical cutout device opens the compressor control circuit if the refrigeration
system compressor discharge pressure exceeds 375 psi for an air-cooled chiller and 290 psi
for a water-cooled chiller.
Note:
The high-pressure cutout is a manual reset device typically mounted on the
compressor discharge line inside the mechanical cabinet. Call a refrigeration
service technician to analyze the problem and reset the control.
2-40 HP Portable Chillers
Chapter 2: Functional Description
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Low Pressure Cutout
This electro-mechanical cutout device opens the compressor control circuit if refrigeration
system compressor suction pressure drops below 15 psi. It automatically resets when
refrigerant suction pressure reaches 30 psi.
Note:
The low pressure cutout is an automatic reset device typically mounted on the
compressor suction line inside the mechanical cabinet. Call a refrigeration
service technician to analyze the problem and reset the control.
Oil Pressure Safety Switch
This mechanical cutout device is installed on chillers built with semi-hermetic compressors
that have oil pumps. A differential pressure switch monitors the difference between crankcase
pressure and oil pump pressure.
If the pressure drops to an unsafe level for more than two minutes, the switch opens the
control wiring circuit, shutting off the compressor and turning the light on, but the pumps will
continue running.
Note:
The oil pressure safety switch is a manual reset device. Call a refrigeration
service technician to analyze the problem and reset the control.
Fan Cycling Switch
Air-cooled models only. 5 hp and 7.5 hp models have one fan. The fan cycling switch turns
on the fan when the discharge pressure in the condenser reaches 300 psi and turns it off when
the pressure drops below 190 psi.
10 hp to 30 hp models have two fans. One fan runs continuously every time the compressor
operates. The second fan turns on when the discharge pressure in the condenser reaches 275
psi and turns off when the pressure drops below 200 psi.
Pressure Switch
2 hp and 3 1/2 hp models have a pressure switch cutout device mounted in the process piping.
The switch shuts down the chiller if it senses that the water/glycol pressure through the
evaporator has dropped below an acceptable level. The pressure switch opens the control
circuit, shuts down the pumps, and shuts off the chiller.
Flow Switch
5 hp to 40 hp models only. The flow switch cutout device, mounted in the process piping,
shuts down the chiller if senses that the water/glycol flow rate through the evaporator has
dropped below an acceptable level. The flow switch opens the control circuit and shuts down
the pumps and the chiller.
Remote Start/Stop Interlock
An additional contact is provided to allow the remote starting or stopping of the chiller. To
use this feature, remove the jumper between terminals X1 and 1, and supply a switch or dry
contact interlock connected in series between these two terminals. Refer to the schematic
inside the control enclosure door.
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Chapter 2: Functional Description
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2-5 Optional Features
Options marked with “*” indicate options that can be factory installed or retrofitted in the
field.
Automatic Water Make-Up*. Not available on chillers less reservoir tank. Includes a
pressure-regulating valve set at 3 to 5 psi, an electric water solenoid valve, a float switch
mounted in the reservoir tank, and the necessary internal piping to connect the chiller to a
make-up water source. See Appendix for typical piping diagrams.
Caution! Customer piping must provide backflow protection and venting of tank to
atmosphere to prevent over-pressurization of the reservoir tank. See Central
and Gravity Return Piping with Standpipe Diagram on page 64.
Process Water Sidestream Filter*. Not available on chillers less pump and reservoir tank.
Includes a 50 micron filter, flow meter, ball valve for throttling water flow, and the necessary
piping to provide constant filtering of the process water at about one gallon per minute (1
gpm/3.8lpm).
General Fault Indicator Audible Alarm*. Includes an 85 dB @ 2 ft. audible alarm buzzer
and silence button with provisions for customer wiring indication interlock. The alarm signals
anytime that a fault is recognized during the operation of the chiller.
General Fault Indicator Audible/Visual Alarm*. Includes a 100 dB @ 10 ft. audible alarm
horn/ 108,000 peak candlepower 80-flash/min. visual alarm strobe and silence button with
provisions for customer wiring indication interlock. The alarm signals anytime that a fault is
recognized during the operation of the chiller.
Compressor Hour Meter*. Includes a DIN-mount hour meter that keeps track of the total
time that the compressor runs.
Communications Options. RS-232C and RS-485 communications standards are available.
Recirculation Pump. Necessary whenever process water flow is less than 2.2 gpm per ton
(8.3 lpm per 3.517 kW) or greater than 4.8 gpm per ton (18.2 lpm per 3.517 kW).
High Pressure Fans. Provides for an additional 0.30”WC (75 pa) of static pressure on fan
discharge. High-pressure fans are necessary and must be included in chiller installations
where exiting air exhausts through ductwork.
The fans are available on 5 to 15 hp air-cooled chillers. They can be retrofitted without sheet
metal modification, but will require changing out fan blades, and in some cases, fan motors
and electrical components. 20 hp to 30 hp models come standard with squirrel cage blowers,
which can be ducted.
Variable Speed Fan. Available on 5 to 15 hp air-cooled chillers. Reduces the speed of the
fan based on entering air temperature and system load, allowing the chiller to operate in
ambient temperatures below 60ºF (15.5ºC). This option will also reduce fan noise in ambients
below 95ºF (35ºC).
Crankcase Pressure Regulating (CPR) Valve. Required on chillers operating at leaving
water temperatures from 66ºF to 75ºF (10ºC to 24ºC). This valve prevents compressor motor
overloading.
2-40 HP Portable Chillers
Chapter 2: Functional Description
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Stainless Steel Reservoir. 5 hp to 30 hp models only (Standard on 35 hp and 40 hp models).
Manufactured from 304 stainless steel.
Mounting Features.
• Locking 5” swivel casters with brake, optional on air- and water- cooled 5 hp to 15 hp
models
• Mounting rails: standard on remote air-cooled models, optional on other models
• Mounting rails with feet
Optional Operating Voltages. 380/3/50 volt available on 5 hp to 40 hp models only. Consult
factory for other voltages
UL Labeled Electrical Subpanel. Provides for the subpanel to be listed with Underwriters
Laboratory, with UL-related benefits and features.
Optional Pumps. Pump options are available for greater pressure and flow rates. A
recirculation pump is required whenever process water flow is less than 2.2 gpm per ton or
greater than 4.8 gpm per tone. See Figure 1 on page 16 for optional pump amperages.
NEMA 12 Electrical Enclosure. 5 hp to 40 hp models only. Provides for NEMA 12-level
electrical enclosure protection. Includes an accessible protective window kit over the graphic
control panel.
NEMA 12 Control Access Door. Includes an accessible protective window kit over the
graphic control panel.
2-40 HP Portable Chillers
Chapter 2: Functional Description
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Figure 1: Optional Pump Amperages
Voltage Construction
HP
.75
1
Full Load Amps
208-230/1/60 Bronze Turbine
SS
5.4
6.4
7.5
9.6
12.7
1.5
1.8
2.3
3.1
4.2
6.2
9.8
13.2
19.0
2.7
4.5
6.6
9.0
1.5
2
3
460/3/60
Bronze Turbine
SS
.75
1
1.5
2
3
5
7.5
10
15
2
Dual SS
3
5
7.5
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Chapter 3: Installation
3-1 Uncrating
2 hp to 5 hp models are shipped mounted on a skid, enclosed in a plastic wrapper, and
contained in a cardboard box. 7.5 to 40 hp models are shipped mounted on a skid, enclosed in
a plastic wrapper, and open-crated on all four sides and top.
1. Pry the crating away from the skid.
Note:
2 to 5 hp models: remove the nails holding the box to the skid and
lift the box off carefully, avoiding staples in the 1’ x 4’ wood
supports. Cut the steel banding.
2. Use a pry bar to remove the blocks securing the unit to the skid.
3. Lift unit from sides, inserting forklift under the base. The forks must be equidistant
from the centerline of the unit and the unit must be balanced on the forks. (20 hp to
40 hp units feature special lifting openings.) Lift slowly and only high enough to
clear the skid. Use a pry bar if necessary to carefully remove the skid from the unit.
4. Lower slowly. The unit should land on its casters or rails and can then be moved into
position.
5. Temporary hardware has been installed to prevent side panels from shifting in transit.
Remove hardware.
6. Retain the crating material for reshipping the chiller in case hidden shipping damage
is found.
Caution! Never remove the unit from the front (electrical control end) or the rear (pipe
connection end). Damage may result.
3-2 Electrical Connections
Supply electricity of the voltage, phase, and cycle listed on the serial tag. Total running amps
are also found in the specification tables on pages 45-57 in the Appendix.
Bring properly sized power leads and ground from a fused disconnect (installed by your
electrician) to the unit. Use dual-element fuses in the disconnect switch, sized according to
the National Electrical Code recommendations. Note the outline drawings for egress into the
cabinet. Make sure all electrical connections are tight.
Typical wiring schematics are located on pages 70-78 in the Appendix.
Warning! Make sure that electrical connections comply with all applicable electrical
codes. Ground the chiller in accordance with NEC Article 250.
Operation voltage must be within plus or minus 10% of the nameplate rating.
Phase imbalance must be below 10%
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3-3 Process Water Connections
All of our portable chillers have two chilled water connections. The chilled water supply,
labeled “To Process” is the outlet for the chilled water leading to the process being cooled.
The chilled water return, labeled “From Process” is the inlet leading from the process back
into the chiller to be cooled and re-circulated.
All external chilled water connections should be run full size to the process. Flow and
pressure information is available on pages 58-61 in the Appendix. The largest possible
openings and passages should be provided for the flow of chilled water through platens, dies,
molds, or other pieces of equipment.
Note:
Be sure to reduce external pressure drop as much as possible by generously
sizing piping and tooling water passageways.
3-4 Bypass Valve Considerations
Our portable chillers have a spring-loaded bypass valve. If the chilled water shut-off valves
are inadvertently closed while the chiller is running, the factory-set bypass valve opens and
allows a small amount of water to flow through the chiller. This action protects the chiller
from freeze-up and allows the other cutout devices to shut down the chiller. The bypass valve
is not intended to provide continuous full bypass flow.
Caution! Do not attempt to adjust or otherwise tamper with the bypass valve. Your
warranty will be voided.
3-5 Galvanic Corrosion Considerations
The materials used in the water circuit piping of these chillers are non-ferrous and react
electro-chemically with ferrous metallic materials. Some water has dissolved minerals that
greatly accelerate the reaction between dissimilar metals.
PVC or non-ferrous piping is recommended to reduce galvanic action. If iron piping must be
used, use dielectric unions at the chiller.
3-6 Water Treatment Considerations
Water treatment is an integral part of the system. In some locations, water may cause large
deposits of scale, erosion, algae, and/or corrosion.
The use of poor quality water may result in inefficient operation, heat exchanger damage, and
pump seal damage. Consult a qualified water treatment specialist to determine whether
treatment is needed.
We offer a complete line of water treatment equipment. Contact your sales representative for
water testing and treatment options.
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3-7 Condenser Considerations
Water-Cooled Chiller Condensers
Water-cooled portable chillers can use city water or tower water as a cooling medium. Make
sure that all external piping and connections supplying and discharging water to and from the
condenser are full size.
You’ll make two connections to the water-cooled condenser:
Condenser Water In. The condenser water supply, labeled “Condenser Water In”, is located
at the rear of the chiller. It is the inlet for city or tower water.
Make sure that water is supplied at a maximum temperature of 85ºF (29ºC) and a minimum
pressure of 25 psi.
Caution! The water-regulating valve is set at the factory. Only a qualified refrigeration
technician should adjust it.
Normal R-22 refrigerant condensing pressure is 210 psi, with 85ºF (27ºC) water at 25 psi
entering condenser water pressure
Condenser Water Out. Condenser water return, labeled “Condenser Water Out”, is located
at the rear of the chiller. It is the outlet for water after it has passed through the condenser.
It is connected to the tower inlet or to a sewer or other approved discharge receiver. A water-
regulating valve is a standard feature in the condenser water return line.
Air-Cooled Chiller Condensers
Air-cooled chillers use the surrounding air to cool the condenser. Install the chiller in an area
where there is free passage of air for condensing and provisions for removal of heated air
from the area. Do not locate air-cooled chillers in locations where steam, hot air, or fume
exhausts can be drawn into the chiller. A typical ductwork diagram is located on page 63 in
the Appendix of this manual.
Caution! Clean air-cooled condensers and filters frequently. Failure to do so results in
reduced capacity, increased operating costs, and possible failure of the
equipment. Cleaning instructions can be found on page 38 in the Maintenance
chapter of this manual
Normal maximum refrigerant condensing pressure with 95ºF (35ºC) air entering the
condenser is 260 psi.
Condensing Air Temperature. Our air-cooled portable chillers are designed to operate at a
minimum condenser entering air temperature of approximately 60ºF (15.5ºC). Operation of
the equipment at a lower condenser entering air temperature can cause the chiller to lose
capacity. For entering air temperatures below 60ºF, an optional fan motor speed control is
available. We recommend maintaining a minimum 60ºF ambient temperature.
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Remote Air-Cooled Chiller Condensers
Remote air-cooled portable chillers are shipped with nitrogen holding charge and a full
charge of oil (excluding the amount needed for field piping). The remote air condenser is
shipped with a dry air charge. Verify that the holding charge has not been lost prior to
installation. If there is no pressure, leak test the unit and repair before installing the
interconnecting refrigerant piping. Read this entire section before installation.
Note:
Piping should be type “L” or type “K” refrigerant grade copper tubing only.
Proper sizing and installation has a significant effect on system performance,
reliability, and safety.
Interconnecting Refrigerant Piping. The chiller and condenser refrigerant lines are
terminated with a cap and brazed closed. Use a tube cutter to remove caps.
Caution! Do not use a saw to remove the end caps because this will allow copper chips to
contaminate the system.
A certified refrigeration contractor need only to install the interconnecting refrigerant piping
between the chiller and the outdoor air-cooled condenser. This piping must be properly sized,
type “L” or type “K” refrigerant grade tubing, high temperature brazed, Install a customer
supplied 400 psi approved refrigerant relief valve in the discharge line at the condenser,
following all codes.
When brazing copper joints, flow dry nitrogen through the system to prevent carbon/scale
formation, which causes contamination. Isolate the refrigerant lines from the building,
preventing transfer of line vibration to the structure. Do not secure the lines rigidly.
Leak check and evacuate the system down to 400 microns. A decay of 50 microns after one
hour is acceptable.
Warning! To prevent injury or death due to explosion and/or inhalation of phosgene gas,
purge system thoroughly while brazing refrigerant piping connections. Use a
pressure regulator in the line between the unit and the high-pressure nitrogen
cylinder to avoid over-pressurization and possible explosion.
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System Configuration. The system can be configured in any of the arrangements shown on
page 62 of the Appendix. The configuration and distance between the chiller and the
condenser affects pipe size, refrigerant charge, oil return, and oil charge. Therefore there are
limitations that must be adhered to for reliable and optimal operation.
• Leaving water temperature affects discharge line size. Be sure to inform the installing
contractor of the leaving water temperature range in which the chiller will be operating
• The total distance between the chiller and condenser must not exceed 200 feet or 300
equivalent pipe feet
• Discharge line risers cannot exceed an elevation difference greater than 100 feet
without a 2% efficiency decrease.
• Refer to page 62 of the Appendix for the location of traps.
• Refrigeration lines must not be crossed, i.e., chiller liquid lines are to be piped to
condenser liquid lines.
Sizing Refrigerant Lines. To determine field installed liquid and discharge line sizes, first
establish the equivalent length of pipe for each line, valve, and elbow. Chiller capacity and
leaving water temperature range is also required. See Figure 2 on page 22 for lengths of
refrigerant valves and fittings.
Liquid Line Sizing. The liquid line should be sized as small as possible while maintaining
acceptable pressure drop to minimize the refrigerant charge. Liquid line risers must not
exceed 15 feet from the base of the air-cooled condenser. Horizontal runs do not require a
pitch. Insulation is not required unless the line is installed in a high ambient area, i.e., boiler
room. Install a liquid line-charging valve to facilitate refrigerant charging. See Figure 3 on
page 22 for sizing information. See Figure 5 on page 23 for charge determination.
Discharge Line Sizing. For horizontal runs, the discharge line should be pitched downward,
in the direction of flow, at a rate of 1/2” for every 10 feet. This will allow oil to flow towards
the condenser. Discharge line sizing is based on the velocity required for sufficient oil return
back to the compressor. See Figure 4 on page 22 for discharge line sizing.
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Figure 2: Equivalent Length in Feet for Valves and Fittings
Line Size
Inches OD
1/2”
Globe Valve
Equivalent Ft
Angle Valve
Equivalent Ft
Short Radius Elbow
Long Radius Elbow
Equivalent Ft
Equivalent Ft
43
55
69
15
18
24
29
33
34
39
44
1.4
1.6
2.0
2.7
3.2
3.8
5.2
6.5
0.9
1.0
1.4
1.9
2.2
2.6
3.4
4.2
5/8”
7/8”
1 1/8”
1 3/8”
1 5/8’
2 1/8”
2 5/8”
87
102
115
141
159
Figure 3: Liquid Line Sizing
30 – 65°F Leaving Water Temperature
Liquid Line Size (O.D.”)
Eqiv. FT
5 hp
7.5 hp
10 hp
15 hp
20 hp
25 hp
30 hp
35 hp
40 hp
25
50
75
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
7/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
100
125
150
175
200
225
250
275
300
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
Figure 4: Discharge Line Sizing
30 – 65°F Leaving Water Temperature
Discharge Line Size (O.D.”)
Eqiv. FT
25
5 hp
7/8
7/8
7/8
7/8
7.5 hp
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
10 hp
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
15 hp
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
20 hp
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
25 hp
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
30 hp
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
35 hp
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
40 hp
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
50
75
100
125
150
175
200
225
250
275
300
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
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Refrigerant Charge Determination. The approximate amount of refrigerant charge required
by the system varies based on the total length of the refrigerant lines and the size of the
chiller. Referring to Figure 5, determine the amount of charge based on the horsepower of the
chiller and the amount of charge based on discharge and liquid line sizes and lengths. Add
these three numbers together to find the final operating charge. The final operating charge
must be verified by running the system and checking the liquid line sight glass.
Figure 5: Refrigerant Charge Determination
Chiller Condenser Charge
Field Installed Piping Charge
Horsepower
Pipe O.D.
Inches
Discharge Line
c R-22(Lbs.)
Liquid Line
c R-22(Lbs.)
Lbs. of
R-22
5.9
5
1/2”
5/8”
7/8”
1 1/8”
1 3/8”
1 5/8’
2 1/8”
2 5/8”
-
-
7.2
11.5
24.0
40.9
62.2
88.1
153.0
236.0
7.5
10
15
20
25
30
35
40
6.1
10.8
12.6
21.2
24.2
40.2
41.2
50.2
1.6
2.7
4.0
5.7
10.0
15.0
c Based on 100 feet of pipe, 100 ºF Liquid, 100 ºF Discharge
Oil Charge Determination. The remote air-cooled portable chillers are factory charged with
the amount of oil required without field-installed piping. Additional oil required is dependent
on the amount of additional refrigerant added.
Calculate the amount of additional oil required by using the following formula:
Pints of oil (Sunisco 3GS) = lbs. of R-22 added for field installed piping / 100.
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3-8 Checking Motor Direction
All of our portable chillers have their motor rotations properly phased at the factory. If
compressors, pumps, or fans are running in reverse rotation, disconnect and lock out the
power source and reverse any two power leads into the chiller disconnect switch.
Caution! Do not switch leads at the motors, motor starters, or contactors.
Three-Phase Compressors
Scroll compressors are directionally-dependent and compress in one rotational direction.
Reversing rotation direction results in an elevated sound level and a substantially-reduced
current draw.
Water Pumps
Correct pump rotation is indicated by a positive pressure of 20 to 40 psi on the pump pressure
gauge. Pump rotation should be clockwise when viewed from the motor end. For chillers with
optional pumps, check the appropriate pump curve in the Appendix.
Caution! Do not run pump dry. Doing so will result in seal damage.
Condenser Fan
Air should be drawn through the condenser and discharged vertically from the chiller.
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3-9 Water Reservoir
All portable chillers shipped during the fall, winter, or spring, or those units that are shipped
from stock are flushed at the factory with a water/ethylene glycol solution to prevent piping
components prone to retaining water from freezing. During startup and when additional
solution is required, refer to the ethylene glycol and propylene glycol curves in Figure 6 on
page 26. Add a pre-mixed solution of industrial quality (not automotive) ethylene glycol or
propylene glycol and water to provide freeze protection to a temperature 20ºF (11ºC) below
the normal chiller operating temperature set point.
Glycol and/or water, with an inhibitor, should be used to protect the materials (copper, steel,
stainless steel, and bronze) in the system from corrosion. If you intend to use straight water,
we strongly advise a minimum leaving water temperature of 50ºF (10ºC) or contact the
service department.
The following glycol products are available:
Part Number Description
A0541358
A0539637
A0542990
A0542991
Ethylene glycol, 5 gallons (18.9 liters)
Ethylene glycol, 55 gallons (208.2 liters)
Propylene glycol, 5 gallons (18.9 liters)
Propylene glycol, 55 gallons (208.2 liters)
Caution! Do not connect make-up water directly to the chilled water reservoir unless you
have an approved automatic water make-up system installed.
The reservoir is not designed to withstand water pressure. The fill opening and vent line must
be vented to the atmosphere for proper operation. The optional automatic make-up system is
described in section 3-10 on page 27.
Caution! Do not pressurize tank. Fill and vent lines must be open to atmosphere. Supply
and return connections must be trapped and vented to allow vertical risers to
drain into tank. Do not overfill system. Allow enough free space in tank for
vertical piping to drain.
If your application has chilled water or process piping above the reservoir fill and vent level,
trap and vent the supply and return lines to allow vertical piping to drain into tank. (See page
64.)
Note:
In applications where the process or process piping is above the reservoir, take
steps to prevent over pressurization of the reservoir. This condition can occur
on system shutdown when the water in the system drains into the reservoir. To
prevent this, a vacuum breaker should be installed at the high point of the “To
Process” and “From Process” lines. See page 64.
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Figure 6: Ethylene Glycol and Propylene Glycol Curves
Pe rce nt G lyc ol Cu rves for Free ze Protec tion
40.0
30.0
20.0
Eth ylene G lycol
Prop ylene Glycol
10.0
0.0
-10.0
-20.0
-30.0
-40.0
-50.0
-60.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
% Gl ycol by Vol um e
Example: 45°F set point minus 20°F = 25°F.
From Figure 28, 25°F equates to 10% by volume of glycol required.
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3-10 Automatic Water Make-Up Option
The chiller may be connected to an automatic make-up system if the optional package (float
switch, pressure regulating, pipe fittings, solenoid valve and 1/2” NPT city water make-up
connection) is factory installed.
Refer to the typical piping schematics on pages 64-69 in the Appendix for additional
components necessary for this installation.
Prevent reservoir over-pressurization by setting the required pressure-regulating valve to limit
make-up water pressure to less than 5 psi. The reservoir must remain vented to the
atmosphere.
If the automatic make-up system is connected to a city water system, make provisions to
prevent backflow contamination. Install an approved backflow preventer in accordance with
local codes.
Caution! Adding straight city water into a glycol/water mixture dilutes the solution and
eventually leads to system freeze-up. Damage from freeze-up is not covered by
the warranty.
To prevent system freeze-up in automatic make-up applications, we recommend using either
a chemical feeder or make-up reservoir to replenish glycol. Contact the sales department for
more information about these configurations.
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3-11 Initial Start-Up
• Check the shipping papers against the serial tag to be sure chiller size, type and voltage
is correct for the process that will be controlled. Portable chillers are built with a
voltage specific compressor and cannot be re-wired for an alternate voltage.
• Check the transformer primary voltage connections to be sure they are configured for
the electrical power you are using. The voltage at the main power connection must read
within plus or minus ten percent (±10%) of the voltage listed on the serial tag.
Electrical connections must conform to all applicable codes.
• Complete chilled water To Process and From Process connections.
• Make sure the chilled water To and From process valves on the chiller are open.
• Be sure the reservoir tank and chilled water circuit piping are filled to the full mark
with a water/glycol mixture. The water/glycol mixture should provide for freeze
protection to at least 20°F (11ºC) below the leaving water temperature you want.
• The air-cooled condenser should have an adequate supply of 60º to 95ºF (16º to 35ºC)
air for proper operation.
• The tower or city water condenser cooling in and out connections should be completed
and an adequate supply of 85ºF (30ºC) tower or 70ºF (21ºC) city water, at 25 psi
pressure, for proper operation.
• Connect the main 3 phase incoming power to the unit making certain that line one (1)
L1 is connected to the A phase, line two (2) L2 is connected to the B phase, and line
three (3) L3 is connected to the C phase. Check for proper rotation direction of fan(s)
and pump(s). 2 hp and 3 hp models are single phase.
The crankcase heater is automatically energized when the main power is applied. It
should be on for at least 24 hours before startup to force dissolved refrigerant from the
compressor oil.
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Chapter 4: Operation
4-1 Panel Buttons, Indicator Lights, and Switches
Microprocessor Controllers
Standard chillers use a microprocessor-based PID controller. These controllers are modular,
self-contained units that can slide from their mounting housing. They are factory set and
adjusted; no field adjustment to the internal controls are necessary. Their standard operation
range is 30ºF to 65ºF (-1ºC to 18ºC). See Figure 7: Typical Portable Chiller Microprocessor
Controller.
E5CK Controller
Indicator
Name
Description
PV
Process Value LED During normal operation, the large red PV LED
on the controller displays the actual process
8.8.8.8
temperature at the “To Process” thermocouple. It
also lists parameter symbols during setup and
error messages if an error occurs
SV
Set Value LED
During normal operation, the green SV LED on
the controller displays the process set point you
want the chiller to maintain. It also displays
parameter and pre-set function values during set
up.
8.8.8.8
Out 1 LED
Out 2 LED
The orange OUT1 LED lights when the control
output energizes the hot-gas bypass solenoid valve
OUT1
OUT2
The orange OUT2 LED lights whenever the
process temperature is two degrees or more above
the “To Process” setpoint. The compressor then
comes on and runs until the temperature at the “To
Process” thermocouple is two degrees below the
setpoint.
MANU LED
Stop LED
RMT LED
AT LED
The orange MANU LED is not used and does not
light.
MANU
STOP
RMT
AT
The orange STOP LED is not used and does not
light.
The orange RMT LED is lit during remote
operation.
The orange AT LED flashes during auto-tuning.
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Indicator
Name
Description
SUB 1 LED
The orange SUB1 LED lights when the process
temperature is two degrees or more below the “To
Process” setpoint. The compressor then shuts
down by means of a latching circuit, and it does
not run again until the temperature at the “To
Process” thermocouple is two degrees above the
setpoint.
SUB1
AutoTune Key
Display Key
Press and hold the AT key for two seconds to
initiate or stop the auto-tune function
AT
The functions of the Display key change based on
how long you press it. Press the Display key for
less than one (1) second to scroll through
parameters within the mode.
Down Arrow Key
Up Arrow Key
Each press of the Down Arrow key decrements or
reduces values or settings on the SV display
Each press of the Up Arrow key increments or
advances the values or settings on the SV display.
Sterlco 2000 Controller
Indicator
Name
Description
T
Process Value LED During normal operation, the large red T LED on
the controller displays the actual process
8.8.8.8
temperature at the “To Process” thermocouple. It
also lists parameter symbols during setup and
error messages if an error occurs
SP
Set Value LED
During normal operation, the green SP LED on
the controller displays the process set point you
want the chiller to maintain. It also displays
parameter and pre-set function values during set
up.
8.8.8.8
Index Key
Press the Index key for less than (1) second to
scroll through parameters within the mode.
Up Arrow Key
Down Arrow Key
Enter Key
Each press of the Up Arrow key increments or
advances the values or settings on the SP display.
Each press of the Down Arrow key decrements or
reduces the values or settings on the SP display.
Press the Enter key to verify or confirm an entry.
2-40 HP Portable Chillers
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Figure 7: Typical Portable Chiller Microprocessor Controllers
PV
HT
CL
AL
REM
°F
°C
T
SP
%
SV
OUT1
OUT2 MANU STOP RMT
AT
SUB1
AT
2000
MADE IN U.S.A.
OMRON
E5CK
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Graphic Panel
(See Figure 8 on Page 32.)
Indicator Name
Description
Compressor On
Light
The Compressor On light turns on whenever the
compressor is operating.
Low Temperature
Light
The Low Temperature light comes on if the process
water/glycol temperature drops below the High/Low
thermostat set point. The High/Low thermostat stage
one switch opens the control circuit shutting down
the compressor, but the process water/glycol
pump(s) continue to operate. This action prevents
possible chiller evaporator freeze-up.
Hot Gas Bypass
Light
The Hot Gas By-Pass light turns on when the hot
gas bypass valve is in operation. The OUT1 LED on
the controller also lights when the hot gas bypass
valve is in operation.
High Temperature
Light
The High Temperature light comes on if the process
water/glycol temperature rises above the High/Low
thermostat stage two set point. The High/Low
thermostat stage two switch opens the control circuit
shutting down the process water/glycol pump(s),
and the chiller shuts off. This action prevents
possible system failure from overheating of the
process water/glycol.
Pump On Light
High Discharge
The Pump On light, installed on chillers with a
pump, lights whenever the pump(s) operates.
The High Discharge Temperature light comes on if
Temperature Light the compressor discharge line temperature switch
opens. This switch prevents possible compressor
failure due to over loading, the compressor stops,
but the pump(s) continue to run. This occurs when
the discharge line temperature rises above 260ºF
(127ºC). Call a qualified refrigeration service
technician or contact the Service Department.
Pump Overload
Light
The Pump Overload light, installed on chillers with
a pump(s), lights whenever a pump motor(s) has
shut down from a motor overload condition.
High Refrigerant
Pressure Light
The High Refrigerant Pressure light comes on if the
compressor discharge pressure exceeds the limit of
the high pressure cutout switch. The compressor
stops but the pump(s) continue to run until you
manually reset the high-pressure cutout switch. Call
a qualified refrigeration service technician or
contact the Service Department.
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Indicator Name
Low Water
Description
The Low Water Flow/Pressure light comes on when
the flow switch (pressure switch on 2 & 3 hp
models) senses that the water/glycol flow rate
through the evaporator has dropped below an
acceptable level. The flow switch opens shutting
down the pump(s) and the chiller.
Flow/Pressure
Light
Low Refrigerant
Pressure Light
The Low Refrigerant Pressure light come on if the
compressor suction pressure drops below the limit
of the low pressure cutout switch. The compressor
shuts off, but the pump(s) continues to run.
The indicator turns off and compressor restarts
automatically when the refrigerant pressure rises to
the limit of the low-pressure cutout switch. Call a
qualified refrigeration service technician or contact
the Service Department.
Low Oil Pressure
Light
The Low Oil Pressure light is installed on chillers
with a semi-hermetic compressor that have an oil
pump. A differential pressure switch monitors the
difference between crankcase pressure and oil pump
pressure.
If the pressure drops to an unsafe level for more
than two minutes the switch will open the control
wiring circuit, shutting off the compressor, turning
the light on, but allowing the pump(s) to continue
running. This is a manual reset switch. Call a
qualified refrigeration service technician or the
Service Department.
Control Power
Lighted Switch
The green, lighted, sustained-on Control Power
Switch lights whenever the switch is in the ON
position and the control circuit is energized.
Alarm Silence
Switch
The red momentary-on Alarm Silence Switch is
used to turn off the audible alarm on chillers that are
built with the audible or audible/visual alarm option.
This switch is always provided and requires no
additional wiring if either alarm option is installed at
a later time.
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Figure 8: Typical Graphic Panels
(With E5CK Controller)
COMPRESSOR
ON
LOW
TEMPERATURE
HOT GAS
BY-PASS
HIGH
TEMPERATURE
PUMP ON
HIGH DISCHARGE
TEMPERATURE
PV
PUMP
OVERLOAD
HIGH REFRIGERANT
PRESSURE
SV
OUT1
OUT2 MANU STOP RMT
AT
SUB1
LOW WATER
FLOW/PRESSURE
LOW REFRIGERANT
PRESSURE
AT
OMRON
E5CK
LOW OIL
PRESSURE
ON
CONTROL
POWER
ALARM
SILENCE
OFF
A0554705
(With Sterlco 2000 Controller)
COMPRESSOR
LOW
TEMPERATURE
ON
HOT GAS
BY-PASS
HIGH
TEMPERATURE
PUMP ON
HIGH DISCHARGE
TEMPERATURE
HT
CL
AL
REM
°F
T
PUMP
OVERLOAD
HIGH REFRIGERANT
PRESSURE
°C
SP
%
LOW WATER
FLOW/PRESSURE
LOW REFRIGERANT
PRESSURE
LOW OIL
PRESSURE
2000
MADE IN U.S.A.
ON
CONTROL
POWER
ALARM
SILENCE
OFF
A0554705
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4-2 Start-up
1. Turn on the chiller and put it under a process load.
2. Set the controller for the To Process temperature you want, using the Up
Arrow button or the Down Arrow button located on the face of the controller.
3. Adjust the High/Low thermostat, located in the electrical enclosure, to 8°F
(4.4ºC) below the To Process temperature you want. The High/Low
thermostat is factory-set at 42ºF (6ºC). See page 36 for information on
resetting the High/Low thermostat.
4. Check the pump amp draw and pump pressure. Make sure that the amp draw
reading is within the running load and service factor amps.
5. Operate the chiller, looking for any leaks and listening for unusual noises or
vibrations that could indicate improper operation.
Note:
Elevated sound level and substantially reduced current draw indicate reverse
rotation. After several minutes of operation, the compressor internal protector
trips.
4-3 Setting the Process Water Temperatures
E5CK Controller
To change the process water temperature set point, press the Up Arrow button to raise the set
point, and press the Down Arrow button to lower the set point.
Sterlco 2000 Controller
To change the process water temperature set point, press the Index key, then press the Up
Arrow button to raise the set point or the Down button to lower the set point. Press the Enter
key for the controller to accept the new values. Press the Index key to return to the Home
position.
4-4 Auto-Tuning
E5CK Controller Only
The Auto-Tune function lets you fine-tune the control PID to process requirements. Activate
the Auto-Tune function whenever the process under control changes. Don’t be alarmed by
control response. It may take the process temperature above and below the set points as many
as three times before leveling off and controlling the process set point. Auto-Tuning can take
up to 45 minutes and is best done before any product is being run.
1. Press and hold down the AT key for several seconds until the AT indicator
flashes.
2. When the AT LED light stops flashing, the controller is tuned and ready for
operation.
4-5 Optional Communications
The communications function allows you to monitor and set controller parameters by a
program prepared and running on a host computer connected to the controller.
When using the communications function, you must add on the unit for RS-232C or RS-485
communications. The controller communications function allows you to read/write
parameters, do operating instructions, and select the setting level.
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4-6 Programming the Electronic High/Low Thermostat
The thermostat control is located in the chiller enclosure. The control has three control keys
and a one-line, four-character LCD display.
The thermostat control has a lockout slide switch to prevent tampering by unauthorized
personnel. The switch is located on the inside cover of the thermostat. The keypad is disabled
when the switch is moved to the left in the “Lock” position. The keypad functions normally
when the switch is moved to the right in the “Unlock” position. All chillers are shipped with
the switch in the “Lock” position.
Thermostat Buttons
Indicator Name
Set Button
Description
The Set button is used to enter the programming
mode for the thermostat.
SET
Up Arrow button
Each press of the Down Arrow key decrements or
reduces values or settings on the display
Down Arrow
button
Each press of the Up Arrow key increments or
advances the values or settings on the display.
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Perform the following procedures to program the electronic High/Low Thermostat control:
Select Fahrenheit or Celsius
1. Press the Set key once to access Fahrenheit/Celsius mode
Use the Up Arrow and Down Arrow keys to toggle between Fahrenheit and Celsius.
Stage 1: Freeze Protection
2. Press the Set key again to access the low temperature set point. The screen displays
the current set point and the S1 indicator blinks on and off to indicate that the control
is in set point mode.
Use the Up Arrow and Down Arrow keys to adjust the set point. At 50ºF (10ºC)
leaving water temperature, the setting should be 42ºF (6ºC).
3. Press the Set key again to access the Stage 1 differential. The screen displays the
current differential and the DIF1 indicator blinks on and off to indicate that the
control is in differential mode.
Use the Up Arrow and Down Arrow keys to adjust the differential. The setting
should be 12ºF.
4. Press the Set key again to access Stage 1 cooling or heating mode. The screen
displays the current mode: C1 for cooling or H1 for Heating.
Use the Up Arrow and Down Arrow keys to toggle between C1 or H1. The setting
should be C1.
Stage 2: High Temperature Protection
5. Press the Set key again to access the high temperature set point. The screen displays
the current set point and the S2 indicator blinks on and off to indicate that the control
is in set point mode.
Use the Up Arrow and Down Arrow keys to adjust the set point. The setting should
be 100ºF (38ºC).
6. Press the Set key again to access the Stage 2 differential. The screen displays the
current differential and the DIF2 indicator blinks on and off to indicate that the
control is in differential mode.
Use the Up Arrow and Down Arrow keys to adjust the differential. The setting
should be 2ºF.
7. Press the Set key again to access Stage 2 cooling or heating mode. The screen
displays the current mode: C1 for cooling or H1 for Heating.
Use the Up Arrow and Down Arrow keys to toggle between C1 and H1. The setting
should be C1.
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Chapter 5: Maintenance
5-1 Lubrication
Grease all blower bearings, fan and blower motors, and pump motors that do not have
permanently sealed bearings. Remove the grease relief plug (motors only) before adding
grease, add grease until a small amount pours out, and replace the plug when finished.
Caution! Failure to remove the grease relief plug will result in dislodging the bearing
grease seal, eventually causing bearing failure.
Refrigeration compressors are hermetically sealed and no lubrication is required.
5-2 Filter Cleaning
Air filter cleaning is important to keep your air-cooled portable chiller operating at peak
efficiency and capacity. Clean the filters whenever they appear dirty, or at regularly
scheduled intervals.
1. Turn the chiller off.
2. Slide the filter up off of the retaining pins holding it in place along its bottom.
3. Tip the bottom of the filter away from the chiller.
4. Slide it down and out.
5. Wash down the filter with clean water (preferably with a garden hose), directing the flow
of water opposite the direction of airflow. If dirt is heavy, use a mild detergent and rinse
well. Allow the filter to dry completely before replacing it on the chiller.
Note:
Keep a spare air filter set on hand. Install and use it while cleaning).
Caution! Do not use compressed air to blow off a dirty filter. It will not clean very well,
and the filter could be damaged. Never run the chiller without properly
installed filters.
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5-3 Maintaining the Condenser
Dirty condenser heat exchange surfaces reduce system capacity and efficiency.
Air- and Remote Air-Cooled Chillers
Brush or vacuum light dirt accumulations off the aluminum condenser fins. Avoid bending or
damaging them. Heavy dirt accumulations on the fins may require professional cleaning.
Water-Cooled Chillers
Proper water treatment will greatly reduce cleaning intervals.
Coaxial Condensers (2 to 7.5 hp chillers). Remove dirt and slime in the condenser tube
water side by reverse-circulating with a mild detergent and water solution. Remove mineral
deposits by reverse circulating Liquid Inhibited Acid De-Scaling Solution (Part No.
A0502600) through the water side of the condenser. Follow the directions on the container.
Shell & Tube Condensers (10 to 40 hp chillers). Remove dirt and slime in the condenser
tube water side by cleaning with a nylon tube brush. Remove mineral deposits by reverse
circulating Liquid Inhibited Acid De-Scaling Solution (Part No. A0502600) through the tube
water side of the condenser. Follow the directions on the container.
The refrigerant side is sealed and requires no routine maintenance.
Caution! Do not use steam or water over 140ºF (60ºC) to clean a condenser unless you
are monitoring the refrigeration circuit for excessive pressure with gauges.
Only a trained technician should use this method.
5-4 Maintaining the Evaporator
Dirty evaporator heat exchange surfaces reduce system capacity and efficiency. Remove dirt
and slime in the evaporator by reverse-circulating with a mild detergent and water solution.
Remove mineral deposits by reverse-circulating Liquid Citric Acid De-Scaling Solution (Part
No. A0536607). Follow the directions on the container.
5-5 Evaporator Process Piping Y-Strainer
The process piping Y-strainer requires periodic cleaning of its screen to insure the proper
flow through the evaporator. To clean the strainer screen, remove the access plug and
retaining cap, and pull out the screen.
Wipe, brush, or vacuum out any dirt left in the strainer body. Clean the screen and replace it
in the strainer taking care to fit it squarely into the machined seat provided.
Caution! Do not forget to re-install the screen after cleaning it. Operating the chiller
with no strainer screen can potentially plug the evaporator with dirt. The
warranty does not cover chiller failures from a dirty evaporator.
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5-6 Preventative Maintenance Service
Follow a systematic preventive maintenance program to help avoid costly down time. Call
the Service Department to arrange a schedule of inspections. This service can be tailored to
fit your maintenance requirements. These inspections include, but are not limited to:
• Checking refrigerant suction and discharge pressures
• Checking safety and operating conditions
• Checking voltage and amperage of all motors
• Checking all electrical connections
• Checking quantity of refrigerant
• Checking compressor oil level
• Checking lubrication of motor and pump bearings.
• Checking circulating pump operation
• Checking flow through heat exchangers
• Checking compressor efficiency
• Checking noise levels
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Chapter 6: Troubleshooting
Problem
Possible cause
No power.
Solution
Check main disconnect, fuses, wiring,
and power lead to unit.
Voltage must be within plus or minus
10% of nameplate rating.
Replace.
Wrong voltage supplied to unit.
Defective on/off switch.
Replace control circuit fuse.
Check transformer.
Unit does not run.
Control circuit fuse blown.
Check for a short circuit.
Replace.
Add water or water/glycol solution as
required.
Defective control transformer.
Piping flow switch circuit open.
Pump motor off on overload.
High/Low thermostat set higher
than temperature of liquid in
system.
Reset and test.
Lower thermostat stage 1 set to 10°F
(6°C) below the leaving temperature
you want.
Defective High/Low thermostat.
Low refrigerant indicator on.
Replace.
Check refrigerant charge.
Sight glass should be clear and the
moisture indicator should be green
while compressor is running. Bubbles or
foaming is normal when the hot-gas by-
pass solenoid is energized. Call for
service if bubbling is occurring and/or
moisture indicator is yellow.
Clean the air filters.
Refrigerant low pressure switch
contacts open.
Check condenser fans for proper
rotation.
Check for dirty condenser.
Reset and test.
Refrigerant high-pressure indicator
on.
Pump runs; compressor does not.
Fan motor out on overload.
Defective fan cycling control.
Defective fan motor.
Reset and test.
Replace.
Repair or replace.
Allow time to cool and reset, then check
for high/low volt-age. It must be within
plus or minus 10% of the nameplate
rating.
Compressor internal overload or
fuses are open.
Check for open fuses and loose
compressor electrical connections.
Compressor contactor holding coil
open.
Defective pump motor to
compressor auxiliary contact.
Broken wire in the compressor
control circuit.
Repair or replace.
Repair or replace.
Locate and repair.
Pump runs, compressor cycles at
short intervals.
Incorrect High/Low Thermostat
setting.
Lower set point to 10°F (6°C) below
desired leaving water temperature.
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Problem
Possible cause
Solution
Make sure that the water/glycol mixture
protection is right for the process.
Water/glycol mixture inadequate
for process.
Defective or improperly set
High/Low thermostat.
Adjust or replace.
Water temperature is too high.
Refrigerant low pressure switch is
set too high.
Call service to adjust pressure control.
Call service to find and repair the leak,
then have refrigerant added.
Verify rotation; if running in reverse
rotation, reverse any two main power
leads. Re-verify for correct pump
rotation.
Refrigerant charge is low.
Pump pressure low (refer to curves
for normal pressure for various
pumps).
Pump running in reverse.
Check for foreign matter.
Restricted water flow.
Restricted condenser air.
Clean the system.
Check for partially closed valves etc.
Make sure that all lines are properly
sized.
Pump pressure is too high.
Clean filters.
Clean condenser.
Unit runs continuously, but not
enough cooling power.
Unit low on refrigerant.
Compressor not operating
efficiently.
Check the refrigerant charge.
Call service.
Unit under-sized for application.
Call sales rep.
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Chapter 7: Appendix
7-1 Warranty
We warrant all of our equipment to be free from defects in workmanship and material when
used under recommended conditions. The manufacturer’s obligation is limited to repair or
replace FOB the factory any parts that are returned prepaid within one year of equipment
shipment to the original purchaser, and which, in the manufacturer’s opinion, are defective.
Any replacement part assumes the unused portion of this warranty.
This parts warranty does not cover any labor charges for replacement of parts, adjustment
repairs, or any other work. This warranty does not apply to any equipment which, in the
manufacturer’s opinion, has been subjected to misuse, negligence, or operation in excess of
recommended limits, including freezing or which has been repaired or altered without the
manufacturer’s express authorization. If the serial number has been defaced or removed from
the component, the warranty on that component is void. Defective parts become the property
of the warrantor and are to be returned.
The manufacturer is not liable for any incidental, consequential, or special damages or
expenses. The manufacturer’s obligation for parts not furnished as components of its
manufactured equipment is limited to the warranty of the manufacturers of said parts.
Any sales, use, excise, or other tax incident to the replacement of parts under this warranty is
the responsibility of the purchaser.
The manufacturer neither assumes nor authorizes any other persons to assume for it any
liability in connection with the sale of its equipment not expressed in this warranty.
Many types of the manufacturer’s equipment carry an additional one-year service policy.
Consult your sales representative for specific details.
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7-2 Technical Assistance
Parts Department
[
]
[414]
Call toll-free 7am–5pm CST 800 423-3183 or call 354-0970, Fax [414] 354-6421
The ACS Customer Service Group will provide your company with genuine OEM quality parts
manufactured to engineering design specifications, which will maximize your equipment’s performance
and efficiency. To assist in expediting your phone or fax order, please have the model and serial
number of your unit when you contact us. A customer replacement parts list is included in this manual
for your convenience. ACS welcomes inquiries on all your parts needs and is dedicated to providing
excellent customer service.
Service Department
[
]
[
] 3
Call toll-free 8am–5pm CST 800 657-4679 or call 414 54-0970
[
]
Emergencies after 5pm CST, call 847 439-5655
We have a qualified service department ready to help. Service contracts are available for most of our
products.
Sales Department
[414]
Call
354-0970 Monday–Friday, 8am–5pm CST
Our products are sold by a world-wide network of independent sales representatives. Contact our Sales
Department for the name of the sales representative nearest you.
Contract Department
[
]
Call 414 354-0970 Monday–Friday, 8am–5pm CST
Let us install your system. The Contract Department offers any or all of these services: project planning;
system packages including drawings; equipment, labor, and construction materials; and union or non-
union installations.
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7-3 Drawings and Specifications
2 hp and 3 1/2 hp Air-Cooled Portable Chillers
Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal cooling
capacity c in tons
Water
flow
gpm d
4.6
7.9
Com-
pressor
hp
Nominal
pump
hp
Power in amps e,
460/3/60 f
HP
Discharge air
openings cfm g
1 @ 18.5” 1,475
1 @ 18.5” 2,350
no pump
1.9
1 pump
1.7
rated
8.0
running
6.9
2
3.5
2.0
3.5
1.0
1.0
3.3
3.1
10.9
8.8
c Based on 50ºF (10ºC) chilled water supply temperature and 95ºF (35ºC) ambient air. Optional additional process
pump hp (kW) reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
f Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages.
g To convert cfm to cmh, multiply by 1.699.
2 and 3 1/2 hp portable chillers come standard with 2 1/2” (63 mm) swivel casters.
Process
Compressor connections
Dimensions
inches c
width
Weights
Ship. d Oper. d e
Dry d
lbs.
387
hp
2.0
3.5
in. NPT
¾” or 1.0”
1.0”
height
49.7”
49.7”
depth
41.7”
41.7”
lbs.
417
440
lbs.
437
460
22.0”
22.0”
410
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply lbs. by 0.454 to calculate Kg.
e Operating weight is with a full 6-gallon (22.7 liter) reservoir tank of water.
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5 hp and 7.5 hp Air-Cooled Portable Chillers
Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4
gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply
capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained.
Nominal cooling
capacity c in tons
Water Com- Nom.
flow pressor pump Discharge air e
Power in amps f, 460/3/60 g
1 pump 2 pumps
HP
no pump 1 pump 2 pump gpm d
hp
5.0
7.5
hp
1.0
1.0
openings cfm h rated running rated running
5
7.5
4.8
6.6
4.6
6.4
4.5
6.3
11.6
15.7
1 @ 27”
1 @ 27”
3,400 14.0
5,100 18.2
11.0 14.9 11.9
14.6 19.1 15.5
c Based on 50ºF (10ºC) chilled water supply temperature and 95ºF (35ºC) ambient air. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e Customer use of ductwork requires optional high-pressure fan for 5 hp to 15 hp (3.73 kW to 11.20 kW) models.
f An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
g Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages; multiply by 0.8 for 575/3/60 amperages.
h To convert cfm to cmh, multiply by 1.699.
5 hp and 7.5 hp air-cooled chillers come standard with 4” (101 mm) swivel casters.
Com-
pressor
hp
Process connections, in. NPT
no pump, 1 pump, no
Dimensions
in inches c
height width depth
Weights
Dry d Ship. d Oper. d e
1
2
pump Pumps no tank
tank,
lbs.
lbs.
lbs.
to/from
5.0
7.5
1.5/2.0
1.5/2.0
2.0
2.0
1.5”
1.5”
1.5” / 2.0”
1.5” / 2.0”
82.3”
82.3”
34.0”
34.0”
54.7”
54.7”
872
922
1,047
1,097
1,205
1,255
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply lbs. by 0.454 to calculate Kg.
e Operating weight is with a full 20-gallon (76 liter) reservoir tank of water.
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10 hp and 15 hp Air-Cooled Portable Chillers
Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Water Com- Nom.
flow pressor pump Discharge air e
Power in amps f, 460/3/60 g
1 pump 2 pumps
HP
no pump 1 pump 2 pump gpm d
hp
10.0
15.0
hp
2.0
2.0
openings cfm h rated running rated running
10
15
9.9
9.5
9.4
23.8
34.9
2 @ 27”
5,800 26.1
21.8 27.8 23.5
27.5 35.0 29.2
14.5
14.1
14.0
2 @ 27” 10,000 33.3
c Based on 50ºF (10ºC) chilled water supply temperature and 95ºF (35ºC) ambient air. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e Customer use of ductwork requires optional high-pressure fan for 5 hp to 15 hp (3.73 kW to 11.20 kW) models.
f An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
g Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages; multiply by 0.8 for 575/3/60 amperages.
h To convert cfm to cmh, multiply by 1.699.
10 hp and 15 hp air-cooled chillers come standard with 4” (101 mm) swivel casters.
Com-
pressor
hp
Process connections, in. NPT
no pump, 1 pump, no
Dimensions
in inches c
height width depth
Weights
Dry d Ship. d Oper. d e
1
2
Pump pumps no tank
tank,
lbs.
lbs.
lbs.
to/from
10.0
15.0
1.5”/3.0” 2.0”/3.0 1.5”
2.0”/3.0” 2.5”/3.0 2.0”
1.5” / 2.0”
2.0” / 3.0”
82.3”
82.3”
34.0”
34.0”
74.7” 1,305 1,570
74.7” 1,388 1,653
1,637
1,720
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply lbs. by 0.454 to calculate Kg.
e Operating weight is with a full 40-gallon (151 liter) reservoir tank of water.
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20 hp, 25 hp, and 30 hp Air-Cooled Portable Chillers
Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
no pump 1 pump 2 pump gpm d
Water Com- Nom.
flow pressor pump
Power in amps e, 460/3/60 f
1 pump 2 pumps
openings cfm g rated running rated running
HP
Discharge air
hp
hp
5
20
25
30
19.4
23.9
29.2
18.4
22.8
28.2
18.0
22.4
27.8
46.5 2 @ 10
57.2 2 @ 13
70.2 2 @ 15
25” x 18.5” 10,200 48.3 42.0 51.4
25” x 18.5” 13,300 62.1 48.3 65.2
25” x 18.5” 18,150 74.1 64.4 77.2
45.1
51.4
67.5
5
5
c Based on 50ºF (10ºC) chilled water supply temperature and 95ºF (35ºC) ambient air. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
f Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages; multiply by 0.8 for 575/3/60 amperages.
g To convert cfm to cmh, multiply by 1.699.
20 hp, 25 hp, and 30 hp air-cooled portable chillers come standard with 4” (101 mm) swivel casters.
Com-
Process connections, in. NPT
Dimensions
in inches c
Weights
Dry d Ship. d Oper. d e
HP pressor 1 Pump 2 Pump no pump, 1 pump, no
hp
to/from to/from no tank
tank,
height width depth
lbs.
lbs.
lbs.
to/from
20
25
30
2 @ 10 2” / 3” 2.5” / 3”
2 @ 13 2” / 3” 2.5” / 3”
2 @ 15 2” / 3” 2.5” / 3”
2.0”
2.0”
2.0”
2” / 3”
2” / 3”
2” / 3”
91.4
91.4
91.4
34.0
34.0
34.0
100.7 2,305 2,605
100.7 2,348 2,648
100.7 2,610 2,910
2,971
3,014
3,276
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply lbs. by 0.454 to calculate Kg.
e Operating weight is with a full 80-gallon (303 liter) reservoir tank of water.
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2 hp and 3.5 hp Water-Cooled Portable Chillers
Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal
water
flow
gpm d
5.1
Condenser water
Com- Nominal Water flow in gpm
pressor pump conn. Tower City
Nominal cooling
capacity c in tons
no pump 1 pump
Amp draws g
460/3/60 h
HP
hp
2.0
3.5
hp
1.0
1.0
in. NPT water e water f rated running
2
3.5
2.1
3.6
1.9
3.4
1.0”
1.0”
6.2
10.5
4.2
7.2
12.2
16.4
8.3
11.8
8.6
c Based on 50ºF (10ºC) chilled water supply temperature and 85ºF (29ºC) tower water. Optional additional process
pump hp (kW) reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e Based on availability of 85ºF (29ºC) tower water at 25 psi (172.4 kPa/1.7 bars) minimum.
f Based on availability of 70ºF (21ºC) city water at 25 psi (172.4 kPa/1.7 bars) minimum.
g An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
h Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages.
2 hp and 3.5 hp water-cooled portable chillers come standard with 2” (63 mm) swivel casters.
Process
Weights
HP
Compressor connections
Dimensions in inches c
Dry d
lbs.
333
Shipping d Operating d e
hp
2.0
3.5
in. NPT
1.0”
1.0”
height
28.3”
width
22.0”
22.0”
depth
41.7”
41.7”
lbs.
363
392
lbs.
383
412
2
3.5
28.3”
362
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply by 0.454 to calculate Kg.
e Operating weight is with a full 6-gallon (22.7 liter) reservoir tank of water.
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5 hp and 7.5 hp Water-Cooled Portable Chillers
Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Nominal Com-
water pres- Nom. Water flow in gpm
flow sor pump conn. Tower City
pump pump pump gpm d hp hp in. NPTwater ewater f rated running rated running
Condenser water
Power in amps g
460/3/60 h
HP
no
1
2
1 pump
2 pumps
5
7.5
5.2
7.1
5.0
6.9
4.9
6.8
12.6
17.0
5.0
7.5
1.0
1.0
1.0”
1.0”
15.7
21.3
7.9
10.7
12.2
16.4 11.8
8.3
13.1
17.3 12.7
9.2
c Based on 50ºF (10ºC) chilled water supply temperature and 85ºF (29ºC) tower water. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e Based on availability of 85ºF (29ºC) tower water at 25 psi (172.4 kPa/1.7 bars) minimum.
f Based on availability of 70ºF (21ºC) city water at 25 psi (172.4 kPa/1.7 bars) minimum.
g An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
h Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages.
5 hp and 7.5 hp water-cooled chillers come standard with 4” (101 mm) swivel casters.
Com-
pressor
hp
Process connections, in. NPT
no pump, 1 pump, no
pump pumps no tank tank, to/from height width depth
Dimensions
in inches c
Weights
Dry d Ship. d Oper. d e
1
2
lbs.
637
727
lbs.
787
877
lbs.
970
1,060
5.0 1.5”/2.0 2.0”
7.5 1.5”/2.0 2.0”
1.5”
1.5”
1.5” / 2.0”
1.5” / 2.0”
44.0”
44.0”
34.0”
34.0”
54.7”
54.7”
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply by 0.454 to calculate Kg.
e Operating weight is with a full 20-gallon (76 liter) reservoir tank of water.
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10 hp and 15 hp Water-Cooled Portable Chillers
Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Nominal Com-
water pres- Nom. Water flow in gpm
flow sor pump conn. Tower City
pump pump pump gpm d hp hp in. NPTwater ewater f rated running rated running
Condenser water
Power in amps g
460/3/60 h
HP
no
1
2
1 pump
2 pumps
10
15
10.7
15.9
10.3
15.5
10.2
15.3
25.7 10.0 2.0
38.1 15.0 2.0
1.5”
2.0”
32.2
47.6
16.1 22.5
23.8 29.7
16.7
21.6
24.2
31.4
18.4
23.3
c Based on 50ºF (10ºC) chilled water supply temperature and 85ºF (29ºC) tower water. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e Based on availability of 85ºF (29ºC) tower water at 25 psi (172.4 kPa/1.7 bars) minimum.
f Based on availability of 70ºF (21ºC) city water at 25 psi (172.4 kPa/1.7 bars) minimum.
g An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
h Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages.
10 hp and 15 hp water-cooled chillers come standard with 4” (101 mm) swivel casters.
Com-
pressor
hp
Process connections, in. NPT
no pump, 1 pump, no
Dimensions
in inches c
height width Depth
Weights
Dry d Ship. d Oper. d e
1
2
Pump pumps no tank
tank,
lbs.
lbs.
lbs.
to/from
10.0
15.0
1.5”/3.02.0”/3.0
2.0”/3.02.5”/3.0
1.5”
2.0”
1.5” / 2.0”
2.0” / 3.0”
44.0”
44.0”
34.0”
34.0”
74.7”
950 1,175
1,282
1,365
74.7” 1,024 1,249
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply by 0.454 to calculate Kg.
e Operating weight is with a full 40-gallon (151 liter) reservoir tank of water.
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20 hp, 25 hp, and 30 hp Water-Cooled Portable Chillers
Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Nominal Com-
Condenser water
Power in amps g
460/3/60 h
water
flow
pres- Nom. Water flow in gpm
sor pump conn. Tower City
HP
no
1
2
1 pump
2 pumps
pump pump pump gpm d
hp
hp in. NPTwater ewater f rated running rated running
20
25
30
21.0
25.7
31.8
20.0
24.7
30.8
19.6
24.3
30.4
50.4
61.7
76.2
2 @ 10 5.0
2 @ 13 5.0
2 @ 15 5.0
2.0”
2.0”
2.5”
61.7
75.9
93.9
31.5 43.9
38.6 55.9
47.6 60.1
34.7
38.2
45.3
47.0
59.0
63.2
37.8
41.3
48.4
c Based on 50ºF (10ºC) chilled water supply temperature and 85ºF (29ºC) tower water. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e Based on availability of 85ºF (29ºC) tower water at 25 psi (172.4 kPa/1.7 bars) minimum.
f Based on availability of 70ºF (21ºC) city water at 25 psi (172.4 kPa/1.7 bars) minimum.
g An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
h Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages.
20 hp, 25 hp, and 30 hp water-cooled chillers come standard with 4” (101 mm) swivel casters.
Com-
Process connections, in. NPT
Dimensions
in inches c
Weights
Dry d Ship. d Oper. d e
HP pressor 1 pump 2 Pump no pump, 1 pump, no
hp
to/from to/from no tank
tank,
height width depth
lbs.
lbs.
lbs.
to/from
20
25
30
2 @ 10 2” / 3” 2.5” / 3”
2 @ 13 2” / 3” 2.5” / 3”
2 @ 15 2” / 3” 2.5” / 3”
2.0”
2.0”
2.0”
2” / 3”
2” / 3”
2” / 3”
45.3”
45.3”
45.3”
34.0”
34.0”
34.0”
100.7” 1,495 1,745
100.7” 1,680 1,930
100.7” 1,885 2,135
2,161
2,346
2,551
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply by 0.454 to calculate Kg.
e Operating weight is with a full 80-gallon (303 liter) reservoir tank of water.
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35 hp and 40 hp Water-Cooled Portable Chillers
Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton
(9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60
Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Nominal Com-
water pres- Nom. Water flow in gpm
flow sor pump conn. Tower City
pump pump pump gpm d hp hp in. NPTwater ewater f rated running rated running
Condenser water
Power in amps g
460/3/60 h
HP
no
1
2
1 pump
2 pumps
35
40
34.2
41.0
32.7
39.5
32.3
39.1
82.0
98.4
35
40
7.5
7.5
2.5”
2.5”
102.5
123.0
51.3 64.4
61.5 81.9
55.7
63.1
67.5
85.0
58.8
66.2
c Based on 50ºF (10ºC) chilled water supply temperature and 85ºF (29ºC) tower water. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e Based on availability of 85ºF (29ºC) tower water at 25 psi (172.4 kPa/1.7 bars) minimum.
f Based on availability of 70ºF (21ºC) city water at 25 psi (172.4 kPa/1.7 bars) minimum.
g An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
h Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages.
35 hp and 40 hp water-cooled chillers come standard with 4” (101 mm) swivel casters.
Com-
Process connections, in. NPT
Dimensions
in inches c
Weights
Dry d Ship. d Oper. d e
pressor 1 pump 2 Pump no pump, 1 pump, no
hp
to/from to/from no tank
tank,
height width depth
lbs.
lbs.
lbs.
to/from
35
40
2.5” / 3” 2.5” / 3”
2.5” / 3” 2.5” / 3”
2.5”
2.5”
2.5” / 3”
2.5” / 3”
59.9”
59.9”
34.0”
34.0”
100.7” 2,669 2,919
100.7” 2,680 2,930
3,358
3,369
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight. Multiply by 0.454 to calculate Kg.
e Operating weight is with a full 80-gallon (303 liter) reservoir tank of water.
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5 hp and 7.5 hp Remote Air-Cooled Portable Chillers
Nominal operating parameters for remote air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm
per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83.
Nominal 60 Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Nom. Com-
water pres- Nom.
Refrigeration
connections
in. dia. ODS
Power in amps e
460/3/60 f
HP
no
1
2
flow
sor pump
1 pump
2 pumps
pump pump pump gpm d hp
hp
Discharge Liquid rated running rated running
5
4.8
6.6
4.6
6.4
4.5
6.3
11.6
15.7
5.0
7.5
1.0
5
5
12.2
9.2
13.1
10.1
/8”
/8”
/8”
/8”
7.5
1.0
7
5
16.2
12.8
17.3
13.7
c Based on 50ºF (10ºC) chilled water supply temperature and 95ºF (35ºC) ambient air. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
f Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages; multiply by 0.8 for 575/3/60 amperages.
Remote air-cooled portable chillers come standard with mounting rails. Remote air-cooled portable
chillers are charged with 25 psi (172.4 kPa/1.72 bars) nitrogen for shipping purposes.
Com-
pressor
hp
Process connections, in. NPT
no pump, 1 pump, no
Dimensions
in inches c
height width depth
Weights
Dry d Ship. d Oper. d e
1
2
pump pumps no tank
tank,
lbs.
lbs.
lbs.
to/from
5.0
7.5
1.5”
1.5”
2.0”
2.0”
1.5”
1.5”
1.5” / 2.0”
1.5” / 2.0”
40.9”
40.9”
34.0”
34.0”
54.7”
54.7”
597
644
748
794
930
977
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight.
e Operating weight is with a full 20-gallon (76 liter) reservoir tank of water.
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10 hp and 15 hp Remote Air-Cooled Portable Chillers
Nominal operating parameters for remote air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm
per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83.
Nominal 60 Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Nom. Com-
water pres- Nom.
Refrigeration
connections
in. dia. ODS
Power in amps e
460/3/60 f
HP
no
1
2
flow
sor pump
1 pump
2 pumps
pump
9.9
pump
9.5
pump gpm d hp
hp
2.0
Discharge Liquid rated running rated running
10
15
9.4
23.8 10.0
34.9 15.0
1
5
22.5 18.2
24.2
19.9
1 /8”
/8”
/8”
14.5
14.1
14.0
2.0
1
5
29.7 23.9
31.4
25.6
1 /8”
c Based on 50ºF (10ºC) chilled water supply temperature and 95ºF (35ºC) ambient air. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
f Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages; multiply by 0.8 for 575/3/60 amperages.
Remote air-cooled portable chillers come standard with mounting rails. Remote air-cooled portable
chillers are charged with 25 psi (172.4 kPa/1.72 bars) nitrogen for shipping purposes.
Com-
pressor
hp
Process connections, in. NPT
no pump, 1 pump, no
pump pumps no tank tank, to/from height width Depth lbs.
Dimensions
in inches c
Weights
Dry d Ship. d Oper. d e
1
2
lbs.
lbs.
10.0
15.0
1.5”
2.0”
2.0”
2.5”
1.5”
2.0”
1.5” / 2.0”
2.0” / 3.0”
40.9” 34.0” 74.7”
40.9” 34.0” 74.7”
827
870
1,052
1,095
1,159
1,202
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight.
e Operating weight is with a full 40-gallon (151 liter) reservoir tank of water.
2-40 HP Portable Chillers
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20 hp through 40 hp Remote Air-Cooled Portable Chillers
Nominal operating parameters for remote air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm
per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83.
Nominal 60 Hz capacity flow rate must be maintained.
Nominal cooling
capacity c tons
Nom. Com-
water pres- Nom.
Refrigeration
connections
in. dia. ODS
Power in amps e
460/3/60 f
no
1
2
flow
sor
hp
pump
1 pump
2 pumps
HP
pump pump pump gpm d
hp Discharge Liquid rated running rated running
20
19.4
23.8
29.2
30.6
36.9
18.4
22.8
28.2
29.1
35.4
18.0
22.4
27.8
28.7
35.0
46.5 2 @ 10
57.2 2 @ 13
70.2 2 @ 15
5
3
7
7
7
43.9
55.9
60.0
64.4
81.9
37.6
42.1
50.4
60.3
68.8
47.0
59.0
63.2
67.5
85.0
40.7
45.2
53.5
63.4
58.0
1 /8”
/8”
/8”
/8”
25
30
35
40
5
3
1 /8”
5
3
1 /8”
73.5
88.6
35
40
7.5
7.5
5
1
1 /8”
1 /8”
5
1
1 /8”
1 /8”
c Based on 50ºF (10ºC) chilled water supply temperature and 95ºF (35ºC) ambient air. Optional additional process
pump hp reduces chiller capacity by 0.2 tons per hp (0.703 kW ref. cap. per 0.746 kW pump power).
d Based on 2.4 gpm per ton (9.1 lpm per 3.517 kW), nominal 1 pump.
e An optional oversized process pump adds to the total rated or running chiller amperage. To find the new total
chiller amperage, subtract the standard process pump amperage from the optional pump amperage (see Figure 1
on page 16), and add it to the chiller rated or running amperage.
f Multiply 460/3/60 amperage by 2.0 for 208-230/3/60 amperages; multiply by 0.8 for 575/3/60 amperages.
Remote air-cooled portable chillers come standard with mounting rails. Remote air-cooled portable
chillers are charged with 25 psi (172.4 kPa/1.72 bars) nitrogen for shipping purposes.
Com-
HP pressor 1 pump 2 Pump no pump, 1 pump, no
hp
Process connections, in. NPT
Dimensions
in inches c
Weights
Dry d Ship. d Oper. d e
to/from to/from no tank tank, to/from height width depth lbs.
lbs.
lbs.
20
25
30
35
40
2 @ 10 2” / 3” 2.5” / 3”
2 @ 13 2” / 3” 2.5” / 3”
2 @ 15 2” / 3” 2.5” / 3”
2.0”
2.0”
2.0”
2.5”
2.5”
2” / 3”
2” / 3”
2” / 3”
2.5” / 3”
2.5” / 3”
43.3” 34.0” 100.7” 1,299
43.3” 34.0” 100.7” 1,305
43.3” 34.0” 100.7” 1,607
43.3” 34.0” 100.7” 2,235
43.3” 34.0” 100.7” 2,243
1,549
1,555
1,857
2,462
2,470
1,965
1,971
2,273
2,901
2,909
35
40
2.5” / 3” 2.5” / 3”
2.5” / 3” 2.5” / 3”
c To convert to cm, multiply by 2.54. Add to height dimension based on mounting options.
d Weight is for standard chiller. Some optional features will increase weight.
e Operating weight is with a full 80-gallon (303 liter) reservoir tank of water.
2-40 HP Portable Chillers
Chapter 7: Appendix
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Remote Condenser Assembly Models
To convert inches to cm, multiply dimension by 2.54.
Fan(s) d e f
Remote Condenser
Overall Dimensions
Net Length Width Height Mtg. Discharge Liquid
wt.
Refrigeration g
Connections Charge
R-22
Each
Totals e f
Air
HP Dia.
in.
Motor
Amps
flow
hp c
460V Fans cfm h lbs.h ‘A’(in.) ‘B’(in) ‘C’(in.) ‘D’(in) ODS(in.) ODS(in.) lbs. g
5
26 3/4 hp 1 ø
2.4
3.7
3.7
5.0
1
2
2
3
2
2
3
3
4
6,450 260
12,400 470
13,700 510
20,500 550
23,000 840
21,900 860
49.8
69.8
43.0
43.0
43.0
43.0
45.5
45.5
45.5
45.5
45.5
40.5
40.5
40.5
40.5
50.0
50.0
50.0
50.0
50.0
40.0
60.0
80.0
120.0
108.0
108.0
i
1
7
7
3.6
3.6
1 /8
/8
7.5 26
1
1
1
1
/3 hp 3 ø
/3 hp 3 ø
/3 hp 3 ø
1 /8
/8
10
15
20
25
30
35
40
26
26
89.8
3
1
4.6
1 /8
1 /8
129.8
125.0
125.0
5
1
6.4
1 /8
1 /8
30 1 1/2 hp 3 ø 5.9
30 1 1/2 hp 3 ø 5.9
30 1 1/2 hp 3 ø 9.4
30 1 1/2 hp 3 ø 9.4
30 1 1/2 hp 3 ø 12.9
5
5
10.0
16.0
24.0
24.0
29.0
1 /8
1 /8
5
5
1 /8
1 /8
34,800 1,280 180.0
32,900 1,300 180.0
46,400 1,690 235.0
1
1
2 /8
2 /8
i
1
1
2 /8
2 /8
i
1
1
2 /8
2 /8
c ø represents electrical phase; all motors are 1,140 rpm. Multiply hp by 0.746 to convert to kW.
d All first fan motors (Header Side) are ¾ hp (0.56 kW) single phase variable speed.
e Multiply 460V amperages by 2.0 for 208-230V amperages.
f Multiply 460 V amperages by 0.8 for 575 V amperages.
g Refrigeration charge is for remote condenser only!
h To convert cfm to cmh, multiply by 1.699. To convert lbs. to Kg, multiply by 0.454.
i See drawing above.
2-40 HP Portable Chillers
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Water Pressure Drop Tables
Note:
A recirculation pump is required for flows greater than the
maximum or less than the minimum indicated.
Note:
Process flow less than or greater than the flow rates shown below
requires a recirculation pump.
Pressure drops in ∆P, psig and kPa
2 HP
3.5 HP
5 HP
7.5 HP
Flow
gpm lpm
4.06 15.4
6.01 22.8
∆ P
psig
3.5
Flow
gpm lpm
8.03 30.4
∆ P
psig
4.0
Flow
gpm lpm
∆ P
Flow
gpm lpm
∆ P
kPa
24.1
kPa
27.6
44.8
69.
psig
1.5
2.2
4.7
7.3
kPa
10.5
14.8
32.1
50.2
psig
2.3
2.9
5.0
6.9
9.6
kPa
16.1
20.1
34.5
47.4
65.9
87.8
10.0
12.0
18.0
24.0
37.9
45.4
68.1
90.8
12.0
16.0
20.0
24.0
45.4
60.6
75.7
90.8
7.0
48.3 10.00 37.9
79.3 12.00 45.4 10.0
6.5
8.02 30.4 11.5
10.00 37.9 18.0 124.1 14.00 53.0 13.0
89.6
16.00 60.6 18.0 124.1
28.0 106.0
33.0 124.9 12.7
10 HP
15 HP
20 HP
25 HP
Flow
Flow
gpm lpm
22.0
83.3
30.0 113.6
∆ P
Flow
gpm lpm
30.0 113.6
40.0 151.4
∆ P
Flow
gpm
∆ P
∆ P
psig
4.7
8.28 57.1
kPa
32.6
psig
4.5
7.5
kPa
31.3
51.7
85.2
lpm
psig
4.0
4.0
5.0
6.0
6.5
kPa
27.6
27.6
34.5
41.4
44.8
gpm
lpm
psig
5.5
5.8
6.0
8.5
kPa
37.9
40.0
41.4
58.6
40.0 151.4
45.0 170.3
50.0 189.3
52.0 196.8
55.0 208.2
55.0 208.2
58.0 219.5
61.0 230.9
70.0 264.9
38.0 143.8 12.91 89.0
46.0 174.1 16.77 115.6
50.0 189.3 20.00 137.9
30 HP
50.0 189.3 12.4
60.0 227.1 17.8 122.8
70.0 264.9 24.2 166.6
35 HP
40 HP
Flow
gpm lpm
72.0 272.5
75.0 283.9
80.0 302.8
85.0 321.7
∆ P
Flow
gpm lpm
∆ P
Flow
gpm lpm
92.6 350.5
∆ P
psig
Flow
gpm lpm
44.7 169.2
58.5 221.4
70.9 268.3
81.6 308.8
∆ P
psig
6.0
6.5
8.0
9.5
kPa
41.1
44.8
55.2
65.5
psig
1.5
2.6
3.8
4.9
6.5
kPa
10.4
kPa
54.5
71.7
psig
2.0
3.4
4.9
6.3
kPa
13.8
23.4
33.8
43.5
71.0
38.7 146.5
51.2 193.8
62.3 235.8
71.8 271.7
82.9 313.7
7.9
17.9 107.1 405.4 10.4
26.2
33.8
44.8
105.7 400.0 10.3
Note:
These pressure drop values are valid for single- and no-pump
portable chillers.
Calculating Chiller Nominal Flow and Pressure to Process
• Flow rate: Obtain the flow reading from the appropriate pump curve.
• Pressure: Obtain a corresponding pressure reading from the pump curve you selected,
then subtract the one-pump pressure drop listed in the above table using the
appropriate chiller hp and flow rate.
• For two-pump (Process/Recirc) chillers, do not subtract pressure drop from table above
for process pump.
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Flow and Pressure Considerations
Modelc
-A, 2 hp
Design flow
Design ∆ P
psig
Standard pump power
To Process pressure
gpm
lpm
17.5
29.9
43.8
59.6
90.1
kPa
30.4
33.7
13.7
19.0
35.2
41.8
49.0
55.9
72.4
37.2
56.5
hp
1
1
1
1
2
2
5
kW
psi
kPa
bars
4.6
7.9
11.6
15.7
23.8
4.4
4.9
2.0
2.8
5.1
6.1
7.1
8.1
10.5
5.4
8.2
0.746
0.746
0.746
0.746
1.492
1.492
3.73
34.1
33.0
34.9
32.7
43.4
38.0
54.0
52.0
47.5
64.0
55.0
235.3
227.5
240.8
225.7
299.0
262.1
372.3
358.5
327.5
441.3
379.2
2.4
2.3
2.4
2.3
3.0
2.6
3.7
3.6
3.3
4.4
3.8
-A, 3.5 hp
-A, -R, 5 hp
-A, -R, 7.5 hp
-A, -R, 10 hp
-A, -R, 15 hp
-A, -R, 20 hp
-A, -R, 25 hp
-A, -R, 30 hp
-R 35 hp
34.9 132.1
46.5 175.9
57.2 216.4
70.2 265.6
73.5 278.2
88.6 335.4
5
3.73
5
3.73
7.5
7.5
5.59
5.59
-R 40 hp
-W 2 hp
-W 3.5 hp
-W 5 hp
5.1
8.6
12.6
17.0
25.7
38.1 144.1
50.4 190.8
61.7 233.7
76.2 288.5
82.0 310.4
98.4 372.4
19.1
32.7
47.7
64.5
97.4
5.7
6.0
2.3
3.1
6.3
7.0
8.8
9.0
10.8
5.4
8.2
39.1
41.2
16.00
21.4
43.3
48.1
60.3
62.1
74.1
37.2
56.5
1
1
1
1
2
2
5
5
5
0.746
0.746
0.746
0.746
1.492
1.492
3.73
3.73
3.73
5.59
5.59
32.9
31.7
34.3
32.0
41.4
35.5
52.0
49.0
43.0
64.0
55.0
226.6
218.5
236.2
220.3
285.3
244.4
358.5
337.9
296.5
441.3
379.2
2.3
2.2
2.4
2.2
2.9
2.4
3.6
3.4
3.0
4.4
3.8
-W 7.5 hp
-W 10 hp
-W 15 hp
-W 20 hp
-W 25 hp
-W 30 hp
-W 35 hp
-W 40 hp
7.5
7.5
c -A – Air-cooled; -W – Water-cooled; -R – Remote Air-cooled.
Note:
Pressure is proportional to flow. Recirculation pump is required
for values exceeding those listed.
Recirculation Pump Specifications
HP
Recirc. power
Flow Rate
∆ pressure
hp
kW
gpm
13.0
17.0
26.0
38.0
50.0
63.0
76.0
82.0
98.0
lpm
49.2
psi
2.3
3.1
6.3
7.0
8.8
9.0
10.8
5.4
8.2
kPa
5
0.75
0.75
0.75
0.75
2.0
2.0
2.0
0.373
0.373
0.595
0.595
1.492
1.492
1.492
2.238
2.238
16.0
21.4
43.3
48.0
60.3
62.0
74.1
37.2
56.5
7.5
10
15
20
25
30
35
40
64.3
98.4
143.8
189.2
238.4
287.6
310.4
370.9
3.0
3.0
2-40 HP Portable Chillers
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7-5 Remote Air-Cooled Chiller Configurations
Configuration A:
*Liquid line riser should not exceed 15 feet from base of air-cooled condenser.
Configuration B:
Configuration C:
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7-6 Typical Ductwork for Air-Cooled Chillers
*See specification tables on pages 45-48 for air flow and pressure capacities.
When locating your air-cooled portable chiller and designing its ductwork, note any potential high
temperature conditions when discharging into your building and any negative pressures with the building
when discharging air outside.
Notes: • Customer use of ductwork requires the high pressure fan option for models 5 through 15 hp. •
Allow 30” (77 cm) minimum clearance around the chiller footprint to facilitate free passage of cooling air
and service accessibility • Size the ductwork for maximum capacity • Support ductwork from the
building structure, not off of the chiller • Back draft damper to outside must be closed at all times when
fan/blower is not operating • Chillers with dual fans/blower must have a back draft damper on the cycling
fan/blower to prevent recirculation of hot discharge air • Chillers are designed to operate at a condensing
entering air temperature of 60ºF (16ºC) minimum • Maximum total static pressure drop external to the
chiller must not exceed 0.30” WG (75 pa)
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7-7 Piping Diagrams
Central and Gravity Return Piping with Standpipe Diagram
2-40 HP Portable Chillers
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Typical Piping Schematic, 2 and 3 1/2 hp Models
2-40 HP Portable Chillers
Chapter 7: Appendix
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Typical Piping Schematic, 5 hp through 40 hp, One-Pump Models
2-40 HP Portable Chillers
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Typical Piping Schematic, 5 hp through 40 hp, Two-Pump Models
2-40 HP Portable Chillers
Chapter 7: Appendix
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Typical Piping Schematic, 5 hp through 40 hp, No-Pump Models
2-40 HP Portable Chillers
Chapter 7: Appendix
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Typical Piping Schematic, 5 hp through 40 hp, One-Pump Models
2-40 HP Portable Chillers
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7-8 Electrical Schematics
Typical Electrical Subpanel
Time-delay Relays
Relays
Disconnect Switch
Optional
Fan Motor
Speed
Fuses
Control
Control
High/Low
Transformer
T’stat
Compressor, Pump, and Fan Motor Fuses
Compressor, Pump, and Fan Motor Starters
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Typical Electrical Schematic, 2 hp and 3 1/2 hp Models
2-40 HP Portable Chillers
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Typical Power Wiring Schematic, 5 hp through 40 hp Models
1DISC
1DB
3FU
4FU
5FU
6FU
6FU
7FU
8FU
9FU
9FU
1C
1M
2M
2C
3M
4M
5M
3C
1L1
1L2
1L3
1L1
1L2
1L3
1L1
1L2
1L3
1L1
1L2
1L3
1L1
1L2
1L3
1L1
1L2
3L1
3L2
3L3
4L1
4L2
4L3
5L1
5L2
5L3
6L1
6L2
1T1
1T2
1T3
2T1
2T2
2T3
3T1
3T2
3T3
COMPRESSOR INTERNALLY
THERMAL PROTECTED
1MTR
2MTR
3MTR
COMPRESSOR ________ HP
FLA ________
1OL
2OL
FUSE SIZE ________
GROUNDING BAR
PUMP RECIRC. ________ HP
PANEL
GROUND
FLA ________
FUSE SIZE ________
OVERCURRENT PROTECTION
BY OTHERS PROTECTED PER
N.E.C.
PUMP PROC. ________ HP
FLA ________
FUSE SIZE ________
4T4
4T2
4T1
4T2
L1
M1
4PS-1
FAN MOTOR INTERNALLY
THERMAL PROTECTED
R
R
LOW AMBIENT
AIR COOLED
U
N
4MTR
C
FAN # 1 ________ HP
T
R
A
T
S
S
FLA ________
CAPACITOR
3OL
3OL
5OL
FUSE SIZE ________
1L1
1L2
1L3
1L1
1L2
1L3
1L1
1L2
1L3
1L1
6L1
6L2
6L3
7L1
7L2
7L3
8L1
8L2
8L3
9L1
4T1
4T2
4T3
5T1
5T2
5T3
6T1
6T2
6T3
1H1
4MTR
5MTR
6MTR
FAN #1 ________ HP
STANDARD AND
HIGH PRESSURE
AIR COOLED
FLA ________
FUSE SIZE ________
FAN #2 ________ HP
FLA ________
FUSE SIZE ________
LOCATED OUTSIDE
OF ENCLOSURE
PUMP TEMP. ________ HP
FLA _____
COMPONENT
FUSE SIZE _____
WIRING BY OTHERS
OPTIONAL FEATURE
PROCESS
HEATER
1HTR
3C
3C
1L3
1L1
1L2
1L3
9L3
9L1
9L2
9L3
1H3
1H1
1H2
1H3
FLA ________
FUSE SIZE _____
FUSE SIZE ________
1FU
2L1
2FU
1HTR
PROCESS HEATER
FLA ________
2FU
FUSE SIZE ________
A0554815
2L3
X1
2
FUSE SIZE ________
2-40 HP Portable Chillers
Chapter 7: Appendix
72 of 78
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Typical Wiring Schematic, 5 hp through 15 hp Models with Pump
2-40 HP Portable Chillers
Chapter 7: Appendix
73 of 78
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Typical Wiring Schematic, 5 hp through 15 hp Models without Pump
DWG: A0554931
2-40 HP Portable Chillers
Chapter 7: Appendix
74 of 78
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Typical Wiring Schematic, 20 hp through 30 hp Models with Pump
DWG: A0562343
2-40 HP Portable Chillers
Chapter 7: Appendix
75 of 78
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Typical Wiring Schematic, 20 hp through 30 hp Models without Pump
DWG: A0562435
2-40 HP Portable Chillers
Chapter 7: Appendix
76 of 78
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Typical Wiring Schematic, 35 hp and 40 hp Models with Pump
2-40 HP Portable Chillers
Chapter 7: Appendix
77 of 78
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Typical Wiring Schematic, 35 hp and 40 hp Models without Pump
DWG: A0562434
2-40 HP Portable Chillers
Chapter 7: Appendix
78 of 78
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