Part #470658
MSX
Make-Up Air Unit
®
Installation, Operation and Maintenance Manual
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the
product described. Protect yourself and others by observing all safety information. Failure to comply with instructions
could result in personal injury and/or property damage! Retain instructions for future reference.
2. The rotation of the wheel is critical. It must be free
to rotate without striking or rubbing any stationary
objects.
3. Motor must be securely and adequately grounded.
4. Do not spin fan wheel faster than maximum
cataloged fan rpm. Adjustments to fan speed
significantly effects motor load. If the fan RPM is
changed, the motor current should be checked to
make sure it is not exceeding the motor nameplate
amps.
5. Do not allow the power cable to kink or come in
contact with oil, grease, hot surfaces, or chemicals.
Replace cord immediately if damaged.
6. Verify that the power source is compatible with the
equipment.
7. Never open blower access doors while the fan is
running.
IMPORTANT
General Safety Information
All factory provided lifting lugs must be used when
Only qualified personnel should install this unit.
lifting any unit. Failure to comply with this safety
Personnel should have a clear understanding of these
precaution could result in property damage, serious
instructions and should be aware of general safety
injury or death.
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards.
WARNING
Disconnect all electrical power to the fan and secure
to the “OFF” position prior to inspection or servicing.
Failure to comply with this safety precaution could
result in serious injury or death.
Other considerations may be required if high winds
or seismic activity are present. If more information
is needed, contact a licensed professional engineer
before moving forward.
1. Follow all local electrical and safety codes, as well
as the National Electrical Code (NEC), the National
Fire Protection Agency (NFPA), where applicable.
Follow the Canadian Electric Code (CEC) in
Canada.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage,
injury or death. Read the installation, operating
and maintenance instructions thoroughly before
installing or servicing this equipment.
DANGER
Always disconnect power before working on or
near a unit. Lock and tag the disconnect switch or
breaker to prevent accidental power up.
CAUTION
When servicing the unit, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.
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Table of Contents
Installation of Indoor Unit
Installation
1. Install Hangers
Clearance to Combustibles/Service Clearances. 3
Indoor Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unit Arrangement DB / HZ / UB. . . . . . . . . . . . . . 4
Roof Mounted Unit — Arrangement DBC . . . . .5-6
Optional Evaporative Cooling Module. . . . . . . . . 7
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Optional Electrical Heater. . . . . . . . . . . . . . . . . . . 9
Optional Evaporative Cooling Piping. . . . . . .10-11
Optional Water Wizard™ . . . . . . . . . . . . . . . . . . 12
Optional Direct Expansion (DX) Coil Piping. .13-14
Optional Chilled Water Coil Piping. . . . . . . . . . . 14
Optional Building Pressure Control . . . . . . . . . . 15
Start-Up
Install threaded hangers from ceiling supports. When
locating hangers, allow enough room to open access
panel(s). Two nuts must be used on the end of each
threaded hanger. Ceiling supports are supplied by
others.
2. Install Unit
Using sheet metal screws, attach the weatherhood/
thru-wall/filter section to the blower/burner section.
The flange on the weatherhood/thru-wall/filter section
should overlap the flange on the blower/burner section.
Raise the assembled unit into place.
Using two nuts per hanger, fasten the unit supports to
the hangers under the unit. Appropriate unit supports,
such as the optional Greenheck hanging bracket kit or
c-channel and angle iron (supplied by others) should be
used.
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-17
Optional Electric Heater . . . . . . . . . . . . . . . . . . . 18
Optional Evaporative Cooling Recirculating . . . 19
Optional Water Wizard™ . . . . . . . . . . . . . . . .20-21
Operation
Optional VAV Units . . . . . . . . . . . . . . . . . . . . . . . 22
Optional Recirculating Units. . . . . . . . . . . . . . . . 23
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Optional Water Wizard™ . . . . . . . . . . . . . . . . . . 25
Troubleshooting
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Motor Overamps . . . . . . . . . . . . . . . . . . . . . . . . . 27
Insufficient / Too Much Airflow. . . . . . . . . . . . . . 28
Excessive Noise or Vibration . . . . . . . . . . . . . . . 29
Optional Electric Heater . . . . . . . . . . . . . . . . . . . 30
Optional Evaporative Cooling. . . . . . . . . . . . . . . 31
Optional Water Wizard™ . . . . . . . . . . . . . . . . . . 32
Maintenance
Ceiling Supports
Ductwork
Using self
tapping
screws,
attach
ductwork to
unit.
In order to
prevent the
unit from
swinging
and to
Hangers
Unit Supports
provide
a safe
Indoor Mounting
Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33-35
Fall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Reference
Control Center Layout / Dirty Filter Switch . . . . 37
Start-Up Check List . . . . . . . . . . . . . . . . . . . . . . 38
Maintenance Log . . . . . . . . . . . . . . . . . . . . . . . . 39
Warranty . . . . . . . . . . . . . . . . . . . . . . . . .Backcover
environment for service and maintenance, additional
measures must be taken to secure the unit in all
directions.
NOTE
Two nuts must be used on each end of each
threaded hanging rod for proper support.
Clearance to Combustibles /
Service Clearances
NOTE
Good duct practices should be followed for
all ductwork. Ductwork should be installed in
accordance with SMACNA and AMCA guidelines,
NFPA 96 and any local codes. Reference the CAPS
submittal for duct sizes.
Floor
Top
Sides
Ends
0 inches
(0 mm)
0 inches
(0 mm)
0 inches
(0 mm)
0 inches
(0 mm)
Insulated/
Units
Non Insulated
Units
0 inches
(0 mm)
6 inches
6 inches
6 inches
(152.4 mm) (152.4 mm) (152.4 mm)
Clearance to combustibles is defined as the minimum distance
required between the heater and adjacent combustible surfaces to
ensure the adjacent surface’s temperature does not exceed 90 degrees
above the ambient temperature.
3. Seal Wall Opening
Apply sealant around
the perimeter of the
Sealant
weatherhood to prevent
water penetration and
drafts into the building.
Recommended Minimum Service Clearances
42 inches (1066.8 mm)
Housing 32 and less
on the controls side of the unit
48 inches (1219.2 mm)
on the controls side of the unit
Housing 35 and higher
Clearances for component removal (such as evaporative cooler media)
may be greater than the service clearances listed.
Seal Wall Opening
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Installation of
NOTE
Arrangement DB/HZ/UB
The use of all lifting lugs and a set of spreader bars
is mandatory when lifting the unit.
1. Install Curb and/or Equipment
Support(s)
NOTE
Position curb/equipment support(s) on the roof
(reference the CAPS submittal for placement of curb/
equipment support(s) in relation to the unit). Verify
that unit supports are level, shim if necessary. Attach
curb to roof and flash into place. Attach the equipment
support(s) to the roof, remove metal cover, flash to
wooden nailer and reinstall cover.
Some units come with the weatherhood attached
and Step 5 may not apply.
5. Assemble and Attach Weatherhood
The weatherhood can now be assembled and
attached to the unit. Detailed assembly instructions
can be found with the weatherhood. If the optional
evaporative cooling module was selected, this step
does not apply, refer to the Installation of the Optional
Evaporative Cooling Module section, page 7.
Roof Curb
Metal Cover
6. Seal Weatherhood Seam
Using an appropriate sealant, seal the seam between
the weatherhood and the unit.
Equipment
Support
Roof Curb and Equipment Support
2. Install Ductwork
Good duct practices should be followed for all ductwork.
All ductwork should be installed in accordance with
SMACNA and AMCA guidelines, NFPA 96 and all local
codes. Reference the CAPS submittal for ductwork sizes.
NOTE
Complete Rooftop Installation
The use of a duct adapter is recommended on a
downblast (DB) arrangement to align the ductwork
with the supply unit. The duct adapter is only a
guide and is not to be used as a support for the
ductwork.
3. Apply Sealant
Apply an appropriate sealant around the perimeter of
the curb
Supply Air Ductwork
and duct
adapter(s)
to isolate
fan
(Arrangement DB only)
vibration
and prevent
water
Sealant
Ductwork
penetration.
4. Install Unit
Use a crane and a
set of spreader bars
hooked to the factory
lifting lugs to lift and
center the unit on
the curb/equipment
support(s).
Use self-tapping
sheet metal screws
to fasten the unit to
the curb/equipment
support(s).
Setting Unit
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4. Apply Sealant
Installation of Roof Mounted Unit
Arrangement DBC
Apply an appropriate sealant around the perimeter of
the curb and duct adapter(s) to isolate fan vibration
and prevent water penetration.
1. Install Curb/Equipment Support(s)
Position curb/equipment support(s) on the roof
(reference the CAPS submittal for placement of curb/
equipment support(s) in relation to the unit). Verify
that all unit supports are level, shim if necessary.
Attach curb to roof and flash into place. Attach the
equipment support(s) to the roof, remove metal cover,
flash to wooden nailer and reinstall cover.
Exhaust Duct
Installed
Sealant
Supply Duct with
Duct Adapter Installed
Roof Curb
Sealing Ductwork
Metal Cover
5. Install Exhaust Fan
Fasten exhaust fan to curb extension with self-
tapping sheet metal screws. Installing the exhaust fan
prior to the supply unit will allow for easier installation
of options.
Equipment
Support
Roof Curb and Equipment Support
Model CUBE
Exhaust Fan
2. Install Combination Extension
Install combination extension over curb. Lag into
place using wood screws. Locate the extension so the
tall vented side is over the
exhaust opening.
Exhaust
1 inch
Inside Flange
Supply
Installing Exhaust Fan
NOTE
Combination Extension
NFPA 96 requires the exhaust fan to be hinged.
3. Install Ductwork
Good duct practices should be followed for all
ductwork. All ductwork should be installed in
accordance with SMACNA and AMCA guidelines,
NFPA 96 and any local codes. Reference the CAPS
submittal for ductwork size and location.
6. Install Exhaust Options
Install optional Greenheck hinge kit with restraining
cables and grease trap with drain connection.
Exhaust
Ductwork
by Others
Supply
Ductwork
by Others
Ductwork
NOTE
The use of a duct adapter is recommended on a
downblast (DBC) arrangement to align the ductwork
with the supply unit. The duct adapter is only a guide
and is not to be used as a support for the ductwork.
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7. Install Supply Unit
Use a crane and a set of spreader bars hooked to the
factory lifting lugs to lift and center the unit on the
extension/equipment support(s).
Use self-tapping sheet metal screws to fasten the unit
to the extension/equipment support(s).
Installing Supply Unit
NOTE
The use of all lifting lugs and a set of spreader bars
is mandatory when lifting unit.
NOTE
Some units come with the weatherhood attached
and Step 8 may not apply.
8. Assemble and Attach Weatherhood
The weatherhood can now be assembled and/or
attached to the unit. Detailed assembly instructions
can be found with the weatherhood. If the optional
evaporative cooling module was selected, this step
does not apply, refer to the next section, Installation of
the Optional Evaporative Cooling Module.
9. Seal Weatherhood Seam
Using an appropriate sealant, seal the seam between
the weatherhood and the unit.
Complete Combination Installation
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4. Secure Cooling Module to Unit
Installation of Evaporative Cooling
Module (optional)
Use self-tapping screws to fasten the cooling module to
the base unit along the top and down both sides. Fasten
at the top through the flanges. To fasten the sides, the
media must be removed. To remove the media, first
remove the access panel on the evaporative module
and disconnect the evaporative pump(s). The media
will now slide out. With the media removed, you can
access the side fastening points inside the evaporative
module. With all the screws in place, reinstall the media,
reconnect the pumps and reinstall the access panel.
NOTE
Small evaporative coolers ship attached to the base
unit and require no additional mounting.
1. Locate Equipment Support(s)
Position equipment support(s) on the roof (reference the
CAPS submittal for placement of equipment support(s)
in relation to the
Metal Cover
unit). Verify that
all unit supports
are level, shim if
necessary. Attach
equipment support
to the roof, remove
Equipment
Support
metal cover, flash
to wooden nailer
and reinstall cover.
Equipment Support
2. Apply Sealant
Apply an appropriate sealant around the airstream
opening to create an air tight seal.
Securing Evaporative Module
NOTE
When mounting the evaporative cooler, it is
important that it is level to ensure proper operation
and water drainage.
Sealant
3. Set Evaporative Cooling Module
Use a crane and a set of spreader bars hooked to the
factory lifting lugs to lift and center the module on the
equipment support(s). The flange on the evaporative
cooler should overlap the flange on the unit.
Placing Evaporative Module
NOTE
The use of all lifting lugs and a set of spreader bars is
mandatory when lifting the evaporative cooling module.
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®
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1. Determine the Size of the Main Power
Lines
Installation of Electrical Wiring
The unit’s nameplate states the voltage and the unit’s
MCA. The main power lines to the unit should be sized
accordingly. The nameplate is located on the outside
of the unit on the control panel side.
IMPORTANT
Before connecting power to the unit, read and
understand the following instructions and wiring
diagrams. Complete wiring diagrams are attached
on the inside of the control center door(s).
Voltage, Hertz, Phase
IMPORTANT
VOLTS
HZ
EXH HP
MOP
PH
All wiring should be done in accordance with the
latest edition of the National Electric Code ANSI/
NFPA 70 and any local codes that may apply. In
Canada, wiring should be done in accordance with
the Canadian Electrical Code.
SUP HP
MCA
IMPORTANT
Unit’s Total MCA
The equipment must be properly grounded. Any
wiring running through the unit in the airstream must
be protected by metal conduit, metal clad cable or
raceways.
Electrical Nameplate
2. Provide the Opening(s) for the
Electrical Connections
Electrical openings vary by unit size and arrangement
and are field supplied.
CAUTION
If replacement wire is required, it must have a
temperature rating of at least 105°C, except for an
energy cut-off or sensor lead wire which must be
rated to 150°C.
3. Connect the Main Power
Connect the main power lines to the disconnect switch
and main grounding lug(s). Torque field connections to
20 in.-lbs.
DANGER
4. Wire the Optional Convenience Outlet
The convenience outlet requires a separate 115 volt
power supply circuit. The circuit must include short
circuit protection which may need to be supplied by
others.
High voltage electrical input is needed for this
equipment. This work should be performed by a
qualified electrician.
CAUTION
Any wiring deviations may result in personal injury
or property damage. Greenheck is not responsible
for any damage to, or failure of the unit caused by
incorrect final wiring.
5. Wire the Optional Accessories
Reference the Ladder Diagram on the inside of the
control center door for correct wiring of the following
accessories:
IMPORTANT
• Blower Switch
• Heat Switch
• TSCP
• KSCP
Greenheck’s standard control voltage is 24 VAC.
Control wire resistance should not exceed
• Indicating Lights
• Dirty Filter Indicator
0.75 ohms (approximately 285 feet total length for
14 gauge wire; 455 feet total length for 12 gauge
wire). If the resistance exceeds 0.75 ohms, an
industrial-style plug-in relay should be wired in
place of the remote switch. The relay must be
rated for at least 5 amps and have a 24 VAC coil.
Failure to comply with these guidelines may cause
motor starters to chatter or not pull in, resulting in
contactor failures and/or motor failures.
NOTE
TSCP has number-to-number wiring.
6. Wire the Optional Evaporative Cooler
Reference the Ladder Diagram on the inside of the
control center door for correct wiring of the pump and
the optional auto-drain and flush.
NOTE
Large evaporative coolers may require a separate
power supply.
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Sizing of Supply Conductors
Installation of Electric Heater
(optional)
The required minimum size of supply conductors
is marked at the field wiring terminals within the
heater control box or reference the Supply Wire Size
table included in this section. The wire gauges are
calculated for 125% of the heater line current as
required by the National Electric Code, Article 424-3(b)
based on conductor insulation rated for 75°C (167°F).
WARNING
Electrical Shock Hazard! Disconnect all power
sources before doing any work on the unit.
General:
Supply Wire Size
The requirements and practices described below
are based on the National Electric Code (NEC) and
The Space Heating Standard of the Underwriters
Laboratories Inc. (UL). Although UL requirements
are uniform throughout the country, local electrical
codes may deviate from the National Electrical Code.
Therefore, local inspection authorities should be
consulted regarding local requirements.
(Not more than six conductors in Single Conduit1)
Max. Heater
Max. Heater
AWG or
MCM
AWG or
MCM
Line Current2
Line Current2
Copper3
Copper3
14
12
10
8
12
0000
250
300
350
400
500
600
700
750
800
900
1000
184
16
204
24
228
Electrical Wiring Instructions:
1. Use the wiring diagram supplied with the heater
as a guide in correlating field wiring with the
heater internal wiring.
2. All field wiring to the heater must meet the
requirements of the National Electric Code and
any other applicable local or state codes.
3. Wiring to the heater must be rated for 75°C
(167°F) minimum.
4. The fan is interlocked by the factory to the
control circuit so the electric heater will not
operate unless the fan is on.
36
248
6
52
268
4
68
304
3
80
336
2
92
368
1
104
120
140
160
380
0
392
00
000
416
436
1
2
For 7-24 conductors in raceway or cable, reduce allowable
heater line currents to 87½% of those shown above.
5. If heater does not have a built-in disconnect
switch or main circuit breaker, install a remote
disconnect (furnished by others) in accordance
with the National Electric Code, Article 424-65.
Based on 30°C. (86°F.) ambient temperature, for higher
ambient temperature see National Electric Code table
310-16 and 310-18 Note 13.
Calculation of Line Currents (amps):
watts
Single Phase Current =
volts
3
Based on 80% of ratings in the National Electric Code
table 310-16 for 75°C insulation.
Effect of Low Voltage on Wattage and
British Thermal Unit (BTU)
The heating elements may be used on voltages
lower than the design voltage of the heater, however,
the wattage and BTU output will be reduced to the
percentages listed in the table below.
EXAMPLE: 5 kW, 208 volt
5000 watts
= 24 amps
208 volts
watts
Three Phase Current =
volts x 1.73
EXAMPLE: 14.4 kW, 208 volt
De-rated Wattage For Low Voltage
14400 watts
14400
360
=
= 40 amps
% of
% of
208 volts x 1.73
Heater Line
Heater Heater Line
Heater
Voltage Voltage Wattage Voltage Voltage Wattage
and BTU
and BTU
480
277
240
460
440
265
254
230
220
208
200
92
84
92
84
92
84
75
69
208
120
200
190
115
110
92
83
92
84
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®
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Installation Evaporative Cooler
Piping (optional)
Evaporative Cooling with Auto Drain and Fill
Evaporative Cooling with Recirculating Pump
Supply
Line
Supply
Line
Sump Overflow
VALVE A
Supply Solenoid
(Normally Closed)
Supply
Line Valve
(Normally
Closed)
Sump Drain
Drain Line Valve
(Normally Open)
Overflow
VALVE C
Sump Drain Solenoid
(Normally Open)
Drain Line
Trap
VALVE B
Supply Line Drain Solenoid
(Normally Open)
Trap
Drain Line
Recirculating Evaporative Piping
IMPORTANT
Auto Drain & Fill Evaporative Piping
IMPORTANT
All supply solenoids, valves and all traps must be below
the roof line or be otherwise protected from freezing.
The supply line should be of adequate size and
pressure to resupply the amount of water lost due to
bleed-off and evaporation. The drain line should be
the same size or larger than the supply line.
IMPORTANT
The supply line should be of adequate size and
pressure to resupply the amount of water lost due to
bleed-off and evaporation. The drain line should be
the same size or larger than the supply line.
CAUTION
All solenoids valves and traps must be installed below
the roof to protect the supply water line from freezing.
If they cannot be installed below the roof, an alternative
method must be used to protect the lines from freezing.
CAUTION
Provisions must be taken to prevent damage to the
evaporative cooling section during freezing conditions.
The sump, drain lines and supply lines must be
drained prior to freezing conditions or an alternate
method must be used to protect the lines and media.
IMPORTANT
The supply solenoid (Valve A) is NOT the same as
the drain solenoids (Valve B and Valve C). Make sure
to use the proper solenoid for each location. Check
your local code requirements for proper installation
of this type of system.
1. Install the Water Supply Line
Supply line opening requirements vary by unit size
and arrangement and are field supplied. Connect the
water supply line to the float valve through the supply
line opening in the evaporative cooling unit. Install a
manual shutoff valve in the supply line as shown.
Auto Drain & Flush Valves
(When provided by Greenheck)
2. Install the Drain Line
GFC
Part
Number Number
ASCO
Part
Assembly
Number
Solenoid De-Energized
Diameter Qty.
Connect an unobstructed drain line to the drain and
overflow connections on the evaporative cooler. A
manual shut off valve (by others) is required for the
evaporative cooler
Type
Position
1/2 inch
1
461262 8210G2 Supply
Supply
852178 461263 8262G262 Line
Drain
Closed
(12.7 mm)
drain line.
1/4 inch
1
A trap should be
used to prevent
sewer gas from
Open
Open
(6.35 mm)
6 in. min.
Sump
461264 8210G35
Drain
3/4 inch
1
6 in. min.
being drawn into
the unit.
Drain Trap
(19.05 mm)
Part numbers subject to change.
3. Check/Adjust Water Level
Check the water level in the sump tank. The water
level should be above the pump intake and below the
overflow. Adjust the float as needed to achieve the
proper water level.
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Evaporative Cooling with Auto Drain and Fill
continued
1. Install the Water Supply Line
Supply line opening requirements vary by unit size
and arrangement and are field supplied. Connect the
water supply line to the float valve through the supply
line opening in the evaporative cooling unit. Install the
1/2 in. normally closed solenoid (Valve A) in the supply
line. Install the 1/4 in. normally open solenoid (Valve
B) between the supply line and the drain line. Refer
to Auto Drain & Fill Evaporative Piping drawing on
previous page.
2. Install the Drain Line
Connect an unobstructed drain line to the sump drain
overflow connection. Install the 3/4 in. normally open
solenoid (Valve C)
between the sump
drain connection
and the drain line.
A trap should be
6 in. min.
used to prevent
6 in. min.
sewer gas from
being drawn into
the unit.
Drain Trap
3. Check/Adjust Water Level
Check the water level in the sump tank. The water
level should be above the pump intake and below the
overflow. Adjust the float as needed to achieve the
proper water level.
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TM
To Media
Installation of Water Wizard (optional)
Pressure
Gauge
Factory
Installed
Evaporative Cooling with the Water Wizard™
Sump Drain
NOTE
Manual Supply
Valve
The following instructions are provided for evaporative
coolers equipped with the Water Wizard™ only.
Additional instructions are provided for evaporative
coolers equipped with the auto-drain and fill or
bleed-off.
Supply Solenoid
(Normally Closed)
Roof
Line
WARNING
Field
Installed
Supply Line Drain Solenoid
(Normally Open)
Trap
Disconnect and lock-out all power and gas before
performing any maintenance or service to the unit.
Failure to do so could result in serious injury or
death and damage to equipment.
Water Wizard™ Installation
3. Wire the Solenoid(s)
Wire the supply line solenoid and drain solenoid as
shown on the unit’s wiring diagram in the control
center.
Water Wizard™ Valves
(When provided by Greenheck)
GFC
Part
No.
De-
4. Wire the Temperature Sensor
If the evaporative cooler shipped separate from the
unit, the temperature sensor must be wired. The
sensor wire is bundled inside the discharge end of the
evaporative cooler. Wire the sensor wire to terminals
AI2 and AIC on the terminal strip in the unit’s control
center.
Unit
Model
Assembly
Number
ASCO Solenoid
Energized Diameter Qty.
Position
Part No.
Type
1/2 inch
(12.7 mm)
MSX -
H12/H22
461262 8210G2 Supply Closed
Supply
383086 8210G34 Line
Drain
1
1
1
1
852370
852371
1/2 inch
(12.7 mm)
MSX - H32
(<9000 cfm)
Open
NOTE
3/4 inch
(19.05 mm)
383088 8210G9 Supply Closed
Supply
383086 8210G34 Line
Drain
MSX - H32
(≥9000 cfm)
The Water Wizard™ start-up must be completed for
proper performance.
1/2 inch
(12.7 mm)
MSX-H35,
H38, H42
Open
Part numbers subject to change.
1. Install Normally Closed Supply Line/
Solenoid
Connect the water supply line to the manual supply
valve in the unit. Install the supply solenoid in the
supply line, upstream of the manual supply valve and
below the roof line.
2. Install Normally Open Drain Line/
Solenoid
Connect the drain line to the supply line between the
manual supply valve and the supply solenoid. Install a
drain solenoid in the drain line, below the roof line. A
trap should be installed in the drain line.
NOTE
Solenoid(s) may be provided by Greenheck (if
ordered) or by others.
CAUTION
Any wiring deviations may result in personal injury
or property damage. Greenheck is not responsible
for any damage to, or failure of the unit caused by
incorrect final wiring.
Model MSX Make-Up Air
12
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Installation of Direct Expansion (DX)
Coil Piping (optional)
NOTE
If a hot gas bypass kit was provided by others, refer
to the manufacturer’s instructions.
IMPORTANT
3. Install Suction Line
Guidelines for the installation of direct expansion
cooling coils have been provided to insure proper
performance and longevity of the coils. These are
general guidelines that may have to be tailored
to meet the specific requirements of any one job.
As always, a qualified party or individual should
perform the installation and maintenance of any coil.
Protective equipment such as safety glasses, steel
toe boots and gloves are recommended during the
installation and maintenance of the coil.
Install suction line(s) from the compressor to the
suction connection(s) which are stubbed through the
side of the cabinet.
4. Install the Liquid Line and Thermal
Expansion Valve (TEV) (by others)
Liquid line openings vary by coil size and
circuiting and are field supplied. Follow the TEV
recommendations for installation to avoid damaging
the valve. If the valve is externally equalized, use a
tubing cutter to cut off the plugged end of the factory
installed equalizer line. Use a de-burring tool to
remove any loose metal from the equalizer line and
attach it to the TEV. If the valve is internally equalized,
the factory installed equalizer line can be left as is.
IMPORTANT
All field brazing and welding should be performed
using high quality materials and an inert gas purge
(such as nitrogen) to reduce oxidation of the internal
surface of the coil.
IMPORTANT
Coil
Suction Header
Distributor
Equalizer Line
Liquid Line
All field piping must be self-supporting and flexible
enough to allow for the thermal expansion of the coil.
Nozzle
1. Locate the Distributor(s) by Removing
the Distributor Access Panel
Thermal
Expansion
Valve (by others)
Suction Line
Remote Sensing Bulb
Straps
Suction Connection
General Installation
5. Mount the Remote Sensing Bulb
Distributor Access Panel
(by others)
The expansion valve’s remote sensing bulb should be
securely strapped to the horizontal run of the suction
line at the 3 or 9 o’clock position and insulated.
6. Check Coil Piping for Leaks
Pressurize the coil to 100 psig with dry nitrogen or
other suitable gas. The coil should be left pressurized
for a minimum of 10 minutes. If the coil holds the
pressure, the hook-up can be considered leak free.
If the pressure drops by 5 psig or less, re-pressurize
the coil and wait another 10 minutes. If the pressure
drops again, there is likely one or more small leaks
which should be located and repaired. Pressure losses
greater than 5 psig indicate a large leak that should be
isolated and repaired.
Thermal
(by others)
(by others)
Installation with Hot Gas Bypass
2. Verify Nozzle Placement
Inspect the refrigerant
distributor and verify
that the nozzle is in
place. The nozzle is
generally held in place
by a retaining ring or is
an integral part of
7. Evacuate and Charge the Coil
Use a vacuum pump to evacuate the coil and any
interconnecting piping that has been open to the
atmosphere. Measure the vacuum in the piping using
a micron gauge located as far from the pump as
possible. Evacuate the coil to 500 microns or less,
and then close the valve between the pump and the
system. If the vacuum holds to 500 microns or less
Retainer
Ring
Nozzle
Distributor
Nozzle Placement
the distributor itself.
Model MSX Make-Up Air
®
13
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for one minute, the system is ready to be charged or
refrigerant in another portion of the system can be
opened to the coil. A steady rise in microns would
indicate that moisture is still present and that the coil
should be further vacuumed until the moisture has
been removed.
Installation of Chilled Water Coil
Piping (optional)
IMPORTANT
Guidelines for the installation of the cooling coil
have been provided to insure proper performance
of the coils and their longevity. These are general
guidelines that may have to be tailored to meet the
specific requirements of any one job. As always,
a qualified party or individual should perform the
installation and maintenance of the coil. Protective
equipment such as safety glasses, steel toe boots
and gloves are recommended during the installation
and maintenance of the coil.
NOTE
Failure to obtain a high vacuum indicates a great
deal of moisture or a small leak. Break the vacuum
with a charge of dry nitrogen or other suitable
gas and recheck for leaks. If no leaks are found,
continue vacuuming the coil until the desired
vacuum is reached.
8. Install the Drain Line
Connect an
When installing couplings, do not apply undue
stress to the connection. Use a backup pipe
wrench to avoid breaking the weld between the coil
connection and the header.
unobstructed drain
line to the drain
6 in. min.
pan. A trap should
be used to prevent
sewer gas from being
drawn into the unit.
All field piping must be self-supporting. System
piping should be flexible enough to allow for the
thermal expansion and contraction of the coil.
6 in. min.
Drain Trap
1. Verify Coil Hand Designation
IMPORTANT
Check the coil hand
Hot Return
Connection
All traps must be installed below the roof line or be
otherwise protected from freezing.
designation to ensure that
it matches the system.
Coils are generally
Entering Air
Leaving Air
plumbed with the supply
connection located on
the bottom of the leaving
air-side of the coil and the
Cold Supply
Connection
return connection at the top of the entering air-side
of the coil. This arrangement provides a counter flow
heat exchanger and positive coil drainage.
2. Check the Coil for Leaks
Pressurize the coil to 100 psig with dry nitrogen or
other suitable gas. The coil should be left pressurized
for a minimum of 10 minutes. If the coil holds the
pressure, the hook-up can be considered leak free.
If the pressure drops by 5 psig or less, re-pressurize
the coil and wait another 10 minutes. If the pressure
drops again there is likely one or more small leaks
which should be located and repaired. Pressure losses
greater than 5 psig indicate a large leak that should be
isolated and repaired.
3. Connect the Supply and Return Lines
Connect the supply and return lines as shown above.
4. Install the Drain Line
Connect an unobstructed
drain line to the drain pan.
6 in. min.
A trap should be installed
Drain
Trap
to prevent sewer gas from
being drawn into the unit.
6 in. min.
IMPORTANT
All traps must be installed below the roof line or be
otherwise protected from freezing.
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14
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Installation of Building Pressure
Control (optional)
1. Mount Pressure Tap
Using the factory provided bracket, mount the
pressure tap to the
outside of the unit.
Choose a location
out of the prevailing
winds and away from
supply or exhaust
fans to assure
accurate readings.
2. Run Pressure Tap Lines
Run a pressure tap line from the pressure tap on the
outside of the unit to the low pressure tap on the back
of the photohelic gauge. Run a second pressure tap
line from the high pressure tap on the back of the
photohelic gauge to the space. Fifty feet of tubing is
supplied with the unit.
High Pressure
Factory
Wiring
Tap
to Space
Low Pressure
Tap
to Outside
Connections for Photohelic Gauge
3. Set the Building Pressure
The pressure gauge is used to set the desired building
pressure. The pressure is set by adjusting the knobs
for the upper and lower pressure limits. Typical
settings are 0.0 inch wc for the lower and 0.10 inch wc
for the upper pressure setting.
Pressure Indicating
Needle
Pressure Setting
Needles
Pressure Setting Knobs
Typical Photohelic Gauge Settings
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®
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2. Check the Blower Rotation
Open the blower access door
and run the blower momentarily
to determine the rotation.
Start-Up - Blower
Refer to the Start-Up Checklist in the Reference
section before proceeding further!
Arrows are placed on the
Pre Start-Up Check
blower scroll to indicate the
proper direction or reference
the example shown to the right.
Rotate the fan wheel by hand and make sure no parts
are rubbing. Check the V-belt drive for proper alignment
and tension (a guide for proper belt tension and
alignment is provided in the Belt Maintenance section).
Check fasteners, set screws and locking collars on the
fan, bearings, drive, motor base, and accessories for
tightness.
Blower
Housing
Blower Rotation
NOTE
To reverse the rotation on three phase units,
disconnect and lock-out the power, then
interchange any two power leads.
WARNING
Disconnect and lock-out all power and gas before
performing any maintenance or service to the unit.
Failure to due so could result in serious injury or
death and damage to equipment.
NOTE
To reverse the rotation on single phase units,
disconnect and lock-out the power, then rewire the
motor per the manufacturer’s instructions.
IMPORTANT
SPECIAL EQUIPMENT REQUIRED
If the blower is rotating in the wrong direction, the
unit will move some air, but will not perform as
designed. Be sure to perform a visual inspection to
guarantee the correct blower rotation.
Required and recommended tools. Equivalent
products may be used.
Manufacturer:
Model:
Phone:
Fluke
177
1-800-44-FLUKE
Voltage &
Amperage
Meter
3. Check for Vibration
Check for unusual noise, vibration or overheating of
the bearings. Reference the Troubleshooting section
for corrective actions.
Manufacturer:
Model:
Phone:
Fluke
50
1-800-44-FLUKE
Thermometer
Manufacturer:
Model:
IMPORTANT
Fluke
116
1-800-44-FLUKE
Micro Amp
Meter
Excessive vibration may be experienced during
the initial start-up. Left unchecked, it can cause a
multitude of problems including structural and/or
component failure.
Phone:
Manufacturer:
Model:
Phone:
Manufacturer: Monarch
Model:
Phone:
Dwyer
Slack Tube
1-219-897-8000
U-Tube
Manometer
IMPORTANT
Generally, fan vibration and noise is transmitted
to other parts of the building by the ductwork. To
minimize this undesirable effect, the use of heavy
canvas duct connectors is recommended.
Pocket Tach 100
1-800-999-3390
Tachometer
WARNING
4. Motor Check
Measure the motor’s voltage, amps and RPM.
Compare to the specifications. Motor amps can be
reduced by lowering the motor RPM or increasing
system static pressure.
Check the housing, blower, and ductwork for any
foreign objects before running the blower.
1. Check the Voltage
Before starting the unit, compare the supplied voltage,
hertz, and phase with the unit and motor’s nameplate
IMPORTANT
Additional starters and overloads may be provided
in the make-up air control center for optional
exhaust blowers. Any additional overloads must be
checked for proper voltage, amps and RPMs.
information.
Voltage, Hertz, Phase
VOLTS
HZ
EXH HP
MOP
PH
SUP HP
MCA
Electrical Nameplate
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16
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5. Air Volume Measurement & Check
Measure the unit’s air volume (cfm) and compare it with
it’s rated air volume. If the measured air volume is off,
adjust the fan’s RPM by changing/adjusting the drive.
NOTE
The most accurate way to measure the air volume is
by using a pitot traverse method downstream of the
blower. Other methods can be used but should be
proven and accurate.
IMPORTANT
Changing the air volume can significantly increase
the motor’s amps. If the air volume is changed,
the motor’s amps must be checked to prevent
overloading the motor.
NOTE
To ensure accuracy, the dampers are to be open
when measuring the air volume.
6. Set-Up Optional Components
Adjust the settings on the optional components. See
the Control Center Layout in the Reference section for
location of optional components.
• Heating Inlet Air Sensor
Typical setting: 60-70°F (15-21°C)
• Cooling Inlet Air Sensor
Typical setting: 75°F (24°C)
• Building Freeze Protection
Typical setting: 5 minutes; 45°F (7°C)
• Dirty Filter Gauge
Typical setting: Settings vary greatly for each unit.
(see Reference section for adjusting information)
Model MSX Make-Up Air
®
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Start-Up - Electric Heater (optional)
Refer to the Start-Up Checklist in the Reference
section before proceeding further!
Pre Start-Up Check
Check all electrical connections. Tighten any loose
connection to all components including contactors,
heating elements and main power lugs.
WARNING
Disconnect and lock-out all power before
performing any maintenance or service to the unit.
Failure to due so could result in serious injury or
death and damage to equipment.
1. Check the Voltage
Before starting the heater, compare the supplied
voltage, hertz, and phase with the heater’s nameplate
information.
2. Airflow Interlock
With the supply fan on, verify the electric heater’s
airflow interlock (DDS) is made.
3. Set the Unit’s Operating Temperature
Set the operating temperature by adjusting the
discharge temperature selector. Typical settings are
65-70°F (18-21°C).
NOTE
If the heater is equipped with an optional inlet
air sensor the heater will not energize unless the
outdoor air temperature is less than the inlet air
sensor’s set point.
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18
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8. Put the Unit into Service
Remove the jumper, and energize the blower(s). Verify
proper operation.
Start-Up - Evaporative Cooling
Recirculating (optional)
1. Check the Installation
The media may have been removed during installation,
so its orientation
IMPORTANT
Check the media for minerals after two weeks of
service and adjust the bleed-off rate accordingly.
45º
should be double
checked. The
media should
be installed with
the steeper flute
angle sloping
down towards
the entering air
side.
Bleed-Off
Valve
Pump
Filter
Supply
Connection
Float
Valve
Threaded Float
Adjustment
Entering Air
Leaving Air
Overflow
15º
Media Orientation
Verify that the stainless steel caps and distribution
headers are in place. The headers should be located
over the media towards the entering air side. The caps
should be placed over the headers.
2. Check the Pump Filter
Check that the pump filter is around the pump inlet.
Evaporative Cooler Set-Up
3. Fill the Sump and Adjust the Float
Turn on the water supply and allow the sump tank to
fill. Adjust the float valve to shut-off the water supply
when the sump is filled to within 1 inch of the bottom
of the overflow.
Temperature
Setting
4. Break-in the Media
Open the bleed-off valve completely and saturate
the media with the blower(s) off for no less than 20
minutes.
t2 settings
t1 settings
NOTE
A jumper will need to be installed in the control
center to power the evaporative pumps with the
blower(s) off. Reference the unit’s ladder diagram to
determine proper terminals.
Evaporative Freeze
Protection
Evaporative
Timer
5. Check the Flow Rate
The pumps should provide enough water to saturate
the media in 45 to 60 seconds. Consult the factory, if
adequate flow is not achieved.
6. Adjust the Water Bleed-Off Rate
The water bleed-off rate is dependent on the water’s
mineral content. The bleed-off should be adjusted
based on the media’s mineral deposits after two
weeks of service.
7. Set the Optional Auto Drain and Fill
Set the auto drain, fill timer and temperature settings.
Timer settings are: t1: 1.0, 10min
t2: 0.4, 60h
Temperature is typically set to 45°F (7°C)
Model MSX Make-Up Air
®
19
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5. Check Media
Start-Up - Water Wizard™ (optional)
Start the cooling cycle and check the media after one
hour of operation. If the media is continuously dry or if
too much water is draining from the sump tank, refer
to Troubleshooting, Water Wizard™.
L1
L2
L3
Function Key
Up Key
NOTE
Enter Key
Down Key
Steps 6 through 8 are provided to adjust the
minimum cooling temperature. The minimum cooling
is preset to the factory recommended 75°F (24°C).
Only adjust if needed.
Water Wizard™ User Interface
Key Function Description
1. Open the Solenoid
NOTE
Confirm that the manual water supply valve
is closed. Press and hold the Function Button
for one second. L3 will begin blinking (short on, long
off), indicating that Flow Test Mode is active and the
supply solenoid is open.
The inlet air sensor function overrides and shuts
down the evaporative cooler if the outside
temperature falls below the minimum cooling
temperature.
6. Enter Program Mode
Press and hold
2. Set the Water Pressure
With the solenoid open, set the supply water
pressure to the correct setting (see table below).
Use the manual supply valve to adjust the supply
pressure. A pressure gauge is provided between the
manual supply valve and the media.
the Enter Key
for three seconds. The
display will read “Pro”
when Program Mode is
active.
Program Display
WARNING
7. Adjust the Minimum Cooling
Opening the manual supply valve will allow water
to pass to the media. Be sure the sump is safely
draining before opening the manual supply valve.
Temperature
While in the
Program Menu,
use the Up and
Down Keys to
navigate the
NOTE
The manual supply valve ships closed and must be
adjusted for proper performance.
Menu Options
until “toF” is
displayed. Press the
Enter Key to access the selected Menu Option setting.
Recommended Water Pressure Chart
Minimum Cooling
Temperature Display
Housing
Size
Media Width
(inches)
Water Pressure
(in. wc)
MSX-H12
30
433⁄4
60
66
96*
20
36
61
72
42
Use the Up and Down Keys to adjust the Minimum
Cooling Temperature as needed. Press the Enter Key
to save the Minimum Cooling Temperature setting and
return to the Program Menu.
MSX-H22
MSX-H32
NOTE
MSX-H35
MSX-H38
MSX-H42
120*
180*
216*
61
37
51
The enter key must be pressed to save the new
minimum cooling temperature.
*Multiple media sections. Values represent total media width.
8. Exit Program Mode
After 15 seconds of idle time the controller will exit
Program Mode.
NOTE
The recommended water pressure is based on
media width. Refer to the table provided for proper
water pressure settings.
3. Break-in Media
Leave the supply solenoid open to saturate and
break-in media for 20 minutes with the blower off.
4. Close Solenoid
With the pressure set, press the Function Key
for one second to deactivate Flow Test Mode
and allow the supply solenoid to close.
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20
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NOTE
The Freeze Temperature is preset to the factory
recommended 45°F. Steps 9-11 should only be
completed if the Freeze Temperature needs adjustment.
NOTE
The Freeze Temperature is the temperature at which the
supply solenoid closes and the drain solenoid opens
to drain the supply line, preventing possible freeze
damage. A drain solenoid is required for this option.
9. Enter Program Mode
Press and hold
the Enter Key
for three seconds. The
display will read “Pro”
when Program Mode is
active.
Program Display
10. Adjust the Freeze Temperature
While in Program Mode, use the Up and Down
Keys to navigate
through the Menu
Options until
“Frt” is displayed.
Press the Enter
Key to access the
selected Menu Option
Freeze Temperature
Display
setting.
Use the Up and Down Keys to adjust the Freeze
Temperature setting as needed. Press the Enter Key to
set the Freeze Temperature and return to the Program
Menu.
NOTE
The enter key must be pressed to save the new
freeze temperature.
11. Exit Program Mode
After 15 seconds of idle time the controller will exit
Program Mode.
Model MSX Make-Up Air
®
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Building Pressure Control —
a variable frequency drive is
controlled according to input
from a pressure sensing device.
BLOWER
Check Operation - VAV Units
(optional)
EXHAUST
(OPTIONAL)
SUPPLY
MAIN VALVES
HEAT
NOTE
DIRTY FILTERS
(OPTIONAL)
Turn both knobs to the upper
most pressure setting. You may
have to remove the outdoor
pressure tap tubing. VAV systems
should go to maximum speed.
Set both knobs at the lowest
setting and the VAV systems
should go to minimum speed.
70
75
65
60
55
80
85
Blower Start-Up, Steps 1-5 should be performed
before the blower is run.
90
NOTE
PHOTOHELIC
For maintenance issues associated with variable
frequency drives, consult the drive’s manual
supplied with the unit. The drives are programmed
at the factory and should not need any adjustment
during installation and start-up. For kitchen
applications, the drive may be located in the kitchen
or in the unit.
GREENHECK
®
Building
Pressure Control
Reset the correct pressure limits
before starting the unit.
Pressure Indicating
Needle
Pressure Setting
Needles
This picture depicts a
typical photohelic setting.
Typical settings are 0.0 inch
wc for the lower pressure
setting and 0.10 inch wc for
the upper pressure setting.
The needle indicates a
negative building pressure.
During correct operation,
the indicating needle will
remain between or near the
setting needles.
Variable Volume Operation
The variable volume option is recommended when
a building’s exhaust volume may vary. This option
enables the make-up air volume to track with the
exhaust volume, providing only the amount of make-
up air required. Control strategies include 2-speed and
modulating blowers. Before the unit is left in service,
the variable volume control system should be tested.
Pressure Setting Knobs
Photohelic Gauge
External Signal — a variable frequency drive is
controlled according to input from an external 2-10
VDC or 4-20 mA signal (by others).
2-Speed
A variable frequency drive (VFD) is used to control
air volumes. The VFD can be switched to low or high
speed from a remote control panel. Turn the fan speed
switch on the remote control panel to each position
and confirm that the fan speed adjusts accordingly.
A 2 VDC or 4 mA signal will send the blower to low
speed. The blower will go to maximum speed with a
10 VDC or 20 mA signal.
Variable Kitchen Control — a variable frequency
drive is controlled by input from a remote speed
control. This unit allows automatic adjustment of
make-up air volumes based on varying cooking loads.
Modulating
Potentiometer Control — a variable frequency drive
is controlled by input from a remote
BLOWER
EXHAUST
(OPTIONAL)
speed selector (potentiometer).
SUPPLY
MAIN VALVES
This unit allows easy manual
HEAT
adjustment of make-up air
volumes. To test potentiometer
operation, turn the potentiometer
DIRTY FILTERS
70
75
65
80
(OPTIONAL)
60
85
55
90
to the two extremes. With variable
volume, make sure the fan goes to
maximum and minimum speed.
When the potentiometer is at 0, the
GREENHECK
®
fan speed will be at its minimum.
When the potentiometer is at 100,
the fan will be at its maximum
speed.
Potentiometer
Control
Model MSX Make-Up Air
22
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Building Pressure Control — a
modulating spring return actuator
is used to control the return air
amounts. The return air damper
modulates from fully open to fully
closed based on a signal from a
remote pressure sensing device.
Check Operation - Recirculating
Units (optional)
BLOWER
EXHAUST
(OPTIONAL)
SUPPLY
MAIN VALVES
HEAT
NOTE
DIRTY FILTERS
(OPTIONAL)
70
75
65
60
55
80
85
90
Blower Start-Up, steps 1-5 should be performed
before the blower is run.
Turn both knobs to the upper
most pressure setting. You may
have to remove the outdoor
pressure tap tubing. The return air
damper should close.
PHOTOHELIC
Recirculation Operation
The recirculation operation option is recommended
when the ventilation equipment provides the primary
source of heating for the space. Recirculation can
vary from 100% return air to 100% outside air. Control
strategies include 2-position and modulating dampers.
GREENHECK
®
Building
Pressure Control
Set both knobs at the lowest setting and the damper
should open. It may take one to two minutes for the
damper to reach the desired position.
Before the unit is left in service, the recirculation
control system should be tested.
Reset the correct pressure limits before starting the
unit.
Pressure Indicating
Needle
Pressure Setting
Needles
This picture shows a typical
photohelic setting. Typical
settings are 0.0 inch wc
for the lower and 0.10 inch
wc for the upper pressure
setting. The needle in this
photo indicates a negative
building pressure. During
correct operation, the
2-Position Damper
A 2-position spring return actuator is used to control
the return air amounts. The damper moves from open
to closed. If power is cut to the
EXHAUST
BLOWER
(OPTIONAL)
unit, the outdoor air damper will
SUPPLY
fail to close.
MAIN VALVES
HEAT
RECIRCULATION
Turn the recirculating switch
on the remote control panel to
each position and confirm that
the return air damper adjusts
accordingly. The damper actuator
may take a few minutes to open
or close.
indicating needle will remain
between or near the setting
needles.
Pressure Setting Knobs
DIRTY FILTERS
70
75
65
(OPTIONAL)
80
60
Photohelic Gauge
85
55
90
GREENHECK
®
External Signal — a modulating spring return
actuator is used to control the return air amounts.
Return air damper modulates from fully open to fully
closed based on an external 2-10 VDC or 4-20 mA
signal (by others).
2-Position
Damper Control
Modulating
The return air damper will close with a 10 VDC or
20 mA signal. The return air damper should open with
a 2 VDC or 4mA signal. The damper actuator may take
a few minutes to open or close.
Potentiometer Control — a modulating spring return
actuator is used to control the return air amounts. The
return air damper modulates from fully open to fully
closed based on a signal from a remote potentiometer.
To test potentiometer operation,
BLOWER
EXHAUST
(OPTIONAL)
turn the potentiometer to the two
extremes. Confirm that the return
SUPPLY
MAIN VALVES
HEAT
air damper fully opens and fully
closes. When the potentiometer
DIRTY FILTERS
70
75
65
80
(OPTIONAL)
60
85
is at 0, the return air damper will
open. When the potentiometer is
at 100, the return air damper will
close. The damper actuator may
take a few minutes to open or
close.
55
90
GREENHECK
®
Potentiometer
Control
Model MSX Make-Up Air
®
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differential switch (PDS), which closes when
proper airflow is achieved
Operation - Electrical
Electrical Sequence
• Power passes through N.C. automatic and
manual reset temperature cutouts (A and
M), which remain closed if the maximum
temperature has not been reached
• Power passes to and energizes operating
contactor relay (C1)
• Power passes through N.O. contacts on
operating contactor (C1), which is closed
• Electric heater modulates/stages to maintain
temperature set point
1. Exhaust Fan Contact (S1) Closed
(optional)
• Power passes through N.C. contact on exhaust
fan overload (ST2 OL), which is closed if
exhaust fan (M2) has not overloaded
• Power passes to exhaust fan starter (ST2)
• N.O. contact on exhaust fan starter (ST2) is
energized and closed
• Power passes to exhaust fan
• Exhaust fan (M2) starts
4. Evaporative Cooling Contact (S4)
Closed* (optional)
2. Supply Fan Contact (S2) Closed
• Power passes through N.C. field supplied fire
contact (FSC)
• N.O. contact on fan relay (RF) is energized and
closed
• Power passes through N.O. contact on optional
inlet air sensor (TS4), which is energized and
closed if the inlet air temperature is above the
set point
• Power passes through optional N.O. contact on
exhaust fan starter (ST2), which is closed when
the optional exhaust starter (ST2) is activated
• Power passes through N.C. contact on supply
starter overload (ST1 OL), which is closed if the
supply fan has not overloaded
• Power passes through N.C. contact on optional
freeze protection timer (RT4) which remains
closed if the temperature has remained above
the set point
• Power passes to and energizes cool relay (RC)
• N.O. contact on cool relay (RC) is energized and
closed
• Power passes to optional evaporative cooling
pump (P1)
*If DX or chilled water coils are used rather than an evaporative
cooler, the cooling sequence of operation will depend on the coil
controls. Cooling coil controls are supplied by others.
• Power passes to and energizes optional inlet
damper (D1), which opens
• Power passes through optional N.O. damper
limit switch (DL1), which is energized and
closed when the optional inlet damper is open.
It may take several minutes for the damper to
fully open and for the damper limit switch to
close
• Power passes to and energizes fan relay (RF)
• Power passes through N.O. contact on fan relay
(RF), which closes when the fan relay (RF) is
energized
• Power passes to and energizes supply fan
starter (ST1)
• N.O. contact on supply fan starter (ST1) is
energized and closed
• Supply fan (M1) starts
3. Electric Heat Contact (S4) Closed
(optional)
• Power passes through N.O. contact on fan relay
(RF), which is energized and closed
• Power passes through N.C. contact on optional
inlet air sensor (TS4), which is closed if the inlet
air temperature is below the set point
• Power passes to and energizes heat relay (RH)
• Power passes through N.O. contact on heat
relay (RH), which closes when the heat relay
(RH) is energized
• Power passes through N.O. contact on pressure
Model MSX Make-Up Air
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Dry Bulb Temperature
Operation-Water Wizard™ (optional)
The dry bulb temperature is visible on the home
screen. If a number is not visible, wait 15 seconds
and use the Up and Down Keys until a number is
displayed.
L1
L2
L3
Function Key
Up Key
Wet Bulb Temperature
To view the Wet Bulb Temperature, simultaneously
press and hold the Up and Down Keys.
Enter Key
Down Key
Water Wizard™ User Interface
Key Function Description
Indicating Lights
Three indicating lights are located across the top
of the display to indicate the status of the Water
Wizard™.
Drain Mode
Drain Mode locks open the drain solenoid and drains
the supply line between the supply solenoid and
the media. To activate Drain Mode simultaneously,
press the Function and Enter Keys (L2 will light). To
deactivate Drain Mode and unlock the drain solenoid,
simultaneously press the Function and Enter Keys
again.
Light Status
Blinking
(Long on,
Short Off)
Blinking
(Short on,
Long Off)
Indicating
Light
On
Off
Call for
cooling.
Outdoor
No call
for
cooling temperature
lockout.
Flow Test Mode
Call for
cooling
N/A
L1
Activating Flow Test Mode opens the supply solenoid
and allows water to pass to the manual supply
valve. To activate Flow Test Mode, press and hold
the Function Key for one second (L3 will flash). To
deactivate Flow Test Mode and allow the supply
solenoid to close, press and hold the Function Key
again for one second.
Supply
solenoid
open.
Drain
Drain
solenoid solenoid
open closed
N/A
L2
L3
(Drain
solenoid
closed).
CAUTION
Supply
solenoid
locked
The sump drain line must be clear and draining to a
safe location before using Flow Test Mode.
Cooling Cooling
on off
Flow test
mode active
CAUTION
closed
Be aware of the water level in the sump tank at all
times when using the Flow Test Mode.
Program Mode
Program Mode allows the user to view the Program
Menu and edit the factory default settings. To access
Program Mode and view the Program Menu press and
hold the Enter key for three seconds. While viewing
the Program Menu press the Up and Down keys to
scroll through the Menu Options. To view the setting
of the selected Menu Option, press the Enter key.
To edit the setting, press the Up or Down key while
viewing the setting. To save the setting and return to
the Program Menu, press the Enter key. To return to
the Program Menu without saving the change, wait
10 seconds. To exit Program Mode from the Program
Menu, wait 10 seconds.
WARNING
Changing the default settings will significantly affect
performance. Only change a setting after reading
and understanding this entire manual.
WARNING
The Enter key must be pressed to save any changes
made to a setting.
Model MSX Make-Up Air
®
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Troubleshooting
Blower Does Not Operate
No
Proper supply power at
main disconnect
Check main voltage
(See Blower Start-Up Step #1)
Main Disconnect (DS1) Off
(Turn Main Disconnect DS1 On)
Primary fuses blown
Yes
(Replace fuses)
No
No
No
No
No
24 VAC between
terminals R and X?
Main Transformer (TR1) Defective
Yes
(Replace transformer)
24 VAC between
terminals G and X?
Supply Switch (S2) Off
(Turn Supply Switch (S2) On)
Fire System Contact (FSC) tripped/not installed
(Correct/Replace)
Yes
24 VAC across
terminals 3 and X?
Supply Fan Overload (ST1 OL) tripped
(Reset and check motor amps. Reference Blower Start-Up #4)
Optional Exhaust Fan Interlocks (ST2-ST5) open
(Correct/Replace)
Yes
24 VAC across
terminals 4 and X?
Yes
(Optional) Freeze Protection (RT4) Tripped
(Reset)
24 VAC across A2 and A1 on
supply contactor (ST1)
(Optional) Damper Limit Switch (DL1) holding
(Wait for actuator to open fully or adjust limit switch)
(Optional) Damper Limit Switch jumper missing
(Install jumper. Reference the unit’s ladder diagram for terminals)
Fan Relay (RF) is not energized
Yes
(Check for loose connection) (Repair or replace relay)
Broken fan Bbelt
(Replace. Reference Maintenance section)
Defective motor or capacitor
(Repair/Replace)
Blown motor fuse
(Replace)
One or more legs of 3 phase is out
(Restore missing legs)
At this time the supply contactor (ST1) should pull in,
passing power to the supply motor
and the blower should start.
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Troubleshooting
Motor Overamps
Yes
Yes
No
Air volume too high?
Adjust drives or increase external
static pressure as needed.
No
(Reference Blower Start-Up Step #5)
Actual static pressure
lower than design?
No
Adjust drives to reduce blower RPM.
(Reference Blower Start-Up Step #5)
Blower rotation correct?
Yes
Reverse blower rotation.
(Reference Blower Start-Up Step #2)
No
Motor voltage correct?
Yes
Provide proper power supply.
(Reference Blower Start-Up Step #1)
Yes
Yes
Motor horsepower too low?
No
Resize motor.
Shorted windings in motor?
Yes
Replace motor.
Everything is working
properly, consult factory.
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®
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Troubleshooting
Insufficient Airflow
Yes
Yes
Yes
Yes
Yes
Yes
Damper(s) not fully opened?
No
Adjust damper linkage(s), or replace faulty actuator(s).
(Damper actuators may take a few minutes to open)
System static losses too high?
No
Reduce losses by improving ductwork.
Blower speed too low?
No
Adjust drives as needed.
(Reference Blower Start-Up Step #5)
Filters dirty or clogged
No
Clean or replace filters.
(Reference Filter Maintenance in the Maintenance section).
Leaks in ductwork
No
Repair leaks.
Belt slipping
Yes
Replace or tighten belt.
(Reference V-Belt Maintenance in the Maintenance section)
Everything is working properly,
consult factory.
Too Much Airflow
Yes
Yes
Yes
Blower speed too high?
No
Adjust drives as needed.
(Reference Blower Start-Up Step #5)
Filters not in place?
No
Install filters.
Insufficient external static
pressure?
No
Increase external static pressure.
Everything is working properly,
consult factory.
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Troubleshooting
Excessive Noise or Vibration
Yes
Belts worn or loose?
Replace worn belts or tighten loose belts.
(Reference V-Belt Drive Maintenance in the Maintenance section)
No
No
Sheaves aligned?
Align sheaves.
(Reference V-Belt Drive Maintenance in the Maintenance section)
Yes
Yes
Yes
Yes
Wheel unbalanced?
Clean and/or balance wheel(s).
No
Bearings worn or need
lubrication?
Replace worn bearings or lubricate bearings as needed.
(Reference Bearing Maintenance in the Maintenance section)
No
Wheel rubbing on inlet?
Adjust wheel(s) or inlet.
No
At this time noise and vibration should
be at acceptable levels.
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®
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Troubleshooting
Electric Heater Does Not Operate (optional)
Supply fan must be on for heater to operate
No
No
No
No
No
24 VAC between
terminals W1 and X?
Heat Switch (S4) Off
(Turn Heat Switch (S4) On)
Heat Switch not wired
(Wire Heat Switch (S4))
Yes
24 VAC between
terminals 22 and 21?
Main Transformer (TR2) defective
Yes
(Replace transformer)
24 VAC between
terminal A2 on heat relay (RH)
and X?
Yes
(Optional) Inlet Air Sensor (TS4) holding
(Adjust (TS4) setting. Reference Blower Start-Up Step #6)
24 VAC between
terminals T1 and 21?
Heat Relay (RH) is not energized
(Check for loose connections). (Repair or replace Heat Relay (RH))
Yes
24 VAC between
terminals I and 21?
Pressure Differential Switch (PDS) open
(Check on cause of control loss)
Yes
Automatic and/or Manual Reset Cutouts (A and M) tripped
(Reset/Replace Automatic and/or Manual Reset Cutouts (A and M))
(Check on cause of control loss)
At this time the heater should be energized.
(The heating elements will not be on if the leaving air
temperature is above its set point on the Remote Adjuster (RA))
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Troubleshooting
Evaporative Cooler does not Operate (Recirculating pump)
Supply fan must be on for cooler to operate
No
24 VAC between terminals
Cool Switch (S4) off
Y1 and X
(Turn Cool Switch (S4) on)
Cool Switch not wired
(Wire Cool Switch (S4))
Yes
24 VAC between terminal A2 on
Cooling Relay (RC) and X
Optional Inlet Air Sensor (TS4) holding
(Adjust TS4 setting. Reference Blower Start-Up Step #6)
Yes
No
No
115 VAC between terminals
102 and 101
Cooling Transformer (TR4) defective
(Replace transformer)
Yes
115 VAC between terminal
114 and 101
Cooling Relay (RC) is not energized
(Check for loose connections)
(Repair or replace relay)
Yes
At this time the evaporative cooler pumps should be on
Water Blows through Evaporative Cooler
Are the headers in place and
No
located near the entering
air side of the media?
Replace headers and/or move the headers.
(Reference Evaporative Cooler Start-Up Step #1)
Yes
Yes
Yes
Water supply greater than
evaporation and bleed-off rate?
Use the main supply valve to reduce the supply of water.
No
Air velocity greater than
specified?
Reduce the air velocity through the media.
(Reference Blower Start-Up Step #5)
No
At this time the evaporative cooler should be
operating without water blowing through.
Model MSX Make-Up Air
®
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Troubleshooting
Water Wizard™ — Improper Water Supply
NOTE
NOTE
If the water supply is too low, the media will
continuously appear dry.
Changing the On Time Factor by (1) will change the
water supply by approximately 3%.
NOTE
IMPORTANT
If the water supply is too high, the media will be
saturated and excessive water will be draining from
the sump tank.
The enter key must be pressed to save the new On
Time Factor.
4. Exit Program Mode
After 15 seconds of idle time the controller will
automatically exit Program Mode
NOTE
Some water drainage is desired to keep the media
flushed, but it should be minimized to utilize the
Water Wizard™.
1. Adjust the Manual Supply Valve
Adjust the manual supply valve (refer to Start-Up,
Water Wizard™). If the recommended water pressure
does not provide enough water, increase the pressure
until the desired water supply is achieved. If the
recommended water pressure provides too much
water, decrease the water pressure until the desired
water supply is achieved.
CAUTION
Only proceed to Steps 2 and 3 if Step 1 does not
correct the problem.
2. Enter Program Mode
Press and hold
the Enter key for
three seconds to enter
Program Mode. The
display will read “Pro”
when Program Mode is
Program Display
active.
3. Adjust the On Time Factor
While in the Program Menu, use the Up and
Down keys to navigate through the menu
options until “ont” is displayed.
With “ont” displayed, press the Enter key to
access the setting.
With the setting displayed, use the Up and Down keys
to adjust the setting as needed.
Increase the factor to increase the water supply or
decrease the factor to decrease the water supply.
Press the Enter key to
save the new On Time
Factor and return to the
Program Menu.
On Time Factor Display
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Maintenance - Routine
Snow Accumulation
Clear snow away from roof mounted units. Keep the
snow clear of the intake and access doors.
CAUTION
Lock-out the gas and the electrical power to the
unit before performing any maintenance or service
operations to this unit.
Motors
Motor maintenance is generally limited to cleaning
and lubrication (where applicable).
Cleaning should be limited to exterior surfaces only.
Removing dust and grease build-up on the motor
assures proper motor cooling.
Motors supplied with grease fittings should be
greased in accordance with the manufacturer’s
recommendations.
V-Belt Drives
V-belt drives must be checked on a regular basis for
wear, tension, alignment, and dirt accumulation.
Check the tension by measuring the deflection in the
belt as shown below.
Check the alignment by using a straight edge across
both sheaves as shown below.
IMPORTANT
IMPORTANT
Do not allow water or solvents to enter the motor
or bearings. Motors and bearings should never be
sprayed with steam, water or solvents.
Premature or frequent belt failures can be caused by
improper belt tension, or misaligned sheaves.
•
Abnormally high belt tension or drive
misalignment will cause excessive bearing loads
and may result in failure of the fan and/or motor
bearings.
IMPORTANT
Greasing motors is only intended when fittings are
provided. Many motors are permanently lubricated,
requiring no additional lubrication.
• Abnormally low belt tension will cause squealing
on start-up, excessive belt flutter, slippage, and
overheated sheaves.
IMPORTANT
Wheels
Do not pry belts on or off the sheave. Loosen belt
tension until belts can be removed by simply lifting
the belts off the sheaves.
Wheels require little attention when moving clean air.
Occasionally oil and dust may accumulate on the wheel
causing imbalance. When this occurs the wheel and
housing should be cleaned to assure proper operation.
IMPORTANT
When replacing V-belts on multiple groove drives,
all belts should be changed to provide uniform drive
loading.
IMPORTANT
Do not install new belts on worn sheaves. If the
sheaves have grooves worn in them, they must be
replaced before new belts are installed.
Belt Span
Deflection =
64
Belt Span
Belt Tension
Drive Alignment
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®
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Maintenance - Routine continued
Bearings
Filters
The bearings for Greenheck fans are carefully selected
to match the maximum load and operating conditions
of the specific class, arrangement and fan size.
The instructions provided in this manual and those
provided by the bearing manufacturer will minimize
any bearing problems.
Filter maintenance is generally limited to cleaning and
replacement.
If aluminum mesh filters are installed, they can be
washed in warm soapy water.
An adhesive spray can be added to aluminum mesh
filters to increase their efficiency.
If disposable filters are installed, they can be checked
by holding up to a light source. If light cannot pass
through the filter, it should be replaced.
IMPORTANT
Lubricate bearings prior to periods of extended
shutdowns or storage and rotate shaft monthly to
aid in corrosion prevention. If the fan is stored more
than three months, purge the bearings with new
grease prior to start-up.
IMPORTANT
When reinstalling filters, be sure to install them
with the airflow in the correct direction. An airflow
direction arrow is located on the side of the filters.
Recommended Bearing Lubrication Schedule (in Months*)
IMPORTANT
Bearing Bore Size (inches)
Fan
RPM
Replacement filters should be from the same
manufacturer and the same size as the original
filters provided with the unit.
1
⁄
2
-1
11⁄8 -11⁄2
15⁄8 -17⁄8 115⁄16 -23⁄16
27⁄16 -3
250
500
6
6
6
5
3
3
2
1
6
6
4
2
2
1
1
6
5
6
4
6
6
5
5
5
5
Evaporative Coolers
750
3
3
The media should be periodically brushed lightly with
a soft bristle brush in an up and down motion while
flushing with water. This aids in reducing the amount
of mineral build-up.
1000
1250
1500
2000
1
1
1
1
1
0.5
0.25
0.5
For large amounts of mineral build-up, clean or
replace the media and increase the water bleed-off or
flush rate.
*Suggested initial greasing interval is based on 12 hour
per day operation and 150°F (66°C) maximum housing
temperature. For continuous (24 hour) operation, decrease
greasing interval by 50%
The cooling media has a useful life of 3 to 5 years
depending on the water quality and the bleed-off or
flush rate.
• If extended grease lines are present, relubricate while in
operation, only without endangering personnel.
• For ball bearings (operating) relubricate until clean grease
is seen purging at the seals. Be sure not to unseat the seal
by over lubricating.
• For ball bearings (idle) add 1-2 shots of grease up to 2
inch bore size, and 4-5 shots above 2 inch bore sizes with
a hand grease gun.
IMPORTANT
When reinstalling the evaporative media, make sure
that it is installed correctly. Reference the drawing
shown below.
• For roller bearings add 4 shots of grease up to 2 inch bore
size, and 8 shots for 2-5 inch bore size with a hand grease
gun.
• Adjust relubrication frequency based on condition of
purged grease.
IMPORTANT
Replacement media should be from the same
manufacturer and be the same size as the original
media provided with the unit.
• A high quality lithium based grease conforming to NLGI
Grade 2 consistency, such as those listed here:
45º
Mobil 532
Mobilux #2
Texaco Multifak #2
Texaco Premium #2 Exxon Unirex #2
B Shell Alavania #2
Entering Air
Leaving Air
15º
Media Orientation
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Maintenance - Routine continued
Cooling Coils
WARNING
Repair and replacement of the coil and the
connecting piping, valves, etc., should be performed
by a qualified individual.
Inspect the coil for signs of corrosion and/or leaks.
Repair any leaks as required.
Inspect the coil’s surface for foreign material. If the
coil surface needs cleaning, clean the coil from the
leaving air-side so that foreign material will be washed
out of the coil rather than pushed farther in.
Inspect and clean the drain pan to prevent the growth
of algae and other organisms.
IMPORTANT
Be sure to read and follow the manufacturer’s
recommendations before using any cleaning fluid.
CAUTION
Caution should be used to avoid injury when venting
the coil. High pressure and/or high temperature
fluids can cause serious injuries.
Chilled Water Coils
Test the circulating fluid for sediment, corrosive
products and biological contaminants. Make the
necessary corrective measures.
Maintain adequate fluid velocities and proper filtering
of the fluid.
If automatic air vents are not utilized, periodic venting
of the coil is recommended to remove accumulated air.
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®
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Maintenance - Fall
Evaporative Coolers
The water should be shut off and all the lines drained
when the outside temperature drops below 45
°F.
Remove drain plugs for the winter.
Clean all interior parts of any mineral deposits or foreign
materials that may have built-up during the cooling
season.
Replace any worn or non-functioning parts.
Winterizing Chilled Water Coils
During the winter, chilled water coils need to be
protected against freezing. Greenheck recommends
protecting the coils by either blowing-out the coils or
by flushing the coils.
Blowing-Out Coils
1. Close valves on the supply and return lines.
2. Open drain valves and/or drain plug. Remove
vent plug to allow coil to drain faster.
3. After coil is fully drained, connect a blower to the
caps. Do not connect the blower to the air vent
or drain plug.
4. Close the vent plug on the header that the blower
is connected to. Open the drain valve or cap on
the other header.
5. Turn on blower for 30 minutes. Place mirror at
discharge. If the mirror fogs up, repeat procedure
until no fog appears on the mirror.
6. After drying the coil, wait a few minutes then
repeat Step #5.
7. Leave drains open and do not install plugs until
beginning of cooling season.
Flushing Coils
Greenheck recommends the use of inhibited glycol
(such as propylene or ethylene) to flush water coils
to protect against freezing. Additionally, the use of
inhibited glycol provides corrosion protection.
The table below indicate the percentage of glycol
required to prevent freezing in a coil at a given outdoor
air freeze point. Completely fill coil with solution. Drain
coil. Residual glycol fluid per these concentrations
can be left in the coil without concern of freezing.
Recovered fluid can be used to flush other coils.
Percent of
Ethylene
Glycol
Percent of
Propylene
Glycol
Freeze Point
Freeze Point
°F
ºC
°F
ºC
by Volume
by Volume
0
32
25
0
0
32
26
19
8
0
10
20
30
40
50
60
-4
10
20
30
40
50
60
-3
16
-9
-7
3
-16
-25
-37
-48
-13
-22
-33
-51
-13
-34
-55
-7
-28
-60
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Reference
Typical Control Center Layout
10
3
1
2
5
4
11
7
9
15
17
12
8
13
18
1. Primary Fuses — provides proper fusing to low
voltage transformer.
10. Exhaust Fuses (optional) — provides proper
fusing for exhaust fan motor(s).
2. Low Voltage Transformer — provides low
voltage to controls and optional evaporative
cooling controls.
3. Low Voltage Fuse — provides proper fusing
to controls and optional evaporative cooling
controls.
4. Control Terminal Block — provides wiring
access to controls.
5. Building Freeze Protection Timer (optional) —
prevents the discharge of cold air into the
building.
11. Exhaust Motor Starter (optional) — 24 volt
magnetic contacts for starting exhaust motor.
12. Exhaust Overload (optional) — provides
electronic overload protection to exhaust motor.
13. Inlet Air Sensor (optional) — outdoor air stat
that automatically controls the cooling based on
outdoor air temperature.
14. Cooling Relay (optional) — allows power to
pass to cooling controls.
15. Reset Timer (optional) — resets cooling system
to run a time interval.
6. Fan Relay — allows power to pass to energize
motor starter.
16. Auto Drain Relay (optional) — assures supply
pump does not operate during drain interval.
Allows pump to operate in cooling mode.
17. Cooling Timer (optional) — allows for
automatic draining of the evaporative cooling
system based on time schedule.
18. Dirty Filter Switch (optional) — monitors filter
pressure drop, turns on indicating light when
pressure drop is above field adjustable set point.
7. Supply Motor Starter — 24 volt magnetic
contacts for starting supply motor.
8. Supply Overload — provides electronic
overload protection to supply motor.
9. Auxiliary Contact (optional) — provides one
normally closed and one normally open contact
for other equipment.
Dirty Filter Switch
Common
Normally Open
Normally Closed
CCW to Decrease Trip Point
CW to Increase Trip Point
Negative Pressure
after the filters
Positive Pressure
before the filters
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®
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Start-Up Checklist
Start-Up Checklist
Start-Up Electric Heater (optional) – refer to
Electric Heater Start-Up section for further detail.
Unit Model Number _______________________________
(e.g. MSX-120-H32-DB)
o Check line voltage
L1-L2 __________
L2-L3 __________
L1-L3 __________
Unit Serial Number _______________________________
(e.g. 10111000)
o Set the unit’s operating temperature
Start-Up Date
_______________________________
________ °F
Start-Up Personnel Name__________________________
Start-Up Company _______________________________
Start-Up Evaporative Cooler (optional) – refer
to Evaporative Cooler Start-Up section for further
detail.
Phone Number
_______________________________
Pre Start-Up Checklist – check boxes as items
are completed.
o Check media orientation
o Check tightness of all factory wiring connections
o Verify control wiring wire gauge
o Check for proper water flow to distribution
headers
o Hand-rotate blower to verify free rotation
o Verify supply voltage to the main disconnect
o Verify the supply gas pressure
o Check for distribution header orientation to
prevent water spillage
o Verify remote controls wiring
Start-Up Blower Checklist – refer to Blower
Start-Up section for further detail.
o Check line voltage
L1-L2 __________
L2-L3 __________
L1-L3 __________
o Check blower rotation
o Check for vibration
o Supply fan RPM
o Motor nameplate amps
o Actual motor amps
o Actual CFM delivered
_________ RPM
_________ Amps
_________ Amps
_________ CFM
Optional Accessories – refer to Blower Start-Up
section, Step #6 for further detail.
o Heating Inlet Air Sensor
________ Actual Setting
Typical setting 60º-70ºF (15º-21ºC)
o Cooling Inlet Air Sensor
________ Actual Setting
Typical setting 75ºF (24ºC
o Building Freeze Protection
________ Actual Setting
Typical setting 5 minutes; 45ºF (7ºC)
o Dirty Filter Gauge
________ Actual Setting
Typical setting varies
Model MSX Make-Up Air
38
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Maintenance Log
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Model MSX Make-Up Air
®
39
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Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from
the shipment date. Any units or parts which prove defective during the warranty period will be replaced at our option
when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer for a period of
one year. Should motors furnished by Greenheck prove defective during this period, they should be returned to the
nearest authorized motor service station. Greenheck will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Greenheck Catalogs MSX provide additional information
describing the equipment, fan performance, available
accessories, and specification data.
AMCA Publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans, provides
additional safety information. This publication can be
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected] • Web site: www.greenheck.com
470658 • Model MSX Make-Up Air, Rev. 3, May 2011
Copyright 2011 © Greenheck Fan Corporation
40
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