Trane RTHD User Manual

Series R^™Helical Rotary

Liquid Chillers

Model RTHD

175-450Tons (60 Hz)

125-450Tons (50 Hz)

Built for Industrial and Commercial Applications

RLC-PRC020-EN

June 2006

Contents

Introduction

Features and Benefits

Options

Controls

Application Considerations

Selection Procedure

Model Nomenclature

General Data

Electrical Data and Connections

Dimensions andWeights

Mechanical Specifications

Conversion Table

RLC-PRC020-EN

Features and

Benefits

ApplicationVersatility and High

Performance

• Generic Building Automation System

points are available for easy access to

operational information.

• Extensive information on professional

design selection and layout is available

in a simple, highly readable electronic

format.

• Standard model RTHD configurations

are in stock and available for immediate

delivery, andTrane offers the fastest

ship cycles in the industry for built-to-

order units.

• Industrial / LowTemperature Process

Cooling – Excellent operating

temperature range and precise control

capabilities enable tight control with

single chiller or series configuration.

• Ice/Thermal Storage – Specifiers and

operators benefit from dual setpoint

control and industry-leading

temperature, efficiency, and control

capabilities, plus outstanding support

through partnership with Calmac, a

strongTrane partner providing proven

installation examples, templates, and

references that minimize design time

and energy costs.

• Heat Recovery – Maximum condenser

temperature exceeds those of previous

technologies, providing hot water and

tight control that minimizes operating

costs for the chilled water plant and

boiler/hot water heater, and consistent

dehumidification.

Simple, Economical Installation

• Compact size makes the model RTHD

well suited for the retrofit and

replacement market.

• All units fit through standard double-

width doors.

• Screw compressor technology and the

electronic expansion valve provide

reliable performance in an expanded

range of operating temperatures.

•Tight water temperature control extends

to operation of multiple chillers in

parallel or series configurations, offering

further system design flexibility for

maximum efficiency.

• Advanced design enables chilled water

temperature control to +/- 0.5°F (.28°C)

for flow changes up to 10 percent per

minute, plus handling of flow changes up

to 30 percent per minute for comfort

cooling.

•Two-minute stop-to-start and five-minute

start-to-start anti-recycle timer allows

tight chilled water temperature control

in constant or transient low-load

applications.

• LonMark communications capability

provides excellent, trouble-free

interoperability.

• Bolt-together construction makes for

fast, easy unit disassembly.

• Small RTHD footprint saves valuable

equipment room space and alleviates

access concerns for most retrofit jobs.

• Lightweight design simplifies rigging

requirements, further reducing

installation time requirements and

costs.

• Full factory refrigerant or nitrogen and

oil charges reduce required field labor,

materials, and installation cost.

• Only evaporator and condenser water

piping is required; no starter water

cooling (with its associated safety

concerns) or field piping is necessary.

• Oil cooler and purge system

connections have been eliminated.

• Simple power connection simplifies

overall installation.

• Standard unit-mounted starter for

Wye-Delta and Solid State eliminates

additional jobsite installation

considerations and labor requirements.

•Trane has conducted extensive factory

testing, and also offers options for in-

person and/or documented system

performance verification.

• CH530 controls easily interface with

Tracer Summit^™building automation

systems through single twisted-pair

wire.

Applications in this catalog specifically

excluded from the ARI certification

program are:

• Low temperature applications, including

ice storage

• Glycol

• 50Hz units below 200 nominal tons

Pueblo

Business Unit

RLC-PRC020-EN

Features and

Benefits

State-of-the-Art, Precision Control

• Microprocessor-based CH530 controls

monitor and maintain optimal operation

of the chiller and its associated sensors,

actuators, relays, and switches, all of

which are factory-assembled and

extensively tested.

• Easy interface with computers hosting

Tracer Summit^™building automation/

energy management systems allows

the operator to efficiently optimize

comfort system performance and

minimize operating costs.

•TheTrane helical rotary compressor is a

proven design resulting from years of

research and thousands of test hours,

including extensive testing under

extraordinarily severe operating

conditions.

•Trane is the world’s largest

manufacturer of large helical rotary

compressors, with tens of thousands of

commercial and industrial installations

worldwide demonstrating a reliability

rate of greater than 99 percent in the

first year of operation.

• PID (proportional integral derivative)

control strategy ensures stable, efficient

chilled water temperature control,

maintaining +/- 1°F (0.56°C) control by

proactively reacting to instantaneous

load changes of up to 50 percent.

• Adaptive Control^™attempts to maintain

chiller operation under adverse

conditions, when many other chillers

might simply shut down.

• Easy-to-use operator interface displays

all operating and safety messages, with

complete diagnostics information, on a

highly readable panel with a scrolling

touch-screen display.

•The RTHD features a complete range of

chiller safety controls.

• Over 120 diagnostic and operating

points are available, with standard

displays including chiller current draw,

condenser pressure, and evaporator

pressure.

Operating and Life Cycle

Cost-Effectiveness

• Electronic expansion valve enables

exceptionally tight temperature control

and extremely low superheat, resulting

in more efficient full-load and part-load

operation than previously available.

• Precise compressor rotor tip clearance

ensures optimal efficiency.

• Condenser and evaporator tubes use

the latest heat transfer technology for

increased efficiency.

•The RTHD includes standard electrical

demand limiting.

• Chilled water reset based on return

water temperature is standard.

• High compressor lift capabilities and

tight chilled water temperature control

allow highly efficient system design with

minimal operational concerns.

Design capabilities include:

• variable primary flow;

• series chiller arrangements for

evaporator and/or condenser;

• low evaporator and condenser flow.

Reliability and Ease of Maintenance

• Direct drive, low-speed compressor – a

simple design with only three moving

parts – provides maximum efficiency,

high reliability, and low maintenance

requirements.

• Electronic expansion valve, with fewer

moving parts than alternative valve

designs, offers highly reliable operation.

• Suction gas-cooled motor stays

uniformly cool at lower temperatures

for longer motor life.

RLC-PRC020-EN

Options

Insulation

2-Way CondenserWater RegulatingValve

For water regulation, a field-installed,

2-way butterfly-type (lug-style) valve,

with integral electrical operator and

factory-mounted valve actuator, is

available.The single-phase, reversible

motor can be factory-wired for 115VAC,

60 Hz or 220VAC, 50 Hz; the 2-way valve

is field-wired and controlled by the chiller

regulating valve control output; valves

are available in 6" and 8" (152.4 and

203.2 mm) sizes.

Main Power Disconnect

Options:

All low temperature surfaces are

covered with factory installed 3/4 inch

(19.05 mm) Armaflex II or equal (k=0.28)

insulation, including the evaporator and

water boxes, suction line, and motor

housing. 3/8" foam insulation is used on

the liquid level sensor and gas pump

assembly, including piping.

Non-fused Disconnect

A UL-approved non-fused molded case

disconnect switch, factory pre-wired with

terminal block power connections and

equipped with a lockable external

operator handle, is available to

disconnect the chiller from main power.

Low-Temperature Evaporator

Addition of an oil cooler to the oil circuit

enables evaporator operation down to

minimum leaving water temperature of

10°F (-12.2°C).

Standard Interrupting Capacity Circuit

Breaker

Nitrogen Charge

Unit is shipped with a nitrogen holding

charge in lieu of refrigerant.

A UL-approved standard interrupting

molded case capacity circuit breaker,

factory pre-wired with terminal block

power connections and equipped with a

lockable external operator handle, is

available to disconnect the chiller from

main power.

High-Temperature Condenser

Addition of an oil cooler to the oil circuit

enables condenser operation up to

maximum leaving water temperature of

114°F (45.6°C).

Seal Kit for Reassembly

Ideal for situations when the bolt-together

construction of the RTHD will be

separated for installation, this seal kit

provides replacement gaskets and rings

for reassembly.

High Interrupting Capacity Circuit

Breaker

Smooth-Bore CondenserTubes

Smooth-bore copper or premium cupro-

nickel condenser tubes, 3/4" (19.05 mm) in

diameter with .035" (0.889 mm) wall

thickness, are available for high fouling

water applications.

A UL-approved high interrupting molded

case capacity circuit breaker, factory pre-

wired with terminal block power

connections and equipped with a lockable

external operator handle, is available to

disconnect the chiller from main power.

Solid State Starter

Solid State Starter is unit-mounted with a

NEMA 1 gasketed enclosure.To extend

starter life, contactors bypass current

from the silicon control rectifiers (SCRs)

after startup.

Refrigerant Isolation Valves

Factory-installed condenser inlet and

outlet refrigerant valves allow isolation of

the full refrigerant charge in the

Ground Fault Circuit Breaker

Under/Over-Voltage Protection

Unit receives protection against

variations in voltage (current lag and

spike protection is standard).

A UL-approved standard interrupting

molded case capacity circuit breaker with

ground fault interrupting capability,

factory pre-wired with terminal block

connections and equipped with a lockable

external operator handle, is available to

disconnect the chiller from main power.

condenser while servicing the chiller.

MarineWater Boxes

Addition of marine water boxes for the

condenser allows tube cleaning without

water pipe interference.

Performance andWitnessTests

ARI-certified RTHD Performance and

WitnessTests are available, based on

requested operating points, to certify

chiller performance before delivery.

300 psig Evaporator and Condenser

Water Boxes

Water boxes are designed for 300 psig

maximum waterside working pressure,

and grooved pipe water connections are

provided for ease of installation.

RLC-PRC020-EN

Options

Programmable Relays

ControlOptions:

Default-set, factory-installed,

Tracer Summit Communications

Link to factory-installed, tested

communication board, via single twisted-

pair wiring, addsTracer Summit

communications to the system.

programmable relays allow the operator

to select four relay outputs from a list of

eight. Available relays are: Alarm-

Latching, Alarm-Auto Reset, General

Alarm,Warning, Chiller Limit Mode,

Compressor Running, Head Pressure

Relief Request, andTracer Control.

LonTalk LCI-C Interface

LonTalk (LCI-C) communications

capabilities are available, with

communication link via single twisted-pair

wiring to factory-installed, tested

communication board.

ChilledWater Reset – OutdoorAir

Temperature

Controls, sensors, and safeties allow

reset of chilled water temperature, based

on temperature signal, during periods of

low outdoor air temperature (chilled

water reset based on return chilled water

temperature is standard).

External ChilledWater Setpoint

External ChilledWater Setpoint is

communicated to a factory-installed,

tested communication board through a 2-

10Vdc or 4-20mA signal.

Condenser-RegulatingValve Control

Chiller applies a Proportional Integrative

Control (PID) algorithm to control water

regulating valve via 0-10Vdc signal.

External Current Limiting

External Current Limit Setpoint is

communicated to a factory-installed,

tested communication board through a 2-

10Vdc or 4-20mA signal.

Percent of Full Run LoadAmps Output

Control system indicates the active chiller

percent of full run load amps, based on a

0-10Vdc signal.

External Base Loading

External Base Loading is communicated

to a factory-installed and tested

communication board through a

2-10Vdc or 4-20mA signal.

Condenser Pressure Output

Control system indicates chiller

differential pressure or condenser

pressure, based on a 0-10Vdc signal.

Ice Making Control

Controls and safeties allow operation

with brine temperatures down to 20°F

(-6.7°C) , and dual setpoints enable both

ice making and daytime comfort cooling.

Refrigerant Monitor Input

Control system indicates refrigerant

monitor status of 0-100 or 0-1000 ppm

(user selectable), based on a 2-10Vdc /

4-20 mA signal.

RLC-PRC020-EN

Controls

• Fast, easy access to available chiller

data in tabbed format, including:

— Modes of operation, including normal

cooling and icemaking

—Water temperatures and setpoints

— Loading and limiting status and

setpoints

— Evaporator, condenser, and

compressor reports containing all

operational information on individual

components, including:

-Water and air temperatures

- Refrigerant levels, temperatures,

and approach

LCD Touch-Screen Display

with Multi-Language Support

The standard DynaView display provided

with the CH530 control panel features an

LCD touch-screen, allowing access to all

operational inputs and outputs.This

display supports eleven languages:

English, Chinese, Dutch, French, German,

Italian, Japanese, Korean, Portugese,

Spanish andThai.

— Average line current

— Outdoor air temperature

— Start/stop differential timers

— Auto/Manual mode for EXV, slide

valve, and head pressure control

— Pump status and override

— Chilled water reset, start point, ratio,

and outdoor start point

— External setpoints, including:

- chilled water

- Oil pressure

- Flow switch status

- EXV position

- Head pressure control command

- Compressor starts and run-time

- Line phase percent RLA, amps, and

volts

Additional Display Features Include:

• LCD touch-screen with LED backlighting,

for scrolling access to input and output

operating information

•Weather-proof enclosure for reliable

operation in non-standard indoor

environments

• Spin value buttons to allow continuously

variable setpoints when applicable

• Radio and action buttons for easy, one-

time actions and settings

• Single-screen, folder/tab-style display of

all available information on individual

components (evaporator, condenser,

compressor, etc.)

• Automatic and immediate stop

capabilities for standard or immediate

manual shutdown

• Manual override indication

• Password entry/lockout system to

enable or disable display

— Alarm and diagnostic information,

including:

- Flashing alarms with touch-screen

button for immediate address of

alarm condition

- Scrollable list of last ten active

diagnostics

- Specific information on applicable

diagnostic from list of over one-

hundred

- Automatic or manual resetting

diagnostic types

- current limit

- ice building

- base loading

— Display specifics, including:

- date

- format

- time

- display lockout

- display units

- language setting

- Reports, listed on a single tabbed

screen for easy access, including:

• ASHRAE, containing all guideline 3

report information

• Evaporator

• Condenser

• Compressor

RLC-PRC020-EN

Controls

Tracer Summit features standard report

templates listing key operating data for

troubleshooting and verifying

performance. Reports for each type of

Trane chiller and three and six-chiller

systems are also standard. Detailed

reports showing chiller runtimes aid in

planning for preventative maintenance.

LonTalk Communications Interface for

Chillers (LCI-C) provides a generic

Trane Chiller PlantAutomation

Trane’s depth of experience in chillers and

controls makes us a well-qualified choice

for automation of chiller plants using air-

cooled Series R^®chillers^®.The chiller plant

control capabilities of theTraneTracer

Summit^®building automation system are

unequaled in the industry. Our chiller plant

automation software is fully pre-

engineered and tested. It is a standard

software application, not custom

programming which can prove to be

difficult to support, maintain, and modify.

automation system with the LonMark

chiller profile inputs/outputs. In addition to

the standard points,Trane provides other

commonly used network output variables

for greater interoperability with any

automation system. The complete

reference list ofTrane LonTalk points is

available on the LonMark website. Trane

controls or another vendor’s system can

use the predefined list of points with ease

to give the operator a complete picture of

how the system is running.

Swift Emergency Response

We understand the importance of

maintaining chilled water production

while protecting your chillers from costly

damage. If no water flow is detected to a

chiller’s piping, the start sequence is

aborted to protect the chiller.The next

chiller in the sequence is immediately

started to maintain cooling.

Energy Efficiency

Trane chiller plant automation intelligently

sequences starting of chillers to optimize

the overall chiller plant energy efficiency.

Individual chillers are designated to

operate as base, peak, or swing based on

capacity and efficiency. Sophisticated

software automatically determines which

chiller to run in response to current

conditions.The software also

Hardwire Points

Remote devices wired from the control

panel are another reliable method of

providing auxiliary control to a building

automation system. Inputs and outputs

can be communicated via a typical 4-20

mA electrical signal (or an equivalentVdc

signal of 0-10 or 2-10) or by utilizing

contact closures.

In the event of a problem, the operator

receives an alarm notification and

diagnostic message to aid in quick and

accurate troubleshooting. A snapshot

report showing system status just prior to

an emergency shutdown helps operators

determine the cause. If emergency

conditions justify an immediate manual

shutdown, the operator can override the

automatic control.

automatically rotates individual chiller

operation to equalize runtime and wear

between chillers.

• External ChilledWater Setpoint

• External Current Limit Setpoint

• Condenser-RegulatingValve Control

• Percent of Full Run Load Amps Output

• Condenser Pressure Output

Trane chiller plant automation enables

unique energy-saving strategies. An

example is controlling pumps, and chillers

from the perspective of overall system

energy consumption.The software

intelligently evaluates and selects the

lowest energy consumption alternative.

Integrated Comfort^™Capabilities

When integrated with aTracer Summit

building management system

performing building control,Trane chiller

plant automation coordinates withTracer

Summit applications to optimize the total

building operation.With this system

option, the full breadth ofTrane’s HVAC

and controls experience are applied to

offer solutions to many facility issues. If

your project calls for an interface to other

systems,Tracer Summit can share data

via BACnet^™, the ASHRAE open systems

protocol.

• Refrigerant Monitor Input

• Programmable Relays

Allows the selection of 4 relay outputs

from a list of eight different default

settings: Alarm-Latching, Alarm-Auto

Reset, General Alarm,Warning, Chiller

Limit Mode, Compressor Running, Head

Pressure Relief Request, andTracer

Control. These contact closures may be

used to trigger jobsite supplied audible or

visual alarms

Regulatory Compliance Documentation

Comprehensive documentation of

refrigerant management practices is now

a fact of life.Trane chiller plant automation

generates the reports mandated in

ASHRAE Guideline 3.

Keeping Operators Informed

A crucial part of efficiently running a

chiller plant is assuring that the

LonTalk Chiller Controls

• Ice Making Control

operations staff is instantly aware of

what is happening in the plant. Graphics

showing schematics of chillers, piping,

pumps, and towers clearly depict the

chiller plant system, enabling building

operators to easily monitor overall

conditions. Status screens display both

current conditions and upcoming

automated control actions to add or

subtract chiller capacity. Series R^™and

other chillers can be monitored and

controlled from a remote location.

LonTalk is a communications protocol

developed by the Echelon Corporation.

The LonMark association develops

control profiles using the LonTalk

communication protocol. LonTalk is a unit

level communications protocol, unlike

BACNet used at the system level.

Provides an interface with ice making

control system and safeties, enabling

both ice making and daytime comfort

cooling

• ChilledWaterTemperature Reset

Supplies controls, sensors and safeties to

reset the chilled water temperature

setpoint based upon return water

temperature (standard) or outdoor air

temperature (optional)

RLC-PRC020-EN

Application

Considerations

Condenser WaterTemperatures

Reduced sensitivity to condenser water

startup temperatures is one major

enhancement in the newest-generation

water-cooled Series R chiller.With the

model RTHD chiller, a condenser water

control method is necessary only if the

unit starts with entering water

temperatures below 55°F (12.8°C), or

between 45°F (7.2°C) and 55°F (12.8°C),

when a temperature increase of 1°F

(0.56°C) per minute to 55°F (12.8°) is not

possible.

power input required, but the ideal

temperature for optimizing total system

power consumption will depend on the

overall system dynamics. From a system

perspective, some improvements in

chiller efficiency may be offset by the

increased tower fan and pumping costs

required to achieve the lower tower

temperatures. Contact your localTrane

systems solution provider for more

information on optimizing system

performance.

Some basic rules should be followed

whenever using these system design and

operational savings methods with the

RTHD.The proper location of the chilled

water temperature control sensor is in

the supply (outlet) water.This location

allows the building to act as a buffer, and

it assures a slowly changing return water

temperature. If there is insufficient water

volume in the system to provide an

adequate buffer, temperature control can

be lost, resulting in erratic system

operation and excessive compressor

cycling.To ensure consistent operation

and tight temperature control, the chilled

water loop should be at least two

minutes. If this recommendation cannot

be followed, and tight leaving water

temperature control is necessary, a

storage tank or larger header pipe should

be installed to increase the volume of

water in the system.

The minimum acceptable refrigerant

pressure differential between condenser

and evaporator is 23 psid.The chiller

control system will attempt to obtain and

maintain this differential at startup, but for

continuous operation a design should

maintain a 25°F (13.9°C) differential from

evaporator leaving water temperature to

condenser leaving water temperature.

When the application requires startup

temperatures below the prescribed

minimums, a variety of options are

available.To control a 2-way or 3-way

valve,Trane offers a Condenser

RegulatingValve Control option for the

CH530 controls.This option enables the

CH530 controls to send a signal for

opening and closing the valve as

necessary to maintain chiller differential

pressure.The 2-way valves are available

as a ship-with option.Tower bypass is

also a valid control method if the chiller

temperature requirements can be

maintained.

Variable Evaporator Flow and Short

EvaporatorWater Loops

For variable primary flow applications,

the rate of chilled water flow change

should not exceed 10 percent of design

per minute to maintain +/-0.5°F (0.28°C)

leaving evaporator temperature control.

For applications in which system energy

savings is most important and tight

temperature control is classified as

+/-2°F (1.1°C), up to 30 percent changes in

flow per minute are possible. Flow rates

should be maintained between the

minimum and maximum allowed for any

particular chiller configuration.

Variable evaporator flow is an energy-

saving design strategy which has quickly

gained acceptance as advances in chiller

and controls technology have made it

possible.With its linear unloading

compressor design and advanced CH530

controls, the RTHD has excellent

capability to maintain leaving water

temperature control within +/-0.5°F

(0.28°C) , even for systems with variable

evaporator flow and small chilled water

volumes.

Trane Series R chillers start and operate

successfully and reliably over a range of

load conditions with controlled entering

condenser water temperature. Reducing

the condenser water temperature is an

effective method of lowering chiller

RLC-PRC020-EN

Application

Considerations

Series Chiller Arrangements

Like series arrangements on the

Water Pumps

Another energy-saving strategy is to

design the system around chillers

arranged in series, on the evaporator,

condenser, or both.The actual savings

possible with such strategies depends on

the application dynamics and should be

researched by consulting yourTrane

Systems Solutions Representative and

applying theTrane System Analyzer

program. It is possible to operate a pair of

chillers more efficiently in a series chiller

arrangement than in a parallel

evaporator, series arrangements on the

condenser may enable savings.This

approach may allow reductions in pump

and tower installation and operating

costs. Maximizing system efficiency

requires that the designer balance

performance considerations for all

system components; the best approach

may or may not involve multiple chillers,

or series arrangement of the evaporators

and/or condensers. This ideal balance of

design integrity with installation and

operating cost considerations can also be

obtained by consulting aTrane

Where noise limitation and vibration-free

operation are important,Trane strongly

encourages the use of 1750-rpm (60 Hz),

1450-rpm (50 Hz) pumps. Specifying or

using 3600-rpm (60 Hz), 3000-rpm (50 Hz)

condenser water and chilled water

pumps must be avoided, because such

pumps may operate with objectionable

levels of noise and vibration. In addition, a

low frequency beat may occur due to the

slight difference in operating rpm

between 3600-rpm (60 Hz), 3000-rpm

(50 Hz) water pumps and Series R chiller

motors. Important Note:The chilled water

pump must not be used to stop the chiller.

arrangement. It is also possible to achieve

higher entering-to-leaving chiller

differentials, which may, in turn, provide

the opportunity for lower chilled water

design temperature, lower design flow,

and resulting installation and operational

cost savings.TheTrane screw

representative and applying theTrane

System Analyzer program.

Acoustic Considerations

Water Treatment

For chiller sound ratings, installation tips,

and considerations on chiller location,

pipe isolation, etc., refer to theTrane

Water-Cooled Series R Chillers Sound

Ratings and Installation Guide. Using the

information provided in this bulletin,

contact a certified sound consultant to aid

in proper mechanical room design and

treatment.

The use of untreated or improperly

treated water in chillers may result in

scaling, erosion, corrosion, and algae or

slime buildup. It is recommended that the

services of a qualified water treatment

specialist be engaged to determine what

treatment, if any, is advisable.Trane

assumes no responsibility for the results

of using untreated or improperly treated

water.

compressor also has excellent

capabilities for “lift”, which affords an

opportunity for savings on the

evaporator and condenser water loops.

Figure 1. Typical series chiller arrangement

RLC-PRC020-EN

Selection

Procedure

Trane Series R chiller performance is

rated in accordance with the ARI

Standard 550/590-2003 Certification

Program. Chiller selection assistance and

performance information can be

obtained by using the Series R chiller

selection program, available through

localTrane sales offices.

Part Load Performance

Actual air-conditioning system loads are

frequently less than full-load design

conditions. Depending on the number of

chillers on the job and the load profile,

chillers may operate at full load a small

percentage of the time.With their

excellent part-load performance

characteristics and highly energy-efficient

operation, Series R chillers can provide

significant operating savings at these

part-load conditions.

Performance

The computerized Series R chiller

selection program provides performance

data for each possible chiller selection at

both full-load and part-load design points,

as required.

System Considerations

Part-load chiller operation is frequently

associated with reduced condenser

water temperatures. However, rather

than focusing only on the chiller, it is

important to balance these temperatures

to achieve the most efficient system

operation possible. At part-load

It should be noted that changing the

number of water passes or the water

flow rates will generally alter the

performance of a particular chiller.To

attain maximum benefit from the wide

range of chiller models and options

available, designers are encouraged to

first develop performance specifications

and then use the chiller selection program

to optimize all selections.This will help

ensure selection of the compressor-

evaporator-condenser combination that

most closely meets the job requirements.

To optimize system performance, all

selections should also be balanced with

other system components.

operation, the heat rejected to the cooling

tower is less than at full-load operation.

Part-load chiller operation is also typically

associated with reduced outside wet bulb

temperatures, resulting in improved

cooling tower performance.The net result

of reduced heat rejection and lower wet

bulb temperatures can be cooler

condenser water entering the chiller,

ultimately improving unit performance.

However, this does not improve pump or

tower efficiency.To achieve the most

efficient system operation possible, it is

best to minimize the total power draw of

the chiller, tower, and pumps, which may

not mean limiting the condenser water

temperature to what the tower can

provide.To determine specific unit and

system part-load performance for chiller

selection purposes, use the Series R

chiller computer selection program or

contact the localTrane sales office.

Fouling Factors

ARI Standard 550 includes a definition of

clean tube fouling.The recommended

standard fouling adjustments are 0.0001

hr-sq ft-deg F/Btu (0.0176 sq m-deg C/kW)

for the evaporator and 0.00025 hr-sq ft

deg F/Btu (0.044 sq m-deg C/kW) for the

condenser, from an increment of 0.0000

“clean.” Chiller specifications should be

developed using the most current

standard fouling factors.

RLC-PRC020-EN

Selection

Procedure

Unit Performance with Fluid Media

OtherThanWater

Electrical DataTables

Compressor motor electrical data is

provided in the data section for each

compressor size. Rated load amperes

(RLA), locked rotor wye amperes (LRA)

and expected inrush for theWye-delta

and Solid State Starter configurations are

shown.

Series R chillers can be provided with a

wide variety of fluid media other than

water, including ethylene glycol and

propylene glycol— in the evaporator,

condenser or both. Chillers using media

other than water are excluded from the

ARI 550/590-2003 Certification Program,

but are rated in accordance with ARI

Standard 550/590-2003.Trane factory

performance tests are only performed

with water as the cooling and heat-

rejection media.When considering

selection of media other than water,

contact the localTrane sales office for

chiller selections and factory

Although the terms “LRA” and “expected

inrush” are often used interchangeably,

the distinction applied here is that LRA is

the rated inrush for the motor, but

expected inrush is that allowed by the

starter, based on the specific

configuration.

Selecting starters in theWye-delta or

Solid State configuration lowers

expected inrush vs. the Delta (or “across-

the-line”) configuration. A Solid State

Starter configuration lowers the

expected inrush by approximately 50

percent, whileWye-Delta lowers it by

approximately 66 percent.

performance testing information.

Fluid media other than water lowers the

heat transfer coefficient, and therefore

reduces chiller performance. In general, it

is good practice to hold the percent glycol

added to within the minimum allowed by

theTrane selection program, based on

either (a) unit operating temperatures, or

(b) the operating temperatures the

evaporator or condenser water will

experience under its full range of

conditions. Adding more glycol than

required for the specific application is

equivalent to selecting a less efficient

chiller. Lower-viscosity glycols such as

ethylene will have less adverse impact

on chiller performance than higher-

viscosity glycols such as propylene.

The RLA is based on the motor’s

performance when reaching full rated

horsepower.The kW rating of the motor

will equal or exceed the kW requirement

indicated by the Series R computer

selection program at design conditions. If

motor kW draw at design conditions is

less than the kW rating of the motor, the

RLA at design conditions is determined

by multiplying the motor RLA (at the

desired voltage) by this ratio: design kW/

motor kW rating.This calculation is

performed within the Series R chiller

computer selection program, making

RLA available as part of the design

predictions. Predicted values include

power factor variation from point to point.

Evaporator and Condenser Pressure

Drop

Pressure drop data is determined by the

Series R chiller computer selection

program available through localTrane

sales offices.

A voltage utilization range is tabulated for

each voltage listed. Series R chillers are

designed to operate satisfactorily over a

utilization range of 10 percent of the

standard design voltages: (a) 200V, 230V,

380V, 460V, and 575V for 60 Hertz, 3-

phase, and (b) 380V, 400V,

Dimensional Drawings

Dimensional drawings provided for

selection purposes illustrate overall

measurements of the unit.The

recommended service clearances are

those required to easily service the

Series R chiller.

415V for 50 Hertz, 3-phase.

All catalog dimensional drawings are

subject to change, and current submittal

drawings should be referenced for more

detailed dimensional information.

Dimensional drawings are also available

from the selection program. Contact the

localTrane sales office for submittal

information.

RLC-PRC020-EN

Model

Nomenclature

RTH

10,11

1,2,3 4

13 14

26 27

Digits 01, 02, 03 – Series R^™

Digit 09 – Specials

Digit 18 – Evaporator Water Connection

L = Left Hand Evaporator Connection

R = Right Hand Evaporator Connection

RTH = Series R

X = No specials

C = All specials denoted by digits elsewhere

S = Uncategorized special not denoted by

other digits

Digit 04 – Dev Sequence

D = 4th Major Development

Digit 19 – Evaporator Connection Type

A = Standard Grooved Pipe

Digit 05 – Design Control

U = WCBU

Digits 10, 11 – Design Sequence

** = First Design, etc. increment when parts

are affected for service purposes

Digit 20 – Evaporator Waterside Pressure

L = 150 psi

H = 300 psi

Digit 06 – Compressor Frame

B = B Compressor

Digit 12 – Agency Listing

X = No agency listing

U = C/UL

C = C Compressor

Digit 21 – Condenser

B = B Frame

D = D Compressor

E = E Compressor

D = D Frame

Digit 13 – Pressure Vessel Code

A = ASME

L = Chinese Pressure Vessel Code

E = E Frame

Digit 07 – Compressor Capacity

1 = Smaller Capacity for Frame

2 = Larger Capacity for Frame

3 = 50Hz Capacity

F = F Frame

G = G Frame

Digit 14 – Evaporator Frame

B = B Frame

Digit 22 – Condenser Capacity

1 =Tube count #1

Digit 08 – Unit Power Supply

A = 200V/60Hz/3Ph power

C = 230V/60Hz/3Ph power

D = 380V/60Hz/3Ph power

R = 380V/50Hz/3Ph power

T = 400V/50Hz/3Ph power

U = 415V/50Hz/3Ph power

F = 460V/60Hz/3Ph power

H = 575V/60Hz/3Ph power

C = C Frame

2 =Tube count #2

D = D Frame

3 =Tube count #3

E = E Frame

4 =Tube count #4

F = F Frame

5 =Tube count #5

G = G Frame

Digit 23 – Condenser Tube Type

A = Enhanced Fin Copper

B = Smooth Bore Copper

Digit 15 – Evaporator Capacity

1 =Tube count #1

2 =Tube count #2

C = Smooth Bore 90/10 CU/NI

3 =Tube count #3

4 =Tube count #4

Digit 24 – Condenser Passes

2 = 2 Pass

5 =Tube count #5

6 =Tube count #6

Digit 25 – Condenser Water Connection

L = Left Hand Connection

R = Right Hand Connection

Digit 16 – Evaporator TubeType

A = Enhanced Fin Copper

Digit 17 – Evaporator Water Pass

Configuration

2 = 2 pass

Digit 26 – Condenser Connection Type

A = Standard Grooved Pipe

C = Marine

3 = 3 pass

4 = 4 pass

Digit 27 – Condenser Waterside Pressure

L = 150 psi

H = 300 psi

RLC-PRC020-EN

Model

Nomenclature

444

28 29 30 31 32 33 34 35 36 37 38 39 40,41,42 43 44 45 46 47 48

49 50

52 53 54

Digit 28 – Condenser Leaving Water

Temperature

Digit 48 – External Chilled Water and Current

Limit Setpoint

X = None

4 = 4-20mA input

2 = 2-10Vdc

Digit 38 – Factory Test

X = Standard Test

C = Witness Test

A = Standard

D = Performance Test

Digit 29 – Refrigerant Specialties

X = No Refrigerant Isolation Valves

V = With Refrigerant Isolation Valves

Digit 39 – StarterType

Y = Wye Delta Closed Transition Starter

A = Solid State Starter

Digit 49 – External Base Loading

X = None

4 = 4-20mA input

2 = 2-10Vdc input

Digit 30 – Oil Cooler

X = Without Oil Cooler

C = With Oil Cooler

Digits 40, 41, 42 – Design RLA (for starter)

*** = Selection Assigned

Digit 50 – Icemaking

X = None

A = Icemaking with Relay

B = Icemaking without Relay

Digit 31 – Thermal Insulation

X = No Insulation

Q = Factory Installed Insulation

Digit 43 – Power Line Connection Type

A =Terminal Blocks

B = Mechanical Disconnect Switch

D = Circuit Breaker

F = High Interrupt Circuit Breaker

H = Ground Fault Circuit Breaker

J = Ground Fault High Interrupt Circuit

Breaker

Digit 32 – Acoustic Insulation

X = No Insulation

A = Standard Insulation

Digit 51 – Programmable Relays

X = None

R = With

Digit 33 – Label and Literature Language

Digit 52 – Chilled Water Reset

X = Chilled Water Reset – Return Water

T = Chilled Water Reset – Outdoor Air

Temperature

C = Spanish

E = English

F = French

Digit 44 – Enclosure Type

A = NEMA 1

Digit 45 – Under/Over Voltage Protection

X = None

Digit 34 – Safety Devices

Digit 53 – Control Outputs

X = Standard

X = None

U = With Under/Over Voltage Protection

V = Condenser Regulating Valve Control &

Digit 35 – Factory Charge

A = Factory Refrigerant Charge (134a)

B = Factory Nitrogen Charge

Percent RLA

Digit 46 – Operator Interface Language

A = Dyna-View/English

B = Dyna-View/French

C = Dyna-View/Italian

D = Dyna-View/Spanish

E = Dyna-View/German

F = Dyna-View/Dutch

P = Condenser Pressure (% HPC) & Percent

RLA

D = Chiller Differential Pressure & Percent

RLA

Digit 36 – Shipping Package

A = No Skid (standard)

B = Shrink Wrap

C = Skid

D = Skid + Shrink Wrap

J = Special

Digit 54 – Refrigerant Monitor Input

X = None

A = 100 ppm / 4-20mA

B = 1000 ppm / 4-20mA

C = 100 ppm / 2-10Vdc

D = 1000 ppm / 2-10Vdc

G = Dyna-View/Traditional Chinese

H = Dyna-View/Simple Chinese

J = Dyna-View/Japanese

K = Dyna-View/Portuguese

L = Dyna-View/Korean

Digit 37 – Flow Switch

X = No Flow Switch

M = Dyna-View/Thai

A = Evaporator (NEMA 1)

B = Evaporator and Condenser (NEMA 1)

C = Evaporator (NEMA 4)

D = Evaporator and Condenser (NEMA 4)

Digit 47 – Digital Communication Interface

X = None

4 =Tracer Interface

5 = LCI-C (LonTalk)

RLC-PRC020-EN

General Data

Nominal Data

Nominal Compressor

Tonnage (60 Hz)

175-200

200-225

225-275

275-325

325-400

375-450

N/A

Tonnage (50 Hz)

125-150

150-175

175-225

225-275

275-325

300-350

325-375 375-450

Notes:

1. Chiller selections can be optimized through the use of the ARI-Certified Series R selection program and by contacting your local

Trane sales office.

General Data

Evaporator

Water Storage

Condenser

Water Storage

Refrigerant

Charge

Compressor

Evaporator

Code

Condenser

Code

Refrigerant

Type

Code

Gallons

Liters

155

208

170

220

170

197

310

197

295

405

261

386

515

545

280

405

545

602

280

405

545

602

Gallons

Liters

106

117

110

129

110

121

226

121

178

231

166

216

299

344

178

231

299

367

178

231

299

367

186

222

186

222

238

222

284

216

284

---

318

216

284

---

318

216

284

---

HFC-134a

410

490

410

490

525

490

625

475

625

---

700

475

625

---

700

475

625

---

107

102

136

144

107

144

159

D1²

D2/D3

D2/D3¹

D2/D3²

107

144

159

700

318

Notes:

1. 50 Hz units only.

2. 60 Hz units only.

RLC-PRC020-EN

General Data Water Flow Rates

Minimum/Maximum Evaporator Flow Rates (Gallons/Minute )

TwoPass

Three Pass

Four Pass

Evaporator

Code

Nominal

Max Conn Size (In.)

Nominal

Max Conn Size (In.)

Nominal

Conn Size (In.)

Min

253

288

320

347

415

450

486

351

293

450

563

604

—-

Min

168

192

213

232

275

300

324

234

196

300

376

404

505

550

622

Min

—-

379

411

466

Max

—-

1104

1266

1412

1531

1812

1980

2131

1542

1287

1980

2478

2667

—-

736

844

941

—-

1022

1206

1320

1417

1028

860

1320

1655

1780

2218

2413

2732

—-

1666

1807

2050

—-

Notes:

1. Minimum flow rates are based on water only.

2. All water connections are grooved pipe.

Minimum/Maximum Evaporator Flow Rates (Liters/Second)

TwoPass

Three Pass

Four Pass

Evaporator

Code

Nominal

Max Conn Size (mm) Min

Nominal

Max Conn Size (mm) Min

Nominal

Max Conn Size (mm)

Min

—-

200

250

—-

104

112

140

152

172

150

200

250

—-

105

114

129

—-

200

114

125

134

125

156

168

—-

Notes:

1. Minimum flow rates are based on water only.

2. All water connections are grooved pipe.

Minimum/Maximum Condenser Flow Rates

(Gallons/Minute)

(Liters/Second)

Two Pass

Condenser

Code

Nominal

Condenser

Code

Nominal

Min

193

212

193

212

291

316

325

245

206

375

355

385

444

535

589

Max

850

935

850

935

1280

1390

1420

1080

910

1650

1560

1700

1960

2360

2600

Conn Size (In.)

Min

Max Conn Size (mm)

104

107

124

149

164

150

200

Notes:

1. Minimum flow rates are based on water only.

2. All water connections are grooved pipe.

RLC-PRC020-EN

General Data

Brine Flow Rates

Minimum/Maximum Evaporator Flow Rates (GPM)

TwoPass

Three Pass

Four Pass

Evaporator

Code

Nominal

Max Conn Size (In.)

Nominal

Max Conn Size (In.)

Nominal

Conn Size (In.)

Min

303

346

375

498

541

584

422

352

487

676

725

—-

Min

200

233

254

276

330

357

389

281

233

357

454

487

606

660

747

Min

—-

454

492

557

Max

—-

1104

1266

1412

1531

1812

1980

2131

1542

1287

1980

2478

2667

—-

736

844

941

—-

1022

1206

1320

1417

1028

860

1320

1655

1780

2218

2413

2732

—-

1666

1807

2050

—-

Notes:

1. Minimum flow rates are based on brine solution.

2. All water connections are grooved pipe.

Minimum/Maximum Evaporator Flow Rates (Liters/Second)

TwoPass

Three Pass

Four Pass

Evaporator

Code

Nominal

Max Conn Size (mm) Min

Nominal

Max Conn Size (mm) Min

Nominal

Max Conn Size (mm)

Min

200

250

—-

104

112

140

152

172

150

200

250

—-

105

114

129

—-

200

—-

114

125

134

125

156

168

—-

Notes:

1. Minimum flow rates are based on brine solution.

2. All water connections are grooved pipe.

Minimum/Maximum Condenser Flow Rates

(Liters/Second)

(GPM)

Two Pass

Condenser

Code

Nominal

Condenser

Code

Nominal

Conn Size (In.)

Min

Max Conn Size (mm)

104

107

124

149

164

Min

230

255

230

255

350

380

390

295

250

450

430

460

530

650

710

Max

850

935

850

935

1280

1390

1420

1080

910

1650

1560

1700

1960

2360

2600

150

200

Notes:

1. Minimum flow rates are based on brine solution.

2. All water connections are grooved pipe.

1. Minimum flow rates are based on brine solution.

2. All water connections are grooved pipe.

RLC-PRC020-EN

Electrical Data

and Connections

Compressor Motor Electrical Data (60 Hertz)

NominalVoltage

Voltage

200

180/

220

230

208/

254

174

484

818

2617

249

698

380

342/

418

174

291

488

1561

249

421

460

414/

506

174

241

400

1280

249

349

575

516/

633

174

193

329

1053

249

279

375

1162

329

367

612

1984

Compressor

Code

Utilization Range

Max kW

174

B1, B2

RLA @ Max kW

LRAY

557

970

LRAD

Max kW

RLA @ Max kW

LRAY

LRAD

Max kW

RLA @ Max kW

LRAY

3103

249

C1, C2

812

1173

3634

329

888

1690

5477

936

558

469

2901

329

888

1532

4966

1727

329

549

850

2755

1453

329

455

730

2366

D1, D2

Notes:

LRAD

1. See Selection Procedure Section for details.

2.The RLA @ Max kW is based on the performance of the motor developing full rated horsepower.

3. Electrical component sizing should be based on actual jobsite operating conditions.This factor can be obtained through the

use of the Series R chiller selection program available through localTrane sales offices.

Compressor Motor Electrical Data (50 Hertz)

NominalVoltage

Voltage

380

342/

418

139

233

391

1229

201

349

456

1414

271

455

711

400

360/

440

145

233

412

1296

209

349

480

1488

280

455

748

2424

301

488

748

2424

415

374/

457

148

233

428

1348

213

349

498

1544

284

455

776

2515

306

488

776

2515

Compressor

Code

Utilization Range

Max kW

RLA @ Max kW

LRAY

B1, B2

LRAD

Max kW

RLA @ Max kW

LRAY

C1, C2

LRAD

Max kW

D1, D2, D3

RLA @ Max kW

LRAY

LRAD

2303

288

488

711

Max kW

RLA @ Max kW

LRAY

LRAD

2303

Notes:

1. See Selection Procedure Section for details.

2.The RLA @ Max kW is based on the performance of the motor developing full rated horsepower.

3. Electrical component sizing should be based on actual jobsite operating conditions.This factor can be obtained through the

use of the Series R chiller selection program available through localTrane sales offices.

Electrical Connections

Starter Panel

Connection

Selection

RLA

Lug Size

L1-L3 (Each Phase)

(2) #4-500 MCM

(4) 4/0-500 MCM

(1) #4-350 MCM

(2) 2/0-250 MCM

(2) 3/0-350 MCM

(2) #1-500 MCM

(4) 4/0-500 MCM

Terminals Only

000-760

761-888

000-185

186-296

297-444

445-592

593-888

Main Circuit

Breaker or

Non-Fused

Disconnect Switch

Note:

1. Lug sizes are independent of starter type.

RLC-PRC020-EN

Electrical Data

and Connections

RLC-PRC020-EN

Electrical Data

and Connections

RLC-PRC020-EN

Dimensions and

Weights

Shipping and Operating Weights

Compressor

Code

Evaporator

Code

Condenser

Code

OperatingWeight

ShippingWeight

(lbs)

(kg)

(lbs)

(kg)

9,867

10,554

10,019

10,653

13,397

13,673

15,818

13,672

15,044

17,560

15,385

17,537

20,500

21,065

15,570

18,220

20,700

21,641

15,728

18,356

20,800

4,476

4,787

4,545

4,832

6,077

6,202

7,175

6,201

6,824

7,965

6,978

7,955

9,299

9,555

7,062

8,264

9,389

9,816

7,134

8,326

9,435

9,292

4,215

4,462

4,265

4,515

5,797

5,884

6,676

5,884

6,351

7,334

6,551

7,342

8,437

8,667

6,605

7,629

8,482

8,849

6,677

7,691

8,528

9,837

9,402

9,953

12,780

12,973

14,718

12,972

14,002

16,168

14,443

16,187

18,600

19,107

14,562

16,820

18,700

19,508

14,720

16,956

18,800

D2, D3

21,786

9,882

19,653

8,914

Notes:

1. All weights +- 3%.

2. Shipping weights include standard 150 psig water boxes, refrigerant charge, and oil charge.

3. Operating weights include refrigerant, oil, and water charges.

RLC-PRC020-EN

Dimensions and

Weights

BBB Configuration

Recommended Clearances

36" (914 mm)

Front

Back

36" (914 mm)

Either End

Other End*

Top

36" (914 mm)

108" (2743 mm)

36" (914 mm)

* Clearance for tube removal

Note:

1. Dimensions are based on 3 Pass Evap / 2 Pass

Cond and LH/LH water connections. Refer to

submittals for exact configuration.

2. Refer to the Nominal Capacity Data table in the

General Data section for capacity ranges of each

compressor.

RLC-PRC020-EN

Dimensions and

Weights

BCD Configuration

Recommended Clearances

36" (914 mm)

Front

Back

36" (914 mm)

Either End

Other End*

Top

36" (914 mm)

126" (3200 mm)

36" (914 mm)

* Clearance for tube removal

Note:

1. Dimensions are based on 3 Pass Evap / 2 Pass

Cond and LH/LH water connections. Refer to

submittals for exact configuration.

2. Refer to the Nominal Capacity Data table in the

General Data section for capacity ranges of each

compressor.

RLC-PRC020-EN

Dimensions and

Weights

CDE, DDE, EDE Configuration

Recommended Clearances

Front

Back

Either End

Other End*

36" (914 mm)

108" (2743 mm)

36" (914 mm)

Top

* Clearance for tube removal

Note:

1. Dimensions are based on 3 Pass Evap / 2 Pass

Cond and LH/LH water connections. Refer to

submittals for exact configuration.

2. Refer to the Nominal Capacity Data table in the

General Data section for capacity ranges of each

compressor.

RLC-PRC020-EN

Dimensions and

Weights

CEF Configuration

Recommended Clearances

36" (914 mm)

Front

Back

36" (914 mm)

Either End

Other End*

Top

36" (914 mm)

126" (3200 mm)

36" (914 mm)

* Clearance for tube removal

Note:

1. Dimensions are based on 3 Pass Evap / 2 Pass

Cond and LH/LH water connections. Refer to

submittals for exact configuration.

2. Refer to the Nominal Capacity Data table in the

General Data section for capacity ranges of each

compressor.

RLC-PRC020-EN

Dimensions and

Weights

CFF, DFF, EFF Configuration

Recommended Clearances

Front

Back

Either End

Other End*

36" (914 mm)

126" (3200 mm)

36" (914 mm)

Top

* Clearance for tube removal

Note:

1. Dimensions are based on 3 Pass Evap / 2 Pass

Cond and LH/LH water connections. Refer to

submittals for exact configuration.

2. Refer to the Nominal Capacity Data table in the

General Data section for capacity ranges of each

compressor.

RLC-PRC020-EN

Dimensions and

Weights

DGG, EGG Configuration

Recommended Clearances

Front

Back

Either End

Other End*

36" (914 mm)

126" (3200 mm)

36" (914 mm)

Top

* Clearance for tube removal

Note:

1. Dimensions are based on 3 Pass Evap / 2 Pass

Cond and LH/LH water connections. Refer to

submittals for exact configuration.

2. Refer to the Nominal Capacity Data table in the

General Data section for capacity ranges of each

compressor.

RLC-PRC020-EN

Mechanical

Specifications

General

All water pass arrangements are

The display will identify the fault, indicate

date, time, and operating mode at time of

occurrence, and provide type of reset

required and a help message.The

diagnostic history will display the last ten

diagnostics with their times and dates of

occurrence.

Exposed metal surfaces are painted with

air-dry beige, direct-to-metal, single-

component paint. Each unit ships with full

operating charges of refrigerant and oil.

Molded neoprene isolation pads are

supplied for placement under all support

points. Startup and operator instruction

by factory-trained service personnel are

included.

available with grooved connections (150

or 300 psig waterside). All connections

may be either right- or left-handed.

Waterside shall be hydrostatically tested

at 1.5X design working pressure.

Refrigerant Circuit

An electronically controlled expansion

valve is provided to maintain proper

refrigerant flow.

Clear Language Display Panel

Factory-mounted to the control panel

door, the operator interface has an LCD

touch-screen display for operator input

and information output.This interface

provides access to the following

information: evaporator report,

condenser report, compressor report,

ASHRAE Guideline 3 report, operator

settings, service settings, service tests,

and diagnostics. All diagnostics and

messages are displayed in “clear

language.”

Compressor and Motor

Unit Controls (CH530)

The unit is equipped with a semi-

hermetic, direct-drive, 3600-rpm (3000

rpm @ 50 Hz) rotary compressor that

includes a capacity control slide valve, oil

sump heater, and differential pressure

refrigerant oil flow system. Four

pressure-lubricated, rolling-element

bearing groups support the rotating

assembly.

The microprocessor-based control panel

is factory-installed and factory-tested.The

control system is powered by a control

power transformer, and will load and

unload the chiller through adjustment of

the compressor slide valve.

Microprocessor-based chilled water reset

based on return water is standard.

The CH530 microprocessor automatically

acts to prevent unit shutdown due to

abnormal operating conditions

associated with low evaporator

refrigerant temperature, high condensing

temperature, and/or motor current

overload. If an abnormal operating

condition continues and the protective

limit is reached, the machine should shut

down.

The motor is a suction gas-cooled,

hermetically sealed, two-pole, squirrel

cage induction-type.

Data contained in available reports

includes:

•Water and air temperatures

• Refrigerant levels and temperatures

• Oil pressure

• Flow switch status

• EXV position

• Head pressure control command

• Compressor starts and run-time

• Line phase percent RLA, amps, and

volts

Unit-Mounted Starter

The unit is supplied with a NEMA 1 type

enclosure with top power-wiring access

and three-phase, solid state overload

protection.The starter is available in a

Wye-Delta configuration, factory-

mounted and fully pre-wired to the

compressor motor and control panel. A

factory-installed, factory-wired 600VA

control power transformer provides all

unit control power (120VAC secondary)

and CH530 module power (24VAC

secondary). Optional starter features

include circuit breakers, ground fault

circuit breakers, and mechanical, non-

fused disconnects.

The panel includes machine protection

shutdown requiring manual reset for the

following conditions:

• low evaporator refrigerant temperature

and pressure

• high condenser refrigerant pressure

• low oil flow

• critical sensor or detection circuit faults

• motor current overload

• high compressor discharge temperature

• lost communication between modules

• electrical distribution faults: phase loss,

phase imbalance, or phase reversal

• external and local emergency stop

• starter transition failure

All necessary settings and setpoints are

programmed into the microprocessor-

based controller via the operator

interface.The controller is capable of

receiving signals contemporaneously

from a variety of control sources, in any

combination, and priority order of control

sources can be programmed.The control

source with priority determines active

setpoints via the signal it sends to the

control panel. Control sources may be:

• the local operator interface (standard)

• a hard-wired 4-20 mA or 2-10VDC

signal from an external source

(interface optional; control source not

supplied)

Evaporator and Condenser

Shells are carbon steel plate.The

evaporator and condenser are designed,

tested, and stamped in accordance with

ASME Code for refrigerant-side/

working-side pressure of 200 psig.

The panel also includes machine

protection shutdown with automatic

reset for the following correctable

conditions:

• momentary power loss

• under/over voltage

All tube sheets are made of carbon steel;

tubes are mechanically expanded into

tube sheets and mechanically fastened to

tube supports. Evaporator tubes are 1.0-

inch (25.4 mm) diameter and condenser

tubes are 0.75-inch

(19.05 mm) diameter. Both types can be

individually replaced. Standard tubes are

externally finned, internally enhanced

seamless copper with lands at all tube

sheets.

• Generic BAS (optional points; control

source not supplied)

• LonTalk LCI-C (interface optional; control

source not supplied)

• loss of evaporator or condenser water

flow

•TraneTracer Summit^™system (interface

optional)

When a fault is detected, the control

system conducts more than 100

diagnostic checks and displays results.

RLC-PRC020-EN

ConversionTable

RLC-PRC020-EN

Literature Order Number

File Number

RLC-PRC020-EN

PL-RF-RLC-000-PRC020-EN-0606

RLC-PRC020-EN-00406

Inland

Supersedes

Trane

A business ofAmerican Standard Companies

www.trane.com

Stocking Location

For more information, contact

your local sales office or

e-mail us at [email protected].

Trane has a policy of continuous product and product data improvement and reserves the right to change design

and specifications without notice.

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