Trane RTAA-240 User Manual

Library Service Literature
Product Section Refrigeration
Product Rotary liquid Chillers – Air-Cooled
Model RTAA
Literature Type Installation, Operation, Maintenance
Sequence 3
Date December 1991
File No. SV-RF-RLC-RTAA-IOM-3-1291
Supersedes
Installation RTAA-IOM-3
Operation
Maintenance
Since The Trane Company has a policy of continuous product improvement, it reserves the right to change
specifications and design without notice. The installation and servicing of the equipment referred in this booklet
should be done by qualified, experienced technicians.
Air-Cooled
Series R
®
Rotary Liquid
Chillers
“CO” and Later Design Sequence
Packaged Air-Cooled Chiller,
RTAA 130-400
Remote Evaporator Air-Cooled Chiller,
RTAA 130-200
Models
RTAA-130 RTAA-170 RTAA-240 RTAA-340
RTAA-140 RTAA-185 RTAA-270 RTAA-370
RTAA-155 RTAA-200 RTAA-300 RTAA-400
Part No. X39560468-01

Trane RTAA-240 Specifications

General

Model	RTAA-240
Voltage	460V
Phase	3
Cooling Capacity	240 tons
Voltage/Phase/Frequency	460V/3/60Hz

Summary

General Information

Unit Inspection

Verify unit correctness and property equipment upon delivery.

Inspection Checklist

Checklist to protect against loss due to transit damage.

Installation - Mechanical Packaged Unit and Units with Remote Evaporator Option

Location Requirements

Foundation

Requirements for the unit's mounting pad or concrete foundation.

Clearances

Unit Isolation and Leveling

Evaporator Water Piping

Water Treatment

Domestic Water Heater Piping

Freeze Protection

Protecting the domestic water heater from freezing.

Installation - Mechanical Remote Evaporator Interconnecting Refrigerant Piping

System Configuration

Line Sizing

Liquid Line Sizing

Procedures for sizing liquid refrigerant lines.

Suction Line Sizing

Leak Test and Evacuation

Refrigerant Charge Determination

Calculating the correct refrigerant charge for the system.

Oil Charge Determination

Calculating the required oil charge for the system.

Installation – Electrical

General Recommendations

Power Supply Wiring

Requirements for sizing and selecting power supply wiring.

Interconnecting Wiring

Chilled Water Pump Interlock and External Auto/Stop for Model RTAA Air-Cooled Series R CenTraVac

Wiring for chilled water pump interlock and external auto/stop functions.

Chilled Water Pump Interlock

External Auto/Stop Wiring

Alarm/Running/Maximum Capacity Indicator Wiring

External Circuit Lockout – Circuit #1

External Circuit Lockout – Circuit #2

External Chilled Water Setpoint (CWS): Remote Resistor/Potentiometer, Voltage Source 2-10 VDC, or Current Source 4-20 mA

1. Remote Resistor/Potentiometer Input (fixed or adjustable)

Connecting remote resistors/potentiometers for setpoint adjustment.

External Current Limit Setpoint (CLS): Remote Resistor/Potentiometer, Voltage Source 2-10 VDC or Current Source 4-20 mA

1. Remote Resistor/Potentiometer Input

Connecting remote resistors/potentiometers for current limit setpoint.

Installation Check List

Receiving

Unit Location and Mounting

Unit Piping

Procedures for flushing and connecting unit water piping.

Electrical Wiring

Connecting power supply and control wiring to the unit.

Pre-Start Checkout

General

Verification of wiring, components, and power supply before startup.

Unit Voltage Power Supply

Unit Voltage Imbalance

Understanding and calculating voltage imbalance for motor protection.

Unit Voltage Phasing

Water System Flow Rates

Water System Pressure Drop

Measuring chilled water pressure drop through the evaporator.

UCM Set-up

Start-Up Procedures

General

Step-by-step guide for starting the unit after installation.

System Superheat

System Subcooling

Periodic Maintenance

General

Refrigerant Emission Control

Weekly Maintenance

Annual Maintenance

Monthly Maintenance

Maintenance

Coil Cleaning