Trane RAUJ-C40 User Manual

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Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning
equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person
could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment.
April 2020
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Installation, Operation, and Maintenance
Split System
Cooling Condensers — 20 to 120 Tons
Remote Chillers — 20 to 120 Tons
RAUJ-C20
RAUJ-C25
RAUJ-C30
RAUJ-C40
RAUJ-C50
RAUJ-C60
RAUJ-C80
RAUJ-D10
RAUJ-D12

Trane RAUJ-C40 Specifications

General

Energy Efficiency Ratio (EER)	11.0
Refrigerant Type	R-410A
Voltage	208/230V
Phase	1
Sound Level (Outdoor)	72 dB(A)
Cooling Capacity	4.0 tons (48, 000 BTU/h)

Summary

Introduction and Safety Information

Warnings, Cautions, and Notices

Defines the three types of safety advisories: WARNING, CAUTION, and NOTICE.

Critical Safety Warnings

Covers field wiring, grounding, and PPE requirements.

Model Number Description

Installation Mechanical

Unit Location, Rigging, and Lifting

Covers placement, isolation, leveling, and safe rigging.

Unit Mounting and Isolation

Details mounting locations, loading, and isolator types.

Refrigerant Piping Requirements and Components

Outlines piping needs and recommended components.

Suction and Liquid Line Components

Details specific components for refrigerant lines.

Thermostatic Expansion Valve (TXV) Selection

Typical Field-Installed Evaporator Piping

Final Refrigerant Pipe Connections and Brazing

Covers final connections and proper brazing techniques.

Leak Testing Procedure

Details critical steps for testing refrigerant system for leaks.

Installation Mechanical — EVP

EVP Chilled Water Piping Requirements

Lists requirements for installing EVP chilled water piping.

EVP Chiller Evaporator Piping and TXV

Illustrates piping for EVP chillers and associated components.

Remote EVP Chiller Water Management

Typical EVP Chiller Water Piping

Braze Plate Chiller and Strainer Maintenance

Details BPHE chiller installation and strainer maintenance.

Freezestat and Final Water Piping Connections

Installation Electrical

Main Electrical Power Wiring and Safety

Covers power supply, wiring, grounding, and safety.

Control Wiring Requirements and Types

Details control wiring for various units and safety warnings.

Low Voltage Wiring and Field Power Wiring

Disconnect Switch Operation and Main Power Wiring

Control Wiring Details and Safety

Variable Air Volume Control (Honeywell W7100A)

Suction Line Thermostat Installation

Night Setback and Controller Operation

Constant Volume Control (Honeywell W973)

Electronic Zone Thermostat Checkout

EVP Chiller Control and Remote Panel

Details EVP chiller control system and remote panel setup.

Proper Field Wiring and Grounding Required!

Emphasizes correct wiring and grounding for EVP systems.

Operating Principles

Unit Operation (VAV Controller)

Economizer Cycle Operation

Chilled Water Temperature Controller

Thermostatic Expansion Valve (TXV) Adjustment

Condenser Fan Sequencing and Operation

Pre-Start Procedures

Initial Unit Checks and System Evacuation

Outlines pre-start checklist and system evacuation.

EVP Chiller and System Evacuation

Specific procedures for EVP chillers and system evacuation.

Standing Vacuum Test

Details the procedure for performing a standing vacuum test.

Discharge Air Controller Checkout

Provides a procedure for checking the W7100A controller.

Discharge Air Controller Checkout (Cont.)

Continues the checkout procedure for the W7100A controller.

Discharge Air Sensor Checkout

Economizer Actuator Checkout

EVP Chiller Control Checkout

Provides checkout procedure for the W7100G chilled water controller.

Chilled Water Sensor Checkout

Master Energy Control Checkout

Zone Thermostat Checkout

Discharge Air Sensor Checkout (Honeywell 6RT1)

Voltage Imbalance and Electrical Phasing

Low Ambient Damper Adjustment

Covers adjustment of low ambient dampers.

EVP Chiller Start-Up Procedures

Details start-up steps for EVP chillers.

Verifying Supply Fan Rotation

Ensures correct fan rotation direction.

System Airflow Measurement

Preliminary Expansion Valve Adjustment

Guides adjustment of expansion valves for proper superheat.

Adding Preliminary Charge

Details the process of adding refrigerant charge.

Compressor Start-Up Procedures

Outlines steps for starting compressors and initial charging.

Compressor Start-Up Procedures (Cont.)

Finalizes charging and operational checks.

Motors Rotating Backward Diagnosis

Subcooling and Superheat Measurement

Compressor Oil and Crankcase Heaters

Pressure Curves and Operating Points

Final System Setup

Covers final checks and recommended operating setpoints.

Maintenance

Monthly Maintenance Tasks

Coil Cleaning Procedures

EVP Remote Evaporator Chiller Maintenance

Refrigerant Handling and Safety

Covers R-410A safety and refrigerant handling warnings.

Compressor Replacement Procedures

Details steps for compressor replacement and oil management.

Electrical Phasing and Suction Restrictors

Fall Restraint and Safety

Wiring Diagrams