Trane RTAC 300 Series User Manual

Installation
Operation
Maintenance
Series R Air-Cooled Helical Rotary
Liquid Chillers
RTAC Plus 140 - 350 Ton (60 Hz)
RTAC Plus 140 - 300 Ton (50 Hz)
SAFETY WARNING
Only qualied 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 specic
knowledge and training. Improperly installed, adjusted or altered equipment by an unqualied 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.
May 2014 RTAC-SVX002A-EN

Trane RTAC 300 Series Specifications

General

Brand	Trane
Model	RTAC 300 Series
Category	Chiller
Language	English

Summary

Installation Mechanical

Installation Responsibilities

Contractor's duties for installing an RTAC unit, including foundation and piping.

Nameplates

Location Requirements

Criteria for selecting and setting the unit's foundation and location.

Foundation

Requirements for providing a rigid, non-warping mounting pad or concrete foundation.

Clearances

Recommended space around the unit for installation and maintenance access.

Unit Isolation and Leveling

Water Pressure Relief Valves

Freeze Protection

Measures to protect the chilled water system from freezing in subfreezing ambient temperatures.

Installation Electrical

Installer-Supplied Components

Power Supply Wiring

Sizing and selection of power supply wiring according to NEC standards.

Control Power Supply

Transformer connection for appropriate control power voltage to the unit.

Chilled Water Flow (Pump) Interlock

Chilled Water Pump Control

External Chilled Water Setpoint (ECWS) Option

External Current Limit Setpoint (ECLS) Option

Operating Principles

Refrigeration Cycle

Overview of the RTAC chiller's refrigeration cycle and pressure-enthalpy diagram.

Compressor

Description of the semi-hermetic, direct-drive rotary type compressor and its operation.

Evaporator

Explanation of the evaporator's falling film design and refrigerant evaporation process.

Oil System

Controls Interface

CH530 Communications Overview

Compressor Screen

Setpoint Screen

Two-part screen listing and allowing modification of available setpoints.

Diagnostic Screen

TechView Interface

Information on using TechView software for chiller service and diagnostics.

Active Chilled Water Subscreen

Active Current Limit Subscreen

Diagnostics

Connecting the Laptop to CH530

Pre-Start Checkout

Installation Checklist

Checklist to verify all installation procedures are complete before unit start-up.

Receiving

Unit Location and Mounting

Inspection of location for service clearances and mounting the unit securely.

Unit Piping

Electrical Wiring

Procedures for connecting unit power supply wiring and related components.

Unit Voltage Power Supply

Checking and ensuring adequate and balanced voltage supply to the unit.

Unit Voltage Phasing

Ensuring correct electrical phase sequence for compressor rotation to prevent damage.

Water System Flow Rates

Establishing balanced chilled water flow through the evaporator within specified rates.

Water System Pressure Drop

CH530 Set-Up

Unit Start-Up Procedures

General

Steps to initiate unit start-up after pre-start checkout completion.

Seasonal Unit Start-Up Procedure

Procedures for closing valves, venting, filling, and checking controls for seasonal start-up.

System Restart After Extended Shut down

Procedures to follow for restarting the unit after a period of shutdown.

Temporary Shutdown And Restart

Extended Shutdown Procedure

Periodic Maintenance

Weekly Maintenance

Maintenance Procedures

Refrigerant and Oil Charge Management

Importance of proper oil and refrigerant charge for unit performance and protection.

R134a Field Charging Procedure

Procedure for charging R134a refrigerant into the unit after electrical power is disconnected.

Factory (initial) Refrigerant Charging Procedure

Procedure for initial charging or recharging after complete refrigerant removal.

Field Refrigerant Charging Procedure

Procedure for adding charge to an undercharged unit or when virtually all oil is removed.

Charge Isolation in the high or low side of system

Refrigerant Filter Replacement Procedure

Oil Charging Procedure

Compressor Replacement

Step-by-step instructions for replacing a compressor, including isolation and wiring.