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Trane YSC072H User Manual

Trane YSC072H
84 pages
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Packaged Rooftop Air Conditioners
Precedent™ — Gas/Electric
3 to 10 Tons — 60 Hz
Installation, Operation, and Maintenance
January 2021
RT-SVX21AC-EN
Model Numbers:
YSC036G - YSC060G YHC072F - YHC102F
Model Numbers:
YSC072H - YSC120H YHC120F
Model Numbers:
YHC036E - YHC072E YHC037E - YHC067E
Model Numbers:
YHC048F - YHC060F
SAFETY WARNING
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.

Table of Contents

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Trane YSC072H Specifications

General IconGeneral
ModelYSC072H
Refrigerant TypeR-410A
Compressor TypeScroll
Voltage208/230V
Phase3
HSPFNot Applicable

Summary

Introduction and Safety Information

Warnings, Cautions, and Notices

Defines advisory types: WARNING, CAUTION, and NOTICE for hazard communication.

Essential Safety Warnings

Covers critical safety warnings for field wiring, PPE, and EHS policies.

Model Number Descriptions (3-10 Tons)

Model Number Descriptions (3-5 Tons, 17 Plus)

Key Model Number Digits Explained

Details on interpreting digits for Unit Type, Efficiency, Airflow, Controls, and Heating.

General Unit Information (Cont.)

Compressor Controls and Protection

Explains Low Pressure Control, High Pressure Control, and Compressor Disable functions.

Pre-Installation Safety and Precautions

Fiberglass Wool Handling and Safety

Details PPE, first aid, and precautionary measures for fiberglass exposure.

Dimensions and Weights (Cont.)

Lifting and Handling Safety

Addresses hazards of heavy objects and improper lifting techniques.

Installation Procedures

Installation Procedures (Cont.)

Combustible Material Clearances

Safety guidelines for maintaining clearances from heat sources.

Unit Lifting and Fork Pocket Usage

Specific instructions for lifting the unit using fork pockets.

Horizontal Discharge Conversion (3-5 Ton Units)

Steps for converting airflow direction from downflow to horizontal.

Rigging and Lifting Heavy Objects

Safety procedures and considerations for rigging and lifting the unit.

Horizontal Discharge Conversion (6-10 Ton Units)

Steps for converting airflow direction for larger capacity units.

Electrical Power and Gas Installation

Main Electrical Power Requirements

Covers electrical wiring, grounding, capacitor safety, and conductor types.

Through-the-Base Gas Installation

Details on connecting the gas supply line through the unit base.

Gas Heat Requirements and Options

Requirements for Gas Heat

Covers gas train pressure, piping requirements, and leak checking.

Condensate and Filter Management

Field Wiring and Power Connection

Field Installed Power Wiring Safety and Requirements

Covers wiring safety, grounding, and conductor types for field wiring.

Control Wiring and Power Requirements

Field-Installed Control Wiring Safety

Covers control wiring safety, grounding, and conductor guidelines.

Control Wiring Specifications

Advanced Control Features

Pre-Start Checks and Setup

Voltage Imbalance and Electrical Phasing

Critical checks for three-phase power quality and motor phasing.

Pre-Start Checks and Setup (Cont.)

Test Modes and Procedures

Service Test Guide for Component Operation

Details different test modes, their sequences, and resistance values.

Electromechanical Controls Test Procedures

Outlines tests for fan, economizer, and cooling functions.

Unit Start-Up and Sequence of Operation

ReliaTel™™ Control Cooling Modes

Details cooling operation without economizer and three-stage cooling.

Sequence of Operation (Cont.)

ReliaTel™ Control Cooling with Economizer

Explains how the economizer is utilized for cooling and temperature control.

Verifying Proper Air Flow

Procedures for checking and adjusting supply and return air flow.

Compressor Start-Up Procedures

Steps for starting compressors and checking rotation and pressures.

Electromechanical Control Cooling without Economizer

Details cooling operation for electromechanical systems without an economizer.

Economizer Start-Up Procedure

Steps for setting up the economizer, including minimum position settings.

Maintenance Procedures

Safety Precautions for Maintenance

General safety warnings for performing maintenance tasks.

Coil Cleaning Procedures

Microchannel and RTPF Coil Cleaning

Detailed cleaning methods for microchannel and RTPF coils with safety warnings.

Troubleshooting Guide

ReliaTel™™ Control System Diagnostics

Checking RTRM status, LED indicators, and system failures.

Troubleshooting Guide (Cont.)

Resetting Cooling and Ignition Lockouts

Procedures for resetting cooling failures and ignition lockouts via space or unit.

Economizer Control (ECA) Test Procedures

Limited Warranty Information

Combination Gas Electric Air Conditioner Warranty

Details warranty coverage for parts, compressors, and heat exchangers.

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