Ingersoll-Rand Precedent D/WHC074H User Manual

September 2022
RT-SVX23R-EN
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.
Packaged Rooftop Air Conditioners
Precedent™ — Heat Pump
3 to 10 Tons — 60 Hz
Installation, Operation, and Maintenance
Model Numbers:
WSC036H-WSC060H
Model Numbers:
WSC092H, WSC102H, WSC120H
Model Numbers:
W/DHC036H-W/DHC120H

Ingersoll-Rand Precedent D/WHC074H Specifications

General

Brand	Ingersoll-Rand
Model	Precedent D/WHC074H
Category	Heat Pump
Language	English

Summary

Introduction and Safety Precautions

Warnings, Cautions, and Notices

Defines advisory types: Warning, Caution, and Notice for hazard communication.

Personal Protective Equipment (PPE) Required!

Details mandatory PPE for technicians to prevent injury from hazards.

Pre-Installation Safety Measures

Fiberglass Wool!

Warns about hazards of fiberglass wool exposure and mandatory PPE.

Installation Guidelines

Foundation

Risk of Roof Collapsing!

Warns of the danger of roof collapse due to improper structural support.

Pre-Start Checks

Voltage Imbalance

Explains voltage imbalance requirements and calculation for three-phase motors.

Electrical Phasing (Three Phase Motors)

Unit Start-Up and Operation

ReliaTel™™ Controls

Heating Operation

Sequence of Operation - Heat Pumps

Compressor Start-Up

Maintenance and Troubleshooting

Hazardous Service Procedures!

Outlines essential safety precautions before performing any maintenance tasks.

System Status Checkout Procedure

Resetting Cooling and Heating Lockouts