Ingersoll-Rand YHC120F - User Manual

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™ — Gas/Electric
3 to 10 Tons — 60 Hz
Installation, Operation,
and Maintenance
Model Numbers
YSC036G - YSC060G YHC072F - YHC102F
YSC072H - YSC120H YHC120F
YHC036E - YHC072E YHC037E - YHC067E
YHC048F - YHC060F
RT-SVX21Y-EN
November 2018

Summary

Introduction

Warnings, Cautions, and Notices

Safety advisories and definitions of advisories.

Model Number Descriptions - 3 to 10 Tons (T;Y)

Model Number Descriptions - 3 to 5 Tons (T;Y - 17 Plus)

Digit 1 - Unit Type

Defines codes for unit type (DX Cooling, Gas/Electric).

Digit 2 - Efficiency

Defines codes for efficiency (Standard, High).

General Information

System Input Devices and Functions

Describes functions of various input devices for RTRM.

Low Pressure Control

High Pressure Control

Pre-Installation

Fiberglass Wool Safety

Warning and precautions for handling fiberglass wool insulation.

Dimensions and Weights

Unit Clearances

Dimensions and Weights

Heavy Objects!

Safety warning regarding lifting heavy objects.

Installation

Foundation

Guidelines for preparing foundations for unit installation.

Rigging

Instructions and warnings for safely rigging the unit.

Main Electrical Power Requirements

Details on power supply wiring and grounding.

Field Installed Power Wiring

Guidelines for sizing and installing supply power wiring.

Main Unit Power

Requirements for field wiring and grounding.

Installation

Standard Wiring

Field-Installed Control Wiring

Pre-Start

Voltage Imbalance

Explains effects of voltage imbalance and calculation method.

Test Modes

Describes three methods for cycling unit components.

Electromechanical Controls Test Procedure

Details on testing electromechanical controls.

Electrical Phasing (Three Phase Motors)

How to determine and correct electrical phasing.

Pre-Start

Unit Start-Up

Sequence of Operation

Describes unit operation modes and control options.

ReliaTel Controls

ReliaTel Control Cooling without an Economizer

Sequence of Operation

Economizer Set-Up

Verifying Proper Air Flow

Electromechanical Control Heating Operation (for Gas Units)

Economizer Start-Up

ReliaTel Control Heating Operation (for Gas Units)

Supply Air Temperature Control - Occupied Cooling and Heating

Sequence of Operation

Compressor Start-Up

Procedures for starting compressors and checking operation.

Final System Setup

Final checks before leaving the unit.

Maintenance

Fan Belt Adjustment - Belt Drive Units

Coil Cleaning

Microchannel (MCHE) Coils

Troubleshooting

ReliaTel Control

Unit diagnostics and system status information.

Zone Temperature Sensor (ZTS) Tests

Procedures for testing ZTS components and sensors.

Unit Economizer Control (ECA) Troubleshooting

Diagnosing issues with the economizer actuator.

Unit Economizer Control (ECA) Test Procedures

Diagnostic tests for the economizer actuator.

System Status Checkout Procedure

Methods for checking system status via LEDs.

Troubleshooting

Electromechanical Control

Ingersoll-Rand YHC120F Specifications