Trane Precedent YZC090F - User Manual

Packaged Rooftop Air Conditioners
Precedent™ with eFlex™
Technology, Gas/Electric
3 to 10 Tons - 60 Hz
Installation, Operation, and Maintenance
January 2021
RT-SVX46G-EN
Model Numbers:
YZC036E YZC072F
Model Numbers:
YZC048F YZC090F
Model Numbers:
YZC060E YZC102F
Model Numbers:
YZC120F
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.

Trane Precedent YZC090F Specifications

General

Model Number	YZC090F
Category	Air Conditioner
Cooling Capacity	90, 000 BTU/h
Energy Efficiency Ratio (EER)	11.2
Refrigerant Type	R-410A
Compressor Type	Scroll
Phase	3
Voltage	208-230V

Summary

Introduction

Personal Protective Equipment (PPE) Required!

Details essential PPE for technicians to prevent injury from electrical, mechanical, and chemical hazards.

Follow EHS Policies!

Mandates adherence to company Environmental, Health, and Safety policies and local regulations.

General Information

Compressor;Inverter Protection

Explains how the ReliaTel™ system monitors inverter drive errors and manages compressor restarts.

Pre-Installation

Fiberglass Wool!

Warns about hazards of fiberglass exposure and mandates proper PPE including respirators and protective clothing.

Installation

Risk of Roof Collapsing!

Warns about the danger of roof collapse due to inadequate structural support for rooftop units.

Improper Unit Lift!

Warns about the severe risks associated with improper lifting techniques, potentially causing injury or damage.

Main Electrical Power Requirements

Covers essential electrical connection requirements, including safety warnings and proper wiring practices.

Proper Field Wiring and Grounding Required!

Stresses the critical importance of qualified personnel and adherence to codes for safe field wiring and grounding.

Field Installed Power Wiring

Provides guidelines for sizing and installing unit supply power wiring, ensuring compatibility with nameplate ratings.

Pre-Start

Voltage Imbalance

Explains the critical requirement for balanced three-phase power and how to measure and calculate imbalance.

Electrical Phasing (Three Phase Motors)

Guides on verifying and correcting electrical phasing for proper motor rotation before unit startup.

Compressor Crankcase Heaters

Details the function of crankcase heaters in maintaining oil temperature and preventing damage during starts.

Troubleshooting

ReliaTel Control

Explains how to check unit diagnostics and system status information stored in the RTRM.

System Status Checkout Procedure

Details methods for checking system status, including LED indicators and voltage readings at specific terminals.

Resetting Cooling and Ignition Lockouts

Provides procedures for resetting cooling failures and ignition lockouts from the space or at the unit.

Unit Economizer Control (ECA) Troubleshooting

Guides on troubleshooting the Economizer Actuator (ECA) using LED indicators and error codes.