Trane Precedent DSJ150A 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.
April 2023
PKGP-SVX010B-EN
Installation, Operation, and Maintenance
Packaged Rooftop Air
Conditioners
Precedent™ Heat Pump
Standard Efficiency
12.5 to 25 Tons — 60 Hz
Model Numbers: WSJ150A - WSJ300A, DSJ150A - DSJ300A

Trane Precedent DSJ150A Specifications

General

Model Number	DSJ150A
Category	Air Conditioner
Series	Precedent
Cooling Capacity	150, 000 BTU/h
Refrigerant	R-410A
Phase	3
Length	51 inches

Summary

Introduction and Safety

General Safety Guidelines

EHS policies, general hazards, explosion/fire risks, and water damage.

Field Wiring and Grounding Requirements

Personal Protective Equipment (PPE)

General Information (Continued)

Smoke Detector and Phase Monitor

Optional smoke detector and phase monitor functions.

Safety and Monitoring Controls

Clogged filter, overflow switch, compressor disable, and low pressure controls.

Pre-Installation Safety

Fiberglass Wool Handling

Safety precautions, PPE, and first aid for fiberglass wool.

Hazardous Voltage Precautions

Warning about disconnecting power before servicing to avoid shock.

Dimensional Data

Figure 7. 12.5 to 25 tons standard efficiency - unit clearance and roof opening

Diagram illustrating unit clearance and roof opening requirements.

Clearances

Minimum operating and service clearances for unit installation.

Figure 11. Typical installation clearances for single and multiple unit applications

Diagrams showing typical installation clearances for units.

Weights

Model and Option Weights

Tables for unit weights, corner weights, and accessory weights.

Weights

Lifting and Rigging Safety

Warnings and guidance for safely lifting and rigging the unit.

Installation

Safety Precautions

Warnings for heavy objects, roof damage, roof collapse, and ductwork.

Installation (Continued)

Combustible Materials and Roof Curb

Maintain clearance from combustibles and install roof curbs.

Rigging and Lifting Procedures

Safe procedures and warnings for rigging and lifting the unit.

Field Installed Power Wiring and Grounding

Requirements for field-installed power wiring and main unit grounding.

Installation (Continued)

General Unit Requirements and Diagrams

Checklist for installation and diagrams for fork pockets.

Electrical Power and Wiring Requirements

Main power, electric heat, low voltage wiring, and grounding requirements.

Requirements of Gas Heat

Wiring Procedures and Guidelines

Controls using DC Analog Input/Outputs (Standard Low Voltage Multi conductor Wire)

Economizer and Vent Hood Installation

Temperature Limit Switch (TCO1) Usage

Through-the-Base Gas Installation

Condensate Drain Configuration

Natural gas pipe mains and branches

Air-Fi® Wireless Communication Interface

Space Temperature Averaging

Pre-Start Procedures

Electrical Safety Warnings

Hazards related to capacitors, rotating components, and voltage imbalance.

Voltage Imbalance and Phasing

Pre-Start Procedures (Continued)

Electrical Safety and Component Warnings

Hazards related to capacitors, live components, and crankcase heaters.

Unit Start-Up

Ignition Module and Smoke Detector

Unit Start-Up (Continued)

Compressor and Heating System Startup

Procedures for compressor startup, hot gas reheat, and gas heat units.

Final System Setup and Checks

Maintenance Procedures

General Service and Monthly Tasks

Safety precautions and monthly maintenance checks.

Filter and Smoke Detector Maintenance

Maintenance Procedures (Continued)

Condensate Switch and Cooling Season Tasks

Coil Cleaning and Chemical Safety

Procedures for cleaning coils and handling hazardous chemicals.

Maintenance Procedures (Continued)

Reheat Oil Management and Compressor Safety

Managing reheat oil and compressor safety warnings.

Troubleshooting

Wiring Diagrams

Table 15. Wiring diagrams

List of wiring diagrams with drawing numbers and descriptions.

Wiring Diagrams (Continued)

Table 15. Wiring diagrams (continued)

Continuation of the list of wiring diagrams.

Piping Diagrams

Figure 34. Piping diagram - cooling mode, 12.5 to 15 tons standard efficiency (W/DSJ150-180)

Piping Diagrams (Continued)

Figure 35. Piping diagram - cooling mode, 20 to 25 tons standard efficiency (W/DSJ240-300)

Figure 36. Piping diagram - heating mode, 12.5 to 15 tons standard efficiency (W/DSJ150-180)

Figure 37. Piping diagram – heating mode, 20 to 25 tons standard efficiency (W/DSJ240-300)

Figure 38. Piping diagram - cooling with HGRH mode, 12.5 to 15 tons standard efficiency (W/DSJ150-180)

Figure 39. Piping diagram – cooling with HGRH mode, 20 to 25 tons standard efficiency (W/DSJ240-300)

Gas Heat Operation and Maintenance

Safety Hazards!

Safety warnings for gas heat units, including explosion and fire risks.

Gas Heat Operation and Maintenance (Continued)

Air Filters

Electrical and Burner Safety Warnings

Hazards related to capacitors, manual burner lighting, and explosion/fire risks.

Heating System

Heating System Shutdown Procedure

Heating System Start-Up

Gas Heat Operation and Maintenance (Continued)

Freeze Prevention and Gas Shutoff

Heating System Maintenance and Safety

Procedures for heating system maintenance and capacitor safety.

Limited Warranty

Electric Air Conditioner

Warranty details for WSJ/DSJ Precedent Models.