York 20 Series User Manual

INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
SERIES 20
GAS/ELECTRIC SINGLE PACKAGE
AIR CONDITIONERS
MODELS: J15, 18, 20 & 25 DJ
349215-JIM-B-1008
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . .6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .53
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .53
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .56
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions
are given
to prevent equipment damage. Warnings
are given to
alert installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.

York 20 Series Specifications

General

Series	20 Series
Refrigerant Type	R-410A
Phase	1
Product Type	Air Conditioner
Operating Voltage	208-230V
Sound Level (Outdoor)	As low as 72 dB
Weight (Outdoor Unit)	Approx. 220 lbs

Summary

Installation Guidelines

Installation Safety Information

Instructions and precautions for safe unit installation, ensuring instructions are available to the consumer.

Limitations

Location

Rigging and Handling

Clearances

Ductwork

Electrical, Gas, and Control Systems

Power and Control Wiring

Field wiring must conform to electrical codes; ensure proper grounding and voltage tolerances.

Optional Electric Heat

Optional Gas Heat

Gas Piping

Gas Connection

Recommendations for gas supply line routing, drip legs, unions, and leak testing.

Control System, Protection, and Start-Up

High-Pressure Limit Switch

UCB de-energizes compressor, initiates ASCD, and stops condenser fans if switch opens.

Low-Pressure Limit Switch

Monitors low-pressure switch to de-energize compressor if it fails to close or opens.

Freestat

UCB de-energizes compressor and stops condenser fans if the freestat opens.

Compressor Protection

UCB features minimize compressor wear, including anti-short cycle delay and minimum run time.

Electric Heating Sequence of Operations

Describes operation of electric heat section, including single and two-stage heating.

Gas Heating Sequence of Operations

Start-Up (Cooling)

Pre-start checklist, operating instructions, post-start checks, and shutdown procedures for cooling.

Start-Up (Gas Heat)

Pre-start checklist, operating instructions, and post-start checks for gas heat start-up.

Burner Adjustment and Troubleshooting

Manifold Gas Pressure Adjustment

Pilot Checkout

Troubleshooting

Guides for diagnosing and resolving cooling and gas heat system issues.

Cooling Troubleshooting Guide

Step-by-step troubleshooting for cooling system components and operations.

Gas Heat Troubleshooting Guide

Troubleshooting steps for gas heat issues, including blower and draft motor problems.