Table of Contents
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INSTALLATION
MANUAL
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . 5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . 65
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . 66
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . 73
See following pages 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 damage
may result if installation procedure is not handled properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
SINGLE PACKAGE AIR CONDITIONERS AND
SINGLE PACKAGE GAS/ELECTRIC UNITS
DL/DU -06, -07, -08, -10 and -12
6-1/2 TO 12-1/2 TON
(9.0 TO 11.5 EER)
Tested in accordance with:
167791-BIM-B-0606
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Table of Contents
Troubleshooting
Related Manuals for York DL-12
Summarization of Contents
Installation Procedures
Installation Safety Information
Safety precautions for unit installation.
Preceding Installation Steps
Steps to take before physically installing the unit.
Power and Control Wiring
Power Wiring Detail
Specifics on power wiring connections and sizing.
Options and Accessories
Electric Heat Options
Details on available electric heat options and their installation.
Motorized Outdoor Damper Option
Information on the motorized outdoor damper option.
Economizer Options
Description of the two available economizer options.
Power Exhaust Options
Details on factory and field installed power exhaust options.
Economizer and Power Exhaust Adjustments
Minimum Position Adjustment
How to adjust the minimum damper position for economizers.
Enthalpy Set Point Adjustment
Setting the enthalpy set point for economizer operation.
Power Exhaust Damper Set Point
Adjusting the power exhaust damper set point.
Unit Phasing and Blower Rotation
Blower Rotation Check
How to check and correct blower rotation direction.
Belt Tension Adjustment
Procedure for properly adjusting blower belt tension.
Air Balance Procedures
Checking Air Quantity (Method One)
Method to measure airflow using indoor coil pressure drop.
Checking Air Quantity (Method Two)
Method to measure airflow using supply and return duct pressure.
Unit Operation Overview
Sequence of Operations Overview
General overview of how the unit responds to thermostat calls.
Cooling Sequence of Operation
Detailed sequences for continuous and intermittent blower operation.
Economizer with Single Enthalpy Sensor
Operation sequence when using a single enthalpy sensor.
Cooling Operation Errors
High-Pressure Limit Switch
How the high-pressure limit switch affects compressor operation.
Low-Pressure Limit Switch
How the low-pressure limit switch affects compressor operation.
Freezestat Operation
How the freezestat affects compressor operation.
Low Ambient Cooling Mode
Operation of the unit in low ambient cooling conditions.
Cooling Safety Controls
Limit Switch (LS)
Operation of the electric heat limit switch.
Auxiliary Limit Switch (ALS)
Function of the auxiliary limit switch in gas heat.
Electric Heat Operation Errors
Temperature Limit
How the temperature limit affects electric heat operation.
Gas Heating Sequence of Operations
First Stage of Heating
Sequence for the first stage of gas heating.
Second Stage of Heating
Sequence for the second stage of gas heating.
Retry Operation
Procedure for retry operations after flame loss.
Gas Heating Operation Errors
Lock-out
Conditions leading to a one-hour lockout.
Temperature Limit
How the temperature limit affects gas heat operation.
Flame Sense
Operation of the flame sensing system.
Gas Valve Monitoring
UCB and ICB monitoring of the gas valve.
Gas Heat Safety Controls
Limit Switch (LS)
Operation of the gas heat limit switch.
Start-Up (Cooling)
Pre-Start Check List
Checks to perform before starting the cooling system.
Operating Instructions
Steps for operating the unit in cooling mode.
Post Start Check List
Checks to perform after starting the cooling system.
Start-Up (Gas Heat)
Pre-Start Check List
Checks to perform before starting the gas heat system.
Operating Instructions
Steps for operating the unit in gas heat mode.
Post Start Check List
Checks to perform after starting the gas heat system.
Troubleshooting Overview
DL/DU Flash Codes
Explanation of the unit control board flash codes for error identification.
Cooling Troubleshooting Guide
Blower Motor Not Energizing (Cooling)
Troubleshooting steps when the supply air blower motor doesn't start.
Compressor #1 Not Operating (Cooling) - Initial Checks
Troubleshooting steps when compressor #1 fails to start.
Gas Heat Troubleshooting Guide
Blower Motor Not Energizing (Gas Heat)
Troubleshooting when the blower motor doesn't start during heating.
Draft Motor Not Starting (Gas Heat)
Steps to take when the draft motor doesn't start during heating.
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