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-08
Summarization of Contents
General Safety and Inspection
General Unit Overview
Overview of the DL/DU unit series and their intended use.
Safety Considerations for Installation
Crucial safety guidelines and warnings for installation and maintenance.
Inspection Procedure Upon Receipt
Procedure for inspecting the unit upon receipt to identify transit damage.
Reference and Approvals
Additional Reference Materials
List of additional technical documents and resources available.
Installation Approvals and Certifications
Details on CSA design certifications and installation approvals.
Installation Guidelines
Installation Safety Information
Essential safety precautions to be followed before and during installation.
Preceding Installation Steps
Steps to take before commencing the main installation process.
Wiring Procedures
Thermostat Wiring
Recommendations for thermostat location and wiring procedures.
Power and Control Wiring
Requirements for field wiring, grounding, and disconnects per electrical codes.
Optional Heating and Gas Piping
Optional Electric Heat
Information on optional factory-installed electric heating systems.
Gas Piping Guidelines
Guidelines for proper sizing and installation of gas piping.
Optional Gas Heat System
Description of optional gas-fired heating systems.
LP Gas Units and Options/Accessories
LP Gas Units, Tanks, and Piping
Considerations for LP gas units, tanks, and piping installations.
Available Options and Accessories
Overview of available factory-installed options and accessories.
Economizer and Power Exhaust Set Points
Damper Position Adjustments
Procedure for adjusting damper positions for economizer and power exhaust.
Indoor Air Quality (AQ) Sensor
Explanation of the Indoor Air Quality sensor input and its function.
Motor and Belt Adjustments
Phasing and Blower Rotation
Guidance on checking and correcting compressor and blower rotation phasing.
Belt Tension Adjustment
Instructions for adjusting and checking belt tension for proper operation.
Air Balance and Quantity Checking
Air Balance Procedures
Procedure for balancing air distribution in supply and return duct systems.
Checking Air Quantity
Methods for measuring and verifying the unit's airflow (CFM).
Operation Modes and Sequences
Sequence of Operations Overview
General explanation of how the thermostat controls unit components.
Cooling Sequence Modes
Details cooling operation, including blower modes and economizer.
No Outdoor Air Options Sequence
Cooling sequence for units without economizer or outdoor air intake.
Economizer and Damper Modes
Describes economizer operation with single/dual enthalpy and motorized dampers.
Cooling Operation Errors and Safety Controls
Compressor Limit Switches
Diagnosing and resolving high-pressure, low-pressure, and freezestat trips.
Low Ambient Cooling Operation
Operation and considerations for cooling in low ambient temperatures.
Cooling Safety Controls Overview
Overview of safety controls monitored by the unit control board.
Electric Heat Operation Errors
Temperature Limit and Limit Switch
UCB response to high temperature limit and limit switch operation.
Gas Heating Sequence of Operations
Ignition Control Board Operations
Operation of the ignition control board during heating sequences.
Heating Stages and Retry Procedure
Sequence for first/second stage heating and retry operations.
Gas Heating Operation Errors
Recycle, Lock-Out, and Flame Sense
Error handling for recycle, lock-out, and flame detection failures.
Gas Valve and Safety Controls
Gas valve monitoring and safety controls in gas heating.
Start-Up Procedures
Cooling Start-Up Checks
Pre-start and post-start checklists for cooling operation.
Gas Heat Start-Up Checks
Pre-start and post-start checklists for gas heating operation.
Shut Down and Gas Pressure Adjustment
Unit Shut Down Procedure
Procedure for safely shutting down the unit.
Manifold Gas Pressure Adjustment
Procedure for adjusting manifold gas pressure for heating.
Checking Gas Input
Natural Gas Input Verification
Steps for checking gas input for natural gas operation.
Superheat Charging Data
DL-06 & DL-07 Standard Efficiency
Superheat charging data for DL-06 and DL-07 standard units.
Superheat Charging Data
DL-12 Standard Efficiency
Superheat charging data for DL-12 standard units.
DU-06 High Efficiency
Superheat charging data for DU-06 high efficiency units.
Superheat Charging Data
DU-07, DU-08, DU-12 High Efficiency
Superheat charging data for DU-07, DU-08, DU-12 high efficiency units.
Troubleshooting Overview
DL/DU Flash Codes Explanation
Explanation of flash codes used by the Unit Control Board (UCB) for diagnostics.
Cooling Troubleshooting Guide
Blower or Compressor #1 Issues
Troubleshooting steps for blower or compressor #1 faults.
Cooling Troubleshooting Guide
Compressor #2 or Alarms/ASCD Issues
Troubleshooting steps for compressor #2 or alarm/ASCD faults.
Cooling Troubleshooting Guide
Economizer/Programming Issues
Troubleshooting steps for economizer wiring or programming issues.
Gas Heat Troubleshooting Guide
Blower or Draft Motor Issues
Troubleshooting steps for blower or draft motor faults.
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