York DBUC 072 - User Manual

GENERAL
Model DUC units are single package air conditioners with gas
heat designed for outdoor installation on a rooftop or a slab.
The units are completely assembled on rigid, permanently
attached base rails. All piping, refrigerant charge, and electrical
wiring is factory-installed and tested. The units require only electric
power, gas piping and duct connections at the point of installation.
The gas-fired heaters have aluminized steel tubular heat
exchangers and spark ignition with intermittent pilot.
This appliance is not to be used for temporary heating of
buildings or structures under construction.
INSPECTION
As soon as a unit is received, it should be inspected for possible
damage during transit. If damage is evident, the extent of the
damage should be noted on the carrier’s freight bill. A separate
request for inspection by the carrier’s agent should be made in
writing.
REFERENCE
Additional information on the design, installation, operation and
service of this equipment is available in the following reference forms:
•
530.18-N1.2V -Economizer Accessory
•
530.18-N1.13V -Man. Outdoor Air Damper Accy 0-35%
•
530.18-N1.14V -Man. Outdoor Air Damper Accy 0-100%
•
530.18-N1.12V -Motorized Outdoor Air Damper Accy.y
•
530.18-N1.8V -Coil Guard
•
530.18-N2.11V -Low NOx Accessory
•
530.18-N8.2V -High Altitude Accy. (Natural Gas)
•
530.18-N8.3V -High Altitude Accy. (Propane)
•
530.18-N8.4V -Gas Piping Accessory
•
530.18-N8.12V -Propane Conversion Accessor
•
690.15-N25V -Low Ambient Accessory
Renewal Parts:
•
Refer to Parts Manual for complete listing of replacement
parts on this equipment.
All forms referenced in this instruction may be ordered from:
Publications Distribution Center
Unitary Products Group
P.O. Box 1592, York, PA 17405
APPROVALS
Design certified by CGA and UL listed as follows:
1. For use as a forced air furnace with cooling unit.
2. For outdoor installation only.
3. For installation directly on combustible flooring or, in the U.S.A.,
on wood flooring or Class A, B, or C roof covering material.
4. For use with natural gas and/or propane (LP) gas.
Not suitable for use with conventional venting systems.
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
THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE WITH THE ENCLOSED INSTALLATION INSTRUCTIONS
AND ANY APPLICABLE LOCAL, STATE, AND NATIONAL CODES INCLUDING, BUT NOT LIMITED TO, BUILDING, ELECTRI-
CAL, AND MECHANICAL CODES
WARNING
INCORRECT INSTALLATION MAY CREATE A CONDITION WHERE THE OPERATION OF THE PRODUCT COULD CAUSE
PERSONAL INJURY, PROPERTY DAMAGE AND/OR DEATH.
WARNING
DE-ENERGIZE THE ELECTRICAL POWER AND TURN OFF THE GAS SUPPLY TO THE UNIT BEFORE ATTEMPTING TO
INSPECT, REPAIR OR PERFORM MAINTENANCE TO THE UNIT.
CAUTION
SCROLL COMPRESSORS
OPERATE IN ONLY ONE
DIRECTION.
If the compressor is
experiencing:
- low amperage draw
- similar discharge and
suction pressure
- increased noise level
It is operating in reverse.
Switch two line voltage
connections to correct.
FOR YOUR SAFETY
Do not store or use gasoline or
other flammable vapors or liquids
in the vicinity of this or any other
appliance
.
If you smell gas:
1. Open windows
2. Don’t touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
035-14839
MODELS DHUC 036, 048 & 060 (10 SEER)
MODEL DBUC 072 (9 EER)
(STYLE A & Belt-Drive Option)
INSTALLATION
INSTRUCTION
GAS / ELECTRIC
SINGLE PACKAGE AIR CONDITIONERS
Supersedes: 530.18-N8W (295)
530.18-N8W (1096)

Summary

SAFETY AND GENERAL INFORMATION

GENERAL FUEL SAFETY

Safety advice for handling fuels and responding to gas leaks.

INSTALLATION COMPLIANCE AND HAZARDS

Warnings on strict compliance and risks of incorrect installation.

ELECTRICAL SAFETY PRECAUTIONS

Warning to de-energize power before performing maintenance.

INSTALLATION PROCEDURES

LIMITATIONS AND CODES

National and local safety codes and utility requirements for installation.

SITE LOCATION GUIDELINES

CLEARANCE REQUIREMENTS

Required clearances for proper operation, servicing, and installation.

POWER AND CONTROL WIRING

Field wiring standards, grounding, and connector requirements.

GAS PIPING REQUIREMENTS

Guidance on proper gas piping sizing, materials, and installation.

GAS CONNECTION DETAILS

Procedures for routing gas supply lines and making connections.

VENT AND COMBUSTION AIR HOODS

TROUBLESHOOTING

TROUBLESHOOTING OVERVIEW

General advice and safety warnings for troubleshooting procedures.

BLOWER MOTOR PROBLEMS

Diagnosing and resolving issues with the supply air blower motor.

DRAFT MOTOR ISSUES

Troubleshooting problems related to the draft motor.

FURNACE IGNITION FAILURES

Identifying causes for failure of the furnace to ignite.

PILOT IGNITION PROBLEMS

Troubleshooting issues with pilot burner ignition.

MAIN BURNER IGNITION ISSUES

Diagnosing problems with main burner ignition after pilot lights.

FLAME CHARACTERISTIC PROBLEMS

York DBUC 072 Specifications

General

Brand	York
Model	DBUC 072
Category	Air Conditioner
Language	English