York DHUC 036 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)

York DHUC 036 Specifications

General

Brand	York
Model	DHUC 036
Category	Air Conditioner
Language	English

Summary

GENERAL INFORMATION AND SAFETY

FOR YOUR SAFETY

Essential safety precautions and emergency procedures for gas and electrical appliances.

PRODUCT INSPECTION AND REFERENCE

Procedures for unit inspection and list of related documentation.

APPROVALS AND CERTIFICATIONS

Details of design certifications and listings by regulatory bodies.

INSTALLATION GUIDE

LIMITATIONS AND CODES

Specifies codes, standards, and limitations for unit installation.

LOCATION AND HANDLING

Guidelines for selecting location and safe unit rigging and handling.

CLEARANCES AND DUCTWORK

Specifies clearances and guidance for connecting ductwork.

INSTALLATION DETAILS

FILTERS AND DRAINAGE

Procedures for filter installation and condensate drain connection.

WIRING AND BLOWER SPEED

Instructions for power/control wiring and blower speed selection.

GAS PIPING AND COMBUSTION

Guidelines for gas piping, LP conversion, and combustion discharge.

UNIT SPECIFICATIONS AND HOODS

VENT AND COMBUSTION AIR HOODS

Installation of vent and combustion air hoods for proper exhaust.

PHYSICAL DATA AND WEIGHTS

Unit dimensions, weights, and performance data for installation planning.

OPERATING PROCEDURES

COOLING SYSTEM OPERATION

Sequence of operation for the cooling system and safety controls.

HEATING SEQUENCE OF OPERATION

Sequence of operation for the heating system and safety controls.

START-UP AND ADJUSTMENTS

OPERATING INSTRUCTIONS

Steps for turning the unit on and setting controls.

POST-START CHECK LIST (GAS)

Checks to perform after the heating section is operating.

GAS PRESSURE ADJUSTMENT

Procedure for adjusting the manifold gas pressure for proper operation.

BURNER AND BLOWER ADJUSTMENTS

PILOT CHECKOUT AND FLAME ADJUSTMENT

Procedures for checking and adjusting the pilot flame.

BURNER AIR SHUTTER ADJUSTMENT

Adjusting burner shutters for optimal flame appearance.

BLOWER SPEED AND BELT ADJUSTMENT

Adjusting supply air blower speed and belt tension.

PERFORMANCE CHECKS AND APPROVAL

SUPPLY AIR CFM MEASUREMENT

Method for measuring supply air CFM using pressure drop.

GAS INPUT CHECKING

Procedure for verifying natural gas input rate.

OWNER'S APPROVAL

Securing owner approval and providing operational guidance.

NORMAL MAINTENANCE

FILTER REPLACEMENT

Instructions for inspecting and replacing unit filters.

MOTOR AND COIL CARE

Maintenance for fan motors and cleaning the outdoor coil.

BURNER AND COMBUSTION SYSTEM

Periodic checks and cleaning for burners and flue passages.

TROUBLESHOOTING GUIDE

BLOWER AND DRAFT MOTOR ISSUES

Troubleshooting common problems with blowers and draft motors.

IGNITION AND BURNER PROBLEMS

Diagnosing and resolving issues with pilot ignition and main burners.