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INSPECTION
1. Check for damage after the unit is unloaded. Report promptly, to
the carrier, any damage found to the unit. Do not drop the unit.
IMPORTANT: The use of “spreader bars” is required when
hoisting the unit (to prevent damage to sides and top).
2. Check the unit’s nameplate to determine if the unit is correct for
the intended application. The power supply must be adequate for
both the unit and all accessories.
3. Check to be sure the refrigerant charge has been retained during
shipment. Access to 1/4" flare pressure taps may be gained by
removing the furnace compartment access panel.
GENERAL INFORMATION
IMPORTANT: Read this entire manual before beginning
installation procedures.
▲
WARNING:
BODILY INJURY CAN RESULT FROM
HIGH VOLTAGE ELECTRICAL COMPONENTS, FAST MOVING FANS,
AND COMBUSTIBLE GAS. FOR PROTECTION FROM THESE
INHERENT HAZARDS DURING INSTALLATION AND SERVICING,
THE ELECTRICAL SUPPLY MUST BE DISCONNECTED AND THE
MAIN GAS VALVE MUST BE TURNED OFF. IF OPERATING CHECKS
MUST BE PERFORMED WITH THE UNIT OPERATING, IT IS THE
TECHNICIANS RESPONSIBILTY TO RECOGNIZE THESE HAZARDS
AND PROCEED SAFELY.
IMPORTANT: DO NOT CONNECT GAS PIPING TO THE UNIT
UNTIL A LINE PRESSURE TEST HAS BEEN COMPLETED.
DAMAGE TO THE GAS VALVE MAY RESULT IN AN UNSAFE
CONDITION. THIS UNIT SHOULD NEVER BE EXPOSED TO
GAS LINE PRESSURE IN EXCESS OF 14 INCHES WATER
COLUMN. (1/2 PSIG)
IMPORTANT: RECONNECT ALL GROUNDING DEVICES.
ALL PARTS OF THIS PRODUCT CAPABLE OF CONDUCTING
ELECTRICAL CURRENT ARE GROUNDED. IF GROUNDING
WIRES, SCREWS, STRAPS, CLIPS NUTS OR WASHERS
USED TO COMPLETE A PATH TO GROUND ARE REMOVED
FOR SERVICE, THEY MUST BE RETURNED TO THEIR ORIGI-
NAL POSITION AND PROPERLY FASTENED.
IMPORTANT: ALL POWER LEGS MAY NOT BE BROKEN BY
CONTACTORS. SEE WIRING DIAGRAM ON UNIT CONTROL
BOX COVER.
THIS UNIT, AS SHIPPED FROM THE FACTORY, IS DE-
SIGNED FOR NATURAL GAS ONLY.
BEFORE STARTING THE COMPRESSOR, THE CRANKCASE
HEATER SHOULD BE ENERGIZED FOR EIGHT HOURS
Read this manual carefully before attempting to install, operate, or
perform maintenance on this unit. Installation and maintenance
should be performed by qualified service technicians only.
NOTE: “Warnings” and “Cautions” appear at appropriate
places in this manual. Your personal safety and the proper
operation of this air conditioning product require that you follow
them carefully. The manufacturer assumes no liability for
installations or servicing performed by unqualified personnel.
As shipped from the factory, this unit is for use with natural gas only,
and is listed by Underwriters Laboratory.
Model YCZ heating/cooling units are designed for outdoor mount-
ing with a vertical condenser discharge. They can be located either
at ground level or on a roof, in accordance with local codes or
National Fuel Gas Code (ANSI-Z223.1A) Latest Revision. Since
these units are designed exclusively for outdoor operation, addi-
tional flue venting systems are not required. Each unit contains an
operating charge of Refrigerant-22 as shipped.
The following warning complies with State of California law, Proposition 65.
▲
WARNING:
This product contains
fiberglass wool insulation! Fiberglass dust and ceramic
fibers are believed by the State of California to cause
cancer through inhalation. Glasswool fibers may also
cause respiratory, skin, or eye irritation.
PRECAUTIONARY MEASURES
●
Avoid breathing fiberglass dust.
●
Use a NIOSH approved dust/mist respirator.
●
Avoid contact with the skin or eyes. Wear long-
sleeved, loose-fitting clothing, gloves, and eye
protection.
●
Wash clothes separately from other clothing: rinse
washer thoroughly.
●
Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respirator in these situations.
FIRST AID MEASURES
Eye Contact - Flush eyes with water to remove dust.
If symptoms persist, seek medical
attention.
Skin Contact - Wash affected areas gently with soap
and warm water after handling.
The following warning complies with State of California law, Proposition 65.
▲
WARNING:
Hazardous Gasses!
Exposure to fuel substances or by-products of incomplete
fuel combustion is believed by the state of California to
cause cancer, birth defects, or other reproductive harm.
HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING
WARNING:
