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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.
Read this manual carefully before attempting to install, operate,
or perform maintenance on this unit. Installation and mainte-
nance should be performed by qualified service technicians
only.
As shipped from the factory, this unit is for use with natural gas
only, and is listed by Underwriters Laboratory.
Model YCY-F heating/cooling units are designed for outdoor
mounting 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, additional flue venting systems are not required.
Each unit contains an operating charge of Refrigerant-22 as
shipped.
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.
Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
WARNING:
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury. It may also be used to alert against unsafe practices
and where property-damage-only accidents could occur.
▲
▲
Warnings and Cautions appear at appropriate locations throughout this manual.
Read these carefully.
NOTICE
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
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.