York EA090 Technical Manual

TECHNICAL GUIDE
SPLIT-SYSTEM
HEAT PUMPS
EA090/FA090
208/230/460
VOLT ONLY
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE

DESCRIPTION

®
YORK has combined the latest concepts in modern technology with
time-proven quality standards to design a split-system heat pump to
meet the demands of the energy-and quality-conscious commercial
market.
Both the outdoor and indoor units are completely piped and wired at
the factory. Only the interconnecting liquid and vapor lines are required
to complete the refrigerant circuit. Every unit is dehydrated, evacuated,
leak tested and pressure tested before being pressurized with a hold-
ing charge of refrigerant-22 for shipment and/or storage. The compres-
sor, the fan motors and the controls are functionally tested after the
units are fabricated to assure a reliable start-up and years of depend-
able operation.
These units have been tested by Underwriters' Laboratories and will
be shipped with UL and CUL labels.

OUTDOOR UNIT

Every outdoor unit includes a heavy-duty compressor with a crankcase
heater, line break overload protection, a suction line accumulator with
a fusible plug, a 4-way reversing valve with a 24-volt solenoid, outdoor
fan motor(s) with inherent protection, and a copper tube/aluminum fin
coil that is positioned vertically for better drainage of the water that will
condense on it during the heating cycle.
They also include a filter-drier, an expansion valve and a distributor
that are only used during the heating cycle plus a check valve to pro-
vide the proper flow of refrigerant through the unit during both the cool-
ing and heating cycles.
To eliminate the costly cabinet deterioration problems usually associ-
ated with outdoor equipment, all sheet metal parts are constructed of
commercial grade (G90) galvanized steel. After fabrication, each part
is thoroughly cleaned to remove any grease or dirt from its surfaces.
The parts that will be exposed to the weather are then coated with a
"desert sand" powder paint to assure a quality finish for many years.
This coating system has passed the 750 hour, salt spray test per
ASTM Standard B117. To assist in servicing, the high and low pressure
service connections are exterior to the cabinet, allowing simple
access.
The fan guards are vinyl-coated to provide additional rust protection.
An optional decorative coil guard is available to protect the coil on the
outdoor unit.

INDOOR UNIT

Every indoor unit includes a well-insulated cabinet, a copper tube/alu-
minum fin coil, 1" throwaway filters, a centrifugal blower, a blower
motor, adjustable drive components, a blower motor contactor and a
small holding charge of refrigerant-22.
They also include a filter-drier, an expansion valve and a distributor
that are only used during the cooling cycle plus a check valve to pro-
vide the proper flow of refrigerant through the coil during both the cool-
ing and heating cycles.
The units are shipped in the vertical position ready for field installation.
For horizontal installation, interchange the solid bottom panel and the
return air duct flange on the front of the unit.
036-21371-001-B-0203