York R-410A - Manual (Page 8)

251933-YTG-J-1009
8 Johnson Controls Unitary Products
• Barometric Relief Damper - This damper accessory can
be used to relieve internal building air pressure on units
with an economizer without power exhaust. This
accessory includes a rain hood, a bird screen and a fully
assembled damper. With bottom duct connections, the
damper should be mounted over the opening in the return
air panel. With horizontal ductwork, the accessory should
be mounted on the return air duct.
• Enthalpy Accessory Control Kit - This kit contains the
required components to convert a single enthalpy
economizer to dual enthalpy.
• Burglar Bars - Mount in the supply and return openings
to prevent entry into the duct work.
• Flue Exhaust Extension Kit - In locations with wind or
weather conditions which may interfere with proper
exhausting of furnace combustion products, this kit can be
installed to prevent the flue exhaust from entering nearby
fresh air intakes.
• CO
2
Sensor - Senses CO
2
levels and automatically
overrides the economizer when levels rise above the
present limits.
• Coil Guard - Customers can purchase a coil guard kit to
protect the condenser coil from damage. This is not a hail
guard kit.
• Hail Guard - Hail Guard kit is available to prevent unit
from hail damage. This is a sloped hood that fits above
the coil.
• Gas Piping Kit - This kit supplies all necessary fittings
and shut off valve.
Guide Specifications
General
Units shall be manufactured by Johnson Controls Unitary
Products in an ISO 9001 certified facility.
York's ZF/ZR/XP units are convertible single package units.
Although the units are primarily designed for curb mounting on
a roof, they can also be slab-mounted at ground level or set on
steel beams above a finished roof. Cooling only, cooling with
gas heat and cooling with electric heat models are available
with a wide variety of factory-mounted options and field-
installed accessories to make them suitable for almost every
application. All units are self-contained and assembled on full
perimeter base rails with holes in the four corners for overhead
rigging. Every unit is completely piped, wired, charged and
tested at the factory to simplify the field installation and to
provide years of dependable operation. All models (including
those with an economizer) are suitable for either bottom or
horizontal duct connections. Models with power exhaust are
suitable for bottom duct connections only. For bottom duct,
remove the sheet metal panels from the supply and return air
openings through the base of the unit. For horizontal duct,
remove the supply and return air panels on the rear of the unit.
All non-Scroll compressors include crankcase heaters and all
compressors have internal pressure relief. Every refrigerant
circuit includes a liquid line filter-drier, a discharge line high
pressure switch and a suction line with a freezestat and low
pressure/loss of charge switch.The unit control circuit includes
a 75 VA transformer, a 24-volt circuit breaker and a relay board
with a compressor lockout circuit, a terminal strip for thermostat
wiring, plus an additional set of pin connectors to simplify the
interface of additional field controls. All models are CSA listed.
All models include a 1-year limited warranty on the complete
unit. Compressors and electric heater elements carry a 5-year
warranty. Aluminized steel and Stainless steel tubular heat
exchangers carry a 10-year warranty.
Description
Units shall be factory-assembled, single packaged, Electric
Cooling/Gas Heat, Electric Cooling/Optional Electric Heat, Heat
Pump/Optional Electric Heat and are designed for outdoor
mounted installation.
The 3 ton, 4 ton and 5 ton units shall have minimum SEER rat-
ing of 13.0 with heat pumps having a 7.7 H.S.P.F. They shall
have built-in field convertible duct connections for down dis-
charge supply/return or horizontal discharge supply/return, and
be available with factory installed options or field installed
accessories. The units shall be factory wired, piped, charged
with R-410A refrigerant and factory tested prior to shipment. All
unit wiring shall be both numbered and color coded. All units the
cooling performance shall be rated in accordance with DOE
and ARI test procedures. Units shall be CSA listed, classified to
ANSI Z21.47, UL 1995/CSA No. 236 standards.
Unit Cabinet
Unit cabinet shall be constructed of galvanized steel, with
exterior surfaces coated with a non-chalking, powdered paint
finish, certified at 1000 hours salt spray test per ASTMB117
standards. Indoor blower section shall be insulated with a
minimum 1/2” thick insulation, coated on the airside. Aluminum
foil faced insulation shall be used in the furnace compartment
and be fastened with ridged fasteners to prevent insulation from
entering the air stream. Cabinet panels shall be “large” size,
easily removable for servicing and maintenance. Full perimeter
base rails shall be provided to assure reliable transit of
equipment, overhead rigging and proper sealing on roof curb
applications. Disposable 1" filters shall be furnished and be
accessible through a removable access door, sealed airtight.
Units filter track shall be designed to accommodate either 1" or
2" filters. Fan performance measuring ports shall be provided
on the outside of the cabinet to allow accurate air
measurements of evaporator fan performance without removing
panels or creating air by-pass of the coils. Condensate pan
shall be internally sloped and conform to ASHRAE 62-89 self-
draining standards. Condensate connection shall be a minimum
of 3/4” I.D. female and be a ridged mount connection.
Indoor (Evaporator) Fan Assembly
The indoor fan shall be a factory installed direct-drive or belt-
drive assembly that includes an adjustable pitch motor pulley.
Job site selected (B.H.P.) brake horsepower shall not exceed
the motors nameplate horsepower rating, plus the service