Guide Specifications - York AFFINITY R-410A Technical Manual

2ET07700224 and 2ET04700224 are used. Standard in
all BHX units.
• Filter/Frame Kit (Single Phase Only) - Kit contains the
necessary hardware to field install return air filters into the
base unit. Pre-cut filter racks and appropriate cleanable
standard size filters are shipped in one kit. The filter rack
is suitable for either 1" or 2" filters. (1" filter is supplied)
This kit is available for single phase horizontal or vertical
duct application only. Standard in all 3 Phase models.
• Motorized Fresh Air Damper - Designed for duct
mounted side supply/return and unit mounted down
supply/return applications. Damper capable of providing
0% through 50% of outdoor air (field supplied). Closes on
power loss, includes hood and screen assembly.
• Rectangle To Round Adapters - Kit includes one supply
and one return air rectangle to round duct adapter.
Adapters are preformed and designed to fit over current
duct openings on the base unit. Transition is from side
square duct opening to 14" round duct opening.
• Roof Curbs - NRCA approved curbs provide proper fit to
base unit for rooftop installations. Curbs are designed to
be assembled through hinge pins in each corner. Kit also
provides seal strip to assure a water tight seal. 8 and 14
inch high roof curbs are available.
• Manual Outdoor Damper - Provides 0% through 50%
outdoor air capability (field adjustable). Designed for duct
mounted side supply/return applications. Includes hood
and screen assembly.
• Wall Thermostat - The units are designed to operate with
24-volt electronic and electro-mechanical thermostats. All
units can operate with single stage heat/single stage cool
thermostats - with or without the economizer.
• Low Ambient Kit - Kit provides necessary hardware to
convert unit to operate in cooling cycle down to 0º F.
Standard unit operation 45º F.
• Transformer Kit - Kit provides necessary hardware to
provide single phase models from factory furnished 40 VA
transformer capability to 75 VA transformer capability.
(Required on installations with economizer or motorized
damper.)

Guide Specifications

General
Units shall be manufactured by York International Unitary
Products Group in an ISO 9001 certified facility. YORK's
Affinity™ package units give you the flexibility and choices you
need in today's market. These packaged heat pumps are
designed for outdoor installation. Only utility and duct
connections are required at the point of installation.
Description
Units shall be factory-assembled, single packaged, heat pump
units, designed for outdoor mounted installation. For SEER
Johnson Controls Unitary Products
ratings, refer to technical literature. They shall have built in,
equal size, field convertible duct connections for down
discharge supply/return or horizontal discharge supply/return.
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 shall be
manufactured in a facility certified to ISO 9001 standards, and
the cooling performance shall be rated in accordance with DOE
and ARI test procedures. The heating performance shall be
rated to DOE and GAMA test procedures. Units shall be CSA
listed and classified to ANSI Z21.47/CAN/CSA 2.3 standards
and UL 1995/CAN/CSA No. 236-M90 conditions.
Unit Cabinet
Unit cabinet shall be constructed of G90 galvanized steel, with
exterior surfaces coated with a non-chalking, powdered paint
finish, certified at 1000 hours salt spray test per ASTM-B117
standards. The unit top shall be a single piece "Water Shed"
design, with drip edges and no-seam corners to provide
optimum water integrity. Unit shall have a rigidly mounted
condenser coil guard to provide protection from objects and
personnel after installation. Indoor blower section shall be
insulated with up to 3/4" thick, aluminum, foil faced insulation,
fastened to prevent insulation from entering the air stream.
Cabinet panels shall be "large" size, easily removable for
servicing and maintenance, with built-in lift handles. Unit shall
be built on a formed, "Super-Structure" design base pan, with
embossments at critical points to add strength, rigidity and aid
in minimizing sound. Full perimeter base rails shall be provided
to assure reliable transit of equipment, overhead rigging, for
truck access and proper sealing on roof curb applications. Base
rails shall be removable, when required, to lower unit height.
Filters shall be furnished and be accessible through a
removable access door, sealed airtight. Units vertical discharge
and return duct configuration shall be designed to fit between
standard 24" O.C. beams without modification to building
structure, duct work and base unit. Condensate pan shall be
internally sloped and conform to ASHRAE 62-89 self-draining
standards, with 3/4" NPTI copper, ridged mount connection.
Indoor (Evaporator) Fan Assembly
Fan shall be direct drive design. Fan wheel shall be double-inlet
type with forward-curved blades, dynamically balanced to
operate smoothly throughout the entire range of operation.
Airflow design shall be constant air volume. Bearings shall be
sealed and permanently lubricated for longer life and no
maintenance. Fan assembly shall be "Slip Track" (slide-out)
design for easy removal and cleaning.
Outdoor (Condenser) Fan Assembly
The outdoor fan shall be of the direct-driven propeller type,
discharge air vertically, have aluminum blades riveted to
corrosion resistant steel spider bracket and shall be statically
balanced for smooth operation. The outdoor fan motor shall be
totally enclosed with permanently lubricated bearings and
internally protected against overload conditions.
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