York AFFINITY R-410A Technical Manual

Also see for Affinity BHZ024: Technical guide

Contents

York AFFINITY R-410A Technical Manual Manual pdf 5 page image

333495-YTG-C-0908Johnson Controls Unitary Products 52ET07700224 and 2ET04700224 are used. Standard inall BHX units.• Filter/Frame Kit (Single Phase Only) - Kit contains thenecessary hardware to field install return air filters into thebase unit. Pre-cut filter racks and appropriate cleanablestandard size filters are shipped in one kit. The filter rackis suitable for either 1" or 2" filters. (1" filter is supplied)This kit is available for single phase horizontal or verticalduct application only. Standard in all 3 Phase models.• Motorized Fresh Air Damper - Designed for ductmounted side supply/return and unit mounted downsupply/return applications. Damper capable of providing0% through 50% of outdoor air (field supplied). Closes onpower loss, includes hood and screen assembly.• Rectangle To Round Adapters - Kit includes one supplyand one return air rectangle to round duct adapter.Adapters are preformed and designed to fit over currentduct openings on the base unit. Transition is from sidesquare duct opening to 14" round duct opening.• Roof Curbs - NRCA approved curbs provide proper fit tobase unit for rooftop installations. Curbs are designed tobe assembled through hinge pins in each corner. Kit alsoprovides seal strip to assure a water tight seal. 8 and 14inch high roof curbs are available.• Manual Outdoor Damper - Provides 0% through 50%outdoor air capability (field adjustable). Designed for ductmounted side supply/return applications. Includes hoodand screen assembly.• Wall Thermostat - The units are designed to operate with24-volt electronic and electro-mechanical thermostats. Allunits can operate with single stage heat/single stage coolthermostats - with or without the economizer.• Low Ambient Kit - Kit provides necessary hardware toconvert unit to operate in cooling cycle down to 0º F.Standard unit operation 45º F.• Transformer Kit - Kit provides necessary hardware toprovide single phase models from factory furnished 40 VAtransformer capability to 75 VA transformer capability.(Required on installations with economizer or motorizeddamper.)Guide SpecificationsGeneralUnits shall be manufactured by York International UnitaryProducts Group in an ISO 9001 certified facility. YORK’sAffinity™ package units give you the flexibility and choices youneed in today’s market. These packaged heat pumps aredesigned for outdoor installation. Only utility and ductconnections are required at the point of installation.DescriptionUnits shall be factory-assembled, single packaged, heat pumpunits, designed for outdoor mounted installation. For SEERratings, refer to technical literature. They shall have built in,equal size, field convertible duct connections for downdischarge supply/return or horizontal discharge supply/return.The units shall be factory wired, piped, charged with R-410ARefrigerant and factory tested prior to shipment. All unit wiringshall be both numbered and color coded. All units shall bemanufactured in a facility certified to ISO 9001 standards, andthe cooling performance shall be rated in accordance with DOEand ARI test procedures. The heating performance shall berated to DOE and GAMA test procedures. Units shall be CSAlisted and classified to ANSI Z21.47/CAN/CSA 2.3 standardsand UL 1995/CAN/CSA No. 236-M90 conditions.Unit CabinetUnit cabinet shall be constructed of G90 galvanized steel, withexterior surfaces coated with a non-chalking, powdered paintfinish, certified at 1000 hours salt spray test per ASTM-B117standards. The unit top shall be a single piece “Water Shed”design, with drip edges and no-seam corners to provideoptimum water integrity. Unit shall have a rigidly mountedcondenser coil guard to provide protection from objects andpersonnel after installation. Indoor blower section shall beinsulated 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 forservicing and maintenance, with built-in lift handles. Unit shallbe built on a formed, “Super-Structure” design base pan, withembossments at critical points to add strength, rigidity and aidin minimizing sound. Full perimeter base rails shall be providedto assure reliable transit of equipment, overhead rigging, fortruck access and proper sealing on roof curb applications. Baserails shall be removable, when required, to lower unit height.Filters shall be furnished and be accessible through aremovable access door, sealed airtight. Units vertical dischargeand return duct configuration shall be designed to fit betweenstandard 24” O.C. beams without modification to buildingstructure, duct work and base unit. Condensate pan shall beinternally sloped and conform to ASHRAE 62-89 self-drainingstandards, with 3/4” NPTI copper, ridged mount connection.Indoor (Evaporator) Fan AssemblyFan shall be direct drive design. Fan wheel shall be double-inlettype with forward-curved blades, dynamically balanced tooperate smoothly throughout the entire range of operation.Airflow design shall be constant air volume. Bearings shall besealed and permanently lubricated for longer life and nomaintenance. Fan assembly shall be “Slip Track” (slide-out)design for easy removal and cleaning.Outdoor (Condenser) Fan AssemblyThe outdoor fan shall be of the direct-driven propeller type,discharge air vertically, have aluminum blades riveted tocorrosion resistant steel spider bracket and shall be staticallybalanced for smooth operation. The outdoor fan motor shall betotally enclosed with permanently lubricated bearings andinternally protected against overload conditions.