York 60 Mechanical Specifications, General Description, Unit Cabinet, Indoor Supply Fan Assembly

036-21564-002-A-0404

MECHANICAL SPECIFICATIONS

GENERAL DESCRIPTION

Units shall be factory--assembled, single packaged Heat Pumps, designed for outdoor mounted installation. Units shall have minimum SEER ratings of 10.0. They shall have built in field convertible duct connections for down discharge 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--22 refrigerant and factory tested prior to shipment. All unit wiring shall be both numbered and color coded. Enclosed in each unit shall be a factory test log sheet consisting of the unit tested pressures, temperatures and amps, as tested prior to shipment.

All units shall be manufactured in a facility certified to ISO 9001 standards, and the cooling & heating performance shall be rated in accordance with DOE and ARI test procedures. Units shall be listed under UL 1995/CAN/CSA No. 236--M90 conditions.

UNIT CABINET

1.Unit cabinet shall be constructed of G90 galvanized steel, with exterior surfaces coated with a non--chalking, powered paint finish, certified at 750 hours salt spray test per ASTM--B117 standards.

2.Indoor blower section shall be insulated with up to 1" thick insulation, coated on the air side. Aluminum foil faced insulation shall be used in the furnace compart- ment and be fastened with ridged fasteners to prevent in- sulation from entering the air stream.

3.Cabinet panels shall be “large” size, easily removable for servicing and maintenance.

4.Full perimeter base rails shall be provided to assure reli- able transit of equipment, overhead rigging, fork truck ac- cess and proper sealing on roof curb applications.

5.Disposable 1" filters shall be furnished and be accessible through a removable access door, sealed air tight. Units filter track shall be designed to accommodate either 1" or 2" filters.

6.Fan performance measuring ports shall be provided on the outside of the cabinet to allow accurate air measure- ments of evaporator fan performance without removing panels or creating air by--pass of the coils.

7.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.

8.Condensate pan shall be internally sloped and conform to ASHARE 62--89 self--draining standards. Condensate connection shall be a minimum of 3/4" I.D. female and be a ridged mount connection.

INDOOR (SUPPLY) FAN ASSEMBLY

1.Fan shall be direct drive, multi--speed, or a factory in- stalled belt drive, adjustable--pitch motor pulley option. Job site selected (BHP) brake horse power shall not ex- ceed the motors nameplate horse power rating, plus the service factor. Units shall be designed not to operate above service factor.

2.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.

3.Bearings shall be sealed and permanently lubricated for longer life and no maintenance.

OUTDOOR FAN ASSEMBLY

1.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 dynamically balanced for smooth operation.

2.The outdoor fan motor shall be totally enclosed with permanently lubricated bearings and internally protected against overload conditions.

REFRIGERANT COMPONENTS

1.Compressors:

A.Shall be fully hermetic type, direct drive, internally pro- tected with internal high--pressure relief and over tem- perature protection. The hermetic motor shall be suction gas cooled and have a voltage range of + or -- 10% of the unit nameplate voltage.

B.Shall have internal isolation and sound muffling to mini- mize vibration and noise, and be externally isolated on a dedicated, independent mounting.

2.Coils:

A.Evaporator and condenser coils shall have aluminum plate fins mechanically bonded to seamless internally-- enhanced copper tubes with all joints brazed. Special Phenolic coating shall be available as a factory option.

B.Evaporator and Condenser coils shall be of the direct expansion, draw--thru design.

3.Refrigerant Circuit and Refrigerant Safety Components shall include:

A.Independent fixed--orifice expansion devices.

B.Filter drier/strainer to eliminate any moisture or foreign matter.

C.Accessible service gage connections on both suction and discharge lines to charge, evacuate, and measure refrigerant pressure during any necessary servicing or troubleshooting, without losing charge.

D.The refrigeration system shall provide at least 15° F of liquid sub--cooling at design conditions.

E.Unit shall have a suction line accumulator.

4.Unit Controls:

A.Unit shall be complete with self contained low--voltage control circuit protected by a resetable circuit breaker fuse on the 24 volt transformer side.

B.Unit shall incorporate a lock--out circuit which provides reset capability at the space thermostat or base unit, should any of the following standard safety devices trip and shut off compressor:

20 Unitary Products Group