Guide specifications
Indoor
HVAC Guide Specifications
Size Range: 5 to 20 Tons
Carrier Model Number: 50XCA
Part 1 — General
1.01SYSTEM DESCRIPTION
Indoor packaged vertical
1.02QUALITY ASSURANCE
A.Units shall be rated in accordance with AHRI Stan- dard 340/360, latest edition, as appropriate.
B.Unit shall be designed to conform to ANSI/ ASHRAE 15, latest revision safety code, and UL Standard 1995, and shall be UL listed under both American and Canadian Standards.
C.Unit shall be built in an ISO 9001:2000 certified manufacturing facility and shall be fully
D.Insulation, adhesive, and liner system shall meet NFPA 90A requirements for flame spread and smoke generation.
1.03 DELIVERY, STORAGE, AND HANDLING
Units shall be stored and handled according to man- ufacturer’s recommendations.
Part 2 — Products
2.01EQUIPMENT
A.General:
B.Unit Cabinet:
1.Cabinet shall be constructed of minimum 18 gage zinc surface alloyed steel with a baked enamel finish. Unit shall be capable of with- standing ASTM B117
2.Cabinet shall be fully insulated.
3.Unit drain pan shall have positive double slope to the drain to prevent standing water in pan.
4.Panels for servicing shall be easily removable.
C.Evaporator Fan Section:
1.Fans shall be double inlet, centrifugal wheel with forward curved blades designed for contin- uous operation. Fan wheel and scroll shall be constructed of steel with corrosion resistant fin- ish, and statically and dynamically balanced.
2.Fan shall be belt drive with an adjustable pitch motor pulley and fixed pitch fan pulley, with permanently lubricated
3.Motor shall be
D.Compressor:
Hermetic scroll compressors shall be internally pro- tected with high pressure relief. Compressors shall be factory rubber shock mounted with internal spring vibration isolators.
E.Coils:
1.Evaporator and condenser coil shall have alumi- num plate fins mechanically bonded to seamless copper tubes with all joints brazed. Tube sheet openings shall be swaged to prevent tube wear. Coils shall be face split design.
2.Direct expansion coil shall be designed and tested in accordance with ANSI/ASHRAE 15, latest revision safety code.
3.Coil and drain pan shall be accessible through service access panels for cleaning.
F.Filter:
Filter frame shall be installed upstream of the cool- ing coil, designed to take a
G.Condenser:
1.Fans shall be double inlet, centrifugal wheel with forward curved blades designed for contin- uous operation. Fan wheel and scroll shall be constructed of steel with corrosion resistant fin- ish, and statically and dynamically balanced.
2.Fan shall be belt drive with an adjustable pitch motor pulley and fixed pitch fan pulley, with permanently lubricated,
3.Motor shall be
H.Operating Characteristics:
Unit shall be capable of providing a constant volume of conditioned air at a specified static pressure within the unit’s normal operating range. Unit shall have
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