Guide Specifications — 50Heq003-006 - Carrier 50HJQ004-016 Product Data

GUIDE SPECIFICATIONS — 50HEQ003-006
Packaged Rooftop Air-to-Air Heat Pump —
Constant Volume Application
HVAC Guide Specifications
Size Range: 2 to 5 Tons, Nominal (Cooling)
28,000 to 58,500 Btuh,
Nominal (Heating)
4 to 50 kW Nominal (Electric Heating)
Carrier Model Number: 50HEQ
GENERAL
A. SYSTEM DESCRIPTION
Outdoor rooftop-mounted electrically controlled air-to-air
heat pump utilizing a scroll compressor for cooling duty and
electric resistance coils for heating duty. Unit shall discharge
supply air vertically or horizontally as shown on contract
drawings.
B. QUALITY ASSURANCE
1. Unit shall be rated in accordance with ARI Standards
210/240 or 360 and 270. Designed in accordance with UL
Standard 1995. Units shall be Energy Star qualified.
2. Unit shall be designed to conform to ASHRAE 15, latest
revision.
3. Unit shall be UL-tested and certified in accordance with
ANSI Z21.47 Standards and UL-listed and certified under
Canadian standards as a total package for safety
requirements.
4. Roof curb shall be designed to conform to NRCA
Standards.
5. Insulation and adhesive
requirements for flame spread and smoke generation.
6. Unit casing shall
500-hour salt spray exposure per ASTM B117 (scribed
specimen).
7. Unit shall be designed in accordance with ISO 9001:2000,
and shall be manufactured in a facility registered to ISO
9001:2000.
8. Each unit shall be subjected to a completely automated run
testing on the assembly line. A factory-supplied printout
indicating tested pressures,
inspectors; shall be provided upon request at the time of
manufacture.
C. DELIVERY, STORAGE, AND HANDLING
Unit shall be stored and handled per manufacturer's
recommendations.
PRODUCTS
A. EQUIPMENT (STANDARD)
1. General:
Factory assembled, single-piece
Contained within the unit enclosure shall be all factory
wiring, piping, controls, refrigerant charge (R-22), and
special features required prior to field start-up.
2. Unit Cabinet:
a. Unit cabinet shall be constructed of galvanized steel, and
shall be bonderized and coated with a prepainted baked
enamel finish on all externally exposed surfaces.
shall meet NFPA 90A
be capable of withstanding
amperages, data, and
heat pump unit.
b. Evaporator fan compartment interior cabinet surfaces
shall be insulated with a minimum
density, flexible fiberglass insulation, neoprene coated on
the air side. Aluminum foil-faced fiberglass insulation
shall be used in the gas heat compartment.
c. Cabinet panels shall be easily removable for servicing.
d. Holes shall be provided in the base rails for rigging
shackles to facilitate maneuvering and overhead rigging.
e. Unit shall have a factory-installed, sloped condensate
drain pan made of a non-corrosive material, providing a
3
minimum / -in-14 NPT connection with both vertical
4
and horizontal drains, and shall comply with ASHRAE
Standard 62.
f. Unit shall have a factory-installed filter access panel to
provide filter access with toolless removal.
g. Unit shall have standard thru-the-bottom power
connection capability (accessory kit is required).
3. Fans:
a. Indoor Fan:
(1.) Fan shall be direct or belt driven as shown on the
equipment drawings. Belt drive shall include an
adjustable-pitch motor pulley.
(2.) Fan wheel shall be double-inlet type with
forward-curved blades.
(3.) Bearings shall be sealed, permanently
ball-bearing type for longer life and lower
maintenance.
(4.) Indoor fan shall be made from steel with a
corrosion-resistant finish and shall be dynamically
balanced.
b. Outdoor fan shall be of the direct-driven (with totally
enclosed motors) propeller type and shall discharge air
vertically.
c. Outdoor fan shall have aluminum blades riveted to
corrosion-resistant steel spiders and shall be dynamically
balanced.
4. Compressor(s):
a. Fully hermetic type, internally protected scroll-type.
b. Factory mounted on rubber grommets and internally
spring mounted for vibration isolation.
c. On dual electrically and mechanically independent
circuits (008,012).
5. Coils:
a. Standard indoor and outdoor coils shall have copper or
aluminum plate fins mechanically bonded to seamless
internally grooved copper tubes with all joints brazed.
b. Testing:
(1.) Evaporator and condenser coils shall be qualified to
UL 1995 burst test at 2,200 psi.
(2.) Evaporator and condenser coils shall be leak tested
to 150 psig and pressure tested to 400 psig.
c. Coils:
(1.) Copper-fin coils shall be constructed of copper fins
mechanically bonded to copper tubes and copper
tube sheets. Galvanized steel tube sheets shall not be
acceptable. A polymer strip shall prevent coil
assembly from contacting the sheet metal coil pan to
minimize potential for galvanic corrosion between
coil and pan. All copper construction shall provide
protection in moderate coastal environments.
168
1
/ -in. thick, 1 lb
2
lubricated