Hvac Guide Specifications - Carrier 50HJQ004-016 Product Data

GUIDE SPECIFICATIONS- -- -50TFQ004- -012
Packaged Rooftop Air-to-Air Heat Pump with
Electric Heat Option — Constant Volume
Application

HVAC Guide Specifications

Size Range: 3 to 10 Tons, Nominal (Cooling)
34,600 to 105,000 Btuh,
Nominal (Heating)
4 to 50 kW Nominal (Electric Heating)
Carrier Model Number: 50TFQ
GENERAL
A. SYSTEM DESCRIPTION
Outdoor, rooftop-mounted or slab-mounted, electrically
controlled air-to-air heat pump utilizing a hermetic
compressor for heating and cooling duty. Unit shall discharge
supply air vertically or horizontally as shown on contract
drawings.
B. QUALITY ASSURANCE
1. Unit shall be rated
Standards 210/240 and 270.
2. Unit shall be designed to conform to ASHRAE 15, latest
revision, and in accordance with UL 1995.
3. Unit shall be UL tested and certified in accordance with
ANSI Z21.47 Standard 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
generation.
6. Unit casing shall be capable of withstanding Federal Test
Method Standard No. 141 (Method 6061) 500-hour salt
spray test.
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 at the time of manufacture, shall be available
upon request.
C. DELIVERY, STORAGE, AND HANDLING
Unit(s) shall be stored and handled per manufacturer's
recommendations.
PRODUCTS
A. EQUIPMENT (STANDARD)
1. General
Factory-assembled, single-piece, air-to-air heat pump.
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,
bonderized and coated with a baked enamel finish on all
externally exposed surfaces with primer coated internal
panels.
b. Indoor fan cabinet interior shall be insulated with a
1
minimum / -in. thick flexible fiberglass insulation
2
coated on the air side.
c. Cabinet panels shall be easily removable for servicing.
in accordance with ARI
shall meet NFPA 90A
spread and smoke
amperages, data, and
d. Holes shall be provided in the base rails for rigging
shackles to facilitate overhead rigging, and forklift slots
shall be provided to facilitate maneuvering.
e. Unit shall have a factory-installed, sloped condensate
drain pan made of a non-corrosive material, providing a
3
minimum / -in. connection with both vertical and
4
horizontal drains and shall comply with ASHRAE 62.
f. Unit shall have factory-installed filter access panel to
provide filter access with toolless removal.
g. Unit shall have standard thru-the-bottom power
connection capability.
3. Fans:
a. Indoor blower shall be of the direct-driven or belt-driven,
double inlet, forward-curved centrifugal type. Belt drive
shall include an adjustable-pitch motor pulley.
b. Indoor blower shall be made from steel with a
corrosion-resistant finish and shall be dynamically
balanced.
c. Bearings shall be of the sealed, permanently lubricated,
ball-bearing type for longer life and lower maintenance.
d. Outdoor fan shall be of the direct-driven propeller type
and shall discharge air vertically.
e. 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.
b. Factory rubber shock-mounted and internally spring
mounted for vibration isolation.
5. Coils:
a. Outdoor and indoor coils shall have aluminum plate fins
mechanically bonded to enhanced copper tubes with all
joints brazed.
b. Tube sheet openings shall be belled to prevent tube wear.
c. Indoor coil shall be of the face split design.
d. 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.
(2.) E-Coated aluminum-fin coils shall have a flexible
epoxy polymer coating uniformly applied to all coil
surface areas without material bridging between fins.
Coating process shall ensure complete coil
encapsulation. Color shall be high gloss black with
gloss — 60 deg of 65 to 90% per ASTM D523-89.
Uniform dry film thickness from 0.8 to 1.2 mil on all
surface areas including fin edges. Superior hardness
characteristics of 2H per ASTM D3363-92A and
cross-hatch adhesion of 4B-5B per ASTM
D3359-93. Impact resistance shall be up to 160 in./lb
(ASTM D2794-93). Humidity and water immersion
resistance shall be up to minimum 1000 and 250
hours respectively (ASTM D2247-92 and ASTM
D870-92). Corrosion durability shall be confirmed
through testing to be no less than 1000 hours salt
spray per ASTM B117-90. Coil construction shall be
aluminum fins mechanically bonded to copper tubes.
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