Guide Specifications - Carrier GEMINI SELECT 38APS025-065 Product Data

Guide specifications

Commercial Air-Cooled Condensing Units
®
with Puron Refrigerant (R-410A)
HVAC Guide Specifications
Size Range: 25 to 130 Nominal Tons at 60 Hz
88 to 457 Nominal kW at 50 Hz
Carrier Model Number: 38APD, 38APS
Part 1 — General
1.01 SYSTEM DESCRIPTION
Outdoor-mounted, air-cooled condensing unit with
®
Puron refrigerant (R-410A) suitable for on-the-
ground or rooftop installation. The 38APS unit shall
have one refrigeration circuit and shall consist of
two or three rotary scroll compressors. The 38APD
unit shall have two independent refrigeration circuits
and shall consist of two, four, five or six rotary scroll
compressors. Unit shall have air-cooled coils, pro-
peller-type condenser fans, a control box, and shall
discharge condenser air vertically upward as shown
on certified drawings. Unit shall be used in refrigera-
tion circuit with a central station air-handling unit or
direct-expansion coils.
1.02 QUALITY ASSURANCE
A. Unit performance shall be rated in accordance with
ARI Standard 365, latest edition (U.S.A).
B. Unit construction shall comply with latest edition of
ASHRAE 15 Safety Code, UL 1995, and ASME
applicable codes (U.S.A. codes).
C. Unit shall be manufactured in a facility registered to
ISO 9001:2000 Manufacturing Quality Standard.
D. Base unit shall be constructed in accordance with
UL standards and CSA.
E. Unit cabinet shall be capable of withstanding
500-hour salt-spray exposure per ASTM B117
(scribed specimen).
F. Design pressure shall be 650 psig (4482 kPa).
G. Unit shall be functional checked at the factory.
1.03 DELIVERY, STORAGE, AND HANDLING
Unit shall be shipped as single package and shall
be stored and handled per unit manufacturer's
recommendations.
1.04 WARRANTY (FOR INCLUSION BY SPECIFYING
ENGINEER)
Part 2 — Products
2.01 EQUIPMENT
A. General:
Factory assembled, single-piece, air-cooled condens-
ing unit. Contained within the unit enclosure shall be
all factory wiring, piping, controls, compressors,
nitrogen holding charge, and special features
required prior to field start-up.
B. Unit Cabinet:
1. Cabinet shall be galvanized steel casing with a
baked enamel powder or pre-painted finish.
104
2. Cabinet shall be capable of withstanding 500-hr
salt spray test in accordance with ASTM
(U.S.A.) B-117 standard.
3. Control box access panels shall be hinged for
service access.
4. Lifting holes shall be provided to facilitate
rigging.
C. Fans:
1. Condenser fans shall be direct-drive propeller
type, discharging air vertically upward.
2. All condenser fan motors shall be totally
enclosed 3-phase
lubricated ball bearings, class F insulation
and internal, automatic-reset thermal overload
protection or manual reset calibrated circuit
breakers.
3. Shafts shall have inherent corrosion resistance.
4. Fan blades shall be statically and dynamically
balanced.
5. Condenser-fan openings shall be equipped with
PVC-coated steel wire safety guards.
D. Compressors:
1. Compressors shall be rotary scroll.
2. Operating oil charge and a crankcase heater
control oil dilution.
3. Compressors shall be mounted on two rails hav-
ing rubber in shear vibration isolators.
4. Staging of compressors shall provide unloading
capability. Digital compressor unloading control
shall be available as an option on one circuit
(not available on 065 unit).
5. Compressor motors shall be cooled by refriger-
ant gas passing through motor windings and
shall have either internal line break thermal and
current overload protection or external current
overload modules with compressor temperature
sensors.
E. Condenser Coils:
1. Coil shall be air-cooled microchannel heat
exchanger (MCHX) and shall have a series
of flat tubes containing a series of multiple, par-
allel flow microchannels layered between the
refrigerant manifolds. Microchannel coils shall
consist of a two-pass arrangement. Coil con-
struction shall consist of aluminum alloys for the
fins, tubes and manifolds in combination with a
corrosion-resistant coating on the tubes.
2. Tubes shall be cleaned, dehydrated, and sealed.
3. Assembled condenser coils shall be leak tested
and pressure tested at 650 psig (4482 kPa).
F. Refrigeration Components:
1. Refrigeration circuit components shall include
liquid line temperature relief device, pressure
transducers, liquid line shutoff valve, suction
shutoff valve, suction line accumulators, nitro-
gen holding charge, and compressor oil.
type with permanently