69
Air-Cooled Liquid Chiller
HVAC Guide Specifications
Size Range:
10 to 90 Nominal Tons
(35 to 316 Nominal kW)
Carrier Model Number:
30RAP
Part 1 — General
1.01 SYSTEM DESCRIPTION
Microprocessor controlled, air-cooled liquid chiller
utilizing scroll compressors, low sound fans, elec-
tronic expansion valve, optional hydronic pump sys-
tem, and fluid storage tank (storage tank on models
010-060 only).
1.02 QUALITY ASSURANCE
A. Unit shall be rated in accordance with AHRI Stan-
dard 550/590, latest edition (U.S.A.) and all units
shall be ASHRAE 90.1 compliant.
B. Unit construction shall comply with ASHRAE 15
Safety Code, UL latest edition, and ASME applica-
ble codes (U.S.A. codes).
C. Unit shall be manufactured in a facility registered to
ISO 9001 Manufacturing Quality Standard.
D. Unit shall be full load run tested at the factory.
1.03 DELIVERY, STORAGE AND HANDLING
A. Unit controls shall be capable of withstanding
150 F (66 C) storage temperatures in the control
compartment.
B. Unit shall be stored and handled per unit manufac-
turer's recommendations.
Part 2 — Products
2.01 EQUIPMENT
A. General:
Factory assembled, single-piece chassis, air-cooled
liquid chiller. Contained within the unit cabinet shall
be all factory wiring, piping, controls, refrigerant
charge (R-410A), and special features required prior
to field start-up.
B. Unit Cabinet:
1. Frame shall be of heavy-gage, galvanized steel.
2. Exterior panels shall be galvanized steel with a
baked enamel powder or pre-painted finish.
3. Cabinet shall be capable of withstanding
500-hour salt spray test in accordance with the
ASTM (U.S.A.) B-117 standard.
C. Fans:
1. Condenser fans shall be direct-driven, 9-blade
airfoil cross-section, reinforced polymer con-
struction, shrouded-axial type, and shall be stat-
ically and dynamically balanced with inherent
corrosion resistance.
2. Fan operation shall allow reduced sound levels
during scheduled unoccupied operating periods.
Manufacturers without unoccupied reduced
sound capability shall submit
1
/
3
octave band
data and sound power data as measured
according to AHRI 370 as confirmation of unit
sound characteristics.
3. Air shall be discharged vertically upward.
4. Fans shall be protected by coated steel wire
safety guards.
D. Compressor/Compressor Assembly:
1. Fully hermetic, direct-drive, scroll type
compressors.
2. 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.
3. Compressors shall be mounted on rubber in
shear vibration isolators.
4. Staging of compressors shall provide unloading
capability. Digital compressor unloading control
shall be available as an option.
E. Cooler:
1. Cooler shall be rated for a refrigerant working-
side pressure of 505 psig (3482 kPa) on sizes
010-025 and 565 psig (3896 kPa) on sizes
030-090 and shall be tested for a maximum
water-side pressure of 300 psig (2068 kPa) or
150 psig (1034 kPa) when optional hydronic
package is installed.
2. Shall be single-pass, ANSI type 316 stainless
steel, brazed plate construction.
3. Shell shall be insulated with
3
/
4
-in. (19 mm)
closed-cell, polyvinyl-chloride foam with a maxi-
mum K factor of 0.28.
4. Shall incorporate 2 independent refrigerant cir-
cuits on sizes 035 to 090; sizes 010 to 030
shall have one independent refrigerant circuit.
5. Cooler shall have an optional factory-installed
heater, to protect cooler from ambient tempera-
ture freeze down to –20 F (–29 C).
6. Unit shall be provided with a factory-installed
flow switch.
7. All connections shall use standard Victaulic-type
fittings.
F. Condenser:
1. Coil shall be air-cooled Novation
®
heat
exchanger technology with microchannel
(MCHX) coils and shall have a series of flat
tubes containing a series of multiple, parallel
flow microchannels layered between the refrig-
erant manifolds. Coils shall consist of a two-
pass arrangement. Coil construction shall con-
sist of aluminum alloys for fins, tubes, and man-
ifolds in combination with a corrosion-resistant
coating.
2. Tubes shall be cleaned, dehydrated, and sealed.
Guide specifications
Summary of Contents for Aquasnap 30RAP010
Page 14: ...14 a30 5349 Base unit dimensions 30RAP070 090...
Page 15: ...15 ACCESSORY STORAGE TANK FOR UNIT SIZES 010 015 a30 4879 Accessory dimensions...
Page 16: ...16 ACCESSORY STORAGE TANK FOR UNIT SIZES 018 030 a30 4880 Accessory dimensions cont...
Page 17: ...17 ACCESSORY STORAGE TANK FOR UNIT SIZES 035 060 a30 4881...
Page 60: ...60 600 760 a30 5264 Typical control wiring schematic...
Page 75: ......
