Guide Specifications - Carrier AQUAFORCE 30XA080-500 Product Data

Guide specifications

Air-Cooled Liquid Chiller
HVAC Guide Specifications
Size Range: 80 to 500 Tons, Nominal
Carrier Model Number: 30XA
Part 1 — General
1.01 SYSTEM DESCRIPTION
Microprocessor controlled, air-cooled liquid chiller
utilizing screw compressors and low sound fans.
1.02 QUALITY ASSURANCE
A. Unit shall be rated in accordance with ARI Standard
550/590 (U.S.A.).
B. Unit construction shall comply with 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. Unit shall be full load run tested at the factory.
1.03 DELIVERY, STORAGE AND HANDLING
A. Unit controls shall
standing 150 F (65.5 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-134a), and special features required prior
to field start-up.
B. Unit Cabinet:
1. Frame shall be of heavy-gage, painted galva-
nized steel.
2. Cabinet shall be galvanized steel casing 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. Air shall be discharged vertically upward.
3. Fans shall be protected by coated steel wire
safety guards.
D. Compressor/Compressor Assembly:
1. Comprised of semi-hermetic twin screw type
compressors.
2. Compressor motor shall be direct drive,
3500 rpm, protected by motor temperature
sensors, suction gas cooled motor.
50
be capable of with-
3. Capacity control shall utilize an infinitely modu-
lating slide valve to modulate capacity from
100% to 15% full load.
E. Cooler:
1. Shall be a mechanically cleanable tubes in a
shell-and-tube type cooler with removable
heads.
2. Tubes shall be internally enhanced seamless-
copper type rolled into tube sheets.
3. Shall be equipped with Victaulic-type water
connections.
4. Shell shall be insulated with
(closed-cell) with a maximum K factor of 0.28.
5. Design shall incorporate a minimum of 2 or 3
independent refrigerant circuits.
6. Cooler shall be tested and stamped in accor-
dance with ASME Code for a refrigerant work-
ing side pressure of 220 psig. Cooler shall have
a maximum water-side pressure of 300 psig.
7. Cooler shall have a cooler drain and vent.
8. Low-ambient temperature protection: unit shall
have factory-installed
pumpout cycle to protect cooler from ambient
temperature freeze down to 0° F (–15 C).
F. Condenser:
1. Coil shall be air-cooled with integral subcooler,
and shall be constructed of aluminum fins
mechanically bonded to seamless copper tubes.
2. Tubes shall be cleaned, dehydrated, and sealed.
3. Assembled condenser coils shall be leak tested
and pressure tested at 375 psig (2585 kPa).
G. Refrigeration Components:
Refrigerant circuit
replaceable-core filter drier, moisture indicating sight
glass, electronic expansion valve, discharge service
valves and liquid line service valves, and complete
operating charge of both refrigerant R-134a and
compressor oil.
H. Controls, Safeties, and Diagnostics:
1. Unit controls shall include the following mini-
mum components:
a. Microprocessor with non-volatile memory.
Battery backup system shall not be accepted.
b. Separate terminal block for power and
controls.
c. Separate 115-v power supply to serve all
controllers, relays, and control components.
d. ON/OFF control switch.
e. Replaceable solid-state controllers.
f. Pressure sensors installed to measure suc-
tion, oil, economizer, and discharge pressure.
Thermistors installed to measure cooler
entering and leaving fluid temperatures and
outside air temperature.
3
/ -in. PVC foam
4
cooler heater,
components shall include
and