Carrier AQUASNAP 30RB060-390 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 116

7. Electrical circuit protection has been sized and installed properly.
8. All terminals are tight.
9. All plug assemblies are tight.
10. All cables, thermistors and transducers have been inspected for cross wires.
11. All thermistors are fully inserted into wells.
12. Crankcase heaters energized for 24 hours before start-up.
13. All armatures more freely on contactors.
Chilled Water System Check
1. All chilled water valves are open.
2. All piping is connected properly.
3. All air has been purged from the system.
4. Chilled water pump is operating with the correct rotation.
5. Chilled water pump starter interlocked with chiller.
6. Chilled water flow switch operational.
7. Inlet piping to cooler includes a 20 mesh strainer.
8. Water loop volume greater than 3 gal/ton for air conditioning
or 6 gal/ton for process cooling and low ambient operation.
9. Proper loop freeze protection provided to ____ F (C).
Antifreeze type__________________ Concentration _____%.
(If antifreeze solution is not utilized on 30RB machines and the
minimum outdoor ambient is below 32 F (0 C)
then items 10 and 11 have to be completed to provide cooler
freeze protection to –20 F. Refer to Installation Instructions
for proper cooler winterization procedure.)
10. Outdoor piping wrapped with electric heater tape.
11. Cooler heaters installed and operational.
12. Is the unit equipped with low ambient head pressure control?
a. If yes, are wind baffles installed? (Required if chiller will run below 32 F
and be exposed to the wind.)
13. Are there any VFDs on the chilled water pumps?
a. Primary loop
b. Secondary loop
C. UNIT START-UP
1. All liquid line service valves located near EXVs are open.
2. All discharge service valves are open.
3. All suction service valves are open.
4. All compressor rack holddown bolts removed.
5. Leak check unit. Locate, repair and report any refrigerant leaks.
6. Voltage at terminal block is within unit nameplate range.
7. Check voltage imbalance: A-B______ A-C______B-C______
Average voltage = __________ (A-B + A-C + B-C)/3
Maximum deviation from average voltage = _______
Voltage imbalance = ______% (max. deviation / average voltage) X 100
Is voltage imbalance less than 2%.
(DO NOT start chiller if voltage imbalance is greater than 2%.
Contact local utility for assistance.)
8. Verify cooler flow rate
Pressure entering cooler
Pressure leaving cooler
Cooler pressure drop
Psig x 2.31 ft./psi =
kPa x 0.334 m/psi =
Cooler flow rate _____ gpm (l/s) (See Cooler Pressure Drop Curve provided in the 30RB Installation Instructions.)
9. Verify that isolation valves on factory-installed pump packages are properly
positioned and locked prior to start-up (slot in-line with piping on both sides of pump).
_____ psig (kpa)
_____ psig (kpa)
_____ psig (kpa)
_____ ft of water
_____ m of water
CL-2
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