D. Electrical
1. The main and control power supply is available, and voltage is set within
acceptable range.
2. The insulation resistance of each motor and MCB secondary side is within
acceptable range.
3. All wiring is complete from the main power supply to the power panel, but is
not cut to final length or connected to the panel.
4. The wiring between the control panel and the residential hot water control
valve are connected properly.
5. The external control wiring is completed from the control panel to the water
pump motor starters, and other related equipment.
E. Additional service vacuum pump
1. Confirm the vacuum pump motor rotation is correct.
2. Verify the vacuum pump is charged with the correct amount of lubricant oil.
F. Evacuate Nitrogen charge
1. Remove the plug and open the absorber purging valve.
2. Evacuate nitrogen gas until the HT-GEN compound gauge indicates
approximately 0.005 MP.a.G (0.725 PSI).
3. Connect the vacuum hose of the additional service vacuum pump with the
absorber purging valve.
4. Evacuate the nitrogen gas until the HT-GEN compound gauge indicates
approximately -0.1 MP.a.G (-14.5 PSI).
5. Close all open manual valves.
6. Close the absorber purging valve and stop the service vacuum pump.
G. Panel checks
1. The thermal relays conform to the pump specification.
2. The interlock (answerback) signal for the chilled/hot water pump and cooling
water pump is available.
3. The indicators on the control panel are correct.
4. The temperature setting parameters for capacity control are correct.
5. The date and time reflect local time zone.
6. The rotation direction of the solution circulation pump, refrigerant pump, and
burner fan is correct.
7. The water flow suspension switch works properly.
YHAU-CGN/H-CXR(M) Small Direct Fired Absorption Chiller-Heater Checklist
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Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
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