Checklist for Installation and Commissioning of Refrigeration System

1.  Make sure that the commissioning done by approved installation companies
2. Make sure that the CDU is placed in correct position and easy to repair
3. Make sure that place the Equipment in smooth and solid surfaces
4. Make sure that the ventilation space for fixing CDU as per given in the Guidelines
5. Confirm the Unit is not direct contact with sunlight, heat sources and cold wind
6. Confirm the Unit installed is not close to the sea shore area and dust free
7. Check all motors, fans and pump bearings in the Equipment
8. Make sure that the selection of piping as per standard
9. Confirm the pipe is clean and dust free
10. Confirm during starting brazing, always apply nitrogen gas to connecting pipes
11. Confirm after brazing, the pipeline should not have leakage and dust particles
12. Please confirm the suction line should be in proper insulation
13. Confirm the wiring connection of unit as per given in the Installation manual
14. Make sure that the vacuuming done as per given in the Installation manual
15. Confirm Expansion valve, solenoid valve and other check valves should be open during vacuuming
16. Confirm the refrigerant charged as per given in the guidelines
17. Confirm Before starting the refrigeration system, perform all installation work on the Refrigerated display side before powering up the equipment
18. Make sure that all the electrical enclosure’s switches on (located on the front face of the condensing unit)
19. During starting, confirm compressor(s) and fan(s) start running
20. Check the voltage and amperage readings at the compressor terminals
21. Make sure that the compressor and condenser fan rotating in correct direction
22. Make sure that no vibrations or abnormal noises are present. If vibrations or abnormal noises are noted, shut off the group and locate the cause
23. Once the equipment’s operation has been stabilized, check the suction and discharge side pressure and temperature
24. Check Superheat conditions as per our requirements
25. Make sure that the unit is running, to fulfill the commissioning data
26. Confirm the cutoff pressure setting in the suction and discharge side
27. Make sure that crankcase heater is working properly
28. Confirm the Oil level in the compressor is correct
29. Make sure that the receiver valves are opened
30. Confirm the Expansion valve is adjusted as per our requirements
31. Please make sure that the pressure maintained in the refrigeration system is correct
32. Check that the room thermostat is set for normal operation and adjust if required

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Pre-Commissioning Checklist

1. Secure commissioning gauges to the high side of the system, check for a positive charge
2. Check tightness of electrical components and properly terminated
3. Check external fuses/MCB are of correct rating
4. Check units properly earthed
5. Check pipe work is earth bonded
6. Check that the remote on/off switch (if fitted) is in the off position
7. Switch on the controls and individual circuits, primary and secondary, MCBs to the ON position. At this stage the control display panel should be illuminated
8. Check the MCBs in the ON position measure the incoming voltage
9. Check rotation of the Compressor
10. Check voltage and frequency at permanent supply
11. Measure and record the primary and secondary voltages at each of the transformers, adjust tapping if necessary and record on the commissioning document
12. Check all timer settings are correct
13. Check oil level
14. Check fans rotate freely
15. Check system correctly evacuated
16. Check operating of HP/LP cut-out
17. Record Controller Data

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‍Commissioning Checklist

1. Measure and record the compressor Amps
2. Measure and record full speed of Apms of each condenser and evaporator Fans
3. Check the liquid line sight glass is clear and dry
4. Check the superheat setting adjusts the expansion value to maintain a superheat setting of approximately 5 to 8K at all operating loads
5. Check and record the following:

1. Suction and discharge pressure
2. Liquid, discharge and suction line temperatures

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