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C6.1.11/0718-0619/E
4.4 Checks before starting & during operation
IMPORTANT
Liquid valves not fully opened! Liquid trap!
Both valves on the liquid line
should be fully opened in order to prevent liquid trapping.
Before a system runs for the first time:
▪
Check that the valves on the liquid line are fully opened except for HPV and BPV valves.
▪
Set the essential parameters of the electronic controller in the programming level 1 (compressor
cut-out/cut-in settings, condensing fan setpoint
….) according to the required application.
▪
Carry out visual inspection.
▪
Perform control tests to ensure all controls operate correctly, including any manual backup
system.
▪
Check also the following:
✓
Documentation for the system and its marking, especially pressure equipment
✓
Installation of safety devices
✓
Set pressure of all safety devices and other pressure cut-outs
✓
Compressor and oil reservoir oil levels
✓
Cores fitted in filter dryers
✓
Pressure test records
✓
All valves open/closed as required for operation
After start-up and when operation conditions have stabilised:
▪
It is recommended to check the oil level in the compressor and to add oil if necessary to ensure
a sufficient oil level (halfway up the sight glass).
▪
The following should also be checked:
✓
Refrigerant level
✓
Oil level in oil reservoir
✓
Expansion valve superheat
✓
Regulating valves in both subcritical and transcritical modes
✓
Operating pressure of receiver pressure regulating valve
✓
Operation of any auxiliary cooling unit
Summary of Contents for Copeland EazyCool OME-4MTL-09X
Page 1: ...Copeland Eazycool CO2 Refrigeration Units Application Guidelines ...
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Page 68: ...C6 1 11 0718 0619 E 63 ...
