C6.1.11/0718-0619/E
41
4
Start-up & operation
WARNING
High pressure!
Risk of personal injury!
Always keep sufficient distance
from the pressure relief valve to avoid serious injury in the event of a sudden
pressure release.
WARNING
Hot surfaces! Burning!
Do not touch the compressor’s heads or discharge
line as their surfaces can reach high temperatures both during operation and
at standstill.
WARNING
High noise level! Risk of hearing damage!
In case of pressure release of
the pressure relief valve, a sudden, intense sound is produced which can
damage the inner ear and cause hearing loss. Wear earplugs or other
protective devices when involved in any work on or near the unit.
Before commissioning, ensure that all valves on the refrigeration unit are fully opened. Only qualified
personal and certified companies are allowed to perform installation, commissioning, service and
maintenance work.
4.1 Evacuation
IMPORTANT
The evacuation procedure is based upon achieving an actual system vacuum
standard and is NOT TIME DEPENDENT! The installation has to be
evacuated with a vacuum pump before commissioning. Proper evacuation
reduces residual moisture to 50 ppm. The installation of adequately sized
access valves at the furthest point from the compressor in the suction and
liquid lines is advisable. The system must be evacuated down to less than
3 mbar. If required break the vacuum with dry nitrogen. Pressure must be
measured using a vacuum pressure gauge on the access valves and not on
the vacuum pump. This serves to avoid incorrect measurements resulting from
the pressure gradient along the connecting lines to the pump.
IMPORTANT
Care must be taken that all components (solenoids, expansion devices,
regulators, shut off valves, etc…) in the refrigeration cycle, which separate a
part of the installation when de-energized, are manually opened to guarantee
successful evacuation in the whole piping system.
NOTE: The controller must be turned on before starting the evacuation.
NOTE: For proper evacuation, both the HPV and BPV regulating valves must be opened using
the evacuation mode in the unit controller.
To activate the evacuation mode:
1)
Press the
SERVICE
key to enter the "Service" menu
Figure 56: Service key
2)
Use the
UP
and
DOWN
keys to select the "Evacuation mode" sub-menu
3)
Press
ENB
to enable the evacuation mode (see
Figure 57)
:
Summary of Contents for Copeland EazyCool OME-4MTL-09X
Page 1: ...Copeland Eazycool CO2 Refrigeration Units Application Guidelines ...
Page 5: ......
Page 68: ...C6 1 11 0718 0619 E 63 ...
