Thermo Scientific XBF40-MD Series Installation, Operation And Service Manual page 45

Thermo Scientific XBF40-MD Series Blast Freezers
BREAK THE VACUUM WITH REFRIGERANT AND CHARGING
5. Close the gauge manifold hand valves and the vacuum pump shut off
valve. Shut the pump off and change the center manifold hose to the
service cylinder of the appropriate refrigerant. Purge the center hose for
one or two seconds with gas from the service cylinder and then crack the
refrigerant cylinder valve and the manifold discharge hand valve. Gas
will flow into the compressor crankcase.
6. Charge the system to the required data plate amount, this can be done
by weighing the cylinder.
7. Remove gauge manifold and seal the fittings that were installed in the
service valve gauge ports. Turn power on and begin the run test of the
cabinet.
This completes the installation of a replacement compressor.
Installation, Operation and Service Manual
Appendix
41