Panasonic MDF-DU502VH, Service Manual

Page: 54 / 78

Procedure 2: Shut the valves VC and VG, then open the valve VL.
Holding the pentane cylinder vertically, slowly open the
VCL and aspirate the pentane into the circuit.
At this time, pull in while watching the guide of the
cylinder and stop the VCL when it reaches the specified
amount (stop position).
Be sure to stop with the pentane remaining in the
cylinder.
Confirm that there is no pentane left in Teflon hose and
shut all valves.
Remove the Teflon hose and return the remaining
pentane to the container.
Note2
：
If the cylinder becomes empty beyond the specified amount, the air will enter the
refrigeration circuit, so be sure to stop with the pentane remaining.
4.7.3 After pentane circuit enclosure, just like high temperature side work, 4. Perform gas charge
work.
Note 1 : Paste the new service pipe label (red tag) again near the original pasting position.
Leave the service valve without removing it.
This operation is PA only. It is unnecessary for other destinations.
Note 2
：
Do not apply excessive force to the welded part of piping (prevention of cracking)
when installing the rear cover after the work is finished.
Confirm operation as final confirmation
Turn on the freezer and check the operation
Valve Operation
open shut
VC
○
VG
○
VL
○ ○
VH
○
VR
○
VCU
○
VCL adjustment
SVL
○
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