Chapter 6: Troubleshooting
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36
Original instructions
The next test will allow you to determine if the vacuum leak is in the Stoppering
Tray Dryer or in the Console Freeze Dryer.
1.
Remove the coupling and spacer connecting the Tray Dryer to the Freeze
Dryer.
2.
Insert a #8 stopper into the rear port.
3.
Start the vacuum pump and observe the vacuum indication. If the vacuum
indication is good, then the problem is in the Tray Dryer and you should
proceed to Section IV. If the vacuum is insufficient then the leak is the
Freeze Dryer. All easily accessible connection should be checked first for
leaks. The figure below points out more difficult areas to check for leaks.
4.
If a leak is observed around the bulkhead fittings (where the legs of the
collector coil pass through the bottom of the collector chamber), access the
bottom of the chamber and remove the insulation. Tighten the appropriate
fitting by placing a wrench on the fitting inside the chamber and use a
second wrench to turn the nut on the bottom of the chamber. Be careful
not to damage the evaporator coils or the brazed joints to the refrigeration
system. Once the fitting is tightened, perform the test again. If a leak is
Insert #8 stopper(1429900)
into rear port
Remove coupling
and spacer
COLLECTOR CHAMBER
AREAS FOR
POTENTIAL LEAKS
Содержание FreeZone 794801 Series
Страница 1: ...Original instructions Models 794801 Series...