Dectron, Inc. March 2012
Owner’s Manual
DSH/DSV/RSH/DBH/RBH Series Dehumidifier
Closing Manual Valves Service
Data subject to change without notice.
313
Some units may have liquid-line solenoid valves. Should
one of these units need service that requires closing the
receiver-outlet isolation valve, follow these steps:
1. Locate the refrigerant liquid line associated with the
circuit to be serviced.
2. There will be an access valve either in the filter-drier
itself, or in the tube near the filter drier.
3. Set up a refrigerant reclaim machine (by others) on the
access valve. Prepare to reclaim 1/2 pound of
refrigerant.
4. Close the receiver-outlet isolation valve associated with
the circuit to be serviced.
5. Immediately reclaim refrigerant from the liquid line filter-
drier. One-half pound (by weight) or a reduction in
pressure to less than 10 PSIG should be
adequate.
This will allow any remaining liquid refrigerant to expand
without damaging components.
6. If refrigerant is removed from the system, retain it for
return to the unit after service is complete.
DECTRON
Should it be necessary to isolate the remote condenser (if any)
from the unit, follow these steps:
1. Some units may have multiple refrigeration circuits.
Determine which circuit must be isolated.
2. Determine which refrigerant-tubes on the unit connect that
circuit to the remote condenser. These tubes are labelled.
3. Locate the remote-condenser access valves for the tubes of
the circuit in question.
4. Set up a refrigerant-reclaim machine (by others) on the
remote-condenser access valves for the circuit. Prepare to
remove at least one pound of refrigerant, by weight.
5. There will be a manual isolation valve just inside the unit
cabinet behind each tube. Close the two valves associated
with the circuit.
6. Immediately reclaim one pound of refrigerant (by weight).
This will provide enough volume for the remaining
refrigerant to expand without damaging components.
7. Retain the reclaimed refrigerant for return to the unit after
the service is complete.
Horizontal Unit
Vertical Unit
Units with the Air-Cooled Air Conditioning Option Only
Units with Liquid-line Solenoid Valves
liquid-line
solenoid
valve
access valve
filter-drier
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