Scotsman NME1250R Service Manual page 6

NME1250R
FOR THE INSTALLER
COUPLING INSTRUCTIONS
////////////////////////////////CAUTION//////////////////////////////////
The couplings on the sets of precharged lines are
self sealing when installed properly. Carefully
follow the instructions:
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1. Remove the protector caps and plugs. Wipe the
seats and threaded surfaces with a clean cloth to
be certain that no foreign matter remains on them.
2. Lubricate the inside of the couplings, especially
the O-Rings with refrigerant oil.
3. Connect the couplings to the fittings:
The 3/8 inch liquid line (schrader valve end) to
the remote condenser fitting marked "liquid line".
Connect the other end of the liquid line to the
icemaker fitting marked "liquid line."
Connect the 1/2 inch discharge line (schrader
valve end) to the remote condenser fitting
marked "discharge line".
Connect the other end of the liquid line to the
icemaker fitting marked "liquid line".
4. Begin tightening the couplings together by
hand, then using two wrenches (it is important that
ONLY the nut on the precharged lines be turned,
the other parts of the couplings must NOT be
allowed to turn or the process will tear out the
diaphragms and they will be loose in the
refrigeration system) tighten the coupling until it
bottoms out or a definite increase in resistance is
felt.
SCHRADER VALVE
TO REMOTE
CONDENSER
NO SHRADER
VALVE
TO ICEMAKER
June 1994
Page 6
5. Using a marker or pen, mark a line lengthwise
from the coupling union nut to the bulkhead. Then
tighten the coupling and additional 1/4 turn. As the
nut turns, the line will show when 1/4 turn is made.
6. After all connections are made, and after the
king valve has been opened, check the couplings
for leaks.
Note: The system charge is contained in the
machine's receiver. Holding charges of the same
refrigerant are present in the remote condenser
and pre-charged line sets.
3/8" LIQUID LINE
1/2" DISCHARGE LINE
SERVICE PORTS
REMOTE
CONDENSER