Scotsman NM952R Service Manual page 6

NM952R
FOR THE INSTALLER: Precharged Lines
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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Initial Connections:
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.
The 1/2 inch discharge line (schrader valve
end) goes to the remote condenser fitting
marked "discharge line".
The 3/8 inch liquid line (schrader valve end)
goes to the remote condenser fitting marked
"liquid line".
The 1/2 inch discharge line goes to the ice
maker fitting marked "discharge line".
The 3/8 inch liquid line goes to the ice maker
fitting marked "liquid line".
Final Connections:
3. 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
4. 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.
5. After all connections are made, and after the
king valve has been opened, check the couplings
for leaks.
NO SCHRADER
VALVE
TO ICE MAKER
November 1992
Page 6
SERVICE PORTS
REMOTE CONDENSER
3/8" LIQUID LINE
1/2" DISCHARGE
LINE