Scotsman NME1854R - Manual (Page 7)

Note: The couplings on the sets of precharged
lines must be installed properly to prevent leaking.
Carefully follow the instructions:
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.
3. Position the fittings on the correct connections
on the condenser and ice machine.
· The ½ 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 ½ inch discharge line goes to the Ice
Machine fitting marked “discharge line.”
· The 3
8
inch liquid line goes to the Ice Machine
fitting marked “liquid line.”
Final Connections:
4a. Begin by tightening the couplings together by
hand. Continue to turn the swivel nuts by hand until
is is certain that the threads are properly engaged.
4b. Using two wrenches, one to rotate the swivel
nut and one to hold the tubing, tighten each
coupling.
It is CRITICAL that ONLY the NUT on the
pre-charged tube be turned or the diaphragms will
be torn loose by the piercing knives and be loose
in the refrigeration system causing severe
operational problems.
Note: As the coupling is tightened, the diaphragms
in the quick connect couplings will begin to be
pierced. As that happens, there will be increased
resistance to tightening the swivel nut.
4c. Continue tightening the swivel nut until it
bottoms out or a very definite increase in
resistance is felt (no threads should be showing).
Do NOT overtighten.
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 (do not open at this
time), check the couplings for leaks.
NME1854R & FME2404R
January 2000
Page 7
FOR THE INSTALLER: Precharged Lines
SCHRADER
NO SCHRADER
VALVE
TO REMOTE
CONDENSER
TO Ice Machine
Clean and Lubricate Couplings
Tighten Swivel Nut
Rotate Swivel Nut ¼ Turn More