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Coupling Instructions
The couplings on the ends of the pre-charged line
sets are self-sealing when installed properly.
Follow these instructions carefully.
These steps must be performed by an EPA
Certified Type II or higher technician.
Initial Connections
1. Remove the protector caps and plugs. Wipe the
seats and threaded surfaces with a clean cloth to
remove any possible foreign matter.
2. Thoroughly lubricate the threads, o-rings,
diaphragms and all internal coupling surfaces with
polyolester refrigerant oil.
Clean and Lubricate Couplings
3. Position the fittings on the correct connections
on the condenser and ice machine.
•
The
5
" discharge line (schrader valve end)
8
goes to the remote condenser fitting marked
"discharge line".
•
The
3
" liquid line (schrader valve end) goes
8
to the remote condenser fitting marked
"liquid line".
•
The
5
" discharge line goes to the ice maker
8
fitting marked "discharge line".
•
The
3
" liquid line goes to the ice maker
8
fitting marked "liquid line".
Note: The system charge is contained in the
receiver tank of the ice machine. Only
"holding" charges are present in the
"pre-charged" tubing or the condenser.
Final Connections:
4a. Begin to tighten the couplings together by hand.
Continue to turn the swivel nuts by hand until it is
certain that the threads are properly engaged.
4b. Using two wrenches, one to rotate the swivel
nut and one to hold the tubing in place, tighten
each coupling.
Tighten Swivel Nut
It is CRITICAL that ONLY the NUT on the
pre-charged tube be turned, or the diaphragms
will be torn by the piercing knives and become
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. Use a marker or pen to mark a line on the
coupling nut and unit panel. Then tighten the
coupling nut an additional one-quarter turn. The
line will show the amount that the nut turns.
Rotate Swivel Nut ¼ Turn More
6. After all connections have been made, and after
the liquid line valve has been opened (do not open
yet), check the couplings for leaks.
July 1998
Page 12
CME2006R
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