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N0422, F0522, N0622, F0822, N0922, F1222, N1322, F1522
D Series Air, Water or Remote User Manual
December 2014
Page 13
Coupling Instructions - Remote Only
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 Certied
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. Lubricate the inside of the couplings, especially
the O-rings, with refrigerant oil. Oil packets are
supplied with Scotsman line sets.
3. Position the ttings on the correct connections on
the condenser and ice machine.
Final Connections:
4. Tighten the couplings together by hand until it is
certain that the threads are properly engaged.
5. Use two wrenches tighten the coupling until it
bottoms out or a denite increase in resistance is
felt. It is important that ONLY the nut on the pre-
charged tube be turned, or the diaphragms will
be torn out by the piercing knives and they will be
loose in the refrigeration system.
Note: As the couplings are tightened, the diaphragms
in the quick connect couplings will begin to be
pierced. As that happens, there will be some
resistance to tightening the swivel nut.
6. Continue tightening the swivel nut until it bottoms
out or a very denite increase in resistance is felt
(no threads should be showing).
Critical Step!!!!!
7. 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. Do NOT over tighten.
8. After all connections have been made, and after
the receiver outlet valve has been opened (do not
open yet), check the couplings for leaks.
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