Scotsman Prodigy Series - Manual (Page 12)

January 2015 Page 12
General Installation - Remote
Precharged Line Routing
Do not connect the precharged tubing until all routing and forming of the tubing is complete.
See the Coupling Instructions for final connections.
1. Each set of pre-charged tubing lines contains a 3/8” diameter liquid line, and a 1/2” diameter discharge line.
Note: The openings in the building ceiling or wall, listed in the next step, are the minimum sizes
recommended for passing the refrigerant lines through.
2. Have the roofing contractor cut a minimum hole for the refrigerant lines of 2”. Check local codes, a separate
hole may be required for the electrical power supply to the condenser.
Caution: Do NOT kink the refrigerant tubing while routing it.
3. Route the refrigerant tubes thru the roof opening. Follow straight line routing whenever possible. Excess
tubing may EITHER be coiled up INSIDE the building OR cut out prior to connection to the ice maker and
condenser. If the excess tubing is cut out, after re-brazing the tubing must be evacuated prior to connection to
the ice maker or condenser.
Note brazing requires a nitrogen purge.
If the excess tubing is to be coiled, spiral it horizontally to avoid excess trapping in the lines.
5. Have the roofing contractor seal the holes in the roof per local codes.
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. Lubricate the inside of the couplings, especially the threads and O-rings, with refrigerant oil.
3. Position the fittings on the correct connections on the condenser and ice machine..
Final Connections:
4a. Begin by tightening the couplings together by hand until it is certain that the threads are properly engaged.
4b. Then using two wrenches tighten the coupling until it bottoms out or a definite 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.
4c. Continue tightening the swivel nut until it bottoms out or a very definite increase in resistance is felt (no
threads should be showing).
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.
Do NOT over tighten.
6. After all connections have been made, and after the receiver valve has been opened (open at Initial Start
Up), check the couplings for leaks.