Line Set Routing And Brazing - Scotsman Prodigy Plus A Series Service Manual

NH0422, NS0422, FS0522, NH0622, NS0622, FS0822, NH0922, NS0922, FS1222, NH1322, NS1322, FS1522
Air, Water or Remote Service Manual

Line Set Routing and Brazing

Do not connect the refrigerant tubing until all
routing and forming of the tubing is complete.
Final connections requires brazing, steps must
be performed by an EPA certified type II or higher
technician.
The Lineset of tubing 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.
Have the roofing contractor cut a minimum hole for
the refrigerant lines of 1 3/4". 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.
At Condenser:
1. Remove protective plugs from both connections
and vent the nitrogen from the condenser.
2. Remove the tubing access bracket to allow more
room for brazing.
3. Route the lineset tubes to there connection.
4. Clean tubing ends and position into stubs.
Note: Be sure tube and stubs are round, dress with
swage tool if needed.
At Head:
1. Remove the tubing access bracket to allow
more room for brazing.
2. Confirm connection ball valves are fully
closed.
3. Remove protective plugs from both connec-
tions.
4. Remove caps from access valve connec-
tions.
5. Remove cores from access valves.
6. Connect refrigeration hoses to access
valves.
7. Connect dry nitrogen source to liquid line
connection.
8. Shorten tubing to correct length, clean ends
and insert them into valve stubs.
Note: Be sure tube and stubs are round, dress with
swage tool if needed.
9. Add heat sink material to ball valve body.
10. Open nitrogen and flow 1 psi nitrogen into
liquid line tube and braze the liquid line and
suction line tubes to the valve stubs.
11. With nitrogen flowing braze the liquid and
suction line connections.
At Condenser:
1. Braze the liquid and suction line connections.
At Head:
1. Remove nitrogen source.
2. Return valve cores to access valves.
3. Connect vacuum pump to both access
valves and evacuate the tubing and head to
at least a 300 micron level.
4. Remove vacuum pump and add R-404A to
all three tubes to provide a positive pressure.
5. Leak check the all braze connections and
repair any leaks.
6. Open both valves to full open.
Note: The full refrigerant charge is contained in the
receiver of the ice machine.
July 2020
Page 16