Line Set Installation - Hoshizaki F-1002MRJZ Instruction Manual

2. Line Set Installation

• Do not use silver alloy or copper alloy containing arsenic.
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the line set tubing through the service valve access ports (if using
an electronic leak detector), and then raise the pressure using nitrogen gas
(140 PSIG). Do not use refrigerant as a mixture with pressurized air for leak
testing.
• Do not open any service valve until the line set installation is complete and leak
tested.
• Ensure that there are no traps and no kinks in the line set.
• Do not coil extra line set.
1) Route the proper size copper tube liquid line and copper tube suction line (see "II.H.1
Line Set Size and Rack System Requirements" for details) from the rack system to the
icemaker. Leave a service loop behind the icemaker to allow the icemaker to be pulled
out for service. See Fig. 14. Note: The service loop is not considered an oil trap.
2) Remove any extra line set length, then insulate the two copper tubes separately.
3) Remove the Schrader valves from the icemaker service valves. Next, remove the
straight copper tube from the icemaker accessory bag and place it in the icemaker
liquid line service valve with the smaller end of the straight copper tube facing outward.
Note: The smaller diameter must be facing outward. Next, place the liquid line copper
tube into the straight copper tube.
4) Braze the liquid line copper tube to the straight copper tube and the straight copper
tube to the icemaker liquid line service valve.
• Before brazing, remove the Schrader valve cores from the service valve access
ports.
• When brazing, protect the service valve by using a wet cloth to prevent the service
valve from overheating.
• Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4
PSIG.
5) Braze the icemaker suction line copper tube to the icemaker suction line service valve.
6) If applicable, remove the rack system service valve Schrader valve core. Connect the
rack system end of the line set per the rack system instructions. NOTICE! Do not open
the rack system service valves at this time.
7) Allow the service valves to cool, then replace the Schrader valve cores in the icemaker
service valves and rack system service valves (if applicable). Attach the gauge manifold
hoses.
WARNING
NOTICE
NOTICE
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