Line Set Installation - Hoshizaki F-1501MRJZ 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. 12. 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.
4) Braze the line set copper tubes to the icemaker liquid and suction line service valves.
• 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) 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.
6) 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.
7) 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).
WARNING! Do not use refrigerant as a mixture with pressurized air for leak
testing.
WARNING
NOTICE
NOTICE
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