Hoshizaki KM-1301SRJZ/3 Instruction Manual page 31

5) Remove the Schrader valve cores from the remote condenser unit service valve access
ports.
6) Braze the line set copper tubes to the remote condenser unit liquid and discharge line
service valves.
7) Allow the service valves to cool, then replace the Schrader valve cores. Attach the
gauge manifold hoses.
8) 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 R-404A as a mixture with pressurized air for leak testing.
9) After checking the line set for leaks, vent the nitrogen charge from the line set.
10) Evacuate the line set. Allow the vacuum pump to pull down to a 29.9" Hg vacuum.
Evacuating period depends on pump capacity.
11) After evacuation, charge each line set tube with R-404A vapor to a pressure of 15 to 30
PSIG.
12) Close both gauge manifold valves.
13) If the line set exceeds 66' (20 m), see "II.G.4. Line Set Size and Refrigerant Charge" for
proper charging of the appliance. If not, continue to step 14.
14) Open the icemaker service valves first, then open the remote condenser unit service
valves.
15) Disconnect the gauge manifold hoses.
16) Replace all service valve caps and tighten.
17) Insulate all exposed tubing and fittings.
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