[C] Evacuation And Recharge - Hoshizaki IM-45WNE Service Manual

[c] EVACUATION AND RECHARGE

IM-21, 30, 45, 65, 100 (R134a)
1) Attach a charging hose of a gauge manifold to a vacuum pump and the low-side
access valve.
2) Open the low-side valve on the gauge manifold, and turn on the vacuum pump.
3) Allow the vacuum pump to pull down to a 760 mmHg vacuum. Evacuating period
depends on the pump capacity.
4) Close the low-side valve on the gauge manifold.
5) Disconnect the vacuum pump, and attach a refrigerant charging cylinder to
accurately weigh in the liquid charge. Remember to purge any air from the charging
hose. See the nameplate for the required refrigerant charge.
6) Open the low-side valve on the gauge manifold and the valve on the charging
cylinder.
7) When no more refrigerant is drawn in, turn on the icemaker. When the required
amount of refrigerant has been charged, close the valve on the charging cylinder
and turn off the icemaker.
8) Close the low-side valve on the gauge manifold.
9) Disconnect the charging hose from the access valve. Always cap the access valve
to prevent a refrigerant leak.
10) Always thoroughly leak test all joints and valve caps.
11) Avoid charging large quantities of liquid into the low side in case of damage to the
compressor.
IM-130, 240 (R404A)
1) Attach charging hoses of a gauge manifold to a vacuum pump and the low-side and
high-side access valves.
2) Open the low-side and high-side valves on the gauge manifold, and turn on the
vacuum pump.
3) Allow the vacuum pump to pull down to a 760 mmHg vacuum. Evacuating period
depends on the pump capacity.
4) Close the low-side and high-side valves on the gauge manifold.
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