Hoshizaki IM-100, Руководство по обслуживанию

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101
Fig. 25
Cap
Access Valve
Depressed
OPEN
[c] EVACUATION AND RECHARGE
1) Attach Charging Hoses, a Service Manifold and a Vacuum Pump to the system. If possible,
use Quick Release Connectors onto the Access Valves (especially on the high side).
2) 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 Service 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 High-side Valve on the Gauge Manifold, and accurately measure in the liquid
charge. Close the valve on the Charging Cylinder before closing the High-side Manifold
Valve. Any remaining liquid in the line can be charged into the low side.
Note: Always charge in the liquid stage, as many refrigerants are blends and vapour
charging will affect the blend consistency (eg. R404A).
7) Turn on the icemaker. Release the High-side Access Connector, and allow pressure in
the charging line to slowly enter the low side of the system. Cap off the High-side Access
Valve. When pressure reduces on the low side, disconnect the low side charging line
and cap off the Access Valve.
8) Always cap the Access Valves to prevent a refrigerant leak.
9) Always thoroughly leak test all joints and valve caps.
10) Avoid charging large quantities of liquid into the low side in case of damage to the
Compressor.