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IMPORTANT
The vacuum level and vacuum pump may be the same as those for current
refrigerants. However, the rubber hose and gauge manifold to be used for
evacuation and refrigerant charge should be exclusively for POE oils.
2) Turn on the vacuum pump. Open the gauge manifold valves. Never allow the oil in
the vacuum pump to À ow backwards.
3) Allow the vacuum pump to pull down to a 29.9” Hg vacuum. Evacuating period
depends on pump capacity.
4) Close the high-side valve on the gauge manifold.
5) Disconnect the gauge manifold hose from the vacuum pump and attach it to
a refrigerant service cylinder. Remember to loosen the connection and purge
the air from the hose. For the required refrigerant charge, see the nameplate.
Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets
AHRI Standard 700 (latest edition) be used.
6) A liquid charge is required when charging an R-134a system. Place the service
cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert
the service cylinder, then place it on the scales. Open the high-side valve on the
gauge manifold.
7) Allow the system to charge with liquid until the proper charge weight is met.
8) Close the high-side valve on the gauge manifold, then close the refrigerant access
valve (if applicable). Disconnect the gauge manifold hose.
9) Cap the access valve to prevent a possible leak.
B. Component Service Information
NOTICE
When replacing a component listed below, see the notes to help ensure proper
operation.
Component Notes
Compressor Install a new start capacitor and start relay. (If applicable)
Thermostatic
Expansion Valve
(KM-160 only)
• Attach the thermostatic expansion valve bulb to the suction line in the same location
as the previous bulb.
• The bulb should be between the 10 and 2 o'clock positions on the tube.
• Secure the bulb with the clamp and holder, then insulate it.
Hot Gas Valve • Replace the strainer if applicable.
• Use copper tube of the same diameter and length when replacing valve lines.
Pump Motor Install a new capacitor.
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