V. Removal and Replacement of Components
IMPORTANT
Ensure all components, fasteners and thumbscrews are securely in place after the equipment is serviced.
IMPORTANT
1.The Polyol Ester (POE) oils used in
2.Always install a new drier every time the sealed refrigeration system is opened.
3.Do not leave the system open for longer than 15 minutes when replacing or servicing parts.
A.Service for Refrigerant Lines
1. Refrigerant Recovery
The icemaker unit is provided with refrigerant access valves. Using proper refrigerant practices recover the refrigerant from the access valves and store it in an approved container. Do not discharge the refrigerant into the atmosphere.
2.Evacuation and Recharge [R-404A]
1)Attach service manifold hoses and a vacuum pump to the system. Be sure to connect charging hoses to both
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. Never allow the oil in the vacuum pump to flow backward.
3)Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends on pump capacity.
4)Close the
5)Disconnect the vacuum pump, and attach a refrigerant service cylinder to the high- side line. Remember to loosen the connection, and purge the air from the hose. See the nameplate for the required refrigerant charge. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No.
6)A liquid charge is recommended for charging an
7)Allow the system to charge with liquid until the proper charge weight is met.
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