Removal And Replacement Of Hot Gas Valve; And/Or Line Valve - Hoshizaki KM-280MAF-E Service Manual

6. REMOVAL AND REPLACEMENT OF HOT GAS VALVE

AND/OR LINE VALVE

Always use a copper tube of the same diameter and length when replacing
the hot gas lines; otherwise the performance may be reduced.
Always install a new Drier every time the sealed refrigeration system is
opened. Do not replace the Drier until after all other repairs or replace-
ments have been made.
1) Turn off the power supply. Unplug the icemaker.
2) Remove the panels.
3) Recover the refrigerant and store it in an approved container. (See "1. [a] REFRIG-
ERANT RECOVERY".)
4) Remove the screw and the Solenoid Coil.
5) Disconnect the valve using brazing equipment.
6) Install the new valve and the new Drier with nitrogen gas flowing at a pressure of
0.2 - 0.3 BAR.
Always protect the valve body by using a damp cloth to prevent the valve
from overheating. Do not braze with the valve body exceeding 250°F
(121°C).
7) Check for leaks using nitrogen gas at 10 BAR and soap bubbles.
8) Evacuate the system, and charge it with refrigerant. See the Nameplate for the
required refrigerant charge. (See "1. [b] EVACUATION AND RECHARGE".)
9) Cut the leads of the Solenoid allowing enough lead length to reconnect using closed
end connectors.
10) Connect the new Solenoid leads.
11) Attach the Solenoid to the valve body, and secure it with a screw.
IMPORTANT
IMPORTANT
WARNING
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