Hoshizaki IM-240AME, Service Manual

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E1CG4880210 E1CG4880210
6. HOT GAS VALVE 6. HOT GAS VALVE
IMPORTANT IMPORTANT
Always install a new Drier every time the sealed refrigeration system is opened. Always install a new Drier every time the sealed refrigeration system is opened.
Do not replace the Drier until after all other repair or replacement has been
Do not replace the Drier until after all other repair or replacement has been
made.
made.
1) Unplug the icemaker or disconnect the power source. 1) Unplug the icemaker or disconnect the power source.
2) Remove the Top, Front and Right Side Panels. 2) Remove the Top, Front and Right Side Panels.
3) Recover the refrigerant and store it in a proper container, if required by an applicable law 3) Recover the refrigerant and store it in a proper container, if required by an applicable law
(See “1. [b] REFRIGERANT RECOVERY”). (See “1. [b] REFRIGERANT RECOVERY”).
4) Disconnect the Hot Gas Valve leads. 4) Disconnect the Hot Gas Valve leads.
5) Remove the screw and the Solenoid Coil. 5) Remove the screw and the Solenoid Coil.
6) Remove the valve and Drier using brazing equipment. 6) Remove the valve and Drier using brazing equipment.
7) Braze the new Hot Gas Valve with nitrogen gas flowing at the pressure of 0.2 - 0.3 bar. 7) Braze the new Hot Gas Valve with nitrogen gas flowing at the pressure of 0.2 - 0.3 bar.
WARNING WARNING
Always protect the valve body by using a damp cloth to prevent the valve from Always protect the valve body by using a damp cloth to prevent the valve from
overheating. Do not braze with the valve body exceeding 120°C.
overheating. Do not braze with the valve body exceeding 120°C.
8) Install the new Drier (See “3. DRIER”). 8) Install the new Drier (See “3. DRIER”).
9) Check for leaks using nitrogen gas (10 bar) and soap bubbles. 9) Check for leaks using nitrogen gas (10 bar) and soap bubbles.
10) Evacuate the system and charge it with refrigerant (See “1. [c] EVACUATION AND 10) Evacuate the system and charge it with refrigerant (See “1. [c] EVACUATION AND
RECHARGE”). RECHARGE”).
11) Attach the Solenoid Coil to the valve body, and secure it with the screw. 11) Attach the Solenoid Coil to the valve body, and secure it with the screw.
12) Connect the leads. 12) Connect the leads.
13) Replace the panels in their correct positions. 13) Replace the panels in their correct positions.
14) Plug in the icemaker or connect the power source. 14) Plug in the icemaker or connect the power source.