Hot Gas Valve - Hoshizaki DIM-40DE-HC Service Manual

7. HOT GAS VALVE

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 made.
1) Unplug the ice dispenser or disconnect the power source.
2) Remove the rear mesh panel.
3) Recover the refrigerant and store it in a proper container, if required by an applicable
law (See "2. [b] REFRIGERANT RECOVERY").
4) Disconnect the hot gas valve leads.
5) Remove the screw and the solenoid coil.
6) Remove the valve and drier using brazing equipment.
?) Braze the new hot gas valve with nitrogen gas lowing 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 120°C.
8) Install the new drier (See "4. DRIER").
9) Check for leaks using nitrogen gas (10 bar) and soap bubbles.
10) Evacuate the system and charge it with refrigerant (See "2. [c] EVACUATION AND
RECHARGE").
11) Attach the solenoid coil to the valve body and secure it with the screw.
12) Connect the leads.
13) Replace the panels in their correct positions.
14) Plug in the ice dispenser or connect the power source.
IMPORTANT
WARNING
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