Hoshizaki IM-240DME Service Manual page 81

4. EXPANSION VALVE 4. EXPANSION VALVE
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) Remove the Expansion Valve using brazing equipment. Protect the Evaporator and pipes 4) Remove the Expansion Valve using brazing equipment. Protect the Evaporator and pipes
from excessive heat with damp cloths or similar. from excessive heat with damp cloths or similar.
5) Remove the Expansion Valve Sensor (Bulb). 5) Remove the Expansion Valve Sensor (Bulb).
6) Remove the Drier using brazing equipment. 6) Remove the Drier using brazing equipment.
7) Braze in the new Expansion Valve. Protect the body of the valve from excessive heat, and 7) Braze in the new Expansion Valve. Protect the body of the valve from excessive heat, and
use nitrogen at a pressure of 0.2 - 0.3 bar when brazing. use nitrogen at a pressure of 0.2 - 0.3 bar when brazing.
8) Braze or solder the new Drier (See "3. DRIER"). 8) Braze or solder 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 10) Evacuate the system and charge it with
refrigerant (See "1. [c] EVACUATION refrigerant (See "1. [c] EVACUATION
AND RECHARGE"). AND RECHARGE").
11) Attach the Bulb to the suction line in 11) Attach the Bulb to the suction line in
position. Be sure to secure it using a wire position. Be sure to secure it using a wire
or clamp and replace the insulation. or clamp and replace the insulation.
12) Replace the panels in their correct 12) Replace the panels in their correct
positions. positions.
13) Plug in the icemaker or connect the power 13) Plug in the icemaker or connect the power
source. source.
E1CG4880210 E1CG4880210
IMPORTANT IMPORTANT
Low Side Low Side
Cap Nut Cap Nut
(Adjust Screw inside) (Adjust Screw inside)
77 77
Bulb Bulb
Capillary Tube Capillary Tube
High Side High Side
Fig. 50 Fig. 50