Hoshizaki IM-100, Service Manual

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104
Fig. 26
Bulb
Capillary Tube
Cap Nut
(Adjust Screw inside)
High Side
Low Side
4. EXPANSION VALVE
IMPORTANT
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 icemaker or disconnect the power source.
2) Remove the Top, Front (Upper) and Rear Mesh Panels.
3) Recover the refrigerant and store it in a proper container, if required by an applicable law
(See “1. [b] REFRIGERANT RECOVERY”).
4) Remove the Expansion Valve using brazing equipment. Protect the Evaporator and pipes
from excessive heat with damp cloths or similar.
5) Remove the Expansion Valve Sensor (Bulb).
6) Remove the Drier using brazing equipment.
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.
8) Braze or solder the new Drier (See “3. DRIER”).
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 RECHARGE”).
11) Attach the Bulb to the suction line in
position. Be sure to secure it using a wire
or clamp and replace the insulation.
12) Replace the panels in their correct
positions.
13) Plug in the icemaker or connect the power
source.