Hoshizaki KM-40B, Service Manual

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47
3. COMPRESSOR
WARNING
The Compressor Terminal Cover must be refitted in its correct position.
Otherwise, operation under high temperature and high humidity conditions
may cause electric shock, fire, or corrosion to shorten the service life.
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 Louver and Rear Cover.
3) Recover the refrigerant and store it in a proper container, if required by an applicable
law (see “V. 1. [b] REFRIGERANT RECOVERY”).
4) Remove the Terminal Cover on the Compressor, and disconnect Solderless
Terminals.
5) Disconnect the Discharge and Suction Pipes using brazing equipment.
6) Remove the Hold-down Bolts, Washers and Rubber Grommets.
7) Slide and remove the Compressor. Unpack the new Compressor package.
8) Attach the Rubber Grommets of the previous Compressor.
9) Clean the Suction and Discharge Pipes with an abrasive cloth/paper.
10) Place the Compressor in position, and secure it using the Bolts and Washers.
11) Remove Plugs from the Compressor Suction and Discharge Pipes.
12) Braze or solder the Access, Suction and Discharge lines (Do not change this order),
with nitrogen gas flowing at a pressure of 0.2 - 0.3 bar.
13) Install the new Drier (see “V. 4. DRIER”).
14) Check for leaks using nitrogen gas (10 bar) and soap bubbles.
15) Evacuate the system and charge it with refrigerant (see “V. 1. [c] EVACUATION AND
RECHARGE”).