Condensing Unit; Removal And Replacement Of Compressor - Hoshizaki KMS-1230MLH Service Manual

B. Condensing Unit

1. Removal and Replacement of Compressor

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. Install the new drier with the arrow on the drier in the direction of
the refrigerant flow.
Note: When replacing a compressor with a defective winding, be sure to install the
new start capacitor and start relay supplied with the replacement compressor.
Due to the ability of the POE oil in the compressor to absorb moisture quickly,
the compressor must not be opened more than 15 minutes for replacement or
service. Do not mix lubricants of different compressors even if both are charged
with R-404A, except when they use the same lubricant.
1) Turn off the power supply.
) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the terminal cover on the compressor and disconnect the compressor wiring.
5) Remove the hold-down bolts, washers and rubber grommets.
6) Remove the discharge and suction pipes.
7) Remove the compressor. Unpack the new compressor package.
8) Attach the rubber grommets of the prior compressor.
9) Place the compressor in position and secure it using the bolts and washers.
10) Remove the drier, then place the new drier in position (located in the icemaker). Install
the new drier with the arrow on the drier in the direction of the refrigerant flow.
11) Remove the plugs from the suction, discharge and process pipes.
1) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
13) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.
14) Evacuate the system, and charge it with refrigerant. See the nameplate on the
condensing unit for the required refrigerant charge.
15) Connect the terminals and replace the terminal cover in its correct position.
16) Replace the panels in their correct positions.
17) Turn on the power supply.
IMPORTANT
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