Справочник Пользователя для Hoshizaki C-100BAF-ADDS
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6) A liquid charge is recommended when charging an R-134a system. Place the service
cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert the
service cylinder, then place it on the scales. Open the high-side valve on the gauge
manifold.
service cylinder, then place it on the scales. Open the high-side valve on the gauge
manifold.
7) Allow the system to charge with liquid until the proper charge weight is met.
8) Close the high-side valve on the gauge manifold, then close the refrigerant access valve
8) Close the high-side valve on the gauge manifold, then close the refrigerant access valve
(if applicable). Disconnect the gauge manifold hose.
9) Cap the access valve to prevent a possible leak.
B. Removal and Replacement of Compressor
CAUTION
1. 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.
been made.
2. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed 250°F (121°C).
Note: Hoshizaki recommends that compressor starting components be replaced at the
same time as the 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.
to absorb moisture quickly, the compressor must not be opened more than 15
minutes for replacement or service.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Remove the upper and lower rear panels, front panel, and louver. See Fig. 1. Remove
the screws securing the control box, then gently move the box out of the way.
3) Install a temporary tap-line valve on the high side, then 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 discharge and suction pipes.
6) Remove the hold-down bolts, washers, and rubber grommets.
7) Remove the compressor.
8) Attach the rubber grommets of the prior compressor to the new compressor.
9) Place the compressor in position and secure it using the bolts and washers.
5) Remove the discharge and suction pipes.
6) Remove the hold-down bolts, washers, and rubber grommets.
7) Remove the compressor.
8) Attach the rubber grommets of the prior compressor to the new compressor.
9) Place the compressor in position and secure it using the bolts and washers.
10) Replace the tap-line valve with a proper, permanent access valve.
11) Remove the drier, then place the new drier in position.
12) Remove the plugs from the suction, discharge, and process pipes.
13) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
14) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
11) Remove the drier, then place the new drier in position.
12) Remove the plugs from the suction, discharge, and process pipes.
13) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
14) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-134a as a mixture with
pressurized air for leak testing.
pressure using nitrogen gas (140 PSIG). DO NOT use R-134a as a mixture with
pressurized air for leak testing.