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54
15) 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-404A as a mixture with
pressurized air for leak testing.
16) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled
models, see the nameplate for the required refrigerant charge. For remote models, see
the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or
reclaimed refrigerant which meets AHRI Standard 700 (latest edition) be used.
17) Replace the removed parts in the reverse order of which they were removed.
Note: Be sure to use new seal bolts. See "Seal Bolt Removal and Installation
Instructions" earlier in this section.
18) Replace the top and side panels in their correct positions.
19) Move the control switch to the "ICE" position.
20) Move the power switch to the "ON" position, then turn on the power supply.
21) Replace the front panel in its correct position.
6. Removal and Replacement of Mechanical Seal and Lower Housing
6a. Mechanical Seal
1) Drain the water from the evaporator.
a) Remove the front panel, then move the power switch to the "OFF" position.
b) Move the control switch to the "DRAIN" position.
c) Move the power switch to the "ON" position and allow the water to drain from the
evaporator.
d) Move the power switch to the "OFF" position, then turn off the power supply.
2) Remove the top and side panels.
3) Remove the strap connecting the spout to the chute assembly, then remove the spout.
4) Remove the extruding head seal bolts. Using the cutter, lift out the auger assembly.
5) The mechanical seal consists of two parts. One moves along with the auger, and the
other is xed on the lower housing. If the contact surfaces of these two parts are worn,
cracked, or scratched, the mechanical seal may cause water leaks and should be
replaced.
6) Remove the socket head cap screws and split lock washers securing the evaporator to
the lower bearing housing.
7) Raise the evaporator up to access the lower housing.
8) Remove the O-ring and mechanical seal from the housing. If only replacing the
mechanical seal, proceed to step 11.
NOTICE
To help prevent water leaks, be careful not to damage the surfaces of the O-ring or
mechanical seal.
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