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18) Check for water leaks.
19) Replace the panels in their correct positions.
20) Turn on the power supply.
I. Adjustment of Water Regulating Valve - Water-Cooled Model
The water regulating valve (also called "water regulator") is factory-adjusted. No adjustment
is required under normal use. Adjust the water regulator, if necessary, using the following
procedures.
1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure
gauge to the high-side line of the system.
2) Five minutes after a freeze cycle starts,
conrm that the thermometer reads 104°F
to 115°F (40°C to 46°C). If it does not,
rotate the adjustment screw by using a at
blade screwdriver until the temperature is
in the proper range. See Fig. 3. Next, check
that the reference pressure is in the range
indicated in the Head Pressure table in
the Performance Data section. See "III.C.
Performance Data." If it is not in the proper
range, verify the refrigerant charge.
3) Check that the condenser drain temperature is stable.
J. Removal and Replacement of Headmaster (Condensing Pressure
Regulator - C.P.R.) - Remote Air-Cooled Model
CAUTION
1. Always install a new drier every time the sealed refrigeration system is
opened.
2. 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 ow.
3. When brazing, protect the headmaster and drier by using wet cloths to
prevent the headmaster and drier from overheating. Do not allow the drier to
exceed 250°F (121°C).
1) Turn off the power supply.
2) Remove the panels from the remote condenser unit.
3) Recover the refrigerant and store it in an approved container.
4) Before heating, break off the stub on the dome to release the dome charge.
5) Disconnect the headmaster.
6) Place the new headmaster in position.
7) Remove the drier, then place the new drier in position.
Fig. 3
Adjustment
Screw
CW – Lower
CCW – Higher
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