40
7) Braze the fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
CAUTION
Always protect the headmaster body by using a damp cloth to prevent it from
overheating. Do not braze with the headmaster body exceeding 250°F (121°C).
8) Remove the drier in the icemaker, then place the new drier in position.
9) Braze the fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
10) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.
11) Evacuate the system and charge it with refrigerant. For the required refrigerant charge,
see the charge label in the machine compartment of the icemaker.
12) Replace the panels in their correct positions.
13) Turn on the power supply.
I. Removal and Replacement of Thermistor
IMPORTANT
1. Fragile, handle very carefully.
2. Always use a recommended sealant (high thermal conductive type), Model
KE4560RTV manufactured by SHINETSU SILICONE, Part Code 60Y000-11,
or Part Code 4A0683-01 or equivalent.
3. Always use a recommended foam insulation (non-absorbent type) or
equivalent.
4. Do not shorten or cut the thermistor leads when installing.
1) Turn off the power supply.
2) Remove the panels.
3) Remove the control box cover.
4) Disconnect the thermistor leads from the
K3 connector on the control board.
5) Remove the plastic cable ties, foam
insulation, thermistor holder and thermistor.
See Fig. 2.
6) Scrape away the old sealant on the
thermistor holder and the suction pipe.
7) Wipe off moisture or condensation on the
suction pipe.
8) Smoothly apply recommended sealant (KE4560RTV, Part Code 60Y000-11 or
4A0683-01) to the thermistor holder concave.
Foam Insulation
Thermistor Holder
Thermistor Lead
Cable Tie
Fig. 2
Summary of Contents for KML-451MAH
Page 21: ...21 2 KML 451MWH water cooled ...
