Brazing; Compressor - Hoshizaki KMD-201AWA Service Manual

2. BRAZING

1. Refrigerant R404A itself is not explosive or poisonous. However, when
exposed to high temperatures (open flames), R404A can be decomposed to
form hydrofluoric acid and carbonyl fluoride both of which are hazardous.
2. Always recover the refrigerant and store it in a proper container. Do not
discharge the refrigerant into the atmosphere.
3. Do not use silver alloy or copper alloy containing arsenic.
4. Do not use R404A as mixture with pressurized air for leak testing.
Refrigerant leaks can be detected by charging the unit with a little refrigerant,
raising the pressure with nitrogen and using an electronic leak detector.
Note: All brazing connections inside the bin are clear coated. Sandpaper the brazing
connections before unbrazing the components. Use a good abrasive cloth to remove
the coating.

3. COMPRESSOR

The compressor terminal cover must be refitted in its correct position. Otherwise,
operation under high temperature and high humidity conditions may cause
electric shock, fire, or corrosion to shorten the service life.
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.
1) Turn off the power supply.
2) Remove the panels and water tank. See "V. 14. WATER TANK."
3) Recover the refrigerant and store it in an approved container.
DANGER
WARNING
IMPORTANT
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