Removal And Replacement Of Components; Service For Refrigerant Lines; Refrigerant Recovery; Brazing - Hoshizaki KMS-1230MLH Service Manual

V. Removal and Replacement of Components
1.Ensure all components, fasteners and thumbscrews are securely in place
after the equipment is serviced.
. The Polyol Ester (POE) oils used in R-404A units can absorb moisture
quickly. Therefore it is important to prevent moisture from entering the system
when replacing or servicing parts.
3. 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.
4. Do not leave the system open for longer than 15 minutes when replacing or
servicing parts.
A. Service for Refrigerant Lines
The condensing unit is provided with two shutoff valves, one on the low-side,
one on the high-side and also with an access valve on the receiver tank. The
icemaker unit is provided with two service valves, one on the low-side and one
on the high-side.
For refrigerant recovery, evacuation and recharge of the system, always use
the access valve on the receiver tank for the high-side and either the shutoff
valve of the condensing unit or the service valve of the icemaker unit for the
low-side line.

1. Refrigerant Recovery

Using proper refrigerant practices recover the refrigerant and store it in an approved
container. Do not discharge the refrigerant into the atmosphere.

2. Brazing.

1. Refrigerant R-404A itself is not flammable at atmospheric pressure and
temperatures up to 176°F (80°C).
. Refrigerant R-404A itself is not explosive or poisonous. However, when
exposed to high temperatures (open flames) R-404A can be decomposed to
form hydrofluoric acid and carbonyl fluoride both of which are hazardous.
3. Always recover the refrigerant and store it in an approved container. Do not
discharge the refrigerant into the atmosphere.
4. Do not use silver alloy or copper alloy containing arsenic.
IMPORTANT
IMPORTANT
WARNING
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