icetro ISIV-273SHC, User Manual

Page: 73 / 124

73
Service for Refrigerant Lines
Removal and replacement of freezing parts
1. This unit should be diagnosedd and repaired only by qualified service personnel
to reduce the risk of death, electric shock, serious injury, or fire.
2. Move the ELCB switch to the "OFF" position before servicing
3. CHOKING Hazard : Ensure all components, fasteners, and screws are securely
in place after the unit is serviced.
4. Make sure hopper and cylinder in the ice-cream maker are clean after the unit is
serviced.
A. Service for Refrigerant Lines
1. Repairs requiring the refrigeration circuit to be opened must be performed by
Properly tarined service personnel.
2. Always recover the refrigerant and store it in an approved container.
Do no discharge the refrigerant into the atmosphere.
3. 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 nitogen gas (140PSIG).
DO NOT use R-404A as a mixture with pressurized air for leak testing
1. The Polyol Ester (POE) oils used in R-404A units can sbsorb moisture quickly.
Therefore it is important to prevent moisture from entering the system when replacing
or servicing parts.
2. Always install a new drier every time the ealed refrigeration system is opend.
3. Do not replace the dried 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 flow
4. When brazing, protect the drier and 4-way valve by using a wet cloth to provent the drier
and 4-way valve from overheating, Do not allow the drier to exceed 250
℉
(121
℃
)
5. Do not leave the system open for longer than 15 minutes when replacing or
servicing parts.
CAUTION
CAUTION
WARING