Hoshizaki HWR68A(-D) Manuel D’Utilisation

46

1. Ensure all components, fasteners, and thumbscrews are securely in place 

after the equipment is serviced.

. The Polyol Ester (POE) oils used in all 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.

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 nitrogen gas (140 PSIG). DO NOT use R-404A or R-134a 
as a mixture with pressurized air for leak testing.

The undercounter unit is provided with a refrigerant access valve. Using proper 
refrigerant practices, recover the refrigerant from the access valve and store it in an 
approved container. Do not discharge the refrigerant into the atmosphere.

1. R-404A and R-134a are not flammable at atmospheric pressure and 

temperatures up to 176°F (80°C).

. R-404A and R-134a themselves are not explosive or poisonous. However, 

when exposed to high temperatures (open flames), these refrigerants 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.
5. 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 nitrogen gas (140 PSIG). DO NOT use R-404A 
or R-134a as a mixture with pressurized air for leak testing.