Hoshizaki rh1-aac Manual Suplementario

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

after the equipment is serviced.

. The Polyol Ester (POE) oils used in R-134a and 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.

Do not use R-134a or R-404A as a mixture with pressurized air for leak 
testing. Refrigerant leaks can be detected by charging the unit with a trace 
of refrigerant, raising the pressure with nitrogen and using an electronic leak 
detector.

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

1. Refrigerants R-134a and R-404A themselves are not flammable at 

atmospheric pressure and temperatures up to 1°F (100°C) for R-134a and  
176°F (80°C) for R-404A. 

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

However, when exposed to high temperatures (open flames) R-134a and 
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.
5. Do not use R-134a or R-404A as a mixture with pressurized air for leak 

testing. Refrigerant leaks can be detected by charging the unit with a trace 
of refrigerant, raising the pressure with nitrogen and using an electronic leak 
detector.