MAINTENANCE WITH Q&A
Page 5-14
PFC REFRIGERANTS
(Only applicable to chambers using refrigerant R-508B)
This equipment contains the refrigerant SUVA
®
95 (R-508B) in the low side system. SUVA
®
95 is chlorine-free
and meets all EPA regulations for ozone-safe refrigerants. It has also been established that SUVA
®
95, a PFC,
has a long atmospheric lifetime and therefore, emissions of this refrigerant should be minimized. Cincinnati
Sub-Zero Products, LLC recommends that SUVA
®
95 should never be discharged to the atmosphere, and that
servicing of your equipment should be performed by those persons certifi ed to work on this type of refrigerant
system.
Specifi cally, we recommend the following maintenance instructions:
1. Implement practices to recover, reclaim, recycle, or destroy the PFC refrigerants during equipment
servicing and upon the retirement of the equipment.
2. Reduce or contain to a minimum the emission of PFC refrigerant during normal operation,
maintenance, manufacture or installation of systems; and ensure that the annual leakage from systems
containing PFC refrigerants will not exceed 25% of the system charge in the previous year. On July 1,
1997, the maximum allowable annual leakage will be reduced to 20%.
If you have any questions about refrigerants, please call Cincinnati Sub Zero and speak with our Manager of
Application Engineering.
RESETTING A CIRCUIT BREAKER
If the unit fails to operate properly or fan or compressors do not operate, a circuit breaker may have opened due
to an overload condition. To reset the breaker, disconnect main power from the unit and access the electrical
sub-panel by removing the cover on the front of the unit. The circuit breakers are labeled as shown on the
electrical schematic. Switch the circuit breaker to the off position and then turn it back on. The cause of the trip
should be investigated so further trips are avoided.
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