SAFETY DEVICES & SERVICE
REFRIGERANT
This piece of equipment uses a R-290 Refrigeration system.
This equipment has been clearly marked on the serial tag the
type of refrigerant that is being used. There is also a warning
labels stating that the unit contains R-290 refrigerant.
No smoking or open flames when servicing this equipment. If
needed, use a CO2 or dry=power type fire extinguisher
Only authorized service technician, certified in R-290 system
should service this equipment.
MANIFOLD SET
A R-134A manifold set can be used for servicing this equipment.
REFRIGERANT RECOVERY
Follow all national and local regulations for R-290 refrigerant
recovery.
LEAKING CHECKING AND REPAIR
Leak check an R-290 system the same way you would an R-
134a or R-404A system with the following exceptions.
1.
Do not use a Halid leak detector on a R-290 system.
2.
Electronic leak detector must be designated specifically
for combustible gas.
Use of a bubble solution or an ultrasonic leak detector are ac-
ceptable.
When repairing a leak, it is recommended using oxygen free dry
nitrogen with a trace gas not exceeding 200PSI.
When accessing an R-290 system, proper charge is to be
weighed into the system and the system is to be leak checked
afterwards.
The R-290 equipment must have red process tubes and other
devices through which the refrigerant is serviced, such as any
service port. This color marking must remain on the equipment.
If marking is removed, it must be replace and extend at least
2.5 centimeters (1”) from the compressor.
CHARGING
Follow the charge amount specified on the data tag. It is recom-
mended to use the shortest hoses possible to prevent under-
charging.
C A U T I O N
Component parts shall be replaced with like
components. Service work shall be done by
factory authorized service personnel, so as to
minimize the risk of possible ignition due to
incorrect parts or improper service.
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• Ensure the system is sealed and leak checked
• Evacuate system to a minimum 500 micron
• Weigh in correct charge
• Leak check the system again
• Bleed the refrigerant from the high side hose to the low
side hose
• Disconnect the hoses
• Remove line taps
D A N G E R
FLAMMABLE
DANGER - Risk of Fire or Explosion. Flammable
Refrigerant Used. Do Not Use Mechanical De-
vices To Defrost Refrigerator. Do Not Puncture
Refrigerant Tubing.
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C A U T I O N
It is highly recommended that a technician
servicing a case with HC refrigerant is aware
of safety considerations and maintenance
procedures on how to safely handle fl ammable
refrigerants.
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