User Manual for PF Freezers Beverage-Air
Rev. 12/20Beverage-Air24
FOR THE SERVICE TECH - R290
Refrigeration service should only be attempted by a trained trade professional certied to work on R290 systems.
Here are some critical service items.
This list does not qualify anyone to service the unit. It is a
reminder and checklist for the service tech. Keep these in
mind for R290 service:
• Wire nuts are NOT to be used when changing an
electrical part.
• The switches in this product are sealed, only exact
replacements may be used.
• The process tubes are to be used for service access.
• Cut out (with tubing cutter) refrigeration components
that are to be replaced. Do NOT un-braze.
• Because R290 can be vented into the air during
service, the venting MUST be in an area free from
ame or spark. It must also be in a well ventilated
area, with a nearby open window or door.
• A sign noting service of a system containing propane
must be attached to the unit during refrigeration
service.
• A combustible gas leak detector must be used to
inform anyone in the area when propane is present in
the air.
Other Information:
Evacuation: It is critical that a refrigeration system be
leak free and internally dry. A thorough evacuation with
a good vacuum pump with a micron gauge attached is the
only way to ensure that the system is dry and ready for a
charge of refrigerant.
Charging: The system is critically charged and the proper
type and amount MUST be weighed in.
Overcharge symptoms: Unit will cool properly but
the suction line temperature will be unusually cold.
Compressor run time will be longer than normal.
Undercharge symptoms: Long run time, poor cooling and
a hot compressor dome are the main symptoms of an
undercharge.
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