User Manual for WTF Freezers
Beverage-Air
Rev. 07/22
Beverage-Air
21
FOR THE SERVICE TECH - R290
Refrigeration service should only be attempted by a trained trade professional certified 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
flame 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.
