Service Procedures - Viking VCBB360R Service Manual

Service Procedures

Service Equipment
Listed below is equipment needed for proper
servicing of HFC134a systems. Verify equipment is
confirmed by manufacturer as being compatible with
HFC134a and ester oil system.
Equipment must be exclusively used for HFC134a.
Exclusive use of equipment only applies to italic
items.
•
Evacuation Pump
Check with vacuum pump supplier to verify
equipment is compatible
Robinair, Modes 15600, 2 stage, 6 cubic feet per
minute pump is recommended.
•
Four-way manifold gauge set, with low loss
hoses .
•
Leak detector
•
Charging cylinder
•
Line piercing saddle valve
(Schroeder valves). Seals must be HFC134a and
ester oil compatible. Line piercing valves may
be used for diagnosis but are not suitable for
evacuation or charging, due to minute holes
pierced in tubing.
access valves on system. Valves eventually will
leak. Molecules of HFC134a are smaller than
other refrigerants and will leak where other
refrigerants would not.
•
Swagging tools
•
Flaring tools
•
Flux
•
Sil-flos
•
Silver solder
•
Oil for swagging and flaring
•
Copper tubing
•
Dry nitrogen
99.5% minimum purity, with -40°F or lower
dew point.
•
Crimp tools
•
Tube bender
•
Micron vacuum gauge
•
Process tube adaptor
•
Heat trap paste
•
ICI appliance grade HFC134a
To avoid risk of electrical shock, personal injury, or death, disconnect electrical
power source to unit and discharge capacitor through resistor before attempting to
service, unless test procedures require power to be connected. Ensure all ground
wires are connected before certifying u nit as repaired and / or operational
for HFC134a.
Do not leave mechanical
Refrigerant Precautions
To avoid personal injury, do not allow refrigerant
to contact eyes or skin.
To avoid risk of property damage, do not use
refrigerant other than that shown on unit serial
number identification plate.
NOTE; All precautionary measures recommended by
refrigerant manufacturers and suppliers
apply and should be observed.
Line Piercing Valves
Line piercing valves can be used for diagnosis, but
are not suitable for evacuating or charging due to
holes pierced in tubing by valves.
NOTE; Do not leave line piercing valves on system.
Connection between valve and tubing is not
hermetically sealed. Leaks will occur.
Open Lines
During any processing of refrigeration system, never
leave lines open to atmosphere. Open lines allow
water vapor to enter system, making proper
evacuation more difficult.
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