RS5290000 Rev. 0
44
April 1998
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 for HFC134a. Robinair, Model 15600, 2
stage, 170 litres (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. Do not
leave mechanical 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
• Tubing cutter
• Flux
• Sil-Fos
• Silver solder
• Oil for swagging and flaring
Use only part #R0157532
• Copper tubing
Use only part #R0174075 and #R0174076
• Dry nitrogen
99.5% minimum purity, with -40°C (-40°F) or lower dew
point
• Crimp tool
• Tube bender
• Micron vacuum gauge
• Process tube adaptor kit
• Heat trap paste
• ICI appliance grade HFC134a
Drier Replacement
Prior to opening refrigeration system, recover
HFC134a refrigerant for safe disposal.
Every time sealed HFC134a system is repaired, drier
filter must be replaced with, part # B2150504.
Cut drier out of system by completing the following
steps. Do not unbraze drier filter. Applying heat to
remove drier will allow moisture into system.
!
WARNING
To avoid death or severe personal injury, cut drier at
correct location. Cutting drier at incorrect location will
allow desiccant beads to scatter. Completely clean
area of beads, if spilled.
1. Score capillary tube close to drier and break.
2. Reform inlet tube to drier allowing enough space for
large tube cutter.
3. Cut circumference of drier at 3 cm (1-1/4"), below
condenser inlet tube joint to drier.
4. Remove drier.
5. Apply heat trap paste on post condenser tubes to
protect grommets from high heat.
6. Unbraze remaining part of drier. Remove drier from
system.
7. Discard drier in safe place. Do not leave drier with
customer. If refrigerator is under warranty, old drier
must accompany warranty claim.
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all earth wires are connected before certifying unit as repaired and/or operational.
!
WARNING
Service Procedures