}
Application Engineering
B U L L E T I N
AE4-1374 R1
3
2
1
Figure 8
Scroll Suction Tube Brazing
New Installations
Field Service
• The copper-coated steel suction tube on scroll
compressors can be brazed in approximately the
WARNING
same manner as any copper tube.
• Recommended brazing materials: Any silfos
material is recommended, preferably with a
minimum of 5% silver. However, 0% silver is
acceptable.
• Be sure suction tube fitting I.D. and suction tube
O.D. are clean prior to assembly. If oil film is
present wipe with denatured alcohol, Dichloro-
Trifluoroethane or other suitable solvent.
• Using a double-tipped torch apply heat in Area 1.
As tube approaches brazing temperature, move
torch flame to Area 2.
• Heat Area 2 until braze temperature is attained,
moving torch up and down and rotating around
tube as necessary to heat tube evenly. Add
braze material to the joint while moving torch
around joint to flow braze material around
circumference.
• After braze material flows around joint, move
torch to heat Area 3. This will draw the braze
material down into the joint. The time spent
heating Area 3 should be minimal.
• As with any brazed joint, overheating may be
detrimental to the final result.
© 2013 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
Remove refrigerant charge from both the low and
high side of the compressor before cutting the
suction and discharge lines to remove
the compressor. Verify the charge has been
completely removed with manifold gauges.
• To disconnect: Reclaim refrigerant from both the
high and low side of the system. Cut tubing near
compressor.
• To reconnect:
○ Recommended brazing materials: Silfos
with minimum 5% silver or silver braze
material with flux.
○ Insert tubing stubs into fitting and connect
to the system with tubing connectors.
○ Follow New Installation brazing
19
