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Figure 12: Suction tube brazing areas
▪
The copper-coated steel tubes on scroll compressors can be brazed in approximately the
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 tube fitting inner diameter and tube outer diameter are clean prior to assembly.
▪
Using a double-tipped torch, apply heat in area 1.
▪
As the tube approaches brazing temperature, move the torch flame to area 2.
▪
Heat area 2 until braze temperature is attained, moving the torch up and down and rotating
around the tube as necessary to heat the tube evenly. Add braze material to the joint while
moving the torch around the joint to flow braze material around the circumference.
▪
After the braze material flows around the joint, move the 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.
To disconnect:
▪
Heat joint areas 2 and 3 slowly and uniformly until the braze material softens and the tube can
be pulled out of the fitting.
To reconnect:
▪
Recommended brazing materials: Silfos with minimum 5% silver or silver braze used on other
compressors. Due to the different thermal properties of steel and copper, brazing procedures
may have to be changed from those commonly used.
3.5
Shut-off valves and adaptors
CAUTION
Leaking system! System breakdown! It is strongly recommended to
periodically re-torque all pipe and fixing connections to the original setting after
the system has been put into operation.
Figure 12
C6.2.44/0219/E
The Copeland Scroll compressor versions with stub
tubes
have
copper-plated
discharge tubes. These tubes are far more robust
and less prone to leaks than copper tubes. Due to
the different thermal properties of steel and copper,
brazing procedures may have to be changed from
those commonly used.
Refer to
and the procedure below for the
Figure 12
brazing of the suction and discharge lines to a scroll
compressor.
steel
suction
and
11
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