Refrigeration Connections; Brazing Recommendation - Emerson Copeland EazyCool OM-15-PFJ Application Manuallines

3.5

Refrigeration connections

3.5.1

Brazing recommendation

Remove the fishtails (=compressed tube ends) by cutting them off in the following
sequence:
1. Remove the discharge connection fishtail
2. Then remove the suction connection fishtail
Removing the plugs in this sequence prevents oil mist from coating the suction
tube making brazing difficult.
Be sure tube fitting inner diameter and tube outer diameter are clean prior to
assembly.
Both tubes are extended from the condensing unit housing, therefore we
recommend isolate the housing by using a wet cloth on the copper tubing.
Recommended brazing materials: A copper/phosphorous or
copper/phosphorous/silver alloy rod should be used for joining copper to copper
whereas to join dissimilar or ferric metals a silver alloy rod either flux coated or
with a separate flux would be used.
Use a double-tipped torch
End of tube
Brazing of the tubes:
For brazing of the tubes see illustration below and the following procedures:
Fit the copper tube into the compressor tube.
1.
2.
3.
4.
NOTE 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 solder softens and tube can be pulled
out of the fitting.
To reconnect:
See the procedure above.
C6.1.2/0105-0705/E
Sectional view
During brazing
protect housing
with a damp cloth
Heat area 1. As the tube approaches brazing temperature:
Heat area 2 until braze temperature is attained. It is necessary
to heat the tube evenly. Move the torch up and down and
rotating around the tube.
Add braze material to the joint while moving the torch around
the joint to flow braze material around the circumference.
Then heat area 3. This will draw the brazing material down into
the joint.
Part No: 3125713
During brazing
pull back line
insulation.
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