Brazing Procedure - Emerson Copeland EazyCool ZX Series Manual


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 to
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
During brazing
protect housing
with damp cloth
Figure 6: Sectional view

3.3.3 Brazing procedure

For brazing of the tubes, please refer to Figure 7 and procedure hereunder:
Figure 7: Suction tube brazing
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.
WARNING
Danger of frostbite! Liquid line should be insulated with 19 mm insulation
thickness. Temperature could be as low as –15°C.
16
During brazing
pull back line
insulation
1. Fit the copper tube into the compressor tube.
2. Heat area 1. As the tube approaches brazing temperature:
3. 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.
4. Add braze material to the joint while moving the torch
around the joint to flow braze material around the
circumference.
5. Then heat area 3. This will draw the brazing material down
into the joint.
C6.1.6/1108-0509/E