Brazing Procedure; Location & Fixings; Figure 28: Brazing - Sectional View; Figure 29: Suction Tube Brazing Areas - Emerson Copeland Eazycool OMTE-90D-TFD Application Manuallines

▪
Remove the discharge connection cap.
▪
Remove the suction connection cap.
▪
Open both valves mid-way. Care should be taken to avoid the holding charge releasing too
quickly.
▪
Be sure tube fitting inner surface and tube outer surface are clean prior to assembly.
▪
Both tubes are extended from the condensing unit housing, therefore Emerson recommends
isolating 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.

Figure 28: Brazing - Sectional view

3.3.4

Brazing procedure

For brazing of the tubes, please refer to Figure 29 and procedure hereunder:

Figure 29: Suction tube brazing areas

▪ Then heat area 3. This will draw the brazing material down into the joint.
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 procedure above.
3.4 Location & fixings
IMPORTANT
Dust and dirt contamination! Unit life reduction! The unit should always be
installed in a location that ensures clean air flow. External fouling of the
condenser fins also leads to high condensing temperatures or pressures and
will reduce the lifetime of the unit.
It is mandatory to keep a clearance space around the unit as shown in chapter 3.5 "Required
distances" – see Figure 30, dimensions in blue colour. Both service access and airflow have been
considered in making these recommendations
30
▪
Fit the copper tube into the unit tube.
▪
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.
C6.1.9/0219/E