Brazing Procedure; Electrical Connection; Figure 21: Suction Tube Brazing Areas - Emerson Copeland EazyCool ZX Series Application Manuallines

3.2.3 Brazing procedure

WARNING
Air/A2L refrigerant mixture! Fire hazard! For systems using flammable A2L
refrigerant, it is mandatory to flush oxygen-free nitrogen through the piping
during the brazing process.
Brazing must be carried out in compliance with ISO14903.
Refer to Figure 21 and procedure below for the brazing of the stub tube connections of a scroll

Figure 21: 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.
3.3

Electrical connection

WARNING
Conductor cables! Electrical shock hazard! Shut off power supply before
undertaking any task on electrical equipment.
WARNING
Ignition source in a potentially flammable atmosphere! Fire hazard! The
electrical connection of the scroll compressors is not an ignition source during
normal operation but could become one if not installed properly according to
installation instructions. Ensure correct mechanical and electrical installation.
System capacitors may remain charged for several minutes after shutdown.
Before starting to work on the electrical installation make sure sparking is not
possible. Continuously check if the ambient atmosphere is non-flammable
when working on the electrical installation.
IMPORTANT
It is strongly recommended to install an additional circuit breaker for the unit
power supply in order to be able to switch the unit off remotely in case of failure.
IMPORTANT
The front cover of the electrical cabinet is protected by a ground connection.
Open the electrical box cover carefully to avoid pulling out the ground wire.
32
compressor:
▪
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.
AGL_Unit_ZX_A2L_E_Rev00