12
AGL_Unit_ZX_Small_E_Rev03
Figure 7: Brazing
– Sectional view
3.2.3
Brazing procedure
For the brazing of the tubes, please refer to
Figure 8
and procedure hereunder:
▪
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.
▪
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
Earth leakage current! Electrical shock hazard!
The power supply of these
units must include an RCD protection with a sensitivity of 30 mA.
IMPORTANT
The front cover of the electrical box is protected by a ground connection.
Open the electrical box cover carefully to avoid pulling out the ground wire.
3.3.1
Power supply connections
The electrical connection of the refrigeration unit to the power supply must be made by qualified
technicians in compliance with valid electrical standards, for instance DIN EN 60204-1. Also, the
voltage drops and temperature on line must be considered for cable selection.
Copeland ZX Small units are designed for 220-240 V / 1 Ph / 50 Hz power supply. A voltage
tolerance of ± 10 % is acceptable.
The circuit breaker must be switched off before opening the front panel.
Before commissioning the unit, ensure that the neutral "N" and ground protection "PE" wires are
connected to the main switch.
Figure 8: Suction tube brazing areas
