AGL_Unit_LOCU_EN_Rev00
31
3.2.4 Brazing procedure
Ref er to
Figure 31
and procedure below for the brazing of the tubes:
▪
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.
NOTE: Due to the different thermal properties of steel and copper, brazing procedures may
have to be changed from those commonly used.
To disconnect:
▪
Heat joint areas 2 and 3 slowly and uniformly until solder softens and tube can be pulled out of
the f itting.
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.
3.3.1 Power supply connections
WARNING
Electrical pins under voltage! Electrical shock hazard!
There are unused
f ast-on pins
(C1 & DO2)
on the XCM25D which could be under voltage. They
are covered by insulated f ast-on f lags in the f actory. Handle carefully when
removing insulating flags during service on site.
The electrical connection of the ref rigeration unit to the power supply must be made by qualified
technicians in compliance with valid electrical standards, eg, DIN EN 60204-1. Additionally, the
voltage drop and line temperatures must be considered for cable selection.
Copeland LOCU refrigeration units are designed for 380-420 V / 3 Ph / 50 Hz power supply. A voltage
tolerance of ± 10 % is acceptable.
The main switch and the circuit breaker must be switched off before opening the front panel.
Bef ore commissioning, ensure that the neutral "N" and ground protection "PE" wires are connected
to the main switch.
3.3.2 Maximum operating currents for cable selection
Unit model
Locked rotor
(A)
Rated current
(A)
OMTE-76D-TFD-501
64 + 65.5
28
OMTE-90D-TFD-501
2 x 74
30
OMTE-152D-TFD-501
2 x 118
55
OLE-49-TFD-501
139
27
OLTE-82D-TFD-501
2 x 118
66
Table 23: Locked rotor and rated current
Figure 31: Suction tube brazing areas
Содержание Copeland OLE-49
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