Water Connection - Bosch L 309 Series Technical Information

Connection instructions

5.2. Water connection

10
Power Supply Module
- Connect the PE bolt of the power supply module's base plate with a centralized
earthing point. Please ensure a sufficient cable cross-section!
- Lead mains connection L1* (cf. dimensioned drawings in "Dimensions" sec-
tion) as an auxiliary phase of mains phase L1 to flat connector X3/7 (L1) of the
power supply module's circuit board using a suitable cable (1.5 mm
circuit-proof).
- The conductor cross-sections for phase L2 and the welding transformer's out-
going feeder V must be dimensioned depending on the connected load.
- Connect phase L2 to the marked thyristor connection using a cable lug for
threaded bolts and a suitable bolt.
- Connect outgoing welding transformer feeder V to the marked thyristor connec-
tion using a cable lug for threaded bolts and a suitable bolt.
NOTE
Bolted cable lug connections must be properly tightened. Use second wrench, if
necessary.
The cooling water connections are located at the back of the power supply mod-
ule's base plate (dimensions and connections see dimensioned drawings in "Di-
mensions" section). If the module is directly installed at the housing or switch cabi-
net wall, cooling water lines in the actual housing/switch cabinet are not necessary.
CAUTION!
- Check the cooling water lines for leaks before switching the mains voltage on.
!
- Ensure that the required water throughput is guaranteed and that the max. wa-
ter inlet temperature is not exceeded (see "Cooling" in "Technical data" section)!
Type L 309
PE
L1
X3/7
2
min., short-
PE
V
L2
1070 078 131-104 (00.05) GB