Installation and operating instruction
Oil burner WM-L20/2-A R (W-FM100/200)
5 Installation
83252902 1/2019-09 La
30-84
5.2 Electrical connection
DANGER
Risk of electric shock
Working on the device when voltage is applied can lead to electric shock.
Isolate the device from the power supply prior to starting any work.
Safeguard against accidental restart.
WARNING
Electric shock caused by frequency converter
It is possible that electrical components continue to carry voltage and cause elec-
tric shock even after the voltage supply has been disconnected.
Wait approx. 5 minutes before commencing work.
Electric voltage has dissipated.
The electrical connection must only be carried out by qualified electricians. Ob-
serve local regulations.
Connect combustion manager
Use cable entry grommets on the housing.
Connect wiring to wiring diagram enclosed.
Control circuits, which are taken directly via a 16 AB fuse from a 3 phase or
single phase alternating current supply, must only be connected between a phase
conductor and earth potential neutral conductor.
On mains supply, which does not have a neutral, the control voltage must be sup-
plied via an isolating transformer. The pole of the transformer, which is to be used
as the neutral conductor, must be earthed.
Phase L must not be mixed up with the neutral conductor N. Contact protection will
otherwise no longer be given. Malfunctions, which endanger operational safety
could occur.
The cable cross section of the voltage supply must be suitable for the nominal cur-
rent of the external fuse (maximum 16 AB). All other cable connections must be
suitable for the relevant internal unit fuse (T6.3H).
Earthing and neutral conductor must conform to local regulations.
The following applies for cable length:
all cable lengths maximum 100 m,
use only original Weishaupt parts as Bus line,
install Bus line as line configuration.
