Technical data

22
5584 069 - 05
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Installation
Electrical Connections
1. Route the burner cables to the burner; apply strain
reliefs or cable connectors as required.
2. Plug burner cable
41
and KM BUS cable
145
into
the burner control unit.
3. Plug control unit connecting cable
40/156
, boiler
sensor leads
3
A/
3
B, flue gas sensor lead
15
A/
15
B
and power cable
40
into the couplings on the
mounting plate on the burner side.
4. Plug control unit connecting cable
40/156
,
41
and
KM BUS cable
145
into the corresponding
connections of the Vitotronic control.
Note: For details of lead and cable routing see page 23.
3
A/
3
B Boiler water temperature sensor
15
A/
15
B Flue gas temperature sensor
40
Power cable to junction box
40/156
Vitotronic power supply
41
Burner cable to Vitotronic control
53
Rotary vent damper connection
(optional accessory not used)
145
KM BUS cable to Vitotronic control
Note: Never allow cables or leads to come into contact
with hot components. Secure all cables and leads
with cable ties.
Boiler
Note: Route 120V cables and low voltage leads separately.
Connect power cable with plug
40
to the power supply.
Boiler Power Supply
WARNING
Incorrect core allocation can result in serious injury
and damage to the appliance. Never interchange cores
“L1”, “L2” and “N”.
Legend
A Burner control unit
B Vitotronic control
C Mounting plate with mains filter
D Power supply (cable with plug
40
)
E Connecting cable
40/156