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Connecting the control unit
Overview of electrical connections, burner control unit
W
V
U
T
S
R
W
P
O
N
M
Fig. 26
Junction box
A
Mains connection to main MCB/fuse 400 V/50 Hz,
B
see the following chapter
Burner control unit VUC 310
C
Flame monitor (ionisation current)
D
Vitotronic control unit
E
Servomotor for rotary damper or 2/2-way solenoid
F
valve
Flue gas damper
G
Ignition unit
H
Fuel valve BV1
K
32
(cont.)
A
C
L
M
N
O
P
R
S
T
U
V
W
D
F
G
H
K
L
Fuel valve BV2
Display and programming unit
Gas pressure switch GDW2
Air pressure switch 1
Gas pressure switch GDW1
Air pressure switch 2
Flue gas temperature sensor 2
Flue gas temperature sensor 1
Boiler water temperature sensor 2
Boiler water temperature sensor 1
Fan motor with PWM switching and feedback
B
E
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