Burner Control Unit Connection Diagram - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Vitocrossal 200 CM2 186 to 311 Service

Burner Control Unit Connection Diagram

A Burner control unit interface VUC 310/base
B Flame sensor aA
C Vitotronic control unit
D Servomotor for burner inlet (models 246/311) damper
or 2/2-way solenoid valve (Model 186) dK/axS
E Ignition unit gF
F Gas valve V1 dG
G Gas valve V2 dH
H Fan motor with PWM control and feedback
I Boiler temperature sensor 1 3A
J Boiler temperature sensor 2 3B
K AC-EMI suppression filter device
L Flue gas temperature sensor 1 15A
M Burner display and programming unit
N Gas pressure switch (outlet pressure at first valve
seat) kJ GDW2
O Inlet fan pressure switch acA (APS1)
P Inlet gas pressure switch ayA GDW1
Q Flue gas temperature sensor 2 15B
R Overfire pressure switch
100A
(APS2)
131A
F1 Fuse
F2 Fuse
H1 Hours run meter, modulation (Vitotronic control)
H2 Fault message (Vitotronic control)
S1 ON/OFF switch (only to the boiler control,
line voltage still present at burner base)
avG KM-BUS
fA Boiler control wiring to burner
Power supply, 120 VAC, 60Hz
40
/abH Boiler control to burner base wiring
40
and Flue gas damper (for accessory optional)
53 53/100
B1 Boiler junction box
B2 Burner base
B3 Burner contactor
WARNING
Disconnect power inside the boiler junction box, before
servicing boiler.
CAUTION
Provide disconnect means and overload protection as
required.
Wiring
63