Viessmann Vitocrossal 200 Service Instructions For Contractors page 49

Overview of burner components
Pressure-jet gas burner, type VMA III, 115 to 311 kW
A
B
C
D
E
F
G
H
K
L
M
Fig. 52
Boiler door
A
Air pressure switch 1
B
Fan
C
Display and programming unit
D
Gas train
E
F Gas supply pipe
Gas shut-off valve
G
Burner gauze assembly
H
Ignition electrodes
K
Not shown: choke valve for 142 and 186 kW and rotary
damper for 246 and 311 kW.
(cont.)
T
S
R
Q
D
P
N
F
G
Ionisation electrode
L
Thermal insulation block
M
Burner control unit
N
Ignition unit
P
Suppressor choke box
Q
R Inlet adaptor for room sealed operation (for 115,
142 and 186 kW)
Venturi mixing pipe
S
Air pressure switch 2
T
Component overview
49