Gram Connection And Wiring Diagram - External Connections - Viessmann Vitodens 222-F Installation And Service Instructions Manual

Connection and wiring diagram
Fig. 80
A1 Main PCB
A2 Switching mode power supply
A3 Optolink
A4 Burner control unit
A5 Programming unit
A6 Coding card
A7 Connection adaptor
A8 LON communication module (accessories)
A9 Internal H1 or H2 extension (accessories)
S1 ON/OFF switch
S2 Reset button
X... Electrical interfaces
Outside temperature sensor
!
Flow temperature sensor, low loss header
?
external connections
–
% Cylinder temperature sensor (plug on cable har-
ness)
Internal circulation pump
sÖ
Cylinder primary pump
sA
DHW circulation pump (connect DHW circula-
sK
tion pumps with standalone functions directly to
the 230 V
Gas solenoid valve
dG
Power supply
fÖ
External safety solenoid valve
gD
Power supply for accessories and Vitotrol 100
lH
Fan motor
a-Ö
A Fan motor control
a-Ö
aYA Gas pressure switch
Connection and wiring diagram
∼
supply)
117