Viessmann VITODENS 100-W Installation And Service Instructions Manual page 51

Connection and wiring diagram
D Vitotrol 100, type RT or on-site
room temperature controller
(switched input 230 V)
E Vitotrol 100, type UTDB or on-site
room temperature controller
(switched 230 V input)
F Power supply 230 V/50 Hz
G
Gas pressure switch (Open-
Therm appliance)
H PCB inside the control unit
X ... Electrical interface
(cont.)
§ Boiler water temperature sensor
$ Outlet temperature sensor
% No function
aG Flue gas temperature sensor
sÖ Circulation pump 230 V~
dG Gas solenoid valve
fJ Temperature limiter
a-Ö Fan motor 230 V~
a-ÖA Fan control
aVL Flow sensor
Designs
51