Viessmann Vitodens 100-W Installation And Service Instructions Manual page 54

Designs
Connection and wiring diagram
D Vitotrol 100, type RT or on-site
room temperature controller
E Vitotrol 100, type UTD or on-site
room temperature controller
F Mains input 230V/50Hz
G Remote control (accessory)
H Outside temperature sensor
(accessory)
K Time switch (accessories)
L Gas pressure limiter (accessory)
M PCB inside the control unit
X ... Electrical interface
54
(cont.)
§ Boiler water temperature sensor
$ Outlet temperature sensor (gas
fired condensing combi boiler)
% Cylinder temperature sensor
(gas fired condensing boiler)
aG Flue gas temperature sensor
sÖ Circulation pump 230V~
dG Gas solenoid valve
fJ Temperature limiter
a-Ö Fan motor 230V~
a-ÖA Fan control
aVL Flow sensor