Viessmann VITODENS 100-W Installation And Service Instructions Manual page 41

Connection and wiring diagram
B Vitotrol 100, type UTA or on-site
room thermostat
C
Vitotrol 100, type RT or on-site
room thermostat
D Vitotrol 100, type UTD or on-site
room thermostat
E Mains input 230 V/50 Hz
F
Open Therm connection (remote
control)
G Outside temperature sensor
(accessory)
H Time switch (accessory)
K
Gas pressure limiter (accessory)
(cont.)
L PCB inside the control unit
X ... Electrical interface
§ Boiler water temperature sensor
% Cylinder demand terminal box
(accessory)
aG Flue gas temperature sensor
aJ
Return temperature sensor
sÖ Circulation pump
dD Flow switch
dG
Gas solenoid valve
fJ Temperature limiter
a-Ö Fan motor 230 V~
a-ÖA Fan control
Designs
41