Viessmann VITODENS 111-W Installation And Service Instructions Manual page 17

Electrical connections
X21
X7
X20
C
4 3 2 1
OT
A B
A Only for weather-compensated
mode:
Outside temperature sensor (acces-
sory)
B OpenTherm device
Remove jumper D when making
this connection.
C Connecting cable (accessory)
D Jumper
Accessory connection
Accessory installation instruc-
tions
When connecting a Vitotrol 100 or an
OpenTherm remote control, remove the
jumper across L and 1.
(cont.)
E Power supply (230 V, 50 Hz).
See page 18.
F Vitotrol 100 or on-site room temper-
ature controller (switched 230 V
input)
Remove jumper D when making
this connection.
Outside temperature sensor (acces-
sory)
1. Fit outside temperature sensor.
Installation sequence
D
X1
L N 1 L N
?
E F
Separate installation instruc-
tions
17