Viessmann VITODENS 111-W Installation And Service Instructions Manual page 22

Installation sequence
Electrical connections
Outside temperature sensor (acces-
sories)
1. Fit outside temperature sensor.
Installation site:
■ North or north-westerly wall, 2 to
2.5 m above ground level; in multi
storey buildings, in the upper half of
the 2nd floor
■ Not above windows, doors or vents
■ Not immediately below balconies
or gutters
■ Never render over
■ Connection:
2-core lead, length up to 35 m with
a cross-section of 1.5 mm
Vitotrol 100 connection
C
B
1 L N
A
Example: Vitotrol 100, type UTDB
A Vitotrol 100, type UTDB
B Terminals "X1" on the control unit
Recommended connecting cable
■ 2-core cable with a cross-section of
1.5 mm² for 230 V~
22
(cont.)
2
X1
NO
NC
COM
2. Connect the outside temperature
sensor to terminals 3 and 4 of the
power cable (see page 21).
C Jumper, remove when making this
connection