Viessmann Vitopend 100-W Installation And Service Instructions Manual page 27

Electrical connections
Connection Vitotrol 100, type UTDB-RF
X7
1 2 3 4
B
1 2 3 4
A
A Vitotrol 100, type UTDB-RF
B Terminals on the control unit
(cont.)
Note
Observe parameter "P08", see
page 66.
Recommended connecting cable
■ 2-core cable for low voltage
220 V∼
Installation sequence
27