Viessmann VITODENS 100-W Installation And Service Instructions Manual page 14

Installation sequence
Electrical connections
Outside temperature sensor (accessory)
1. Plug the lead supplied with the out-
side temperature sensor into socket
"X21".
Routing leads and closing control unit casing
!
Please note
Leads will be damaged if they come into contact with hot parts.
When routing and securing leads on site, ensure that the maximum permis-
sible temperatures for these cables are not exceeded.
3.
14
(cont.)
1.
2.
2. Connect the outside temperature
sensor to terminals 3 and 4.