Electrical Connections - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Opening the control unit enclosure
!
Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing any work, touch earthed
objects such as heating or water pipes to dis-
charge static loads.

Electrical connections

Information on connecting accessories
When connecting accessories observe the sep-
arate installation instructions provided with
them.
C
%
4 3 2 1
A B
Fig. 13
Only for weather-compensated mode:
A
Outside temperature sensor (accessories)
OpenTherm device
B
Remove jumper when making this connection.
D
Connecting cable
C
Jumper
D
Power supply (230 V, 50 Hz).
E
See page 20.
Vitotrol 100 or on-site room temperature controller
F
(230 V switched input)
Remove jumper when making this connection.
D
Separate installation instructions
(cont.)
D
96
L
?
E F
Gas condensing system boiler:
%
With Viessmann DHW cylinders: cylinder tem-
■
perature sensor (plug on the cable harness out-
side the control unit)
■ In the case of alternative DHW cylinders compli-
ant with the G3 Directive:
Cylinder demand junction box (for connection of
a cylinder temperature controller and a 2-way
shut-off valve)
Operation without DHW cylinder:
■
Set the set DHW temperature to "OFF".
Operating instructions
Installation sequence
17