Viessmann VITODENS 100-W Installation And Service Instructions Manual page 24

Installation sequence
Electrical connections
Connection of room temperature controller with time switch and DHW cylinder
with 2-way valve and 230 V cylinder temperature controller
A Cylinder demand junction box
B Jumper, remove when making this
connection
C Power supply (230 V, 50 Hz).
See page 26.
D 230 V cylinder temperature control-
ler
24
(cont.)
%
A H
G
C
E 2-way shut-off valve
F High limit safety cut-out
G Time switch
H Room temperature controller
D
M
1~
E
F