6
Installation and connections
Electrical connections
(cont.)
VitotronicĂ050 heating circuit control
unit
Connect via Viessmann 2ĆwireĂBUS
in accordance with the diagram
(see page 5).
A
Cascade control unit
B
VitotronicĂ050 with communications
module Viessmann 2ĆwireĂBUS,
part no.Ă7143Ă710
C
Connection cable Viessmann
2ĆwireĂBUS, part no.Ă7174Ă994, for
connecting the cascade control
unit with the first VitotronicĂ050
D
Connection cable Viessmann
2ĆwireĂBUS, part no.Ă7814Ă624, for
connecting the first VitotronicĂ050
with the further VitotronicĂ050
Set the differential temperature
between the boiler water and the set
flow temperature at VitotronicĂ050.
Code
"9F:8"
(as delivered condition)
must be set.
If the outside temperature for
VitotronicĂ050 is to be adopted from
the cascade control unit, set code
"97:1"
.
Distribution pump
Connect acc. to diagram (see
pageĂ5).
Connection load capacity:
max. 4ĂAă230ĂV~.
Fault indication
H
Fault message contact (volt-free)
at mains voltage potential
230ĂV~, 1
Ă
(0.5)ĂA
Plug the separator in (see pageĂ5)
to the right of terminal blockĂ"17/18".
H
Fault message contact (volt-free) at
safety low voltage 24ĂVć/~, 2ĂA
Plug the separator in (see pageĂ5)
to the left of terminal blockĂ"17/18".
¨
Strip a minimum length of
insulation off the cable.
Connect in accordance with the
diagram (see pageĂ5).
Mains electrical connection
Connect the supplied mains cable in
accordance with the diagram (see
pageĂ5).
5862Ă474ĂGB
S1
4
A
S1
5
B
B
C
D
D
