Viessmann Vitodens 222-F B2TA series, Installation And Service Instructions Manual

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24
L
?
N L
?
N
fÖ
S P
aBJ
230 V~
Ö
[{{]
0-10V
f-]
A
U
0-10 V
­
+
+ -
0 – 1 V
≙
No default set boiler water
temperature
1 V
≙
Set value 10 °C
10 V
≙
Set value 100 °C
External blocking via switching contact
Connection options:
■ Plug
lH
.
■ Extension EA1 (accessory, see sepa-
rate installation instructions).
The burner is switched off if this contact
is closed. The heating circuit pump and
(if installed) the circulation pump for cyl-
inder heating are switched according to
the set code (see following table
"Codes").
!
Please note
'Live' contacts lead to short cir-
cuits or phase failure.
The external connection
must be
potential-free and comply with
the requirements of safety cate-
gory II.
Installing the boiler
Electrical connections
(cont.)
5773 216 GB