External Blocking Via Switching Contact - Viessmann Vitotronic 100 Installation And Service Instructions Manual

External demand via 0-10 V input
[{{] 0-10V aBJ f-]
A
+ - S P Ö L
U
+
Fig. 18

External blocking via switching contact

Connection options:
Plug if no Vitotrol is connected.
■ lH
■ EA1 extension (accessories, see page 65).
■ Plug of external H5 extension (accessories, see
aBÖ
page 66).
Plug
aBÖ
A
EIN EIN
STB N STB
TR TR
B
Floating contact
A
Remove jumper "TR"
B
When the contact is open, the burn-
er is switched OFF.
Note
Connect only safety shutdown
equipment, e.g. a temperature limit-
er, to these terminals.
(cont.)
fÖ
N N
L
Plug
lH
A
1 L N
?
B
Floating contact
A
Plug
B lH
"ON/TR"
–
When the contact is closed, the burner is switched off. The heating circuit
pump and circulation pump for cylinder heating are switched according to
the set code (see the following table "Codes").
≙
0 1 V No specified set boiler water temperature
–
≙
1 V Set value 10 °C
≙
10 V Set value 100 °C
!
Please note
Live contacts lead to short circuits or phase fail-
ure.
The external connection must be potential-
free.
EA1 extension
lH
A
A
B
Electrical connections
B
[{A [{S [{D
DE DE DE
Floating contact
EA1 extension
21