External Demand Via Switching Contact; Connection; Codes; External Demand Via - Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

External demand via switching contact

Connection options:
■ Plug lH
■ EA1 extension (accessories, see page 91)

Connection

!
Please note
'Live' contacts lead to short circuits or phase fail-
ure.
The external connection must be potential-
free.
Plug
lH
A
1 L N
?
lH
B
Floating contact
A
Plug
B lH
Rated voltage
Rated current
Recommended connecting cable H05VV-F3G 0.75 mm
When the contact is closed, burner operation is load-dependent. The boiler water is heated to the value set in
coding address "9b" in the "General" group. The boiler water temperature is limited by this set value and the
electronic maximum limit (coding address "06" in the "Boiler" group).

Codes

Plug
lH
"40:1" in the "General" group
Set the effect of the function on the relevant heating circuit pump in coding address "d7" in the "Heating cir-
■
cuit" group.
Select the effect of the function on the circulation pump for cylinder heating in coding address "5F" in the
■
"DHW" group.

External demand via 0

Connection at input 0 10 V to EA1 extension (see
–
page 91).
Ensure DC separation between the earth conductor
and the negative pole of the on-site voltage source.
Note coding address "1E" in the "General" group.
230 V~
10 mA~
2
EA1 extension
Set "3A" (DE1), "3b" (DE2) or "3C" (DE3) in the "General" group to 2.
10 V input
–
Electrical connections
EA1 extension
[{A [{S
DE DE
A
Floating contact
A
EA1 extension
B
B
[{D
DE
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