External Demand Via 0-10 V Input - Viessmann Vitotronic 100 Installation And Service Instructions Manual

Electrical connections
External demand via switching contact
Connection options:
■ EA1 extension (accessories, see page 65).
■ Plug if no Vitotrol 100 is connected.
lH
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
Floating contact (when connecting, remove
A
jumper between L and 1)
Rated voltage 230 V~
Rated current 10 mA~
When the contact is closed, burner operation is load-dependent. The boiler water is heated to the value set in
coding address "9b" in group 1 "General". The boiler water temperature is limited by this set value and the elec-
tronic maximum limit (coding address "06" in the "Boiler" group).
Codes
Plug
lH
"40:1" in group 1 "General"
Select the effect of the function on the heating circuit pump in coding address "d7" in group 5 "Heating circuit".
■
Select the effect of the function on the circulation pump for cylinder heating in coding address "5F" in group 3
■
"DHW".

External demand via 0-10 V input

Connection at input 0 10 V to EA1 extension (see
–
page 65).
Ensure galvanic separation between the earth conduc-
tor and the negative pole of the on-site power source.
Observe coding address "1E" in group 1 "General".
20
EA1 extension
[{A
DE
A
Floating contact
A
EA1 extension
B
EA1 extension
Set "3A" (DE1), "3b" (DE2) or "3C" (DE3) in group 1 "General" to 2.
B
[{S [{D
DE DE