Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 23

Electrical connections
Plug lH
A
1 L N
?
lH
A Floating contact (when connecting,
remove jumper across L and 1)
Codes
■ "4b:1" in group "General"/1.
■ Effect of the function on the relevant
heating circuit pump:
Coding address "d7" in group "Heating
circuit" (only with weather-compensa-
ted control units).
■ Effect of the function on the circulation
pump for cylinder heating (if installed):
Coding address "5F" in group "DHW"/
3.
External demand via 0 – 10 V input
Connection at 0 – 10 V input to exten-
sion EA1.
Ensure DC separation between the earth
conductor and the negative pole of the
on-site voltage source.
(cont.)
Extension EA1
[{A
DE
A
A Floating contact
B Extension EA1
Codes
■ Set "3A" (DE1), "3b" (DE2) or "3C"
(DE3) in group "General"/1 to 2.
■ Effect of the function on the relevant
heating circuit pump:
Coding address "d7" in group "Heating
circuit" (only with weather-compensa-
ted control units).
■ Effect of the function on the circulation
pump for cylinder heating (if installed):
Coding address "5F" in group "DHW"/
3.
Installing the boiler
B
[{S [{D
DE DE
23