Viessmann VITODENS 242-F Installation And Service Instructions Manual page 35

Electrical connections
Plug lH
A
1 L N
?
lH
A Floating contact (when connecting,
remove jumper across L and 1)
Codes
■ "4b:2" in group "General"/1
■ Effect of the function on the heating cir-
cuit pump:
Coding address "d6" 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 "5E" in group "DHW"/
3.
Power supply for accessories at plug lH (230 V~)
Where the boiler is installed in a wet
area, the power supply connection for
accessories must not be made at the
control unit. If the boiler is installed out-
side wet areas, then the power supply
connection for accessories can be made
directly at the control unit. This connec-
tion is switched directly with the ON/OFF
switch of the control unit.
(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 3 or 4.
■ Effect of the function on the heating cir-
cuit pump:
Coding address "d6" 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 "5E" in group "DHW"/
3.
If the total system current exceeds 6 A,
connect one or more extensions via an
ON/OFF switch directly to the mains sup-
ply (see next chapter).
Installation sequence
B
[{S [{D
DE DE
35