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5693 982 - 04
Vitotronic 300, GW2B Installation and Service
External Heating Program Changeover
Installation Sequence
Preselected heating program
(Contact open)
Code
Changed heating program
(Contact closed)
9
or
w
or
w
Central heating OFF/
DHW OFF
Central heating OFF/
DHW heating ON
Central heating ON/
DHW heating ON
“d5:0” in the
“Heating circuit...” group
(Factory set condition)
Constant operation with reduced room
temperature/DHW heating OFF
“d5:1” in the “Heating
circuit ...”group
Constant operation with standard
room temperature, DHW heating
in accordance with coding address
“64” in the “DHW” group
Codes
Plug
a
V
D
Extension EA1
Via coding address “91” in the “General” group, the
function can be assigned to the heating circuits.
Set “5d”, “5E” or “5F” in the “General” group to 1.
Via coding address “d8” in the “Heating circuit...”
group, the function can be assigned to the heating circuits.
Optional Connections:
H
Plug
a
V
D
H
Extension EA1 (accessory, see page 127)
Connection
Note:
‘Live’ contacts lead to short circuits or phase
failure. The external connection must be floating.
Plug
a
V
D
Extension EA1
Legend
A
Floating contact
B
Plug
a
V
D
of the control unit
The changeover can be achieved separately for heating
circuits 1 to 3.
Legend
A
Floating contact
B
Extension EA1
