Viessmann Vitotronic 11 CC1E, Инструкция по установке и обслуживанию

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47
External demand via switching contacts
!
Please note
Live contacts lead to short circuits or phase fail-
ure.
The external connection
must be potential-
free .
Two-stage burner
Function
External demand, burner
stage 1
External demand, burner
stages 1 and 2
Enable boiler, butterfly
valve
Connection Plug
aVD
.1/
aVD
.2 Plug
aVD
.2/
aVD
.3
aVH
.2/
aVH
.3
143
A
B
2 3 1
A
Floating contact
B
To the control unit
143
A
B
2 3 1
A
Floating contact
B
Plug
aVD
of the control
unit
146
A
B
2 3 1
A
Floating contact
B
Plug
aVH
of the control
unit
Contact
■
Closed
■
Burner stage 1 is switched
on.
■
Burner stage 2 is switched
on only for maintaining the
minimum temperature.
■
The boiler water tempera-
ture is restricted by the
electronic maximum tem-
perature limiter if this limit-
er is set below the level of
the mechanical tempera-
ture controller.
■
Burner stages 1 and 2 are
switched on.
■
The boiler water tempera-
ture is restricted by the
electronic maximum tem-
perature limiter if this limit-
er is set below the level of
the mechanical tempera-
ture controller.
■
Burner stage 2 is switched
off 2 K below the maxi-
mum temperature.
■
Vitocrossal:
The butterfly valve opens.
■
Low temperature boiler:
Initially, the preheat func-
tion for lag boilers is activa-
ted.
After the preheat function
has expired, the minimum
boiler water temperature is
maintained.
The butterfly valve opens.
■
Open Burner stage 1 is switched
off. Burner stages 1 and 2 are
switched off.
■
The butterfly valve is
closed after approx. 5 min.
■
External burner start not
possible
■
Boiler is not held at its min-
imum temperature.
Parameter
— — ■
Note parameter "2B" in the
"Boiler" group.
■
Note parameter "2C" in the
"Boiler" group.
External functions — multi boiler system
Connecting the external control unit
(cont.)
5863679
Installation