Viessmann D2RA, Installation Instructions For Contractors

Page: 82 / 164

82
Select "Heating circuit ..." (see page 71).
Coding
Coding in the delivered condition Possible change
A0:0 Without remote control A0:1 With Vitotrol 200-A/200-RF (auto-
matic recognition)
A0:2 With Vitotrol 300-A/300-RF or
Vitocomfort 200 (automatic recogni-
tion)
A1:0 All settings available on the remote
control can be carried out. A1:1 Only party mode can be set at the
remote control (only for Vitotrol 200)
A3:2 Outside temperature below 1 °C:
secondary pump and heating cir-
cuit pump "ON"
Outside temperature above 3 °C:
heating circuit pump "OFF" A3:–9
to
A3:15 Heating circuit pump "ON/OFF" (see
the following table)
!
Please note
If a value below 1 °C is selected, pipes outside the thermal envelope of the building could freeze up.
Use settings below 1 °C only if pipes are equipped with appropriate thermal insulation.
Parameter Heating circuit pump
address A3:... "ON" "OFF"
–
9
–
10 °C
–
8 °C
–
8
–
9 °C
–
7 °C
–
7
–
8 °C
–
6 °C
–
6
–
7 °C
–
5 °C
–
5
–
6 °C
–
4 °C
–
4
–
5 °C
–
3 °C
–
3
–
4 °C
–
2 °C
–
2
–
3 °C
–
1 °C
–
1
–
2 °C 0 °C
0
–
1 °C 1 °C
1 0 °C 2 °C
2
to 1 °C
to 3 °C
to
15 14 °C 16 °C
Coding in the delivered condition Possible change
A4:0 With frost protection A4:1 No frost protection. Adjustment only
possible if code "A3:
–
9" has been
set.
Note
"Important": Observe for code "A3"
A5:5 With heating circuit pump logic
function (economy control): Heat-
ing circuit pump is "OFF" when the
outside temperature (OT) is 1 K
higher than the set room tempera-
ture (RT
set
)
A5:0 Without heating circuit pump logic
function
A5:1
to
A5:15 With heating circuit pump logic func-
tion: heating circuit pump "OFF"
(see the following table)
Code 2
"Heating circuit"
5678 044 GB
Codes