Viessmann D2RA, Installation Instructions For Contractors

Page: 84 / 164

84
Coding in the delivered condition Possible change
b2:8 With remote control and for the
heating circuit, operation with room
temperature hook-up must be pro-
grammed: room influence factor 8
(only change the code for the heat-
ing circuit with mixer) b2:0 Without room influence
b2:1
to
b2:64 Room influence factor adjustable
from 1 to 64. The higher the value,
the greater the room influence.
b5:0 With remote control: no room tem-
perature-dependent heating circuit
pump logic function (change code
only for heating circuit with mixer) b5:1
to
b5:8 For heating circuit pump logic func-
tion, see the following table:
Parameter address
b5:... With heating circuit pump logic function:
Heating circuit pump "OFF"
Heating circuit pump "ON"
1 RT
actual
> RT
set
+ 5 K RT
actual
< RT
set
+ 4 K
2 RT
actual
> RT
set
+ 4 K RT
actual
< RT
set
+ 3 K
3 RT
actual
> RT
set
+ 3 K RT
actual
< RT
set
+ 2 K
4 RT
actual
> RT
set
+ 2 K RT
actual
< RT
set
+ 1 K
5 RT
actual
> RT
set
+ 1 K RT
actual
< RT
set
6 RT
actual
> RT
set
RT
actual
< RT
set
–
1 K
7 RT
actual
> RT
set
–
1 K RT
actual
< RT
set
–
2 K
8 RT
actual
> RT
set
–
2 K RT
actual
< RT
set
–
3 K
Coding in the delivered condition Possible change
C5:20 Electronic minimum flow tempera-
ture limit 20 °C C5:1
to
C5:127 Minimum limit adjustable from 1 to
127 °C (limited by appliance-specific
parameters)
C6:74 Electronic maximum flow tempera-
ture limit set to 74 °C C6:10
to
C6:127 Maximum limit adjustable from 10 to
127 °C (limited by appliance-specific
parameters)
d3:8 Heating curve slope = 0.8 d3:2
to
d3:35 Heating curve slope adjustable from
0.2 to 3.5 (see page 59)
d4:0 Heating curve level = 0 d4:–13
to
d4:40 Heating curve level adjustable from
–
13 to 40 (see page 59)
d5:0 External operating program
changeover switches the operating
program to "Constant operation at
reduced room temperature" or
"Standby mode" d5:1 The external operating program
changeover switches to "Constant
operation at standard room tempera-
ture" (subject to coding addresses
"3A", "3b" and "3C")
d6:0 Heating circuit pump stays in con-
trol mode at "External blocking"
signal. d6:1 Heating circuit pump stops at "Exter-
nal blocking" signal (subject to cod-
ing addresses "3A", "3b" and "3C")
d6:2 Heating circuit pump starts at "Exter-
nal blocking" signal (subject to cod-
ing addresses "3A", "3b" and "3C")
d7:0 Heating circuit pump stays in con-
trol mode at "External demand"
signal. d7:1 Heating circuit pump stops at "Exter-
nal demand" signal (subject to cod-
ing addresses "3A", "3b" and "3C")
Code 2
"Heating circuit"
(cont.)
5678 044 GB
Codes