Viessmann VITOCROSSAL Service Instructions Manual page 59

Heating circuit 1, heating circuit 2, heating...
Parameter address With heating circuit pump logic function:
b5:...
Heating circuit pump "OFF"
3 RT
4 RT
5 RT
6 RT
7 RT
8 RT
Coding in the delivered condition
C5:20 Electronic minimum flow tempera-
ture limit 20 °C (only for weather-
compensated control units)
C6:74 Electronic maximum flow tempera-
ture limit 90 °C (only for weather-
compensated control units)
D3:14 Heating curve slope = 1.4
(only for weather-compensated
control units)
D4:0 Heating curve level = 0
(only for weather-compensated
control units)
D5:0 External operating program
changeover switches the operating
program to "Constant operation at
reduced room temperature" or
"Standby mode". (only for weather-
compensated control units)
D6:0 Heating circuit pump remains in
control mode at "External blocking"
signal.
D7:0 Heating circuit pump remains in
control mode at "External demand"
signal.
D8:0 No operating program changeover
via EA1 extension (only for weath-
er-compensated control units)
E1:1 Never adjust.
E2:50 With remote control: No display
correction of the actual room tem-
perature
E5:... Never adjust.
RT + 3 K
>
actual set
RT + 2 K
>
actual set
RT + 1 K
>
actual set
RT
>
actual set
RT - 1 K
>
actual set
RT - 2 K
>
actual set
(cont.)
Heating circuit pump "ON"
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
Possible change
C5:1 Minimum limit adjustable from 1 to
to 127 °C (limited by boiler-specific pa-
C5:127 rameters)
C6:10 Maximum limit adjustable from 10 to
to 127 °C (limited by boiler-specific pa-
C6:127 rameters)
D3:2 Heating curve slope adjustable from
to 0.2 to 3.5 (see page 31)
D3:35
D4:–13 Heating curve level adjustable from
to 13 to 40 (see page 31)
–
D4:40
D5:1 The external operating program
changeover switches to "Continuous
operation with standard room tem-
perature" (subject to coding ad-
dresses 3A, 3B and 3C)
D6:1 Heating circuit pump stops at signal
"External blocking".
D6:2 Heating circuit pump starts at signal
"External blocking".
D7:1 Heating circuit pump stops at signal
"External demand".
D7:2 Heating circuit pump starts at signal
"External demand" (subject to cod-
ing addresses 3A, 3B and 3C)
D8:1 Operating program changeover via
input DE1 at EA1 extension
D8:2 Operating program changeover via
input DE2 at EA1 extension
D8:3 Operating program changeover via
input DE3 at EA1 extension
E2:0 Display correction
to to
E2:49 Display correction
E2:51 Display correction +0.1 K
to to
E2:99 Display correction +4.9 K
Code 2
+ 2 K
+ 1 K
- 1 K
- 2 K
- 3 K
5 K
–
0.1 K
–
59