Viessmann VITOCROSSAL Service Instructions Manual page 41

Heating circuit 1, heating circuit 2, heating...
Parameter address A5:...
6
7
to
15
Coding in the delivered condition
Extended economy function adjusted outside temperature
A6:36 Extended economy mode disa-
bled (only for weather-compensa-
ted control units)
Extended economy function mixer
A7:0 Without mixer economy function
(only for weather-compensated
control units and heating circuit
with mixer.)
Pump idle time, transition reduced mode
A9:7 With pump idle time: Heating cir-
cuit pump "OFF" if the set value is
altered through a change in oper-
ating mode or through a change in
the set room temperature (only for
weather-compensated control
units)
Weather-compensated/room temperature hook-up
B0:0 With remote control: Heating
mode/reduced mode: Weather-
compensated (only for weather-
compensated control units).
Change code only for the heating
circuit with mixer.
Economy function room temperature
B5:0 With remote control: No room tem-
perature-dependent heating circuit
pump logic function (only for
weather-compensated control
units). Change code only for the
heating circuit with mixer.
(cont.)
With heating circuit pump logic function: Heating circuit pump "OFF"
OT RT
>
set
OT RT - 1 K
>
set
OT RT - 9 K
>
set
Possible change
A6:5
to
A6:35
A7:1
A9:0
A9:1
to
A9:15
B0:1
B0:2
B0:3
B5:1
to
B5:8
Extended economy mode enabled:
The burner and heating circuit pump
are switched off at a variable value,
adjustable from 5 to 35 °C plus 1 °C.
Mixer will be closed. The basis for
this is the adjusted outside tempera-
ture. This is composed of the actual
outside temperature and a time con-
stant that takes account of the way
an average building cools down.
With mixer economy function (exten-
ded heating circuit pump logic):
Heating circuit pump also "OFF":
If the mixer has been trying to
■
close for longer than 20 min.
Heating circuit pump "ON":
If the mixer changes to control
■
function
If there is a risk of frost
■
Without pump idle time
With pump idle time, adjustable from
1 to 15. The higher the value, the
longer the pump idle time
Heating mode: Weather-compensa-
ted
Reduced mode: With room tempera-
ture hook-up
Heating mode: With room tempera-
ture hook-up
Reduced mode: Weather-compen-
sated
Heating mode/reduced mode: With
room temperature hook-up
For heating circuit pump logic func-
tion, see the following table:
Code 1
41