Viessmann VITODENS 222-F Service Instructions Manual page 46

Code 1
Heating Circuit 1, 2 and 3
Coding in the factory setting
Extended economy function mixing valve
A7:0
Pump idle time, transition reduced mode
A9:7
Room temperature hook-up
B0:0
Economy function room temperature
B5:0
Parameter address
B5:...
1
2
3
4
5
6
7
8
46
(continued)
Without mixing valve economy
function
With pump idle time:
Heating circuit pump "OFF" if
the set value is altered through
a change in operating mode or
through a change in the set room
temperature
Only with heating circuit with
mixing valve and remote control.
Heating mode and reduced mode.
With remote control: No room
temperature dependent heating
circuit pump logic function
With heating circuit pump logic function:
Heating circuit pump "OFF"
RTactual > RTset + 5 K
RTactual > RTset + 4 K
RTactual > RTset + 3 K
RTactual > RTset + 2 K
RTactual > RTset + 1 K
RTactual > RTset
RTactual > RTset - 1 K
RTactual > RTset - 2 K
Vitodens 222-F B2TA 19 and 35 Service
Possible change
A7:1 With mixing valve economy
function (extended heating circuit
pump logic): Heating circuit
pump also "OFF":
- If the mixing valve has been
- If the mixing valve changes to
- If there is a risk of frost.
A9:0 Without pump idle time
A9:1 With pump idle time, adjustable
to from 1 to 15.
A9:15 1= Short idle period
2= Long idle period
B0:1 Heating mode: weather-
compensated Reduced mode:
with room temperature hook-up.
B0:2 Heating mode: with room
temperature hook-up Reduced
mode.
B0:3 Heating mode/reduced mode:
with room temperature hook-up.
B5:1 Heating circuit pump logic
to function, see the following table:
B5:8
Heating circuit pump "ON"
RTactual < RTset + 4 K
RTactual < RTset + 3 K
RTactual < RTset + 2 K
RTactual < RTset + 1 K
RTactual < RTset
RTactual < RTset - 1 K
RTactual < RTset - 2 K
RTactual < RTset - 3 K
closed for longer than 20
minutes.
Heating circuit pump "ON":
control function.