Viessmann Vitoligno 300-P Service Instructions For Contractors page 48

Codes
Code 1
(cont.)
Coding in the delivered condition
Mixer economy function
A7:0 Without mixer economy
function
Set changeover
A9:7 With pump idle time:
Heating circuit pump
"OFF" in case of set value
modification by changing
the operating mode or
changing the set room
temperature
Room shutdown
B5:5 With remote control:
With room temperature-
dependent heating circuit
pump logic function
Parameter With heating circuit pump logic function:
address B5:... Heating circuit pump "OFF"
1 RT
2 RT
3 RT
4 RT
48
> RT + 5 K
actual set
> RT + 4 K
actual set
> RT + 3 K
actual set
> RT + 2 K
actual set
Possible change
A7:1 With mixer economy func-
tion (extended heating cir-
cuit pump logic):
Heating circuit pump also
"OFF":
The mixer has been closed
for longer than 20 min.
Heating circuit pump
"ON":
■ Mixer changes to control
function
or
■ After cylinder heating (for
20 min)
or
■ If there is a risk of frost
A9:0 Without pump idle time
A9:1 Pump idle time adjustable
to from 1 to 15
A9:15
B5:0 Without room temperature-
dependent heating circuit
pump logic function
B5:1 With room temperature-
to dependent heating circuit
B5:8 pump logic function (see
the following table)
Heating circuit pump "ON"
RT < RT
actual
RT < RT
actual
RT < RT
actual
RT < RT
actual
+ 4 K
set
+ 3 K
set
+ 2 K
set
+ 1 K
set