Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group - Viessmann VITOTRONIC 300 Installation And Service Instructions Manual

Vitotronic 300, GW5B & MW1B Installation and Service

"Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group

Coding
Coding in the factory set condition
Priority DHW heating
A2:2 DHW tank priority applicable to heating circuit
pump and mixing valve.
Economy function outside temperature
A5:5 With heating circuit pump logic function
(economy circuit): Heating circuit pump "OFF"
when the outside temperature (AT) is 1 K
higher than the set room temperature (RT
AT > RT + 1 K
set
Parameter address A5:...
1
2
3
4
5
6
7
to
15
Coding in the factory set condition
Extended economy function mixing valve
A7:0 Only for heating circuits with mixing valve:
Without mixing valve economy function.
Pump idle time, transition reduced mode. Operation
A9:7 With pump idle time (heating circuit pump
"OFF").
(See function description on page 51).
)
set
With heating circuit pump logic function: Heating circuit pump "OFF"
AT > RT + 5 K
set
AT > RT + 4 K
set
AT > RT + 3 K
set
AT > RT + 2 K
set
AT > RT + 1 K
set
AT > RT
set
AT > RT - 1 K
set
AT > RT - 9 K
set
Possible change
A2:0 Without DHW tank priority applicable to
heating circuit pump and mixing valve.
A2:1 DHW tank priority applies only to the
mixing valves.
A5:0 Without heating circuit pump logic
function.
A5:1 With heating circuit pump logic function:
to Heating circuit pump "OFF"; see the
A5:15 following table.
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 closed for
longer than 20 min.
Heating circuit pump "ON":
- If the mixing valve changes to control
function.
- If there is a risk of frost.
A9:0 Without pump idle time.
A9:1 With pump idle time; adjustable from 1 to 15.
to 1: short idle period
A9:15 15: long idle period
Code 1, Vitotronic 300-K
83