Viessmann VITODENS 300 Service Instructions Manual page 58
6.6 to 35.0 kw gas fired wall mounted condensing boiler natural gas and lpg version
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Also See for VITODENS 300:
- Service instructions manual (132 pages) ,
- Datasheet (41 pages) ,
- Installation instructions manual (20 pages)
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Coding
Code 2
(cont.)
Coding in
Function mode
the as
delivered
condition
Address:
value
A7:0
*
1
Without mixer econ-
omy function
A8:1
*
1
Heating circuit M2
(mixer circuit) creates a
demand for the internal
circulation pump
A9:7
*
1
With pump idle per-
iod: Heating circuit
pump OFF in case of
set value modification
(by changing the oper-
ating mode or changing
the set room tempera-
ture)
*1
Only for weather-compensated control units.
58
Coding
Possible change
change
Address:
value
A7:1
With mixer economy
function (extended heat-
ing circuit pump logic):
Heating circuit pump also
OFF, if the mixer was
closed for longer than
20 minutes. Heating
pump ON,
&
if the mixer changes to
control mode
or
&
after cylinder loading
(for 20 min.)
or
&
if there is a risk of frost.
A8:0
Heating circuit M2 (mixer
circuit) creates no
demand for the internal
circulation pump
A9:0
*
1
Without pump idle per-
iod
A9:1
With pump idle time,
to
adjustable from 1 to 15
A9:15
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