Viessmann VITODENS 333 Service Instructions Manual page 56

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 unit.
56
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 minutes)
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