494.5
950
C
38.5
149.5
507.5
600
108
220.5
208.5
128.5
120
B
E FG H
D
A
A
Heating flow
B
Heating return
C
Filling/draining
D
Condensate drain
E
Gas connection
F
Safety valve
G
Cold water
H
DHW
Note
For connection dimensions for surface mounting or flush mounting
with the pre-plumbing jig, see page 71.
Note
The appliance is delivered fitted with a flexible power cable (2.0 m
long). Lay the required power cables on site and route them into the
boiler through the back.
Variable speed heating circuit pump in the Vitodens 222-W
The integral circulation pump is a highly efficient pump with substan-
tially lower power consumption than conventional pumps.
The pump speed and consequently the pump rate are regulated sub-
ject to the outside temperature and the switching times for heating
mode or reduced mode. The control unit transmits the current speed
specifications to the circulation pump via a PWM signal.
The min. and max. speeds and the speed for reduced mode can be
matched to the existing heating system via parameters at the control
unit.
Setting (%) in the heating circuit 1 group:
■ Min. speed: Parameter 1102.0
■ Max. speed: Parameter 1102.1
■ In the delivered condition, the minimum pump rate and the maxi-
mum pump rate are set to the following values:
Rated heating output in kW
Speed settings in the deliv-
ered condition in %
Min. pump rate Max. pump
rate
11
65
65
19
65
75
25
65
90
32
60
100
■ In conjunction with a low loss header, heating water buffer cylinder
and heating circuits with mixer, the internal circulation pump runs
at a constant speed.
Vitodens 222-W
(cont.)
VITODENS
VIESMANN
19
5853906
2
Summary of Contents for Vitodens 200-W B2HE
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