Viessmann Vitodens 300-W Technical Manual page 19

Vitodens 222-W
(cont.)
497
HV HR GA KW
E
A
SIV
300
420
520
600
Condensate drain
A
Height in combination with balanced flue bend 60/100. In combi-
B
nation with balanced flue inspection bend 60/100, the height is
reduced by 10 mm.
E Drain
Rated heating output
kW
13 and 19
26 and 35
Note
For connection dimensions for installation on finished walls with pre-
plumbing jig, see page 68.
For connection dimensions for installation on unfinished walls with
pre-plumbing jig, see page 69.
Note
Lay all required supply cables on site and route them into the boiler
at the point indicated (see page).
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 or
reduced mode. The control unit transmits the current default settings
to the circulation pump via an internal data bus.
VITODENS
a
WW A
35
92
172
Dim. a
mm
B
480
GA Gas connection
HR Heating return
HV Heating flow
KW Cold water
SIV Safety valve on the DHW side
WW DHW
Finished wall
143
168
HV HV HR GA
The control unit codes can be used to match the minimum and maxi-
mum speeds and the speed for reduced mode to the existing heating
system.
In the delivered condition, the minimum pump rate (coding address
"E7") and the maximum pump rate (coding address "E6") are set to
the following values:
KW WW
VIESMANN
2
19