Technical Manual

Technical Data
SCS
BWR
RT
g
a
e
d
c
b
k
h
IO
DHW
DCW/D
f
Overall height
BWS
SCR
*1
119 USG / 450 ltr Tank Legend
IO Inspection and clean-out opening
D Drain
BWR Boiler water return (upper coil)
SCR Solar collector return (lower coil) or
boiler return
BWS Boiler water supply (upper coil)
SCS Solar collector supply (lower coil) or
boiler supply
DCW Domestic cold water
SW1 Sensor well opening for DHW
tank temperature sensor or boiler
controler aquastat
SW2 Sensor well for lower thermometer
at SCS level
DHW Domestic hot water
RT Recirculation tapping
TPV Temperature and pressure relief
valve
*1
For solar heating systems Viessmann
recommends placement of the DHW tank
temperature sensor in the solar collector
return (SCR). This requires a brass elbow
with sensor well (accessory - Part No.
7219 729).
The DHW tank temperature sensor of
the boiler control is placed in SW1.
Overall width
Overall depth
n
m
SW2
*1
SW1
C
Technical Data
6 VITOCELL 300-B
DHW tank temperature sensor
in solar heating applications
119 USG / 450 ltr
DHW tank temperature sensor for solar
application (included with solar
control unit)
Brass elbow with sensor well
Solar collector return connection
Dimensions
Storage
capacity
USG /
ltr
119 /
450
a
b
c
d
e
f
g
h
k
m
n
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
4
1
/
16
103
17
7
/
8
453
31½
802
36
912
39
7
/
8
1012
47
7
/
8
1216
63
1601
20
508
4
100
31½
802
46
1170
5
1
6
7
4
1
5
-
0
1
5
1
6
7
4
1
5
-
0
1