11
Vitotrans 222 (up to 240 kW) - circulation pump, heating water side
2
5
8
1
4
8
A
Variable differential pressure
B
Constant differential pressure
2
5
8
1
4
8
240 kW setting
Vitotrans 222, up to 240 kW
A
E
B
C
D
3.0
6.0
9.0
10
20
30
40
50
60
70
80
90
100
100
200
300
400
500
600
700
800
900
1000
0
mbar
kPa 0
0
Flow rate in m³/h
Pressure drop/head
1.0 2.0
4.0 5.0
7.0 8.0
Fig.6
A
Pressure drop Vitotrans 222, up to 240 kW
B
Residual head
C
Min. output
D
Max. output
E
Heating water volume at T
F
/T
R
75/35 °C and max.
transferable heating output up to
240 kW = 5160 l/h,
Δ
p = 250 mbar (25 kPa)
Setting the cylinder temperature
Vitotrans 222 for constant flow temperatures
The upper cylinder temperature controller starts cylin-
der heating, while the lower cylinder temperature con-
troller stops cylinder heating.
1.
Limit the upper cylinder temperature controller to at
least 5
º
C below the actual heating temperature.
Example:
Heating temperature 60
º
C, maximum setting of the
upper cylinder temperature controller 55
º
C.
Commissioning, inspection, maintenance
Setting the pumps
(cont.)
5549 892 GB
