Adapting the unit to the heating installation 8
0020186710_06 ecoTEC exclusive Installation and maintenance instructions
23
8.4
Setting the hydraulic operating mode
▶
Navigate to
Menu
→
Installer level
→
Diagnostics menu
→
D.130 Hydraulic operating mode
and confirm by
pressing
.
▶
If required, set the hydraulic mode and confirm by press-
ing
.
If you have installed a low loss header in the heating installa-
tion, adjust the speed regulation and set the pump output to
a fixed value.
8.4.1
Pump characteristics
Differential pressure specified under diagnostics code
D.122
.
Factory setting: 200 hPa.
8.4.1.1 VC 156/5-7 pump characteristic
200
100
300 400 500 600 700 800 900 1000 1100 1200
0
0
50
100
150
200
250
300
350
400
450
B
A
A
Constant pressure regu-
lation for the differential
pressure level
D.122
[hPa (mbar)], factory
setting marked
B
System volume flow
[l/hr], nominal volume
flow [20 K] marked
8.4.1.2 VC 216/5-7 pump characteristic
200
100
300
400
500
600
700
800
900
1000
1100
1300
1200
0
0
50
100
150
200
250
300
350
400
450
B
A
A
Constant pressure regu-
lation for the differential
pressure level
D.122
[hPa (mbar)], factory
setting marked
B
System volume flow
[l/hr], nominal volume
flow [20 K] marked
8.4.1.3 VC 246/5-7, 276/5-7 pump characteristic
200
100
300
400
500
600
700
800
900
1000
1100
1300
1200
1400
0
0
50
100
150
200
250
300
350
400
450
B
A
A
Constant pressure regu-
lation for the differential
pressure level
D.122
[hPa (mbar)], factory
setting marked
B
System volume flow
[l/hr], nominal volume
flow [20 K] marked
8.4.1.4 VC 326/5-7 pump characteristic
200
100
300
400
500
600
700
800
900
1000
1100
1300 1500
1200
1400
0
0
50
100
150
200
250
300
350
400
450
B
A
A
Constant pressure regu-
lation for the differential
pressure level
D.122
[hPa (mbar)], factory
setting marked
B
System volume flow
[l/hr], nominal volume
flow [20 K] marked
8.5
Hydraulic check
The hydraulic check is used to determine the relevant vari-
ables for differential pressure and volume flow and may, as
a result, be used to check the pipe network in the heating
installation or to support the hydraulic balancing. After spe-
cifying a pressure level between 100 and 400 mbar, the in-
ternal pump is actuated at the target differential pressure.
If the target pressure has been reached, the display shows
the volume flow that is to be set for the current status of
the heating installation. Conversely, the required differen-
tial pressure can be determined for the required volume flow.
▶
Navigate to
Menu
→
Installer level
→
Test programs
→
Hydraulic check
and confirm by pressing
.
