Vaillant flexoTHERM exclusive VWF 117/4 Installation And Maintenance Instructions Manual page 32

10 Adapting the unit to the heating installation
10.2.2.5 Remaining feed head for VWF 19x/4
building circuit pump at nominal flow
A
500
450
400
350
300
250
200
150
100
50
0
40 50 60
1 Air heat source
2 Ground heat source
3 Groundwater heat
source
10.2.3 Setting the environment circuit pump
If the heat source temperature spread lies below 2 K due to
low pressure losses (large pipe cross-sections, small drilling
depth, with air as the heat source: Short distance to the
air/brine collector) in continuous mode, you can adjust the
pump output. The following diagram shows how setting the
pump actuation affects the remaining feed heads at nominal
flows for a heat source temperature spread of 3 K.
The factory setting on the environment circuit pump depends
on the environment circuit type set and the output range.
▶
Navigate to the Menu → Installer level → Configuration
→ Env. pump target val. menu point.
▶
If necessary, change the factory setting and confirm by
pressing .
10.2.4 Remaining feed head of environment circuit
pump
10.2.4.1 Remaining feed head for VWF 5x/4
environment circuit pump at nominal flow
A
800
700
600
1
500
400
300
200
100
0
40 50 60
1 Air heat source
32
2
1
3
70 80 90 100
A Remaining feed head in
hPa (mbar)
B Pump output in %
2
3
70 80 90 100
2 Ground heat source
Installation and maintenance instructions flexoTHERM exclusive 0020213394_01
3 Groundwater heat
source
A Remaining feed head in
hPa (mbar)
10.2.4.2 Remaining feed head for VWF 8x/4
environment circuit pump at nominal flow
A
800
700
600
1
500
400
B
300
200
100
0
40 50
1 Air heat source
2 Ground heat source
3 Groundwater heat
source
10.2.4.3 Remaining feed head for VWF 11x/4
environment circuit pump at nominal flow
A
800
700
1
600
500
400
300
200
100
0
40 50
1 Air heat source
2 Ground heat source
3 Groundwater heat
source
B
B Pump output in %
2
3
60 70 80 90
A Remaining feed head in
hPa (mbar)
B Pump output in %
2
3
60 70 80 90
A Remaining feed head in
hPa (mbar)
B Pump output in %
B
100
B
100