0020213394_05 Installation and maintenance instructions
31
10.2.2.5 Remaining feed head
for VWF 19x/4 building circuit pump at
nominal volume flow
0
50
100
150
200
250
300
350
400
450
500
40
50
60
70
80
90
100
B
A
1
2
3
1
Air heat source
2
Ground heat source
3
Ground water heat
source
A
Remaining feed head in
hPa (mbar)
B
Pump output in %
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 operation, you can adjust
the pump output. The following diagram shows how setting
the pump actuation affects the remaining feed heads at
nominal volume 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
→
Target env. pump val.
menu item.
▶
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
volume flow
0
100
200
300
400
500
600
700
800
40
50
60
70
80
90
100
B
A
1
2
3
1
Air heat source
2
Ground heat source
3
Ground water heat
source
A
Remaining feed head in
hPa (mbar)
B
Pump output in %
10.2.4.2 Remaining feed head for VWF 8x/4
environment circuit pump at nominal
volume flow
0
100
200
300
400
500
600
700
800
40
50
60
70
80
90
100
B
A
1
2
3
1
Air heat source
2
Ground heat source
3
Ground water heat
source
A
Remaining feed head in
hPa (mbar)
B
Pump output in %
10.2.4.3 Remaining feed head for VWF 11x/4
environment circuit pump at nominal
volume flow
0
100
200
300
400
500
600
700
800
40
50
60
70
80
90
100
B
A
1
2
3
1
Air heat source
2
Ground heat source
3
Ground water heat
source
A
Remaining feed head in
hPa (mbar)
B
Pump output in %
