Constant values Δp-c
DI0000094
p/kPa
H/m
6
5
4
3
2
1
0
0
0
40
20
0
0
0.5
1.0
1.5
2.0
2.5
3.0
0.2
0.4
0.6
0.8
Q/m
3
/h
0
0.5
1.0
1.5
2.0
2.5
3.0
Q/m
3
/h
P
1
/W
Q/l/s
Q/lgpm
10
8
6
4
2
60
50
40
30
20
10
0
Changing the pump settings
Note
It is recommended that the pump runs at constant
pressure when used for underfloor heating. The factory
setting of the pump is not set to constant pressure and
must therefore be changed
The pump (Grundfos UMP3) has to be set to the constant pressure
modus (Δp-c) to enable an optimal operation of the underfloor
heating system.
The settings are done on the pump house as described below.
Pump settings
Note
Leave the pump on the selected program. It goes back
into operation automatically and has saved the settings.
Enable
setting
Press
and
hold,
sec
Factory setting
Underfloor
heating
constant
pressure
Step
4
2 x
1
4
3 x
2
4
4 x
3
Pump effect
EEI ≤ 0.20 Part 3
Value
Speed
P
1
[W]
Min.
2
Max.
33
Pump operation
Display view
Operation settings
0 %
≼
P1
≼
25 %
25 %
≼
P1
≼
50 %
50 %
≼
P1
≼
75 %
75 %
≼
P1
≼
100 %
Pump alarms
Display view
Alarm status
Blocked
Low voltage
Electrical fault
Hydraulic balancing on the manifold
Setting the hydraulic balancing
Warning!
The pressure in the valves can cause personal injury.
Caution!
Never turn the valves counter clockwise more than five
(5) turns. When the cap is completely unscrewed, the
valves will shoot out of the thread.
CLOSE
OPEN
0.25 x
1
2
3
4
CD0000301
1.5
l/min
5
1.
Remove the cap from the fill/flush valve on the return manifold
bar. Turn it around until the square connector is down.
2.
Close the valve.
3.
Open the regulation valve
0.25 x
4.
Adjust the regulation valve as many turns as necessary to
achieve desired loop setting.
5.
Consider the planning documentation when adjusting the flow
rate on the relevant top meter.
Combi Port E
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Installation and operation manual
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21
