Start-Up; Condensed Water In Terminal Box; Functions; Control Modes - Grundfos MAGNA UPE 2000 Series Montage- Und Betriebsanleitung

5. Start-up

Do not start the pump until the system has been
filled with liquid and vented. Furthermore, the re-
quired minimum inlet pressure must be available at
the pump inlet, see section 10. Technical data. The
system cannot be vented through the pump.
As the pump is self-venting, it need not be vented
before start-up.
If the inspection screw is to be slackened,
see fig. 8, care should be taken to ensure
that the escaping, scalding hot liquid does
not cause personal injury or damage to
components.
Fig. 8

5.1 Condensed water in terminal box

To prevent problems with condensed water in the
terminal box, the pump temperature should be ap-
proximately the same as the ambient temperature
before start-up.

6. Functions

Most functions can be selected by means of the
pump control panel. However, some functions can
only be selected via the R100 or via bus.

6.1 Control modes

GRUNDFOS MAGNA pumps can be set to the con-
trol mode which is most suitable for the individual
system.
Three control modes are available:
• AUTO (factory setting),
• Proportional pressure,
• Constant pressure.
Each of the above-mentioned control modes can be
combined with automatic night-time duty, see section
6.3 Automatic night-time duty.
AUTO:
Can be set by means of the control panel or via the
R100, see section 7. Setting the pump.
The control mode AUTO can reduce the pump per-
formance continuously.
8
The setpoint of the pump has been factory-set as fol-
lows and cannot be changed manually:
• MAGNA UPE/UPED 32-120, 40-120 to 6 metres.
• MAGNA UPE/UPED 50-60, 65-60 to 3 metres.
When the pump registers a lower pressure on the
max. curve, A
lects a correspondingly lower control curve, H
thus reducing the energy consumption.
Fig. 9
A :
1
A :
2
Inspection screw
A :
3
H
set1
H
set2
H
max
2
The AUTO function can be reset by pressing the but-
ton
is back to the starting point (AUTO or AUTO with
automatic night-time duty).
Proportional-pressure control:
Can be set by means of the control panel or via the
R100, see section 7. Setting the pump.
The pump head is reduced at falling water demand
and increased at rising water demand, see fig. 10.
Constant-pressure control:
Can be set by means of the control panel or via the
R100, see section 7. Setting the pump.
The pump maintains a constant pressure, irrespec-
tive of water demand, see fig. 10.
Fig. 10
H
H
set
H
set
2
, the AUTO function automatically se-
2
H
max
H H
max set1
2
A H
1
A
A 2
3
Original duty point.
Lower registered pressure on the max.
curve.
New duty point after AUTO control.
: Original setpoint setting.
: New setpoint after AUTO control.
: Factory setting.
for approx. 10 seconds until the control mode
H
H
set
Q
Constant
Proportional
pressure
pressure
,
set2
set2
Control
curves
Q
Q