Start-Up; Functions; Control Modes; Selection Of Control Mode - Grundfos 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.
When the vent screw is slackened, see
fig. 5, scalding hot liquid under high pres-
sure may escape. Care should be taken
to ensure that the escaping liquid does
not cause personal injury or damage to
other components.
Fig. 5
Vent screw
The pump may be noisy, when first switched on, due
to air remaining in the chamber. This noise should
cease after a few minutes running.
After start-up, the desired operating mode and possi-
bly pump head are set.

6. Functions

Some functions can only be selected by means of
the remote control R100. Where and how the differ-
ent settings are made will appear from section
7. Setting the pump.

6.1 Control modes

UPE Series 2000 pumps can be set to the control
mode which is most suitable for the individual sys-
tem.
Two control modes are available:
• Proportional pressure (factory setting),
• Constant pressure.
Proportional-pressure control:
Can be set by means of the control panel or the
R100.
The pump head is reduced at falling water demand
and increased at rising water demand, see fig. 6.
This is the factory setting, as in most cases, this is
the optimum control mode, and at the same time it
consumes the least energy.
8
Constant-pressure control:
Can be set by means of the control panel or the
R100.
The pump maintains a constant pressure, irrespec-
tive of water demand, see fig. 6.
Fig. 6
H H
H
set
H
set
H
set
2
Q
Proportional
pressure

6.2 Selection of control mode

Systems with specified control mode:
If the control mode (proportional or constant pres-
sure) and the pump head have been specified for the
system in which the pump is to be installed, the
pump should be set as specified. See section 7. Set-
ting the pump. If problems should arise, see section
8. Fault finding chart.
Systems with no specified control mode:
If the control mode and the pump head have not
been specified for the system, (for instance, an un-
controlled standard pump is replaced by the UPE
pump), it is advisable to use the settings in the fol-
lowing table and in section 6.2.1 Setting in connec-
tion with pump replacement.
Q
Constant
pressure