Start-Up; Functions; Control Of Twin-Head Pumps; Control Modes - Grundfos UPED 50-12 Montage- Und Betriebsanleitung

5. Start-up

Do not start the pump until the system has been filled
with liquid and vented. Furthermore, the required
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. 6, care should be taken to ensure
that the escaping, scalding hot liquid does
not cause personal injury or damage to
components.
Fig. 6
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 of twin-head pumps

Factory setting can be changed by means of the
R100.
Twin-head pump
Slave pump
Fig. 7
Four operating modes are available. The selection of
operating mode depends on whether reliability, life-
time or performance has top priority.
1. Alternating operation (factory setting). Pump
operation alternates every 24 hours. A manual
change can be made by reducing the setpoint to
stop. Thereby the time is reset, meaning that the
next change will take place after 24 hours.
130
Inspection screw
Master pump
If the electricity supply to the pump has been
switched off, any of the pumps may start when
the electricity supply is switched on.
Reaction in case of fault. In case of fault in one
pump head, the operational pump head will oper-
ate constantly as a single-head pump.
2. Standby operation. The slave pump is in con-
stant operation. Every 24 hours the master pump
will start up slowly and run for approx. 1 minute to
prevent it from seizing up.
Reaction in case of fault. If the slave pump
stops because of fault, the master pump will
operate constantly as a single-head pump.
3. Synchronous operation. Master and slave
pumps are running at the same motor frequency.
This operating mode is suitable if the flow
requirement exceeds the flow of one pump head.
Reaction in case of fault. In case of fault in one
pump head, the operational pump head will oper-
ate constantly as a single-head pump.
4. Single-pump operation. See supplement to
these instructions.
The other functions mentioned in sections
6.2 Control modes to 6.13 Wireless remote control
are all possible in the three operating modes.

6.2 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. 8.
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.
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. 8.
Control modes
H
H
set
H
set
2
Q
Proportional
pressure
Fig. 8
H
H
set
Constant
Q
pressure