Filling - Bleeding - Wilo -Economy MHIE 1 Instrucciones De Instalación Y Funcionamiento

English
6 Commissioning
If the pump is supplied separately, i.e. if
ATTENTION!
it is not integrated in a system that has
been mounted by us, then the config-
uration type at the time of delivery is
Mode 1.
6.1 Settings
- In manual mode: Mode 1 (see Figs. 1, 2).
The duty point of the pump is reached with the
aid of the potentiometer (see Fig. 9, Pos. 19) by
setting the speed of the motor between 40% and
100% of the maximum speed.
We recommend adjusting the potentiometer at
mid-range position for commissioning.
- The pump can be brought to a standstill (fre-
quency converter under tension) with the remote
control unit (switch).
- In pressure regulation operating mode: Mode 2
(see Figs. 6, 7, 8).
It is possible to regulate the pressure of the
pump through the addition of a pressure sensor
and a diaphragm pressure vessel. The sensor
must exhibit an accuracy of <1% and be used in
a range between 30% and 100% of its measure-
ment range; the reservoir has a useable volume
of at least 8 litres.
No water in the diaphragm pressure vessel.
Pump up the diaphragm pressure vessel to a
pressure that is 0.3 bar less than the control
pressure of the pump (diaphragm pressure ves-
sel and sensor kit included as accessories in the
scope of delivery).
The setpoint for the pressure regulation is speci-
fied in two types:
• The setting of the potentiometer indicates for
the setpoint for a value between 10 and 100%
of the measurement range of the sensor. We
recommend that the potentiometer be set to
maximum for commisioning.
• An external signal can be connected (0-10 V
or 0-20 mA) for setting the setpoint by remote
control (see Chapter 5.3 - Electrical connec-
tions).
NOTE: The function «Detection of zero volume
flow» makes it possible to stop the pump.
- Via external control per frequency: Mode 3 (see
Fig. 10).
The potentiometer has no function in Mode 3, but
it must nonetheless be set to 100%. The pump is
controlled by an external signal.
Specifications concerning commissioning: see
instruction manual for the pressure boosting sys-
tem.
During normal operation, the status of the LEDs
is as follows: (see Fig. 9, Pos. 17 + 18)
Status of the LEDs
Frequency converter voltage
load/pump in operation
Frequency converter voltage
load/pump in standstill
26
green LED red LED
on off
on off
6.2 Preparatory flushing
Because our pumps are hydraulically tested in
the factory, it is possible that there is still water
in their interiors. For reasons of hygiene, it is
therefore recommended that they be flushed
out prior to use in a potable water network.

6.3 Filling - bleeding

Never permit the pump to run dry, not
ATTENTION!
even for a brief moment.
Pump in intake mode (see Fig. 2)
- Close the stop valve on the pressure side (Pos. 3),
open the inlet/bleeder screw (Pos. 5).
- Gradually open the valve that is located on the
pipework at the entry to the pump (Pos. 2)
and carry out the complete filling of the pump.
Retighten the screw firmly after water begins to
emerge and ventilation is complete.
Danger of injury to personnel!
A jet of water can escape from the ventilation
opening when hot water is being pumped.
Initiate all necessary precautionary measures to
ensure that personnel and the motor/frequency
converter are protected!
Pump in suction mode (see Fig. 1) Two different
cases are possible.
1st case (see Fig. 4.1)
- Close the stop valve on the pressure side
(see Fig. 1, Pos. 3).
- Open the stop valve on suction side (see Fig. 1,
Pos. 2).
- Unscrew the inlet/bleeder screw (see Fig. 1, Pos. 5),
that is located on the pump housing.
- Fill the pump and suction line completely with the
aid of a funnel inserted into the opening.
- The filling procedure is finished when water
escapes and ventilation is complete.
- Screw the inlet/bleeder screw back on.
2nd case (see Fig. 4.2)
The filling can be made easier if a pipe equipped
with a cock (Pos. 12) Ø 1/2» and a funnel
is mounted perpendicularly on the suction line
of the pump.
- Close the stop valve on the pressure side
(see Fig. 1, Pos. 3).
- Open the stop valve on suction side (see Fig. 1,
Pos. 2).
- Open cock (see Fig. 4, Pos. 12) and inlet/bleeder
screw (see Fig. 1, Pos. 5).
- Fill pump and suction line completely, until bub-
ble-free water escapes from the filling opening.
- Close the cock (see Fig. 4, Pos. 12) (it can remain
mounted on the pipe), remove the pipe and screw
the inlet/bleeder screw back in.
WILO SE 09/2021