Wilo -MVISE-2G Betriebsanleitung Seite 28

English
6. STARTING UP
6.1 Preliminary rinsing
Each of our pumps is tested regarding hydraulic
features in factory, some water may remain in
them.
It is recommended for hygiene purposes, to carry
out a rinsing of the pump before any using with
potable water supply.
6.2 Filling - venting
CAUTION ! Never operate the pump dry, even
briefly.
- Close the discharge valve (2),
- Open the venting plug (4), the suction valve (1)
and completely fill the pump.
Close the venting plug only after water flows out
and complete aeration.
WARNIG ! Beware of scalding !
In hot water, a stream of water may escape
from the venting plug port. Take all required
precautions as regards persons and motor-
converter.
WARNIG ! Avoid touching the pump owing to
the risk of burning! Depending on the operating
condition of the pump and/or installation (fluid
temperature, volume flow) the entire pump
including the motor can become very hot.
CAUTION ! Operating in pressure regulation
mode :
MODE 2 to ensure the detection of zero flow,
set the non-return valve before the pressure
sensor (fig. 2).
6.3 Starting up
WARNING ! Depending on conveyed fluid and
operating cycles of the pump, surface tempera-
ture (pump, motor) can exceed 68°C. Take
necessary means to avoid injuries.
CAUTION ! The pump must not run at zero flow
(closed discharge valve).
To ensure an adequate cooling of the motor-
converter, the pump must not run with a flow
lower than 0,3 m3/h and a flow bigger to maxi-
mum speed than :
- 5,5m3/h for MVISE/Multi-VSE2xx
- 8m3/h for MVISE/Multi-VSE4xx
- 14m3/h for MVISE/Multi-VSE8xx
28
See curves for intermediate speeds.
H(m)
n=100%
0
0 0,3
- If the pump is operating at high back-pressure,
unscrew the venting device a few turns to com-
plete venting until water flows out.
- Open the discharge valve to start the pump.
- Check pressure stability at discharge with a
manometer, if instability, perfect air draining.
- Adjust the discharge valve in order to have the
wished working point.
- Check that the current input does not exceed
the value indicated on the pump data plate.
- Perfect air draining : open the venting plug and
close it only after water flows out and complete
aeration.
Q
MAXI
Q (m3/h)
WILO AG 06/2008