19
ELRO
®
Pumps for hazardous materials GUP 3-1,5 and GP 20/10Ex
4.2.1 Connecting the pump to the
electric power supply
The pump is connected to the electric power
supply by means of a mains plug (see also
Fig. 12).
Before plugging in the mains
plug check whether the
operating voltage complies
with the specification on the
identification plate.
Plug the equipment plug into the appropriate
socket.
4.2.2 Switching the pump on and off
n
Button 2 or 3 – press to switch on pump
in speed stage I or II.
n
Button 1 (Off-switch) – press to switch
off the pump.
n
From speed stage I you can press
button 3 to change directly to the higher
speed stage II.
Note:
If the operating voltage fails during operation
the pump control prevents an automatic
restarting of the pump after the operating
voltage has been re-established.
The pump must be switched on by pressing
button 2 or 3.
4.2.3 Commissioning
The vacuum gauge mounted to the pump
housing shows the vacuum on the suction
side. After a short time running the vacuum
gauge should indicate vacuum. If no
vacuum is reached, check the pump for leak
tightness (see chapter maintenance and
troubleshooting).
The flow rate can be regulated with the
dosing valve on the front side of the pump
(see Fig. 1 in the chapter "General").
Start the pump only when
wearing your personal
protective outfit.
4.2.4 Use of the pulsation damper
The pulsation damper is fixed with a bracket
to the top of the pump (Fig. 12).
When used with high pressures – max. 1.5
bar (long hoses) – it is recommended to
mount the pulsation damper to the pressure
side of the pump (T-fitting with blanking
cap).
1 Pulsation damper in transport bracket
2 T-fitting with blanking cap (for installation
of pulsation damper)
3
Mains plug
Fig. 12
For this purpose unscrew the pulsation
damper from the transport bracket by
turning it anti-clockwise. Remove the
blanking cap from the T-fitting port pointing
upward.
Attention!
Warning!
1
2
3
