Operation
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Operation
Drain the screw-down valves
Open the valves beyond the spindle limit.
► Pull spindle limit and open valves to the stop.
The valves are fully open.
The water held inside is automatically expelled.
► Re-close the valves.
The screw-down valves are drained.
► Open the screw-down valves half a revolution in order to relieve the
seals.
Suck priming pump dry
The priming pump may only be sucked dry after the complete drainage of
the pump unit.
► Open drain pumpvalve in order to produce no negative pressure in the
pump unit.
► Adjust the engine speed to a higher idling speed.
Higher idling speed 2000 min
-1
.
► Actuate and hold the Priming pump function switch, to activate the
priming pump.
The priming pump will be sucked dry.
► Suck priming pump dry for approx. 30 seconds.
►Actuate Priming pump function switch, to deactivate the priming pump.
The priming pump is sucked dry.
► After the dry suction all valves must be closed and the blank caps con-
nected.
Leak testing
The leak testing should be done every 3 months, after a complete drainage
of the portable pump.
► Close all valves of the pump unit.
► Close the water external drafting connection with blank cap.
When checking suction hoses, connect them and close the end
with a blank cap.
►Actuate Priming pump function switch, to activate the priming pump.
► Run the priming pump until a vacuum of approx. 0.8 bar (11.6 psi) has
built up.
►Actuate Priming pump function switch, to deactivate the priming pump.
► The pump is tight enough, if the vacuum does not drop more than 0.1
bar (1.5 psi) within one minute.
If 0.8 bar (11.6 psi) cannot be reached, the pump should be pres-
sure tested. A pressure of 3-6 bar (44-87 psi) connected to the
suction inlet is sufficient.
The leak check is carried out.
► Release vacuum after the leak check.
► Briefly open pressure outlet or drain.
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