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8. Start up
8.1 System filling - Venting
CAUTION! Possible damage of the pump!
Never operate the pump dry.
The system must be filled before starting the
pump.
8.1.1 Air evacuation process – Pump under pres-
sure (Fig. 2)
- Close the two guard valves (2, 3).
- Unscrew the venting plug (5).
- Slowly open the guard valve on the suction side (2)
and completely fill the pump.
- Retighten the venting plug when air escapes and
the pumped liquid flows (5).
WARNING!
When the pumped liquid is hot and the pressure
high, the stream escaping at the air bleed screw
may cause burns or other injuries.
8.1.2 Air evacuation process – Pump in suction
(Fig. 1)
1st case (Fig. 5.1)
- Close the discharge valve (3), open the suction
valve (2).
- Remove the venting plug (5).
- Unscrew about 4 turns the bottom drain-priming
plug (6) located on the pump casing.
- Put a funnel into the venting plug port and com-
pletely fill the pump and the suction pipe.
- After water flows out and total air exits, filling is
achieved.
- Screw the venting plug and the bottom drain-
priming plug back in.
2nd case (Fig. 5.2)
- Filling can be made easier by fitting a vertical
pipe [14] fitted with a Ø ½" stopcock and a fun-
nel, on the suction pipe of the pump.
NOTE: The length of the pipe must be at least
50mm higher than the venting plug level.
- Close the discharge valve (3), open the suction
valve (2).
- Open the stopcock (14) and the venting device
(5).
- Unscrew about 4 turns the drain-priming plug
(6).
- Completely fill the pump and the suction pipe
until water flows out of the venting plug (5).
- Close the stopcock (14) (which can be left in
place), remove the pipe, close the venting device
(5) and screw again the drain-priming plug (6).
WARNING!
When the pumped liquid is hot and the pressure
high, the stream escaping at the air bleed screw
may cause burns or other injuries.
42
CAUTION! Risk of misuse!
Pump in load and in « Constant pressure » or «
Variable pressure » mode, the detection at zero
flow can not run.
Set the non-return valve before the pressure
sensor (i.e. at pump suction if the sensor is
mounted on this one – Fig.6).
8.2 Starting up
CAUTION! Possible damage of the pump!
The pump must not operate at zero flow (closed
discharge valve) for more than 10 minutes with
cold water (T°C < 40°C) and more than 5 minutes
beyond 60° C.
WARNING! Risk of injury!
When the pump runs, coupling guards must be in
place, tightened with all appropriate screws.
WARNING! Danger of burn!
Depending on conveyed fluid and the operating
cycles of the pump, surface temperature (pump,
motor) can exceed 68°C.
Take necessary means to avoid injuries.
WARNING! Important noise!
Noise emitted by most powerful pumps could be
very high : protection must be used in case of long
stay close to the pump.
WARNING!
Installation must be designed in order that no one
could be hurt in case of fluid leakage (mechanical
seal failure ...).
- We recommend to ensure a minimum flow of
about 10 % of the pump nominal flow to avoid
any vapour lock at the top of the pump.
- Keep the discharge valve closed.
- Start the pump.
- Open draining plug to drain air. If no water leaks
within 20s, close the plug and stop the pump,
then wait for 20s to allow the settling of the air.
- Start again the pump.
NOTE: If necessary (particularly if the suction
height exceeds 5 m) repeat these operations.
- Check that the current input does not exceed
the value indicated on the motor-converter data
plate.
- If water leaks at draining plug (it means the
pump delivers its pressure), slowly open the dis-
charge valve. The pump has to be primed.
- Check pressure stability at discharge with a
manometer, if instability, perfect air draining.
- In case of failure, do the filling in again and start
the operation again.
- To perfect air draining, close the discharge valve
and the draining plug, then stop the pump 20s,
start the pump again and open the draining plug.
Do it as long as air comes out.
- Open the discharge valve in order to have the
wished working point.
- Check that the current input does not exceed
the value indicated on the identification sticker
of the pump.
POMPES SALMSON 05/2013
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