D39489-BA-PM-EN.pdf - 第26页
26 D39489 | Date 12/2019 Diaphragm pump PJ25481 - 950.50.1 8 Operation Translation of origina l Installat ion Instructions , english , KNF 125530 - 31 6634 06/18 15 7. Oper ation 7.1. I nitial start - up Operational r eq…
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D39489 | Date 12/2019
Installation and connection Diaphragm pump PJ25481-950.50.18
14 Translation of original Installation Instructions, english, KNF 125530-316634 06/18
Connecting pump
A marking on the pump head shows the direction of flow.
Confusion between suction and pressure sides can lead to
breakage of connected components on the suction and pres-
sure sides.
1. Remove the protective plugs from the hose connection
threads.
2. Connect the suction line and pressure line (see Chapter 4,
Tab. 7 for mounting dimensions).
3. Lay the suction and pressure line at a downward angle to pre-
vent condensate from running into the pump.
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D39489 | Date 12/2019
Diaphragm pump PJ25481-950.50.18 Operation
Translation of original Installation Instructions, english, KNF 125530-316634 06/18 15
7. Operation
7.1. Initial start-up
Operational requirements
Pump
All hoses attached properly.
Fan openings not blocked.
Specifications of the power supply corre-
spond with the data on the pump’s type plate.
Ensure that the pump outlet is not closed or
constricted.
Tab. 8
7.2. Start up
WARNING
Danger of burns from hot pump parts or hot medium
During or after operation of the pump, some pump
parts may be hot.
Allow the pump to cool after operation.
Take safety precautions against the contact of
hot parts/media.
WARNING
Injury of the eyes
During excessive approach to the inlet or outlet of
the pump, the eyes could be injured by the upcoming
vacuum or overpressure.
Don’t look into the pump’s inlet or outlet during
the operation.
Only operate the pumps under the operating parameters and
conditions described in Chapter 4. Technical Data.
Make sure the pumps are used properly (see Chapter 2.1).
Make sure the pumps are not used improperly (see Chapter
2.2).
Observe the safety precautions (see Chapter 3).
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D39489 | Date 12/2019
Operation Diaphragm pump PJ25481-950.50.18
16 Translation of original Installation Instructions, english, KNF 125530-316634 06/18
WARNING
Hazard of the pump head bursting due to excessive
pressure increase
Do not exceed max. permissible operating pres-
sure (see Chapter 4. Technical Data.
Monitor pressure during operation.
If the pressure exceeds the maximum permissi-
ble operating pressure, immediately switch off
pump and eliminate fault (see Chapter
9. Trou-
bleshooting).
Only throttle or regulate the air or gas quantity in
the suction line to prevent the maximum permis-
sible operating pressure from being exceeded.
If the air or gas quantity in the pressure line is
throttled or regulated, make sure that the maxi-
mum permissible operating pressure is not ex-
ceeded.
Ensure that the pump outlet is not closed or con-
stricted.
Excessive pressure (with all of the related hazards) can be pre-
vented by placing a bypass line with a pressure
-relief valve be-
tween the pressure and suctions sides of the pump. For further
information, contact our technical adviser (contact data: see
www.k
nf.com).
With the pump at a standstill, open pressure and suction lines to
normal atmospheric pressure.
WARNING
Automatic starting can cause personal injury and
pump damage
When the operation of the pump is interrupted by the
thermal
switch or the trigging device for PTC sen-
sors, the pump will restart automatically after cooling
down.
Take all necessary care to prevent this leading
to a dangerous situation.
7.3. Switching Pump on/off
Switching pump on
The pump may not start up against pressure during switch-on.
This also applies in operating following a brief power failure.
If
a
pump starts against pressure, it may block.
This activates the
overload switch and the pump switches off.
Make sure that normal atmospheric pressure is present in the
lines during switch-on.
Pumpe am Netzschalter einschalten (siehe Fig. 1/3 in Kapitel
5).
Depending on the applied electrical voltage, initialization of the
electronics may take up to one second before the pump starts.
Pump standstill