Start Up - Johnson Pump SPX MDR Manual De Instrucciones

3.3
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• Use the grip on the pump outlet when assembling/disassembling the pipe
connections to avoid damaging the pump body (see figure 6).
1
Figure 6: Grip (1).
Install a valve on the suction and pressure side to be able to disconnect the
pump from the system. Make sure that the pump can be drained without
damaging persons, environment or equipment.
• When the pump does not have a flooded suction, install a foot valve on the suction
line. Fill up the pump and evacuate all air. Make sure that it will never run dry.
• If there is any risk of air pockets in the system or in the pump body, a ventilating valve
must be installed on the pressure side.
• If there is any risk that the discharge head will not reach the minimum head needed
(see paragraph 2.3 "Minimum back pressure"), install a valve to adjust the head.
• If there is any risk of dry running, install a suitable dry running protection to avoid pump
breakdown. This is absolutely necessary and required when pumping liquids that are
easily flammable.

Start up

• Prime pump. When operating with lift, prime and work out all air.
Pump must not be run without liquid – not even for a short time. When
pumping liquids that are easily flammable, no air is allowed in the system.
This is absolutely necessary in order to avoid that static electricity is
generated in the pump which may cause sevre personal and material damage.
• Check rotation. Open the suction valve and close discharge valve. Check the
rotation of the pump by turning the pump on briefly once. Make sure that the motor
rotates in the correct direction (see rotation arrow on the pump body).
• Starting. When the pump has been started, open the discharge valve slowly and
check the pressure, temperature and flow. Make sure that the piping is properly sealed
and that the pump functions satisfactorily. If not, follow the trouble shooting chart (see
chapter 5) or contact yourlocal distributor. Do not run against closed valve for
more than 3 minutes.
If the pumpshaft is not running at the same speed as the motorshaft, the
magnets are slipping and the motor has to be shut off immediately. A
knocking sound is also audible when this happens.
When returning a pump for repair, investigation or other reason, it must be cleaned and
wrapped up in a proper way. Documentation stating pumped liquid, operating conditions,
your own opinion of fault/failure reason and your contact person must be included in the
pump package. Also contact the consignee before returning the pump.
Installation and maintenance
MDR/EN (1206) 3.2