14
MDR/EN (0909) 1.0
4.0 Installation and maintenance
4.1 General
• Anchor the pump properly.
• The pump must be provided with lockable circuit breaker to avoid inadvertant
starting.
• Before any service or maintenance in the pump or system, shut off the power and lock
the starting device to prevent inadvertent start. Close the valves on the in- and outlet
line and drain the pump and system before it is separated from the system. Follow the
instructions for disassembly/assembly (see section 4.5).
4.2 Installation and piping
• Use
at least the same diameter on pipes from and to the pump as for the diameter of
the in- and outlet ports.
• Flush all pipes before installing the pump.
• Install the pump closest possible to the tank to be pumped from.
• Bolt the pump in place horizontally.
• Only use plastic pipe connections.
• Use care to prevent scraps or trashes from entering the piping during piping work.
• Only use pipe sealants formulated specifically for plastics, i.e. Teflon tape, Permatex
no. 2, etc.
• Use the grip on the pump outlet when assemb-
ling/disassembling the pipe connections to avoid
damaging the pump body (see fig).
• 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 section 2.3), 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.
Grip
