Pentax HP Manual Del Usuario página 55

5. WORKING AND USAGE
• SETTING AND CHECK OPERATIONS
ATTENTION!
Before starting the pump, please follow the instructions below (Fig.31):
– check the port connections to the pipes.
– check flushing connections and cooling circuit connections (where applicable).
– check the rotation direction by starting the pump and switching it off
immediately, as it must not work dry.
– ensure the suitability of the lubricating oil and its right quantity.
– check the conformity of the electric connections and protections.
– check the protections of all the rotating parts.
– check that the installation can be started.
5.1 • STARTING / STOP
2. STARTING AND WORKING
- When installed, activate the seal flushing and the cooling/heating system.
- Close the delivery valve all the way.
- Open the shut-off valve in the intake piping all the way.
- Prior to starting the pump, bleed the air and fill with fluid to be conveyed to
the intake or suction pump.
- When the pump is below head, this will take place automatically when the
intake valve opens.
- When the pump is above head, use a connection of the delivery piping.
- Open completely all of the auxiliary connections (fluid seal, washing fluid),
then make sure the fluid pours out.
- Start the motor and check the mechanical operation.
- When the motor has reached the working speed, adjust the delivery valve
until reaching the pump rating head.
- If the OIL BEARINGS COOLING KIT is present, follow the instructions in
the dedicated paragraph.
ATTENTION!
The pump should not be run for lengthy periods with the gate valve in
the output line closed.
This will cause overheating and ultimately pump failure.
– The pump must not be run dry. When running the pump should be silent
and should not vibrate.
– If the pump is fitted with a packed gland, it should be adjusted so that there
is a slight leak through the packings. This will ensure that the packing surfaces
are water cooled and will not overheat.(Fig.32)
– If the pump is fitted with a spring loaded mechanical seal, no adjustment is
needed.
– Check that the maximum input energy for the electric motor driving the
pump does not exceed the maximum rated power shown on the pump label.
ATTENTION!
Any stand-by pump should be started and checked at least once a week.
This will ensure mechanical integrity and correct operation.
ROTATION DIRECTIONS
Pump
shaft
Gland packing seal
20
Motor
YES
shaft
Coupling guard
Strainer
Fig.31
Gland packing
OK