Aligning The Pump-Motor Unit; Rotation Direction; Features Of The Intake Pipes - Comet HPP SL Serie Instrucciones Para El Ensamblaje Y Mantenimiento

ALIGNING THE PUMP-MOTOR UNIT

Correct alignment is essential to ensure regular functioning and long-life.
In the case of transmission of motion by means of pulleys and belts, use an alignment bar to align the
pulley with the motor.
In the case of connection with a flexible joint, align using the relative bar, keeping in mind that as
regards angular alignment, a maximum deviation of 3° is allowed.
Alignment must always and only be done when the motor is switched off.

ROTATION DIRECTION

Always observe the exact rotation direction indicated by the arrow near the power take-off shaft (Fig.
07).
PIPES
The layout of the pipes and their connection have a decisive influence on how the pump works and its
life.
The pipes must not transmit excessive forces or moments to the pump they areconnected to. They
must be made to coincide before the bolts are tightened; under no circumstances must you attempt
to straighten the pipes by tightening the flange bolts or threaded fittings.

FEATURES OF THE INTAKE PIPES

In order to minimise vibrations in the system we recommend connecting flexible pipes to the pump at
the initial part, both for intake and delivery.
The intake pipe must be sufficiently resistant so the vacuum produced by the pump does not cause it
to shrink. Its inside diameter must be a minimum 65 mm at all points (2 1/2 inch.).
Feed the pump from both intakes. Make sure all fittings and pipes are leakproof.
Do not use 90° elbows, connections with other pipes, constrictions, reverse gradients, inverted "U"
bends or tees.
Make sure the connections are such that when the pump stops the pipe does not empty.
Fig. 07
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