Installation, Operation, Lubrication, Maintenance And Storage Instructions; Safety; Storage; Pump Location And Piping Design - Pentair MYERS APLEX Series Installation And Service Manual

INSTALLATION, OPERATION,
LUBRICATION, MAINTENANCE AND
STORAGE INSTRUCTIONS

SAFETY

Electrical power or engine must be shut off completely
before attempting service on the pump or its drive. Air
surrounding the unit to be free of toxic, flammable, or
explosive gases.
A properly sized and set relief valve installed in the
pump discharge system (ahead of any block valves) is
necessary to protect personnel and to avoid dangerous
overpressure. The relief valve set pressure should
be not more than 25% above the design operating
pressure and should discharge to tank or to the
atmosphere (toward the ground), and must not be
directed back to the pump suction system.
WARNING: Improper use of this equipment could result
in loss of life.
CALIFORNIA PROPOSITION 65 WARNING:
WARNING: This product and related accessories
contain chemicals known to the State of California to
cause cancer, birth defects or other reproductive harm.

STORAGE

Pumps are shipped dry from the factory. If a pump has
been in storage in a humid environment for more than
6 months the crankcase cover should be removed and
carefully examined for rust or water collected in the
power end. Flush out any evidence of rust or damage
that exists, using a light clean oil.
Pumps to be placed in extended storage should be
cleaned, repaired as needed, and completely filled to
the top with clean oil to prevent rusting. Rotate pump
monthly 4-1/2 resolutions. Plug all openings to prevent
air entry and oil leakage.
Fluid ends must be completely drained of water and
suction and discharge ports blanked off. Store pump in
a clean, dry location.

PUMP LOCATION AND PIPING DESIGN

Locate pump and driver in a clean, well drained,
ventilated, and brightly illuminated area, with adequate
working spaces around the pump to provide ample
access to fluid end, power end, and associated drive
elements.
The supply tank(s) should be large to allow dissolved
air and other gases to escape from the liquid and allow
suspended solids to settle out before entering pump.
A system employing dams and settling chambers
is desirable.
CAUTION: All pumps should be installed level. For
mobile applications the maximum angle of intermittent
operation pumps (SC pumps) should be no more than
5 degrees in any one direction.
Pumps are not designed to withstand piping weight,
vibration, and the effects of thermal piping expansion/
contraction. Piping loads may be considerable and the
weight of all valving, dampeners, filters, and associated
forces, moments, and couples must be completely
isolated. Use flexible hoses and rigid piping supports to
isolate the pump and its driver from these effects.

SUCTION PIPING

No part of the piping system deserves more careful
planning than the suction piping system. Suction
piping must be short, direct and oversize. Use one pipe
size larger than the pump suction connection. 1 to 3
feet per second suction velocity is acceptable.
Reference the following table to size a direct suction
line from a tank to a pump.
4" – 6"
MA-240M
MA-240M-HD
SC-300
Use no elbows, tees, or restricted port valves in
this line. Do not install orifice plates or positive
displacement type fluid meters in the suction line
which act as flow restrictors. Avoid the use of suction
filters. Consider filtering the liquid as it enters the
supply tank rather than as it leaves it. The use of an
eccentric reducer with the flat side up located at the
pump suction connection is recommended. The suction
line should slightly rise from tank to pump and loops in
which air may collect must be avoided.
The absolute pressure in a suction line may be less
than atmospheric pressure and air may be sucked into
the line unless all flanges and connections are airtight
and watertight. If you can see water leaking out of a
suction line when the pump is still, that may mean air
is being sucked in when the pump is running.
Suction piping should be buried beneath the frost
line, or insulated to avoid freezing in the winter. If the
suction line has a block valve at the supply tank, a
suitable relief valve is suggested to relieve the suction
piping from any possible dangerous overpressure from
the discharge piping system.
14
Suction Piping
6" – 8" 8" – 10"
MA-240L MA-240K
MA-240L-HD SC-300L
RO-358L