AAON LC-054 - Manual (Page 31)

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discharge gauge reading. Convert the result
into the units of the pump head as stated on
the pump nameplate and compare the
values. Should the actual pump operating
head be significantly less than the nameplate
head value it is typically permissible to
throttle the discharge isolation valve until
the actual operating head is equal to the
nameplate value.
Any noise or vibration usually disappears.
The system designer or operator should be
made aware of this soon as some adjustment
may be required to the pump impeller
diameter or drive settings, if applicable, to
make the pump suitable for the system as
installed.
Check rotation arrow prior to operating the
unit. The rotation of all Vertical In-Line
units is “clockwise” when viewed from the
drive end. (Looking from on top of / behind
the motor)
General Care
Vertical In-Line pumps are built to operate
without periodic maintenance, other than
motor lubrication on larger units. A
systematic inspection made at regular
intervals, will ensure years of trouble-free
operation, giving special attention to the
following:
Keep unit clean. Keep moisture, refuse, dust
or other loose particles away from the pump
and ventilating openings of the motor
Avoid operating the unit in overheated
surroundings (Above 100ºF/40ºC).
Any possibility of the unit starting while
being serviced must be eliminated.
If mechanical seal environmental
accessories are installed, ensure water is
flowing through the sight flow indicator and
that filter cartridges are replaced as
recommended.
Lubrication
Pump
Lubrication is not required. There are no
bearings in the pump that need external
lubrication service.
Motor
Follow the lubrication procedures
recommended by the motor manufacturer.
Many small and medium sized motors are
permanently lubricated and need no added
lubrication. Generally if there are grease
fittings evident the motor needs periodic
lubrication, and if there are no grease fittings
evident, no periodic lubrication is required.
Check the lubrication instructions supplied
with the motor for the particular frame size
indicated on the motor nameplate.
Mechanical Seal
Mechanical seals require no special
attention. The mechanical seal is fitted with
a flush line. The seal is flushed from
discharge of the pump casing on split-
Check rotation arrow prior to
operating the unit.
CAUTION
Electric shock hazard. Before
attempting to perform any service or
maintenance on pumping unit,
disconnect power source to drive,
LOCK IT OFF and tag with the
reason.
WARNING