19
PUMPS cont.
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.
• Large Series split-coupled units are installed
with a shaft bushing located beneath the impeller
that is lubricated from the pump discharge. This
bearing is field removable for service on the
20x20x19 size without disturbing the motor or
other major pump components.
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-coupled pumps and is
flushed/vented to the suction on close coupled
pumps.
• The split-coupled pump is flushed from the
pump discharge because the mechanical seal
chamber is isolated from the liquid in the pump
by a throttle bushing. Because the seal chamber
is isolated, seal environmental controls such as
filters and separators, when installed in the split-
coupled flush line are very effective, as only the
seal chamber needs cleansing, and will prolong
seal life in HVAC systems.
• Do not run the pump unless properly filled with
water as the mechanical seals need a film of
liquid between the faces for proper operation.
• Mechanical seals may ‘weep’ slightly at start-
up. Allow the pump to continue operating for
several hours and the mechanical seal to ‘seat’
properly prior to calling for service personnel.
System Cleanliness:
• Before starting the pump the system must be
thoroughly cleaned, flushed and drained and
replenished with clean liquid.
• Welding slag and other foreign materials, “Stop
Leak” and cleaning compounds and improper or
excessive water treatment are all detrimental to
the pump internals and sealing arrangement.
• Proper operation cannot be guaranteed if the
above conditions are not adhered to.
