installation &
operating instructions
Design Envelope 4300 & 4380 Vertical
In-line pumping unit with ivs drive
52
6.0 maintenance
6.1 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
• Provide the motor with correctly sized overload protection.
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 100°f/40°c).
warning
Whenever any service work is to be performed on a
pumping unit, disconnect the power source to
the driver, lock it o and tag with the reason. 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 recom-
mended. (See Armstrong files 43.85 and 43.86 for seal
environmental instructions).
6.2 lubrication
Pump
Lubrication is not required. There are no bearings in the
pump that need external lubrication service.
Large Design Envelope 4300 units are installed with a shaft
bushing located beneath the impeller that is lubricated from
the pump discharge.
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. None if not.
Check the lubrication instructions supplied with the motor for
the particular frame size indicated on the motor nameplate.
Warranty
Does not cover any damages to the equipment resulting from
failure to observe the above precautions. Refer to Armstrong
General Terms and Warranty sheet. Contact your local
Armstrong representative for full information.
warning
Whenever any service work is to be performed on a
pumping unit, disconnect the power source to
the driver, lock it o and tag with the reason. 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 recom-
mended. (See Armstrong files 43.85 and 43.86 for seal
environmental instructions).
warning
Hydronic system components may be pressurized
which, if suddenly released, can cause serious injury
or death. When performing any kind of service to
the pump, the pressure must be released in the
system and the unit should be properly drained
before starting any service work.
6.3 mechanical seal
6.3.1 mechanical seal replacement
instructions for 4300 split coupled
vertical in-line pump
1
2
3
7
9
1
1
2
1
1
56
3
24
10A
caution
Do not use oil, Vaseline or other petroleum or silicon
based products for seal elastomer lubrication.
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