Armstrong 4030 Manuale di installazione e istruzioni per l'uso - Pagina 7
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• To reverse rotation of a three-phase motor, interchange
any two power leads.
• Start the pump with the discharge valve closed and the
suction valve open, then gradually open the discharge
valve when the motor is at operating speed. The
discharge valve may be cracked or open slightly at start
up to help eliminate trapped air.
• When stopping the pump: Close the discharge valve and
de-energize the motor.
• Do not run the pump against a closed discharge valve for
an extended period of time. (A few minutes maximum)
• Star-Delta motor starters should be fitted with electronic/
mechanical interlocks that have a timed period of no more
than 40 milli-seconds when switching from star (Starting)
to delta (Run) connection yet allow the motor to reach full
star (Starting) speed before switching to delta (Run).
• Should the pump be noisy or vibrate on start-up a
common reason is overstated system head. Check this
by calculating the pump operating head by deducting
the suction pressure gauge value from the 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.
caution:
Check the direction of rotation against the rotation
arrow prior to operating the unit.
5 .
gener al care
Series 4030 pumps are built to operate without periodic
maintenance, other than bearing lubrication on some units.
A systematic inspection made at regular intervals will ensure
years of trouble-free operation, give special attention to the
following:
• Keep the 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 40°c / 10 0°f).
Series 4030
Base mounted pump
warning:
Whenever any service work is to be performed on
a pumping unit, disconnect the power source to the
driver, lock it off and tag with the reason. Any pos-
sibility 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. (See Armstrong files 43 . 85 & 43 . 86 for
seal environmental instructions).
caution:
Under no circumstances should the pump be used
for flushing out the system. In line with cibse
commissioning code W: 1994, the pump should be
out of line or bypassed during flushing.
6.
lubrication
Pump
Sealed Grease Bearings
• If the pump is fitted with greased lubricated bearings, no
external lubrication is required.
• These bearings are custom greased for general service
applications and sealed.
Oil Lubricated Bearings
• If the pump is fitted with oil lubricated bearings; use a
non-detergent oil equal to No.10 motor oil.
• Prior to start up check to make sure the oil level is visible
in the sight glass.
• Under normal operating conditions the oil should be
changed every year or 30 0 0 hours as follows:
1 Drain the oil from the old bearing bracket.
2 Thoroughly flush the bearing bracket with Kerosene.
3 Refill the oil through the vent on top of the bracket until
the oil level is visible in the middle of the sight glass.
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 mo-
tor for the particular frame size indicated on the motor
nameplate.
in sta l l a t io n &
o pera t ing instr uct io n s
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