1
AV6 & AV8 Series
Metallic Vertical Centrifugal Pumps
Installation and Maintenance Instructions
ASSEMBLY
PUMPS WITH MOTORS
1. No assembly required. Simply unpack the pump and motor and
examine for any signs of shipping damage. If damage is detected,
save the packaging and contact the carrier immediately.
2. To install the pump into the system, just follow the installation
instructions provided.
PUMPS WITHOUT MOTORS
1. Unpack the pump and the supplied accessories and examine for
damage. If damage is detected, save the packaging and notify
the carrier immediately.
2. Install the coupling half (part of item 9) onto the motor shaft so
that it is flush with the end of the motor shaft (the coupling body
– not the three prongs). Tighten the setscrews on the coupling,
and place the coupling insert (rubber part of item 9) firmly in
place on the coupling.
3. Place the motor carefully on its fan cover with the motor shaft
pointing straight up. Place the motor adapter (item 1) onto the
motor face making sure to align the bolt holes.
4. Carefully lower the pump assembly on to the motor so that the
motor shaft goes through the motor mount (item 2). Note that the
mounting plate orientation is normally set so that the discharge
is opposite the motor feet (or the electrical box if the motor has
no feet). Adjust the motor shaft so that the three prongs on the
shaft coupling align with the three empty slots in the motor shaft
coupling with the insert. Once the coupling alignment is correct
(and the mounting plate alignment), rotate the pump until the
bolt alignment from the motor mount (item 2), through the motor
adapter (item 1) to the motor is correct. Install and tighten the
four bolts and washers (items 4, 5, and 6).
5. Spin the pump shaft by gripping the coupling assembly (Item 9)
to verify that there is no binding on the shaft.
6. Install the motor mount guard screen (item 3) with the hardware
provided (items 7 & 8).
7. Install the pump into the system following the installation instruc-
tions provided.
INSTALLATION REQUIREMENTS
MOUNTING
1. Base plate must be securely fastened so that there is no vibration
when pump is running.
2. Align the piping with the pump discharge. Do not connect the
piping until it is aligned properly and supported independently.
Do not pull the piping in line with the pump or support the piping
with the pump.
PIPING TO AND FROM THE PUMP
1. Install a valve on the discharge line to control the flow. Place the
valve within a distance of ten pipe diameters. Always support
the piping near the pump to minimize stress and strain.
2. Minimize frictional losses by increasing the piping size by one
diameter.
3. Use a minimum number of bends, keeping any bends a minimum
distance of ten pipe diameters from the pump.
4. Ensure the pump is leak free.
5. Maintain a flooded suction at all times. Use a float switch to turn
off the pump at low level.
CAUTION: Do not run the pump dry. This pump should never
be started without liquid in the casing. This could damage the
pump. The fluid being transferred by the pump lubricates the
pump components. Even short periods of running the pump
dry could damage the pump. It is recommended that run dry
protection be used. Optional electrical power monitors are
available to help protect against run dry.
ELECTRICAL CONNECTIONS
1. Perform the motor wiring according to NEC requirements and
local electrical codes.
2. Wire the motor for clock-wise rotation when facing the fan end
of the motor.
3. To verify correct motor rotation
a. Install the pump into the system.
b. Fully open the suction and the discharge valves.
c. Allow fluid to flow into the pump. Do not allow the pump to
run dry, as this will cause damage to pump components.
d. Jog the motor (allow it to run for only one to two seconds)
and observe the rotation of the motor fan. Refer to the direc-
tional arrow on the pump if needed.
Note: A pump running backwards will pump, but at a greatly
reduced flow and pressure.
3. A valve should be installed in the discharge line during the initial
operation of the pump. Then determine the power consumed. If
necessary, throttle back the flow until the pump draws the rated
horsepower of the motor.
(12 pages)
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