6
1. Close the discharge isolating valve and loosen the
needle valve located in the assembly in the pump head
(Figure6,Page5).Donotremovetheneedlevalve.
Risk of water damage and injury. Watch the
direction of the priming plug and make sure that the liquid
escaping from it does not injure persons nearby or damage
the motor or other components. In hot water installations,
pay particular attention to the risk of injury from scalding
hot water or steam.
2. Slowly open the isolation valve in the suction pipe until
a steady stream of liquid runs out the vent in the priming
port.
3. Tighten the needle valve in the vent plug. Completely open
isolation valves.
NOTICE: Please turn to “Starting”, at right, before
proceeding any further.
Operation of open systems with the liquid level below the
top of the pump:
NOTICE: The suction pipe requires a check valve or
isolation valve.
1. Close the discharge isolation valve.
2. Remove the vented priming plug.
3. Pour liquid through the priming port until the suction
pipe and the pump are completely filled with liquid.
4. Replace the vented priming plug and tighten it securely.
5. Repeat steps 1-4 until the pump is primed.
NOTICE: Please turn to “Starting”, at right, before
proceeding any further.
Checking Direction of Rotation
NOTICE: Do not disconnect the motor from the shaft to
check the direction of rotation. If you remove the coupling,
then you must adjust the shaft position when you reinstall
it. This must be done before starting the pump.
Arrows on the pump coupling show the correct direction of
rotation. When seen from the motor fan, the pump should
rotate counterclockwise ( ). For pump motors without
a fan remove one of the coupling guards and look at the
coupling to determine the direction of rotation. Turn off the
pump and replace coupling guard.
NOTICE: Do not check the direction of rotation until the
pump has been filled with liquid. See “Priming”, at left and
above.
1. Switch power off.
2. Remove the coupling guard and rotate the pump shaft to
be certain it can turn freely. Replace the coupling guard.
3. Verify that the electrical connections are in accordance
with the wiring diagram on the motor.
4. If the fan is visible, turn on and off to verify rotation.
5.Toreversethedirectionofrotation,firstswitchOFFthe
power supply.
6. On three-phase motors, switch 2 of the 3 power leads
on the load side of the starter. On single-phase motors,
see the connection diagram on the motor nameplate.
Change the wiring as indicated.
Hazardous voltage. Voltage can shock,
burn or cause death. Ground the pump motor correctly
before connecting to power supply per article 250-80 of
NationalElectricalCode(NEC)intheU.S.,ortheCanadian
ElectricalCode(CEC),asapplicable.
7. Switch on the power supply and recheck the direction of
motor rotation.
Starting
1. If a suction line isolation valve has been installed, check
to be sure that it is completely opened.
2.For initial starting, the isolation valve in the discharge
pipe should be almost closed.
3. Start the pump.
4. When the piping system has been filled with liquid,
slowly open the discharge isolation valve until it is
completely open. Opening the valve too fast may result
in water hammer in the discharge pipe. If the pump or
system start to rattle, the pump is cavitating; to avoid
damage to the pump, reduce the flow through the
discharge isolation valve until the rattling stops. If this
does not give adequate flow for your installation, call
your installer or system designer.
5. Record the voltage and amperage of the motor. Adjust
the motor overloads if required.
6. If pressure gauges have been installed, check and record
operating pressures.
7. Check all controls for proper operation.
Motor Bearings
For the greasing schedule and greasing procedure
of the motor bearings follow the motor manufacturers
recommendations.
