
8BE991 (03-15-20)
OPERATIONS & MAINTENANCE
OPERATIONS
PRIMING
Risk of explosion and scalding. Do not run the
pump with the discharge valve closed; the water in the pump
may boil, causing risk of explosion and steam burns to anyone
nearby.
Risk of electric shock. Can shock, burn or kill.
Disconnect all power to the pump before servicing or working on
the pump.
Make sure that the power is locked out and that the pump
cannot be accidentallystarted.
Operation of closed systems or open systems with the liquid level
above the pump priming plug:
1. Close the discharge isolating valve and loosen the needle
valve located in the assembly in the pump head (Fig. 4). Do
not remove the needle valve.
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 needle valve to 25 inch-pounds. Completely open
isolation valves.
4. 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.
5. Refer to the Starting section before proceeding 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 itsecurely.
5. Repeat Steps 1-4 until the pump is primed.
6. Refer to the Starting section before proceeding anyfurther.
ROTATION DIRECTION
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 thepump.
Arrows on the pump head 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.
Do not check the direction of rotation until the pump has been
filled with liquid. See “Priming” directions.
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. To reverse the direction of rotation, first switch OFF the
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.
Risk of electric shock.
Ground the pump motor correctly before connecting to power
supply per article 250-80 of National Electrical Code (NEC) in
the U.S., or the Canadian Electrical Code (CEC), as applicable.
7. Switch on the power supply and recheck the direction of
motor rotation.
Vented
Priming
Plug
Drain
Plug
Back off needle valve
to vent air. Retighten
to 25 in.-lbs. when vent
port runs a steady stream
of water.
Figure 4 – Priming and Drain Plugs