7
Field Wiring
All wiring connections and wiring sizes must meet
National Electrical Code and local requirements.
Motor Protection
See the motor nameplate for electrical connection/wiring
diagram.
Berkeley pumps must be used with the proper size and
type of motor starter to ensure protection against damage
from low voltage, phase failure, current imbalances, and
overloads. The overload should be sized to trip at the
full-load current rating of the motor.
OPERATION
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
accidentally started.
NOTICE: Under no circumstances should the pump be
operated without flow through the pump. Never operate
the pump dry.
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 (Figure 8). Do not remove the needle valve.
NOTICE: On BVMI(X)2/4 models, remove the coupling
guard for access to the vent plug.
Risk of flooding. Can cause personal injury
and/or property damage. 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.
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.
NOTICE: Please turn to Starting 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 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 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.
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. 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. Can shock, burn or
kill. 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 8 - Priming and Drain Plugs
