Sears 390.2521 - Manual (Page 6)

ELECTRICAL
A Disconnect power before working on pump, motor, pressure switch, or wiring.
Motor Switch Settings
If the motor can operate at either 115 or 230 volts, it is set
at the factory to 230 volts. Do not change motor voltage
setting if line voltage is 23Q volts, or if you have a single
voltage motor.
NOTICE: Never wire a 115 volt motor to a 230 volt line.
Remove Motor End Cover
Figure 4 - Removing Motor End Cover
You will need to remove the motor end cover to change
the voltage setting. The illustration above also shows the
pressure switch. If the power supply connection still
needs to be made, the pressure switch cover will need to
be removed.
Your motor terminal board (located under the motor end
cover) should look like the one at right.
Dial Type Voltage Selector
Ground Wire Connection
Figure 5 - Voltage Set lb 230 Volts, Dial Type
To change to I 15 volts:
1. Make sure power is off.
2. Turn the dial counter-clockwise until 113 shows in the
dial window.
3. Reinstall the Motor end cover
4. Go to Wiring Connections below.
A warning Hazardous volt^e. Can shock, bum, or
kill. Connect ground wire before connecting power
supply wires. Use the wire size (including the ground
wire) specified in the wiring chart. If possible, connect
the pump to a separate branch circuit with no other appli­
ances on it.
AWARNINGExplosion hazard. Do not ground to a gas
supply line.
WIRING CONNECTIONS
AWARNING Pire hazard. Incorrect voltage can cause a
fire or seriously damage the motor and voids the warranty.
The supply voltage must be within ±10% of the motor name­
plate voltage.