Taco Comfort Solutions SCX1740 Series Owner's Manual page 4

High head - noryl impellers
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Connection diagram for dual voltage, single-phase motors. Your
dual-voltage motor's terminal board (under the motor end cover)
will match one of the diagrams below. Follow that diagram if nec-
essary to convert motor to 115 Volt power. Connect power supply
wires to L1 and L2.
For TEFC motors, see Figure 6, Page 5.
For 3-phase motors and motors that do not match these pictures,
follow the connection diagram on the motor nameplate, or in the
connection box.
THE MOTOR IS SET FOR 230 VOLTS
WHEN SHIPPED.
To change the motor to use 115 volts:
1. Turn off power
2. Remove the back motor cover.
3. Use a screwdriver or 1/2" wrench and turn the voltage selector
dial counterclockwise until 115 shows in the dial opening.
4. Reinstall the motor cover.
Figure 3: Changing the Voltage Setting
Figure 4: Motor Set for 115 Volt Operation
ELECTRICAL
cause death. Disconnect power to motor before working on pump
or motor. Ground motor before connecting to power supply.
WIRING
Ground motor before connecting to electrical power
supply. Failure to ground motor can cause severe or
fatal electrical shock hazard.
Do not ground to a gas supply line.
To avoid dangerous or fatal electrical shock, turn OFF
power to motor before working on electrical connections.
Supply voltage must be within ±10% of nameplate volt-
age. Incorrect voltage can cause fire or damage motor
and voids warranty. If in doubt consult a licensed electrician.
Use wire size specified in Wiring Chart (Page 3). If pos-
sible, connect pump to a separate branch circuit with
no other appliances on it.
Wire motor according to diagram on motor nameplate.
If nameplate diagram differs from diagrams above, fol-
low nameplate diagram.
ODP Motors, Single Phase
1. Install, ground, wire and maintain your pump in compliance
with the National Electrical Code (NEC) in the U.S., or the
Canadian Electrical Code (CEC), as applicable, and with all
local codes and ordinances that apply. Consult your local
building inspector for code information.
2. Provide a correctly fused disconnect switch for protection while
working on motor. For switch requirements, consult your local
building inspector for information about codes.
3. Disconnect power before servicing motor or pump. If the dis-
connect switch is out of sight of pump, lock it open and tag it to
prevent unexpected power application.
4. Ground the pump permanently using a wire of the same size
as that specified in wiring chart (Page 3). Make ground con-
nection to green grounding terminal under motor canopy
marked GRD. or
5. Connect ground wire to a grounded lead in the service panel
or to a metal underground water pipe or well casing at least 10
feet long. Do not connect to plastic pipe or insulated fittings.
6. Protect current carrying and grounding conductors from cuts,
grease, heat, oil, and chemicals.
7. Connect current carrying conductors to terminals L1 and L2
under motor canopy. When replacing motor, check wiring dia-
gram on motor nameplate against Figure 3. If the motor wiring
diagram does not match either diagram in Figure 3, follow the
diagram on the motor.
IMPORTANT: 115/230 Volt single phase models are shipped
from factory with motor wired for 230 volts. If power supply is
115 volts, remove motor canopy and reconnect motor for
230 volts. Do not try to run motor as received on 115 volt current.
8. Motor has automatic internal thermal overload protection. If
motor has stopped for unknown reasons, thermal overload
may restart it unexpectedly, which could cause injury or prop-
erty damage. Disconnect power before servicing motor.
9. If this procedure or the wiring diagrams are confusing, consult
a licensed electrician.
4
Hazardous voltage. Can shock, burn, or
.

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