Gorman-Rupp Pumps SF4A-X 1531245 and up - Manual (Page 13)

SF SERIES X‐PROOF PUMPS OM-06629
PAGE B - 4 INSTALLATION
It is recommended that a check valve or throttling
valve be installed in the discharge line to control si­
phoning or back flow when the pump is shut off.
ELECTRICAL CONNECTIONS
Install and operate this pump in accor­
dance with the National Electrical Code
and all local codes. Have a qualified
electrician perform all checks and con­
nections in this section.
Never attempt to alter the length of the
pump motor cable or to repair it with a
splice. The power cable and pump mo­
tor must be kept completely waterproof.
Serious damage to the pump and injury
or death to personnel can result from
any alteration to the cable.
Field Wiring Connections (Incoming Power)
Do not connect the pump motor directly
to the incoming power lines. The pump
motor is designed to operate through a
control box which provides overload
protection and power control; other­
wise, the pump warranty will be voided.
Make certain that the pump and control
box are properly grounded, and that the
incoming power matches the require­
ments of the pump and controls. Install
and operate the control box in accor­
dance with the National Electric Code
and all local codes. Failure to follow
these could result in injury or death to
personnel.
Field wiring is not provided with this pump, and
must be supplied by the user. The field wiring must
be of the proper size and type to ensure an ade­
quate voltage supply to the pump. Voltage avail­
able at the motor must be within the range indi­
cated in Table B‐2.
Table B‐2. Pump Voltage Requirements
NOMINAL
VOLTAGE
3
3
230
460
207
414
253
506
PHASE
MINIMUM
VOLTAGE
MAXIMUM
VOLTAGE
3 208 187 229
3 575 517 632
Use conduit cable clamps to secure the incoming
field wiring to the control box. Make certain all con­
nections are tight. If necessary, support the cable
weight to prevent excessive strain on cable clamps
and cable.
Refer to the wiring diagrams at the end of this sec­
tion for field wiring connections.
Dual Voltage
This pump was wired at the factory only
for the voltage shown on the nameplate.
Do not attempt to change the voltage on
a dual‐voltage motor. If desired to have
the voltage changed, return the pump to
the factory or to an authorized Gorman‐
Rupp repair facility only; otherwise, the
pump warranty will be negated, and
damage to the pump, and injury or death
to personnel can result.
Motor Cable Grounding Test
Do not connect the pump control cable
to the control box or incoming voltage
before verifying the pump ground;
otherwise, personnel will be exposed to
serious injury or death.
Connect one lead of a lamp, bell or similar testing
device to the motor cable green/yellow ground
lead (s). Connect the second test lead to an unin­
sulated point on the pump body. The test circuit
should close.