Gorman-Rupp Pumps S4C65-E10 460/3 861279 thru 1142084 - Manual (Page 33)

CONTROL BOXES OM--04136
OPERATION PAGE C -- 1
OPERATION --- SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the control box.
The electrical power used to operate
this control box is high enough to cause
injury or death. Make certain that the
control handle on the control box is in
the OFF position and locked out, or that
the power supply to the control box has
been otherwise cut off and locked out,
before attempting to open or service the
control box. Tag electrical circuits to
prevent accidental start-up.
Obtain the services of a qualified elec-
trician to make all electrical connec-
tions, and to troubleshoot, test and/or
service the electrical components of the
control box.
CONTROL BOX FUNCTION
The control box is not designed to be ex-
plosion-proof. Do not operate in an ex-
plosive atmosphere.
The control box is provided to facilitate operation of
the pump. It contains controls for starting and stop-
ping the pump, and provides overload protection
for the pump motor. The pump control may be
equipped with an optional automatic liquid level
sensing device, in which case the low voltage cir-
cuits are also contained within the control box.
The control box provides overload pro-
tection and power control. Do not con-
nect the pump motor directly to the in-
coming power lines.
Since operation of the pump motor is de-
pendent upon the quality and performance
of the electrical controls, the pump warran-
ty is valid only when controls have been
specified or provided by The Gorman-
Rupp Company.
Component Function
The control box contains the following hand-oper-
ated switches and controls:
D
The control handle operates the control
box circuit breakers. In the OFF position, the
control handle opens the circuit breakers to
interrupt incoming power through the con-
trol box and prevent pump operation. In the
ON position, it closes the circuit breakers to
permit pump operation. The circuit breakers
will open or “trip” automatically in the event
of a short circuit overload current. When
tripped, move the control handle to OFF and
back to ON to reset the circuit breakers.
D
The selector switch controls the mode of
operation. In the OFF position, it prevents all
operation of the pump. In the HAND posi-
tion, it allows the pump to run continuously.
In the AUTO position, it allows the pump to
be controlled automatically by the optional
liquid level control system, if used.
D
The reset pushbutton resets the motor over-
load after it has been TRIPPED by an over-
load. The overload relay will trip automatical-
ly if the current drawn by the motor exceeds
design specifications. Allow 10 seconds for