Gorman-Rupp Pumps PAV3C60C-B-E10 575/3 All serial numbers - Manual (Page 20)

OM-06502 PA SERIES
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 pump.
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.
This pump is designed to handle most
non‐volatile, non‐flammable liquids
containing specified entrained solids
and corrosives. Do not attempt to pump
volatile, corrosive, or flammable liquids
which may damage the pump or endan­
ger personnel as a result of pump fail­
ure.
Pump operating condition points must be
within the continuous performance range
shown on the Performance Curve in Sec­
tion E.
STARTING AND OPERATION
Control Box Function
The control box provides overload pro­
tection and power control. Do not con­
nect the pump motor directly to the in­
coming power lines.
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 also con­
tains low voltage circuits for the optional automatic
liquid level sensing device.
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.
When used in conjunction with the optional
liquid level controls, the AUTO position al­
lows the pump to be controlled automatical­
ly by the liquid level control system.
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