Gorman-Rupp Pumps SFV3A 1473393 and up - Manual (Page 19)

SF SERIES OM-06396
PAGE C - 5 OPERATION
Control Box
Control boxes are available as optional equipment
from the factory. The control boxes contain con­
trols for starting and stopping the pump, and pro­
vide overload protection for the pump motor. The
pump control may be equipped with an optional
automatic liquid level sensing device, in which
case those circuits are also contained within the
control box.
Since operation of the pump motor is dependent
upon the quality and performance of the electrical
controls, the pump warranty is valid only when
controls have been specified or provided by The
Gorman‐Rupp Company.
The pump motor and control box are not
designed to be explosion‐proof. Do not
operate in an explosive atmosphere.
Any control box used to operate the
pump must be approved by the Gor­
man‐Rupp Company for the application.
Improper location of a non‐explosion
proof control box could result in de­
struction of equipment, injury or death
to personnel.
See the operating instructions furnished with the
control box, and with other optional accessories
and controls, before attempting to start the pump.
PUMP OPERATION
Liquid Temperature and Overheating.
Overheated pumps can cause severe
burns and injury. If the pump becomes
overheated:
1. Stop the pump immediately.
2. Lock out the power to the control
panel to ensure that the pump will
remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Close the discharge valve (if
used).
5. Refer to instructions in this manual
before restarting the pump.
Overheating can occur if the pump is misapplied;
if it is started more than 10 times within one hour;
if the temperature of the liquid being pumped ex­
ceeds the temperature for which the pump was de­
signed, if the control box fails to provide overload
or thermal protection, or if the pump is operated
against a closed discharge valve for an extended
period of time.
Do not start the pump more than 10 times
per hour. If the motor does not cool be­
tween starts it will overheat, resulting in
damage to the motor windings.
Approach the pump cautiously after it
has been running. Although the motor is
cooled by the liquid being pumped, nor­
mal operating temperatures can be high
enough to cause burns. The tempera­
ture will be especially high if operated
against a closed discharge valve. Never
operate against a closed discharge
valve for long periods of time.
If overheating does occur, stop the pump immedi­
ately and allow it to cool before servicing it. Ap­
proach any overheated pump cautiously.
Overheated pumps can cause severe