OM-06100
S SERIES PUMPS
PAGE B - 4
INSTALLATION
pump, allowing one pump to feed the other on high
discharge head applications.
To determine the size of the discharge connection,
see
Table B-1, Pump Specifications
. Either
hose or rigid pipe may be used. To facilitate mobil
ity and maintenance, it is recommended that the
discharge line be fitted with a quick disconnect fit
ting near the pump. The discharge line must be in
dependently supported to avoid strain and vibra
tion on the pump.
Either hose or rigid pipe may be used to make dis
charge connections. For maximum pumping ca
pacity, keep the line as short and straight as pos
sible. Elbows and fittings used in discharge lines
increase friction loss, minimize their use.
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.
Control Box Installation
The pump is designed to be operated
through the control box furnished with
the pump. The control box provides
overload protection and power control.
Do not connect the pump motor directly
to the incoming power lines.
The control box is a rainproof enclosure with a pad
lockable front cover.
The enclosure is not de
signed to be watertight, and should not be sub
merged.
Refer to the control box manual for enclo
sure dimensions and parts.
Secure the control vertically on a level surface,
above flood level. The box should be easily acces
sible to the operator, and located close enough to
the pump to avoid excessive voltage drop due to
cable length (see
Pump Power Cable Connec
tion
). After the box is installed, make certain the
front cover latches properly.
Failure to mount the control box vertically
on a level surface may affect operation of
the pump controls.
Field Wiring Connections (Incoming Power)
The electrical power used to operate
this pump is high enough to cause inju
ry or death. Obtain the services of a
qualified electrician to make all electri
cal connections. Make certain that the
pump and enclosure are properly
grounded; never use gas pipe as an
electrical ground. Be sure that the in
coming power matches the voltage and
phase of the pump and control before
connecting the power source. Do not
run the pump if the voltage is not within
the limits.
Do not connect the pump motor directly
to the incoming power lines. The pump
motor is designed to operate through a
Gorman‐Rupp approved control box
which provides overload protection and
power control; otherwise, the pump
warranty will be voided. Make certain
that the pump and control box are prop
