Gorman-Rupp Pumps SM4G1-X30 460/3 1002211 thru 1241783 - Manual (Page 16)

OM−04417 SM SERIES
PAGE B − 11 INSTALLATION
peller rotation to ensure that the pump is properly
wired to the control box. See Checking Pump Ro-
tation in OPERATION, Section C.
PIPING
No suction piping is required in a standard sub-
merged application.
The SM Series pumps are provided with a suction
strainer to prevent large solids from clogging the
impeller. On high discharge head applications, the
strainer can be removed, and the pump suction
staged" to the discharge of another pump, allow-
ing one pump to feed the other.
To determine the size of the discharge connection,
see Table B-1, Pump Specifications. Either hose
or rigid pipe may be used. To facilitate mobility and
maintenance, it is recommended that the dis-
charge line be fitted with a quick disconnect fitting
near the pump. The discharge line must be inde-
pendently supported to avoid strain and vibration
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 possi-
ble. Elbows and fittings used in discharge lines in-
crease 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 NEMA type 10, MSHA certified
enclosure.
The enclosure is not designed to be
watertight, and should not be submerged. Refer
to the control box manual for enclosure dimen-
sions and parts.
Secure the control box 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-
tions). 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 trailing cable from the power source to the
control box must be furnished by the customer.
The cable must be flame-resistant, protected by an
instantaneous circuit breaker, and meet the speci-
fications indicated in the Table B−3.
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Obtain the services of a qu-
alified electrician to make all electrical