Gorman-Rupp Pumps SF4A 1488019 and up - Manual (Page 11)

SF SERIES OM-06432
PAGE B - 3 INSTALLATION
Either hose or rigid pipe may be used to make dis­
charge connections. The discharge line must be
independently supported to avoid vibration and
strain on the pump. For maximum pumping capac­
ity, keep the line as short and straight as possible.
Elbows and fittings used in a discharge line in­
crease friction losses; 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.
Field Wiring Connections (Incoming Power)
Field wiring is not provided with this pump, and
must be supplied by the user. The field wiring must
be of the proper size and type to ensure an ade­
quate voltage supply to the pump. Voltage avail­
able at the motor must be within the range indi­
cated in Table B-2.
TABLE B-2. MOTOR VOLTAGE LIMITS
NOMINAL
VOLTAGE
3 230 207 253
PHASE MINIMUM
VOLTAGE
MAXIMUM
VOLTAGE
3 460 414 506
3 575 517 632
3 208 187 229
Use conduit cable clamps to secure the incoming
field wiring to the control box. Make certain all con­
nections are tight. If necessary, support the cable
weight to prevent excessive strain on cable clamps
and cable.
Dual Voltage
230V and 460V versions of these pumps
are dual‐voltage; however, they are
wired at the factory only for the voltage
shown on the nameplate. Do not attempt
to change the voltage in the field. If de­
sired to have the voltage changed, re­
turn the pump to the factory or to an au­
thorized Gorman‐Rupp repair facility
only. Otherwise, damage to the pump
and injury or death to personnel can re­
sult.
Motor Cable Grounding Test
Do not connect the pump power or con­
trol cables to the control box or incom­
ing voltage before verifying the pump
ground. Otherwise, personnel will be
exposed to serious injury or death.
Connect one lead of a lamp, bell or similar testing
device to the motor cable green/yellow ground