Gorman-Rupp Pumps SFV4E 1491311 and up - Manual (Page 12)

OM-06431 SF SERIES
PAGE B - 4 INSTALLATION
Ground the pump to the control box using the pow­
er cable ground(s) and ground check wire (if so
equipped). Secure the ground wire(s) and ground
check wire (if so equipped) to the grounding lug(s)
inside the control box to ensure a thorough ground
for the pump.
Ground the pump using the power cable
ground wire(s) before applying line po­
tential. Failure to properly ground the
pump could result in damage to the
pump or control and/or injury or death to
personnel.
Refer to Figures B-1 and connect the pump motor
cable to the control box.
Figure B-1. Three Phase Power
Cable Connections
Control leads P1 and P2 provide the motor with
thermal protection. Control leads W1 and W2 pro­
vide the motor with moisture protection. Refer to
Figure B-3 and connect the pump control cable to
the control box.
Figure B-2. Control Cable Connections
The thermal protection contacts will auto­
matically reclose when the motor cools to
the established safe operating tempera­
ture. Whenever automatic restarting is not
desirable, connect only to controls which
are wired for manual restart.
Refer to the appropriate wiring diagram accompa­
nying the control box when making electrical con­
nections.
Liquid Level Devices
Optional controls available from Gorman‐Rupp
may provide a means to automatically regulate the
liquid level. These control boxes may be con­
nected to the following sensing devices which per­
form either filling or dewatering functions (see Fi­
gure B-3).
The internal wiring of the sensing devices
are different for filling and dewatering func­
tions. Be sure to follow the instructions in­
cluded with the option before making con­
nections.
S
Diaphragm Type: two fixed‐position sen­
sors (upper and lower) each contain a dia­
phragm which flexes with changes in liquid
level, thus activating an enclosed miniature
switch.
S
Bulb (Float) Type: a bulb raises or lowers
(floats) with the liquid level, thus activating
an enclosed miniature switch.