Flint & Walling Commander Pro 300 - Manual (Page 10)

10
95 North Oak Street • Kendallville, IN 46755
ground lug will then be secured with the nut
which holds the pump on the motor.
d. Connect the other end of the ground wire to
the power supply grounding terminal or to the
control panel ground bar if it is connected to
the power supply ground.
e. All connections should be tight and corrosion
resistant, including screws, lugs or clamps.
Grounding Control Boxes
1. It is recommended the control box grounding
terminal always be connected to circuits which
include a grounding conductor. In fact, this is a
requirement of the National Electrical Code. If
the circuit has no grounding conductor and no
metal conduit from the box to supply panel, use
a wire at least as large as line conductors and
connect from supply panel to the control box and
to the motor lead ground wire.
WARNING: Failure to ground the box frame can
result in a fatal electrical shock hazard if a circuit fault
occurs.
WARNING: Serious or fatal electrical shock may result
from failure to connect all metal plumbing, and the
motor if outside a drilled well, to the power supply
grounding terminal with wire no smaller than motor
cable wires. Do not use motor in swimming area.
Grounding Lightning Arrestors In Control Boxes
1. When the box has a lightning arrestor, it must be
grounded, metal to metal, all the way to the water
strata for the lightning arrestor to be effective.
Grounding the arrestor to a driven ground rod
provides little or no protection for the motor.
SUBMERSIBLE MOTOR COOLING
1. When the pump is set below any screen
openings or below the bottom of the casing a top
feeding well condition can exist which reduces
the rate of cooling water flow past the motor.
2. If the flow rate is less than specified a flow
indicator sleeve or an alternate method of
increasing water velocity past the motor must be
used for proper cooling.
Minimum Velocity Past the Motor
4” dia. motor – .25 ft./sec. (7.62 cm/sec)
6” dia. motor – .5 ft./sec/ (15.24 cm/sec)
3. A flow inducer sleeve is a tube over the motor,
closed off above the pump intake and extended
to the bottom of the motor or lower. The sleeve
material is corrosion resistant metal or heavy
plastic (See Figure 12).
4. A flow inducer sleeve should always be used
when the pump is in an open body of water.
Make sure that such an installation is grounded.
MAINTENANCE
IL0103
Figure 12
Pump Body
Stainless Steel
Worm Gear Clamps
Screen, Intake
Flow Inducer Sleeve
(Corrosion Resistant Material)
Submersible Motor
Centering Bolt
Corrosion Resistant
(3 Places)
All Water Flows Past
Motor
Required Cooling Flow
Minimum GPM required for motor cooling in water
up to 86ºF (30ºC).
Inches
Casing or
Sleeve I.D.
4” High
Thrust Motor
.25 ft/sec
GPM
6” Motor
.5 ft/sec
GPM
8” Motor
.5 ft/sec
GPM
4
5
6
7
8
10
12
14
16
1.2
7
13
20
30
50
80
110
150
—
—
9
25
45
90
140
200
280
—
—
—
—
10
55
110
170
245
SERVING SUBMERSIBLE MOTOR AND
CONTROLS
1. The following is included to assist in motor
installation and servicing. These procedures are
limited to the motor and control system: they do
not include pump requirements.
TIGHTENING LEAD CONNECTOR JAM NUT
1. It is recommended that ssible damage from
removal may prevent resealing. Torque the jam
nut from 15 to 20 lb. ft. on Franklin 4” motor and
60 to 70 lb. ft. on a 6” motor.
CABLE IDENTIFICATION WHEN COLOR CODE IS
LOST
(Single Phase Only)
If the colors on the individual drop cables cannot
be determined and the leads cannot be positively
identified, proceed as follows: