Flint & Walling Commander Pro 300 - Manual (Page 7)

7
95 North Oak Street • Kendallville, IN 46755
2. The ground wire to be used must be of the same
size as the submersible power cable. It may be
insulated or bare. If insulated, it must be green,
with or without yellow stripe(s). The ground wire
may be part of, or separate from, the supply
cable. It may be continuous or spliced above the
pump along with the supply cable.
3. The motor lead wire assembly includes a green
insulated ground lead. Splice the ground wire to
the green insulated lead as shown in Figure 6.
4. The other end of the ground wire will be
connected to the power supply grounding
terminal or to the control panel ground bar if it is
connected to the power supply ground.
NOTE: See section entitled Grounding for detailed
grounding instructions.
INSULATION AND CONTINUITY TEST
1. It is recommended that this test be done when
the splicing is complete and pump is being test
run in a tank of water. This test can be repeated
after installation in well but before the final
electrical hook-up is made to the control box or
pressure switch (see Figures 7 & 8).
2. Zero the ohmmeter by clipping the leads together
and adjusting the zero ohm knob until the needle
indicates zero. Zero the ohmmeter before each
use or every time selector switch is changed.
3. Clip one ohmmeter lead to bare cable end.
4. Clip the other lead to edge of steel tank in which
pump and cable are submerged. If pump is
already in the well, clip lead to discharge pipe
metal well casing or bare ground wire.
5. A reading of less that 1,000,000 ohms indicates
that cable or splice is grounded. Slowly raise
cable from the water at the ohmmeter end.
When trouble spot moves clear of the water,
needle will move toward infinity reading. In
an old installation with the pump in the well,
a reading of 20,000 ohms or less indicates a
breakdown in the insulation; in this case pull the
pump.
PUMP INSTALLATION
IL0098
Figure 7
IL0099
Figure 8
1. The following pump installation instructions use
Schedule 80 PVC pipe or galvanized pipe. If
either of these two types are used, a foot clamp
or vise will be required to hold the PVC or
galvanized pipe when connecting the next pipe
length.
2. Install the pump in a well which is sand-free,
straight, and has sufficient flow of water to supply
the pump. Clear well of sand and any other
foreign matter with a test pump before installing
the submersible pump.
NOTE: Using the submersible pump to clean the
well will void the warranty. When drilling a new well
in an area where sand is a problem, a sand screen
must be installed to protect the pump and motor.
3. Chlorinate the well first. Drop 24 to 48 HTH
(chlorine) tablets into the well before lowering
the pump into the well. This will prevent
contamination and the growth of iron bacteria
which could later plug the well and the pump.
The chlorinated water will be pumped out of the
system when testing the pump flow.
4. BE SURE the top edge of the well casing is
perfectly smooth; sharp or jagged edges can cut
or scrape the cable and cause a short.
5. Install a line check valve within 25 feet of the
pump and below the draw down level of the water
supply. The check valve should be the same size
as the discharge outlet of the pump or larger.
NOTE: Use of pipe smaller that the discharge
tapping of the pump will restrict the capacity of the
pump and lower its operating performance.
6. When connecting the first length of pipe and
placing the pump in the well casing, care should
be maintained to center the pump in the well. It
is easier to handle the pump if a short piece of