Xylem CentriPro Serie Manuel D'instruction page 3

WIRE SIZING, SPLICING and POWER SUPPLY WIRE SIZING, SPLICING and POWER SUPPLY
Always follow the National Electric Code
WARNING
(N.E.C.), Canadian Electrical Code, and any
state, provincial, or local codes.
Use only copper wire. Size wire from the
MAID manual, or an N.E.C. (National
Hazardous voltage
Electric Code) code book. If discrepancies
can shock, burn or
cause death.
exist the N.E.C. book takes precedence over
a manufacturer's recommendations.
Splicing Wire to Motor Leads
When the drop cable must be spliced or connected to the
motor lead it is necessary that the splice be watertight.
The splice can be done with heat shrink kits or waterproof
tape.
A. Heat Shrink Splice Instructions
To use a typical heat shrink kit: strip ½" from the mo-
tor wires and drop cable wires, it is best to stagger the
splices. Place the heat shrink tubes on the wires. Place
the crimps on the wires and crimp the ends. Slide the
heat shrink tubes over the crimps and heat from the
center outward. The sealant and adhesive will ooze
out the ends when the tube shrinks. The tube, crimps,
sealant, and adhesive create a very strong, watertight
seal.
B. Taped Splice Instructions
A) Strip individual conductor of insulation only as far
as necessary to provide room for a stake type con-
nector. Tubular connectors of the staked type are
preferred. If connector O.D. is not as large as cable
insulation, build-up with rubber electrical
tape.
B) Tape individual joints with rubber electrical tape,
using two layers; the first extending two inches
beyond each end of the conductor insulation end,
the second layer two inches beyond the ends of the
first layer. Wrap tightly, eliminating air spaces as
much as possible.
C) Tape over the rubber electrical tape with #33
Scotch™ electrical tape, or equivalent, using two
layers as in Step "B" and making each layer over-
lap the end of the preceding layer by at least two
inches.
In the case of a cable with three conductors encased in a
single outer sheath, tape individual conductors as de-
scribed, staggering joints.
Total thickness of tape should be no less than the thickness
of the conductor insulation.
WIRING THE CONTROLS and
WIRING THE CONTROLS and
WARNING
SWITCH
SWITCH
Mounting the Motor Control Box
Single phase 3-wire control boxes meet U.L.
Hazardous voltage
requirements for Type 3R enclosures. They
can shock, burn or
cause death.
are suitable for vertical mounting in indoor
and outdoor locations. They will operate at temperatures
between 14ºF (-10ºC) and 122ºF (50ºC). Select a shaded,
dry place to mount the box. Ensure that there is enough
clearance for the cover to be removed.
Verify Voltage and Turn Supply Power Off
Ensure that your motor voltage and power supply voltage
are the same.
Place the circuit breaker or disconnect switch in the OFF
position to prevent accidentally starting the pump before
you are ready.
Three-phase starter coils are very voltage sensitive; always
verify actual supply voltage with a voltmeter.
High or low voltage, greater than ±10%, will damage mo-
tors and controls and is not covered under warranty.
Connecting Motor Leads to Motor
WARNING
Control Box, Pressure Switch or Starter
Caution Do not power the motor until all
electrical and plumbing connections are com-
pleted. Verify that the disconnect or breaker
Hazardous voltage
is OFF before connecting the pressure switch
can shock, burn or
cause death.
line leads to the power supply. Follow all
local and national codes. Use a disconnect where required
by code.
A. Three-Wire Single Phase Motor
Connect the color coded motor leads to the mo-
tor control box terminals - Y (yellow), R (red), and
B (black); and the Green or bare wire to the green
ground screw.
Connect wires between the Load terminals on the
pressure switch and control box terminals L1 and L2.
Run a ground wire between the switch ground and
the control box ground.
B. Two-Wire Single Phase Motor
Connect the black motor leads to the Load terminals
on the pressure switch and the green or bare ground
wire to the green ground screw.
C. Three phase motors
Connect the motor leads to T1, T2, and T3 on the 3
phase starter. Connect the ground wire to the ground
screw in the starter box. Follow starter manufacturers
instructions for connecting pressure switch.
Connect To Power Supply
Complete the wiring by making the connec-
WARNING
tion from the single phase pressure switch
Line terminals to the circuit breaker panel or
disconnect where used.
Three phase - make the connections between
Hazardous voltage L1, L2, L3, and ground on the starter to the
can shock, burn or
cause death.
disconnect switch and then to the circuit
breaker panel.
Three phase installations must be checked for motor
rotation and phase unbalance. To reverse motor rotation,
switch (reverse) any two leads. See the instructions for
checking three phase unbalance in MAID or pump IOM.
Failure to check phase unbalance can cause premature
motor failure and nuisance overload tripping. If using
a generator, see Technical Data for generators in pump
IOM, MAID Manual, catalog or website.
Three Phase Overload Protection
Use only Class 10, quick-trip overload protection on three-
phase submersible motors. A Three-Phase Starter with
Class 10 overload protection must be used on three-phase
submersible motors.
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