Electrical Information - Little Giant W8G05S9-21S Manual Del Propietário

INSTALLATION OF PUMP, DROP PIPE, AND
ASSOCIATED EQUIPMENT
Figure 1 illustrates a typical well installation showing in ground
components. Adhere to the following items when installing the
pump and drop pipe:
1. Fasten the submersible cable to the drop pipe with clamps
or appropriate tape every 10 ft. (3m) to prevent tangling
and damage to the cable. The cable must remain slack when
using plastic drop pipe to allow for stretching of pipe when
installed in the well.
2. Take care not to scrape or pinch the submersible cable
against the well casing.
3. Use an ohmmeter or megger to make insulation and
continuity checks on the cable once the pump is installed.
This locates any fault in the cable.
4. Make sure a check valve is installed immediately above the
pump. Install additional check valves at 100' (30m) intervals.
5. Install a torque arrestor just above the pump to prevent
chafi ng the cable when pump and pipe twist during starting
and stopping.
6. Attach a safety cable to pump to prevent loss of pump if pipe
should break.
7. Place a sanitary well seal or pitless adapter with an
approved cover plate over top of well per manufacturers
recommendations.
8. Keep pump at least 5' (1.5m) from bottom of well and above
well screen or casing perforations.

ELECTRICAL INFORMATION

1. Employ a licensed electrician to perform the wiring. All wiring
must be done in accordance with applicable national and
local electrical codes.
2. Check that the power supply corresponds with the electrical
rating of the submersible motor and the control box (if
required). Make sure that the control box electrical rating
matches the motor electrical rating.
3. Every installation requires a fused disconnect switch or
circuit breaker.
4. Every installation must be grounded. There must be a reliable
ground connection between the pump and the distribution
panel. The motor lead incorporates a green grounding
conductor.
5. Lightning arrestors are recommended for every installation.
All stainless steel, single phase motors through 5HP
have built-in lightning arrestors. 3-phase motors require
a separate lightning arrestor installed as close to the
wellhead as possible. Install the arrestor in accordance
with manufacturer's recommendations. Lightning arrestors
provide protection against only induced voltage surges on
secondary power lines; they are not effective against direct
hits.
4
6. Mount the control box in an area protected from rain, snow,
direct sunlight, or other high temperatures as this may cause
tripping of the overload protector. Also protect the control
box from extreme cold (below 25
adverse effects on the starting capacitor.
7. A two-wire pump does not require a motor control box; all
electrical components are built inside the motor. Figure 2
shows a typical wiring diagram for a two-wire installation.
Circuit breaker or
fuse disconnect switch
Incoming 1-phase power
1-phase submersible motor
FIGURE 2
2-wire, 1-phase, 1/3 through 1-1/2 HP
Pump Wiring Diagram
8. A three-wire, 1-phase pump requires a motor control box
incorporating overload relays. Figure 3 shows a typical
wiring diagram for a three-wire, single-phase installation.
Note that a magnetic contactor must be used if the pressure
switch electrical rating is not suffi cient to handle the
submersible motor electrical rating. The pressure switch
would then be incorporated into a pilot circuit to control the
magnetic contactor. Make the connections at the control box
in accordance with the wiring diagram in the control box to
avoid damage to the motor.
Pressure switch for pilot circuit
(if magnetic contactor is used
for starting)
Circuit breaker
or fused disconnect switch
Incoming 1-phase power
Switch or timer (for direct switching) OR
magnetic contactor (w/pilot circuit)
3-wire, 1-phase, 1/3 through 15 HP
Pump Wiring Diagram
o o
F/-32 C) as this may have
Switch or timer
Submersible cable
Note: Order of red, yellow, and black may
vary from control box to control box.
Always connect like colors.
Single-phase
control box
L1 L2 R Y B
Red
Yellow
Black
1-phase sumbersible motor
FIGURE 3