and 3-pole receptacles that accept
the equipment plug.
22. Use wire of adequate size to mini-
mize voltage drop at the motor.
Do not handle
pump or pump
motor with wet hands, when standing
on a wet or damp surface or when
standing in water. Fatal electrical
shock could occur.
Pump motor is
equipped with an
automatic resetting thermal protector and
may restart unexpectedly. Protector trip-
ping is an indication of motor overloading
because of operating pump at low heads
(low discharge restriction), excessively
high or low voltage, inadequate wiring,
incorrect motor connections or defective
motor or pump.
Pre-Installation
WATER SUPPLIES
The water supplies illustrated in Figure
15 are possible sources for water.
These water supplies can be divided
into two categories:
SURFACE WATER
Water from a lake, stream, pond and
cistern. This water is usually not fit for
human consumption, but may be suit-
able for washing, irrigation or other
household uses.
GROUND WATER
Water found in the water bearing stra-
tum at various levels beneath the earth.
Of all the fresh water found on earth
only 3 percent is found on the surface
and 97 percent is underground.
TANKS - CONVENTIONAL STORAGE
The function of the tank is to store a
quantity of water under pressure.
When full, the tank contains approxi-
mately 2/3 water and 1/3 compressed
air. The compressed air forces the water
out of the tank when a faucet is
2
Operating Instructions and Parts Manual
General Safety
Information
(Cont’d)
15.Make sure the line voltage and fre-
quency of electrical current supply
agrees with the motor wiring.
16. Do not attempt repairs to the elec-
tric motor. All repairs to the motor
must be completed at a licensed or
certified electrical motor repair
shop.
Do not touch an
operating motor.
Modern motors are designed to operate at
high temperatures.
17. Avoid kinking electrical cord and
protect electrical cord from sharp
objects, hot surfaces, oil and chemi-
cals. Replace or repair damaged or
worn cords immediately.
18. Keep fingers and foreign objects
away from ventilation and other
openings. Do not insert any objects
into the motor.
Risk of electric
shock! Never con-
nect the green (or green and yellow) wire
to a live terminal!
19. To reduce the risk of electrical
shock, the pump should be plugged
directly into a properly installed and
grounded 3-prong grounding type
receptacle, as shown in Figure 1.
The green (or green and yellow)
conductor in the cord is the ground-
ing wire. The motor must be secure-
ly and adequately grounded for
protection against shock.
20. Where a 2-prong is encountered,
replace the plug with a properly
grounded 3-prong receptacle in
accordance with the National
Electrical Code, local codes and ordi-
nances. To ensure a proper ground,
the grounding means must be test-
ed by a licensed or certified electri-
cian.
21. Use only 3-wire extension cords that
have a 3-prong, ground type plug,
opened. An air volume control auto-
matically replaces air lost or absorbed
into the water. The usable water, or
drawdown capacity, of the tank is
approximately 1/6 of the tanks total
volume when operated on a “20-40”
pressure setting (Figure 2).
TANKS - PRECHARGED STORAGE
A precharged storage tank has a flexible
bladder or diaphragm that acts as a barrier
between the compressed air and water.
This barrier prevents the air from being
absorbed into the water and allows the
water to be acted on by compressed air at
initially higher than atmospheric pressures
(precharged). More usable water is provid-
ed than with a conventional type tank.
Precharged tanks are specified in terms of
a conventional tank. For example, a 20 gal-
lon precharged tank will have the same
usable water or drawdown capacity as a
40 gallon conventional tank, but the tank
is smaller in size (Figure 2).
PRESSURE SWITCH
The pressure switch provides for auto-
matic operation. The pump starts when
pressure drops to a cut-in setting. The
pump stops when pressure reaches a
cut-out setting.
JCU50
Air Volume
Control
Type
Required
Well X
Precharged
No
PCA
Precharged
No
12P & 30 P Horizontal
Conventional
Yes
FX Horizontal
Precharged
No
CHART 1 - JET PUMP/TANK ASSEMBLIES
Air Volume
Control
Bladder
Conventional
Tank
Precharged
Tank
Figure 2 - Conventional & Precharged
Storage Tanks
Grounded Outlet
Grounded
Pin
Figure 1
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