Xylem IM126R02 E-Z Prime Jet Pump Shallow Well Jet Pump - Manual (Page 6)

6
Section 4
Pressure Tanks and Piping
Standard Pressure Tank
When a pump is used with a standard pressure tank, it
must be connected to the tank using standard fittings. A
rubber isolator hose should be connected between the
pump and tank to reduce noise and vibration transmis-
sion during service. Install an air volume control in the
tank tapping and connect the 1/4-inch tubing to the
pump (see Figure 4).
Replacing A Standard Tank With A
Pre-charged Air Tank
Many times a defective steel tank must be replaced
with a pre-charged air tank to provide effective system
protection. Figure 5 should be followed for correct con-
nection to the system.
Because a pre-charged air tank is pre-charged with air,
it will always occupy less space than a standard tank for
similar amounts of pressurized water. Be sure to plug the
air port on a jet pump, as it is no longer necessary to sup-
ply air to the tank.
Adjusting Pre-charged Tank To System
Requirements
Pre-charged tanks are shipped with a standard pre-charge
of 18 psi for models ET6P and ET15P; 28 psi for models
ET45 and ET60. The pre-charge should be adjusted
according to the installation instructions packed with
the tank.
Figure 5: Pre-charged air tank. Figure 4: Standard pressure tank.
AIR VOLUME CONTROL
UNION
ISOLATOR HOSE
GATE VALVE
VALVE
PRESSURE
TANK
AIR
VOLUME
CONTROL
CONNECTION
"T" MANUAL
REGULATION VALVE
UNION
GATE VALVE
ISOLATOR
HOSE
SUCTION PIPE
SERVICE LINE
PRE-CHARGED
AIR TANK
Motor Voltage Change
The General Electric and Emerson jet pump motors both have a voltage change switch for ease of changing operating volt-
age from low (115 volt) to high (230 volt) operation. The GE switch must be pulled out, rotated and pushed in. The GE motor
switch is marked HI (for 230 v) and LO (for 115 v). The Emerson switch is a toggle that can be changed using a pen tip or a
small screwdriver. The Emerson motor switch is marked 115 and 230.
It is an industry standard procedure to ship 1 ⁄
2
hp motors wired at 115 volts, connecting them to a 230 volt
power supply will damage the motor windings, and/or the capacitor, and/or the overload protector. This
damage is easily diagnosed and will not be covered as a warranty failure.
Motors of 3 ⁄
4
hp and larger are factory wired for 230 volts. Connecting them to a 115 volt power supply without changing the
voltage switch will result in poor performance, noisy operation and overload tripping due to high heat.
CAUTION