© Copyright 2014 Zoeller Co. All rights reserved.
© Copyright 2010. All rights reserved.
5
IMPORTANT:
Pump is built to handle clear water only; it is not designed to
handle water containing sand, silt or other
abrasives.
1. Refer to Figure 4 for typical
installations.
To reduce the
chance of water hammer, do not use
swing/flapper type check valves. A spring-
loaded or similar type check valve is
recommended.
2. Bolt pressure booster system to a
secure foundation.
3. Locate the pump so that there will
always be a positive supply of water to
the pump (See Figure 4).
4. For service convenience, the installer
is recommended to add gate valves
and unions as needed to provide for
easier maintenance.
5. Pressure gauges on the inlet and
outlet, provided by the installer, are
recommended to show if sufficient
water is being supplied to the pump
and to show service pressure.
WIRING
1. Install ground wire and maintain this pump in accordance with your local electrical
code and all other codes and ordinances that apply. Consult your local building
inspector for local code information.
IMPORTANT:
Check local and/or United States National Electrical Codes for proper
grounding information.
Do not ground to a gas supply line.
2. Connect ground wire first; then to grounding terminal provided on the control box,
identified as GRD or . Ground connection MUST be made to this terminal. Do
not connect motor to electrical power supply until unit is permanently grounded;
otherwise serious or fatal electrical shock hazard may be caused.
3. Connect the other end of the ground wire to a properly grounded service panel or
to a control panel ground bar if it is connected to the power supply ground.
4. Connect the two red wires from the control box into the two black and orange wires
on the flow sensor.
5. Specific Wiring Procedure (Refer to Figure 5 and Minimum Wire Size Chart B).
a. The 1/2 and 3/4 HP single phase pumps are factory connected for 115V at the
motor.
b. The motor wiring diagram in Figure 5 is located on the motor label of the
pump.
Replace rear access cover before starting or operating pump.
Failure to do so can result in personal injury.
IMPORTANT:
Do not use an extension cord or splice wires. Joints should be made
in an approved junction box. If the above information or the following wiring diagrams
are confusing, consult a licensed electrician.
MOTOR PROTECTION
All single phase motors have built in thermal protection for all voltages. The overload
protects the motor against burnout from overload of low voltage, high voltage and
other causes. The device is automatic and resets itself once the temperature has
dropped to a safe point. Frequent tripping of the device indicates trouble in the motor
or power lines and immediate attention is needed.
Disconnect power supply and depressurize system before
servicing pump or removing any component.
Figure 4 - Pump used to boost incoming city pressure (automatic operation).
From municipal
Pressure Switch
Control
Box
Isolation
Valve
Flow Switch*
(To be Mounted
w/Wires Facing
Up)
To Service
Check
Valve
Figure 5 - Wiring Diagram for Single Phase
1/2 - 3/4 HP Motors.
Voltage
Switch
Power
Input
Motor
Input
Ground
Flow Sensor
Wires
System Override Switch
Pump will run for 30
seconds when pressed
115
Figure 6 - Control Box
INSTALLATION
IL0531
IL0512
115 Volts
Single Phase
Line
L1
L2
A
B
Y
E
L
L
O
W
W
H
I
T
E
G
R
A
Y
R
E
D
T
A
N
IL0180
*Note: Plastic
fl ow switch
is illustrated
above. Models
that include
the brass fl ow
switch have in-
line orientation.
IMPORTANT:
Pump is built to handle
clear water only; it is not designed to
handle water containing sand, silt or
other abrasives.
1. Refer to Fig. 4 for typical installations.