General Description
The CycleFlo II is a pneumatic pump controller that allows precise control over the cycle rate of the pump and
therefor the flow rate.
The pump cycle is initiated by a 120 volt signal. The pump cycle may be initiated by some other piece of equipment
such as a timer or a pH controller. An isolation relay may be required in some installations. Always follow local and
applicable electrical codes. The CycleFlo II will halt the pump cycle whenever the 120 volt signal is removed.
Installation
Electrical Connections
An access hole with a strain relief installed has been provided for the external power connection. Due to the unique
requirements of each installation, access holes have not been provided for the other optional external wiring
connections such as the external air supply
valve signal. Have a qualified electrician
determine the proper strain relief, wire type, and
wire size for your particular application. When
positioning or adding access holes, be careful
not to damage any internal components. Failure
to use the proper strain relief, wire type and wire
size can cause damage to internal components
or personal injury.
Fire, Explosion, and Electric Shock
Hazard
To reduce the risk of fire, explosion, or electric
shock:
• The power source conduit is not an
adequate grounding for the system. The
unit must be grounded to a true earth
ground.
• A qualified electrician must complete all
grounding and wiring connections and
check the resistance.
• Refer to your local code for the
requirements for a “true earth ground” in
your area.
There are three connections on the 120V input
signal terminal block (see Fig. 1). The two right-
hand connections are for line and neutral wires
respectively. The left-hand connection is for a
true earth ground.
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