Knight Equipment ATC-200 Installation Manual

ATC SERIES INSTRUCTION MANUAL

INTRODUCTION

Chemical feed applications for the Food and Beverage Sanitation Market
require a robust pumping system that can dispense a variety of corrosive
and non-corrosive chemicals with accuracy and repeatability. The Knight
Liquidtrol Series of pumps and controls merge the proven technology of air
operated double diaphragm pumps with modern microprocessor controls.

These new systems are designed for accurate point of use dispensing from
55 gallon drums, 330 gallon tote tanks or bulk tanks. Liquidtrol Air Pump
Timer Controls include a water tight injection molded case with built-in air
solenoid valve, pressure regulator, filter and fittings. Three types of controls
suited to a variety of chemical feed requirements are available.

THEORY OF OPERATION

The Liquidtrol Series Air Pump Timer Controls offer three control options for
starting, stopping and cycling an air pump. All systems have a power cord
and include a built-in step down transformer.

ATC-500 — This air pump “Limit Timer” control is designed to control the run
time of a pump with the press of a button or input of a signal from a powered
switch or remote controller. The water proof control cabinet is normally
mounted near the delivery point for the chemical, convenient for operators.
Typical delivery points include Gerry cans, buckets, floor scrubbers, portable
foamers or other receptacles. For applications where remote triggers such
as a CIP or Conductivity control signal are used, the controller can be
installed close to the signal source. Since the pressure regulator and air
solenoid are mounted with the control only air tubing is required between the
control and the chemical pump. This allows installation of the air pump far
away from the controller. The signal-input circuit accepts input voltages from
14-240 VAC.

ATC-500

ATC-200

ATC-200 — This air pump “Cycle Timer” triggers a continuous On-Off feed

cycle anytime power is applied to the power input. For continuous chemical
applications such as conveyor or track lubrication, the ATC-200 Cycle Timer
will feed from 0-2 minutes of ON time, with an OFF time from 0-90 minutes.

ATC-300 — This microprocessor based air pump control features a
programmable “Event Timer” capable of 20 individual feed events per day. A
built in 24 Hour Clock with real time battery back up keeps the event time on
schedule for every programmed feed event.

ATC-300

CAUTION: Wear protective clothing and eyewear when dispensing chemicals or
other materials. Observe safety handling instructions (MSDS) of chemical mfrs.

CAUTION: To avoid severe or fatal shock, always disconnect main power when
servicing the unit.

CAUTION: When installing any equipment, ensure that all national and local
safety, electrical, and plumbing codes are met.

0901103 Rev: E (11/08) Page 1 of 8

INSTALLATION OF AIR TIMER CONTROL

See diagram on the following page for illustration of the steps below.

(1) Mount the unit in a location that is convenient for programming, adjusting air pressure, and normal operation.

(2) Connect incoming air source to the inlet fitting using 3/8“ poly tubing. Max recommended pressure is 150 PSI.

(3) Connect the outlet fitting from the air solenoid valve to the air pump inlet port using 3/8” poly tubing.

(4) Use of an air-operated 2-way valve is recommended for installations where siphoning can occur. An example is

shown on the following page.

(5) Plug the power cord into a 115 VAC wall outlet — if necessary, the input voltage configuration can be changed

by moving the lead on the power cord from the 115 connection to either 208 or 230. You will also need to use an
adapter for the plug, or cut off the plug and hard wire to the power source.

OPERATION / START-UP

Consult Air Pump operation manual for mfr’s operating specifications.

(1) Make sure power and air supply are both ON.

(2) Manually activate the air pump using the prime button (or “start” button, depending on the model) on the front

cover of the ATC unit. Priming a “dry” pump may require you flood the pump suction with water. Suction line
should be no longer than 10 feet (3 meters).

(3) The air pump will typically be easier to prime when running at a slower speed. The speed and volume delivery of

the pump can be controlled by turning the regulator clockwise to increase pressure and counter-clockwise to
decrease pressure.

(4) Once the pump is primed, adjust the air pressure as needed to achieve the desired feed rate.

PROGRAMMING AND CALIBRATING THE AIR PUMP TIMER CONTROL

Pages 4 – 6 of this manual define the programming and operation of the various ATC models. See the page that
pertains to the model of ATC you have.

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INSTALLATION & WIRING DIAGRAM

0901103 Rev: E (11/08) Page 3 of 8