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Frequestly Asked Questions

Frigitek FAQs

What Is Frigitek?
The Frigitek is an energy saving device designed for walk-in or industrial refrigerators and freezers.

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How does the Frigitek work?
The purpose of a refrigeration compressor and related equipment is to pump heat out of a box.

Often, more than 30% of that heat is generated by the evaporator fan motors. Frigitek reduces this heat load approximately 75-80% by lowering the voltage to the evaporator fan motors when the box is not being actively cooled. The result is a significant saving in operation costs.

The dramatic energy saving produced by the Frigitek have been confirmed by more than ten years of extensive laboratory and field testing and satisfied customers.

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Won't lowering the voltage to the fan motors cause the motors to overheat?
Lowering the voltage on a compressor motor, or any motor driving a fixed load,
will cause the motor to draw excess current and overheat.

But, lowering the voltage on a motor with a variable load, such as a fan, will not cause the motor to draw more current.

This is because, as the motor power is reduced, the motor turns slower, and the slower rotation of the fan reduces the load which the motor must drive.

Thus the motor does not draw more current.
Tests in our laboratory confirm that, when operating fan motors at lower voltages, they draw less current and produce significantly less heat.

This reduces the operating cost of both the fan motors and the compressor.

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Is Frigitek Safe?

The Frigitek does not interfere with the refrigeration cycle nor directly control the compressor, thus it cannot harm the compressor or any of the other equipment.

Because operation of the Frigitek causes the compressor duty cycle to be reduced, it can only have a beneficial effect on the equipment and should extend its life accordingly.

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Will the Frigitek interfere with the refrigeration system?

The Frigitek follows the thermostat's cycling of the system to control the speed of the fans in the evaporator coils, and does not directly affect any other portion of the refrigeration system.
The refrigeration system continues to function normally.

How much will the Frigitek save?

While there are a number of conditions that affect the amount saved by Frigitek in any particular installation, typical energy and cost savings are in the 25-35% range.

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Will the Frigitek cause icing?

The Frigitek will not contribute to any tendency for the evaporator coils to ice up. Because it operates the fans at high speed whenever the system is in cooling mode, the evaporator heat transfer characteristics are unchanged. In fact, the Frigitek has an Ice Sensor feature, which will continue to operate the fans at high speed if ice is detected in the coils.

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Will temperature stratification become a problem?

Extensive testing, and actual customer experience, verify that there is more than adequate air movement to prevent stratification with the fans running at low speed under Frigitek control.

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Are there any other benefits to using the Frigitek?

For certain applications, other benefits can equal or exceed that of energy savings. The reduced air movement extends the shelf life of perishables such as meat, fish, produce, pizza dough, and flowers, by slowing the dehydration process. In addition, the reduced running of the compressor will add to its lifetime, putting off the day that this expensive unit will need to be replaced. And, in large industrial warehouses, the reduced fan noise contributes to a safe work environment.

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How long will the Frigitek last?

The Frigitek should outlast your refrigeration system. Properly installed, there is no reason for it to fail under normal operation.

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How long does it take to install?

Installation time is typically about 45 minutes to one hour for Single-Phase systems, and may average two hours for Three-phase equipment. Only qualified persons, familiar with electrical wiring, should do the installation of the Frigitek.

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What is involved in the installation of the Frigitek?

For installation information, see the appropriate Single-Phase or Three-Phase manual elsewhere on this website.

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Does the Frigitek have a warranty?

A five-year warranty on all Frigitek equipment is found in the back of each owner's manual.

Voltage Control Guard FAQs

How does the VCG work?
1. The VCG unit attaches to each of your electrical panels, connecting to the neutral bus bar and safety ground. Once installed, the VCG unit immediately begins working. The VCG unit does not draw power and there are no lights, switches, capacitors, resistors, circuit boards or other electronic components to wear out.

2. As appliances and equipment are turned on, the demand for more current induces current from other equipment, and excess electricity flows back to the neutral side of the electrical panel.

3. With the VCG installed, excess current from the neutral does not return to your equipment, decreasing the demand for unneeded power. The VCG unit "cleans" the neutral side, reusing and recycling energy that would otherwise be wasted

The VCG1 takes energy from the noise in the current waveform and turns it into useful power

Energy is taken from frequencies outside the fundamental (60Hz)
Energy is returned in the fundamental (60Hz)

Device is pseudo-inductive

Inductors can change "current energy" into "voltage energy"
i.e. when the current changes in an inductor a voltage is created across the inductor

The motor startup plot.... Lots of noise in the current outside 60Hz

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AircoSaver FAQs

What is an AircoSaver?
It is a retrofit product that adds intelligence to air-conditioning systems, which saves KWh and extends compressor life.

Sensor driven software algorithms designed to detect thermodynamic saturation and optimize compressor run times.

Provides anti-short cycling; mandatory compressor off time after thermostat reaches set point (3 min) or loss of power (1 min).

Reduces equipment operating temperature and prevents evaporator freeze-over by properly cycling the compressor.

Constantly adapting its settings to inside demand requirements & outside weather conditions.

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