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Frequently Asked Questions

  CO2-Blasting Advance Cleaning Technology
  ػó»Ѵѧҹ FRIGITEK ӧҹҧ

CO2-Blasting Advance Cleaning Technology
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1. What is CO2 blasting?
2. How does it remove contaminants?
3. How does this differ from how sandblasting works?
4. What happens to the dry ice once it strikes the surface?
5. What happens to the contaminant?
6. Does the process damage the substrate?
7. Can CO2 be used to clean hot online?
8. Does the CO2 cool the substrate?
9. Will the temperature drop damage the hot mold?
10. Will the process create condensation?
11. How is dry ice made?
12. How are dry ice pellets made?
13. Are there advantages to Cold Jet pelletizers?
14. How is block dry ice converted to blastable granules?
15. Does block dry ice have advantages over pellets?
16. Are there differences in the cleaning effectiveness of dry ice pellets vs. the granules produced by the SDI-5?
17. How do Cold Jet pellet blasters compare to the competition's?
18. Are some dry ice pellets better than others?
19. Why is pellet uniformity important?
20. What is the difference between a one-hose system and a two-hose system?
21. How did the dry ice blasting technology originate?
22. What other advances has Cold Jet Alpheus brought to the industry?
23. How much air will I need to clean effectively?
24. What blasting pressures are possible?
25. How much dry ice should I expect to use?
26. Can I vary the dry ice consumption rate?
27. How do I store my dry ice?
28. Are the portable blasting units easy to move around?
29. Will I need an air dryer?
30. What other equipment will I need?
31. How much regular maintenance is required?
32. What are the best cleaning applications for CO2?
33. How is dry ice blasting used in foundries?
34. What are some successful rubber molding applications?
35. How is CO2 used in the food industry?
36. What are some examples of applications where CO2 does not work well?
37. Can CO2 be used to remove paint?
38. Will CO2 remove greases, oils, or weld slag?
39. Can CO2 be used to remove rust?
40. Will CO2 clean glass?
41. Can CO2 be used to clean wood?
42. Does CO2 replace sandblasting / bead blasting / water blasting, etc.?
43. What are the primary safety issues relating to the use of dry ice blasting systems?
44. Is the system noisy?
45. Do the contaminants or dry ice particles ricochet?
46. Does the process generate static electricity?
47. What should I do if my blast hose is cracked?
48. Is it okay to blast in an enclosed area?
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ػó»Ѵѧҹ FRIGITEK ӧҹҧ
What is the Frigitek?
The Frigitek is a solid state energy saving device designed for walk-in refrigerators and freezers.

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 chamber 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 four years of extensive laboratory and field testing.

Wont lowering the voltage of 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 motor laboratory confirm that operating the motor at a lower voltage does not cause the motor to draw more current or overheat. In fact, when the Frigitek slows the motors down, they produce less heat than at full speed. This is one of the savings provided by the Frigitek.

Where can I use the Frigitek?
The Frigitek is designed to be used on walk-in refrigerators and freezers typically found in food-service businesses, florists, and markets. Reach-in coolers with storage behind the doors can also benefit from the Frigitek. It is not applicable to HVAC systems, home air-conditioners, or small, stand-alone reach-in boxes.

Is the Frigitek safe?  
Because the Frigitek does not interfere with the refrigeration cycle nor directly involve the compressor, it cannot harm the compressor or any of the other equipment. Because the compressor duty cycle is reduced, it can only have a beneficial effect on the equipment and should extend its life accordingly.

Will the Frigitek interfere with any of the Refrigeration Components?
The Frigitek only controls 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.

What is my return on investment?
The actual dollar savings resulting from use of the Frigitek will depend on the cost of electricity in your area. For an electricity cost of 12 cents per kilowatt-hour, typical payback time is about 18 months.

How long does it take to install?
Installation time is typically about 45 minutes to one hour. Only qualified personnel, familiar with the electrical wiring and the operation of refrigeration systems should do the installation of the Frigitek.

What is involved in the installation of the Frigitek?
The Frigitek is typically installed on the outside of evaporator coil case, and the wires run through two small holes, to be connected to appropriate points inside the case. A mounting template is included to guide in the placement of the Frigitek and the mounting holes. A Tee sensor is connected to the solenoid coil, and a small interconnect cable run from the Tee to the Frigitek. An Ice Sensor is inserted into the evaporator coil near the refrigerant entrance point, and its wires connected to the Frigitek. More details are available in the Frigitek Installation Manual, which is available elsewhere on the website.

Does the Frigitek have a warranty?  
The Frigitek Evaporator Fan Controller is warranted for five (5) years from the date of purchase against defects in materials and workmanship. ECE will repair or replace any defective unit with a new or refurbished unit, free of charge, subject to conditions indicated in the owners manual.

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, even after the refrigeration system has returned to idle mode. Because of the Frigiteks Ice Sensor feature, any evaporator icing is dealt with immediately and automatically, rather than waiting for it to be noticed by personnel.

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.

How long will the Frigitek last?
The Frigitek should outlast your refrigeration system. It contains all solid-state electronic circuitry, and has built-in safeguards against failures. Properly installed, there is no reason for it to fail under normal operation.

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.

What options does the Frigitek have?
1. A special Y cable is available to allow two Frigiteks to operate from one Tee sensor. This is used in systems where one solenoid valve gates refrigerant to two evaporators.

2. A special high-current Tee Sensor is available for installations where the system status must be sensed from the current in a compressor power wire. This Tee will handle up to 25 Amperes of current.

Will the Frigitek work on 3-phase fan motors?
We now have after two years of research and development a 3-phase system for use in commercial and industrial cold storage warehouse facilities. It is ideally situated for refrigerated and freezer applications. The energy savings is comparable to or even greater than our single phase units.

What voltages are useable with the Frigitek?
The Frigitek is available in 120 VAC and 208-240 VAC single-phase versions. Each voltage version is available with current ratings of 3.5, 6, 12 and 25 Amperes.

How can I use the Frigitek with pressure-controlled or CPC systems?  
Refrigeration systems employing TXV (Thermal Expansion Valve), AXV (Automatic Expansion Valve), or other pressure-controlled regulation of the cooler temperature must be modified to work with the Frigitek. Because the Frigitek must sense some electrical activity to indicate whether the system is in cooling mode or idle, it cannot detect this status in pressure-controlled systems.

The easiest conversion to allow installation of a Frigitek is to add a standard thermostat and solenoid valve to the system. This will allow the Frigitek to operate normally, and may even solve some other maintenance problems with the cooling system.

The Frigitek is not applicable to CPC systems, or any system which uses modulated or variable expansion valves, unless the system can be converted to standard thermostat / solenoid valve operation. Typically, the CPC systems are used in coolers which require very tight temperature control, and cannot be converted.

How can I get a Frigitek?
Check our Polysoure Store near you for a representative in your area. If none is yet available, contact us directly.

Are there discounts available?
For dealers and distributors, an attractive discount program is offered. For end-users, discounts will depend on the quantity of Frigiteks purchased. Contact our office for specific information.

Contact : Technical Consultant  09-4448875 for further information.
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