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Fans - Technical Information

Fan Selection Method

1. Calculation of Required Airflow for Cooling

2. Selecting a Fan

Using the airflow calculated with the above equation, generally select a fan with 1.5 to 2 times the required airflow.

Select a size with maximum airflow of 1.70 (m3/min) or more, which will fit within equipment, from the catalog.

Fan Mounting Method

There are two types of fan mounts: with or without ribs.
Note that DC fan resin frame products come in two types: frame mounts with ribs and those without them.
When screw-fixing the resin frame DC fan without rib type, fix it to one flange.

Waterproof Fans

IP Protection Class Display

Explanation of 1st Digit

Protection against ingress of human body parts and solid foreign objects
1st Digit	Content	Protection Degree
0	No protection	Not protected.
1	Protection against solid objects larger than 50 mm	No danger of accidental contact with internal live parts or moving parts for any large surface of the body, such as hands. Solid objects with diameter larger than 50 mm cannot enter.
2	Protection against solid objects larger than 12mm	No danger of contact with internal live parts or moving parts for fingertips or similar objects with length less than 80 mm. Solid objects with diameter larger than 12mm cannot enter.
3	Protection against solid objects larger than 2.5mm	No ingress for tips of solid objects such as tools or wires with diameter or thickness larger than 2.5 mm.
4	Protection against solid objects larger than 1.0mm	No ingress for tips of solid objects such as wires or copper bands with diameter or thickness larger than 1.0 mm.
5	Dustproof Type	Prevents ingress of dust into interior. Dust will not enter in sufficient quantity to interfere with normal operation.
6	Dustproof Type	No ingress of dust into interior.

Explanation of 2nd Digit

Protection against ingress of water
2nd Digit	Content	Protection Degree
0	No protection	Not protected.
1	Protection against dripping water	Dripping water shall have no harmful effect.
2	Protection against dripping water at a 15° angle	Vertically dripping water shall have no harmful effect when tilted at an angle up to 15° from normal mounting position.
3	Protection against spraying water	Water falling as a spray at an angle up to 60° from the vertical shall have no harmful effect.
4	Protection against splashing water	Water splashing from any direction shall have no harmful effect.
5	Protection against jetting water	Water directly jetting from any direction shall have no harmful effect.
6	Protection against waves	Waves or water powerfully and directly jetting from any direction shall have no harmful effect.
7	Protection against immersion in water	Immersion in water at the regulated pressure and time shall have no harmful effect.
8	Protection against deep immersion in water	Applies to continuous immersion in accordance with conditions regulated by the manufacturer. Refers as a general rule to totally sealed structures.

Since the fan motor uses precision ball bearings, take care in handling so as to avoid impacts.
Dropping it, knocking it over, or applying impact may cause damage leading to abnormal noise or decreased lifetime.
Always ground the AC fan ground wire. (Otherwise, electric shock may result)
Make sure the wiring is correct. (Otherwise, fire or electric shock may result)
Do not touch the blades during operation. (Otherwise, injury may result)
Turn the power OFF if fire, smoke, or abnormal noise is emitted during operation. (Otherwise, fire or electric shock may result)
Never disassemble or modify the product. (Otherwise, fire or electric shock may result)
When cleaning, do not use volatile organic solvents such as thinner, alcohol, or benzine. (Otherwise, damage or discoloration may result)
Do not use in an environment exposed to volatile organic solvents or corrosive gases, etc. (Otherwise, damage may result)
When touching the rotating parts with fingers or objects, mount a finger guard, etc.
When mounting the finger guard and filter kit, install properly so that they do not come into contact with the blade.
Do not damage, tug, or apply excess stress to the lead wire.

Drip-proof DC Fan (IP56 Type)

Although the protection grade is IP56, as it is not completely waterproof, do not use it in an environment where there is a large amount of mist or water vapor. (Otherwise, damage may result)

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