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High-pressure blowers

Safety Precautions for 70DCF

  • Thank you for adopting a MinebeaMitsumi product.
  • For proper use, please carefully read this Instruction Manual and other supporting documents before usage (installation, operation, maintenance, inspection).
  • Do not use until all technical/safety information and reminders are fully understood.
  • Keep the Instruction Manual in an accessible place for ready reference and also make sure that it is delivered to end customers.
General notes
  • This product was developed for use in industrial equipment. Do not use for equipment in areas which require a high degree of reliability and safety such as aerospace equipment, trunk-line communication equipment, nuclear control equipment, life support machines, automobiles, traffic signals, medical devices, and so forth.
  • MinebeaMitsumi will take no responsibility for failures which arise from false or inappropriate use of the product, such as not complying with product usage conditions and precautions depicted in the specifications (drawings) and instruction manual. Please request a reference drawing or delivery specifications to confirm.
  • Due to performance upgrades and production reasons, the product specifications, exterior, and configurations described in these specifications are subject to change without prior notice.
  • Do not use it in outdoor.
  • In this <Safety Precaution>, the safety precaution levels are classified as "WARNING" and "CAUTION."
Indicates a potential situation that could result in death or serious injury to user if device is operated improperly.
Indicates a potential situation that could result in injury to user or physical damage if device is operated improperly.
In order to use the product correctly, can be found in items under this heading, the matters that have to be followed strictly.

In addition, some items that are listed in the CAUTIONCAUTION may lead to serious results depending on the situation.

WARNINGWARNING : 1. Precautions against electrical shock
  • Do not modify or disassemble this product. Doing so may cause electrical shock.
  • Before conducting wiring operations and inspection, confirm that no voltage is present at the driver terminal using a tester or the like 10 minutes after the power supply is turned OFF.
  • Conduct a C-class(earth resistance 10 Ohm or less) or higher earth connection for the blower and driver.
  • Wiring work and inspection should be performed by a professional engineer (a Second Class Electrician or higher is recommended).
  • In order to prevent electric shock and injury, conduct wiring after the main body is set in place.
  • In order to prevent electric shock, avoid touching the blower and driver with wet hands.
  • In order to prevent electric shock, do not damage, forcibly pull, place heavy objects on, or pinch the blower cable.
  • In order to prevent electric shock, do not connect or disconnect the blower connector while AC power is being supplied (during Operation and Stand-by).
CAUTIONCAUTION : 2. Precautions against fire
  • In case of blower or driver malfunction, cut off the power supply. Continuous flow of a large amount of current may cause fire.
  • Do not connect the control I/O connector to the AC power supply. Doing so may cause fire.
  • Do not block the vent hole and the air inlet of the driver. Doing so may cause fire.
  • Do not use with the air inlet or outlet of the blower completely blocked. Doing so may cause fire.
  • Please do not use in the state that could block the vent hole of the blower. This can cause a fire.
  • Please do not place flammable materials around the blower.
WARNINGWARNING : 3. Precautions against failure
  • Please do not put your fingers, hands absolutely the air inlet or outlet of the blower. There is a risk of injury.
  • Please do not put your fingers, hands absolutely to the inside from vent hole of the blower. There is a risk of electric shock or injury.
CAUTIONCAUTION : 3. Precautions against failure
  • Do not apply voltage other than the rated voltage specified for each terminal. Doing so may result in burst or damage.
  • Do not mix up the terminal connections. Doing so may result in burst or damage.
  • Do not reverse the polarity (+, -). Doing so may result in burst or damage.
  • Do not touch the blower and driver while power is turned on or for a while after power is turned off as they may be hot. Doing so may result in burns.
  • Please keep tools or foreign substances away from the blower's inlet/outlet, vent hole or driver's inlet and vent hole to prevent interfusion of foreign substances, injuries from foreign substance's damages or damages of the blower.
  • Please be careful so as not to be sucked foreign substances into the inlet.
WARNINGWARNING : 4. Miscellaneous Precautions

Please pay adequate attention to the following precautions. Improper handling may cause unexpected accident, electrical shock, or injury.

  • The blower does not have explosion-proof construction. Operating in an explosive or flammable gas atmosphere may cause explosion with motor's burnout.
  • Installation, connection, run, operation, inspection, fault diagnosis should be attempted by qualified persons. Otherwise, it may cause fire or injuries.
CAUTIONCAUTION : 4. Miscellaneous Precautions

Please pay adequate attention to the following precautions. Improper handling may cause unexpected accident, electrical shock, or injury.

(1) About transportation and mounting

  • Transport the product using a correct method that corresponds to the product weight. Failure to do so may cause injuries.
  • Do not stack blowers and drivers three or more stages.
  • Install blower using the main frame mounting feet. Do not install directly on air inlet or outlet.
  • Install driver using the main frame mounting feet. Do not mount in any direction other than that indicated in drawings.
  • Installation should be made on a structure that can withstand the product weight and vibration.
  • Do not operate with a damaged blower or driver installed.
  • Do not hold cover or lead wire during active operation. Doing so may result in damage.
  • Do not step on or place objects on the product.
  • Direction of the blower duct (exhaustion and suction) must conform to the specified requirements.
  • If the blower is installed without ducting on the inlet and outlet, directly used in ambient air, an appropriate protection frame or screen must be applied to the inlet and outlet to ensure safety.
  • Prevent conductive objects such as screws and metal pieces and flammable objects such as oil as well as other foreign objects that can disturb the rotation of the blower from entering the inside of the blower and driver.
  • As the blower and driver are precision instruments, do not drop or apply unreasonable force.
  • Please use under the environmental conditions given below. Usage under other environmental conditions may lead to malfunction.
    • Ambient Temperature: 0 deg.C to +50 deg.C (no freezing)
    • Ambient Humidity: 5 ~ 80 % RH (no condensation)
    • Storage Temperature: -20 deg.C to +65 deg.C
    • Other conditions: To be used indoors. No corrosive gases, flammable gases, oil mist, powder, or dust.
    • Altitude above sea level: 1000 m or lower.
    • Vibration: Do not expose to continuous vibration or excessive shock.
  • Do not use in a closed area. Use in a well-ventilated area.

(2) About wiring

  • Connect load (ACL) and neutral (ACN) of the AC power supply input correctly.
  • Both of the blower and the driver should be connected to FG terminal with ground connection(C or more).
  • Do not apply AC power to the FG terminal.
  • In order to protect the Blower, connect a Current Overload Protection device (a breaker or an electromagnetic switch) of 20 A to the device.
  • Do not conduct an insulation resistance test or a dielectric strength voltage test.

(3) About trial operations

  • Consider how to prevent malfunction of the blower and driver from affecting other devices.

(4) About usage

  • The driver and blower, should be used at the specified combination. Failure to do so may result in fire.
  • Do not apply AC power while a control input signal is being provided. Doing so will cause the blower to restart suddenly.
  • Do not start/stop blower using the braker or the electromagnetic switch of the AC power supply. Always precede start/stop with a control input signal.
  • Reduce the effects of electromagnetic disturbance by placing a noise filter near the blower.
  • In using the blower in state of almost closed outlet's condition, the air temperature from the outlet rises. Please check the temperature and use within its specification.
  • In normal operation, sometimes the temperature of the motor's surface rises over 70 deg.C.
    Please attach the motor to the appropriate place so as not to be affected by other device's heat.
    Please use in a place with good ventilation. Do not touch the motor and the driver during the operation of the blower and just after operating.
  • In using without connecting duct, the high frequency noise is occasionally made from the inlet by its resonance. In this case, please use a hose for connecting to the duct.
  • For the inlet, do not use in alomost closing consition.
  • Please be sucked only air.
  • When the air of relative humidity of 100% is sucked, condensation occasionally appears due to change of the temperature. There is a possibility that the drops are leaked out by sucking the air. The part of the motor with dewing may lead to electric leakage or burnout. Repeating condensation may cause getting rusty on the component materials. In some cases, it may shorten the blower's duration.

(5) Measures in case of abnormality

  • Install an emergency stop device so that the machinery, equipment is not in danger blower can also fail.
  • If the blower's protection device is activated, after making sure the cause of its error has been got rid of, turn on the power again.

(6) About Maintenance and Inspection

  • Perform the contents below at least once a year.
  • Check for abnormalities (such as abnormal noise) while the device is in a running state.
  • If dust is attached to the vent hole, air inlet, or Driver cover, remove it.
  • The temperature of each part has risen just after the operation.
    Please touch the blower after checking temperature has fallen sufficiently so as not to get burned.

(7) About storage

  • The storage period should not exceed 6 months.
  • The packaged Blower should be stored indoor in more less stable temperature and dry places.
  • For the installed blower, please be careful not to be affected by the water from the outside, oil, dust, vibration or heat.

(8) About disposal

  • Please treat as general industrial waste.

(9) Operating Precautions

  • If an unusual noise or smell is noticed, immediately terminate the AC power supply and control input signal, stop usage, and then contact your dealer.

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