
2
Keep the area around the fan free of combustible materials in order to
prevent re or a skin burn(s).
To prevent the risk of damage to equipment, leave nothing around the
fan that would obstruct ventilation.
Do not touch the rotating parts (blades) when the fan is in operation.
This may cause injury. The use of the optional ngerguard is
recommended to ensure protection.
When an abnormality is noted, stop the operation immediately, or re,
electric shock or injury may occur.
The motor’s surface temperature may exceed
70 °C (158 °F), even under normal operating
conditions. If a fan is accessible during
operation, post the warning label shown in the
gure in a conspicuous position to prevent the
risk of skin burn(s).
Dispose the product correctly in accordance with laws and regulations,
or instructions of local governments.
Precautions for use
When using the fan with an inverter
When using the fan in combination with an inverter, use it by
setting below 60 Hz of the inverter frequency.
The inverter which input voltage exceeds 240 VAC cannot be used.
The insulation of the fan winding may deteriorate, causing damage
to the fan.
Number of fan poles: 2 poles
A resonance phenomenon may occur depending on the setting
frequency. If the resonance phenomenon occurred, use the product
with avoiding the resonance points.
Note
If•the•setting•frequency•is•lowered•when•an•inverter•is•
connected•to•the•alarm•type•fan,•the•fan•speed•may•slow•down,•
causing•an•alarm•to•generate.•
Note•that•the•low-speed•alarm•function•cannot•be•used•since•
the•alarm•signal•is•continued•to•output•if•the•fan•speed•remains•
at•a•speed•to•generate•the•alarm.
Preparation
Verify the model number of the purchased product against the
number shown on the package label. The fan model name is listed on
the fan nameplate.
zStandard type
MRS18-BH, MRS18-DH, MRS18-EH, MRS18-TH
zLow-speed alarm, electronic alarm type
MRS18-BMH, MRS18-DMH, MRS18-EMH, MRS18-TMH
zLow-speed alarm, contact alarm type
MRS18-BBH, MRS18-DBH, MRS18-EBH, MRS18-TBH
Note
Do•not•conduct•insulation•resistance•measurement•or•dielectric•
voltage-withstand•testing•between•the•primary•circuit•(coil)•and•
secondary•circuit•(alarm•circuit).•Doing•so•may•damage•the•
alarm•circuit.
Checking the product
Verify that the items listed below are included. Report any missing
or damaged items to the branch or sales ofce from which you
purchased the product.
For the supplied items in the fan set, refer to the separate “Package
item list.”
An alarm cable is supplied only with the fans with alarm.
Fan
□•Fan
□•Power•cable
□•Alarm•cable
□•OPERATING•MANUAL
••••••(this•document)
Fan•kit
□•Fan
□•Power•cable
□•Alarm•cable
□•OPERATING•MANUAL
••••••(this•document)
□•Mounting•screws
□•Finger•guard
or
Filter
How to identify the fan kit model
G: Finger guard
Mounting screws
F: Filter
Mounting screws
Fan model
Fan kit
Installation
Location for installation
Install it in a well-ventilated location that provides easy access for
inspection. The location must also satisfy the following conditions:
Inside an enclosure that is installed indoors
Operating ambient temperature
−30 to +60 °C (−22 to +140 °F) (non-freezing)
Operating ambient humidity 85% or less (non-condensing)
Area that is free of explosive atmosphere or toxic gas (such as
sulfuric gas) or liquid
Area not exposed to direct sun
Area free of excessive amount of dust, iron particles or the like
Area not subject to splashing water (rain, water droplets), oil (oil
droplets) or other liquids
Area not subject to continuous vibration or excessive shocks
Area free of radioactive materials, magnetic elds or vacuum
Area free of excessive electromagnetic noise (from welders, power
machinery, etc.)
When using near a switching circuit or high-frequency power
supply, the induced current may ow inside the fan due to
electromagnetic noise (conductive noise, radiative noise). If the
induced current ows, the electric corrosion is caused in the
bearings of the fan. As a result, it may generate the noise or shorten
the service life of the products. Use the fan in the environment that
the electromagnetic noise does not cause.
How to install the fan
Install the fan onto an appropriate at metal plate having excellent
vibration resistance and heat conductivity.
Drill mounting holes in equipment used, and secure the fan using
screws (not supplied).
Screw size: M5, tightening torque: 1.2 N·m (170 oz-in).
For air orientation and rotational direction, see the indications shown
on the fan’s side frame.