
• The motor’s surface temperature may exceed 70 °C, even
under normal operating conditions. If a fan is
accessible during operation, post the warning
label shown in the figure in a conspicuous
position to prevent the risk of burns.
• When disposing of the fan, treat it as ordinary industrial waste.
Preparation
To verify that the unit you’ve purchased is the correct one,
check the model number shown on the identification plate.
Report any incorrect or damaged item to the branch or
sales office from which you purchased the product.,
MU1428S-11N, MU1428S-41N, MU1428S-51N,
MU1238A-11BN, MU1238A-21BN, MU1238A-41BN,
MU1238A-51BN, MU1238B-11BN, MU1238B-21BN,
MU1238B-41BN, MU1238B-51BN, MU1238L-11BN,
MU1238L-21BN, MU1238L-41BN, MU1238L-51BN,
MU1225S-11N, MU1225S-21N, MU1225S-41N,
MU1225S-51N, MU1225M-11N, MU1225M-21N,
MU1225M-41N, MU1225M-51N, MU1025S-11N,
MU1025S-41N, MU1025S-51N, MU1025L-11N,
MU925S-11N, MU925S-21N, MU925S-41N,
MU925S-51N, MU925M-11N, MU925M-21N,
MU925M-41N, MU925M-51N, MU825S-13N,
MU825S-23N, MU825S-43N, MU825S-53N,
MU825L-13N
Installation
■Location for installation
The fan is designed and manufactured for installation in
equipment.
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 (provide vent
holes)
• Operating ambient temperature
-10 to +60 °C (+14 to +140 °F) (non-freezing)
• Operating ambient humidity 85%, maximum
(non-condensing)
• Area that is free from an explosive nature or toxic gas
(such as sulfuric gas) or liquid
• Area not exposed to direct sun
•
Area free of excessive amount dust, iron particles or the like
• Area not subject to splashing water (storms, water
droplets), oil (oil droplets) or other liquids
• Area not subject to continuous vibration or excessive
shocks
• Area free of radioactive materials, magnetic fields 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 flow inside the
fan due to electromagnetic noise (conductive noise,
radiative noise). If the induced current flows, 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 flat metal plate having
excellent vibration resistance and heat conductivity.
See the panel cut-out, mounting-hall reference drawing for
information on how to provide mounting holes on the
equipment used and secure the fan with screws (not
supplied).
For air orientation and rotational direction, see the
indications shown on the fan's side frame.
Model Screw size Tightening torque
MU925 type M3 0.4 N·m (3.5 lb-in)
Other MU series M4 0.6 N·m (5.3 lb-in)
Fans come with grounding screws (M4, P0.7).
Wiring diagrams
Lead wire type
(MU825 type)
Power
supply
PE
Terminal type: 2-terminal type
(MU series other than MU825 type)
Input terminal
Power
supply
PE
Note
Use an optional plug code (sold separately) for the
terminal fan. If the plug code is not used, be sure to
properly insulate the terminal.
Overheat protection
Impedance protection means the fan will not burn out in
the event of a lockup.
• Unauthorized reproduction or copying of all or part of this
manual is prohibited.
• Characteristics, specifications and dimensions are
subject to change without notice.
•
and are registered trademarks or
trademarks of Oriental Motor Co., Ltd., in Japan and other
countries.
© Copyright ORIENTAL MOTOR CO., LTD. 2005
Warning label
• Please contact your nearest Oriental Motor office for further information.
Technical Support Tel:(800)468-3982
8:30 A.M. to 5:00 P.M., P.S.T. (M-F)
7:30 A.M. to 5:00 P.M., C.S.T. (M-F)
E-mail: techsupport@orientalmotor.com
www.orientalmotor.com
Headquarters and Düsseldorf Office
Tel:0211-52067-00 Fax:0211-52067-099
Munich Office
Tel:089-3181225-00 Fax:089-3181225-25
Hamburg Office
Tel:040-76910443 Fax:040-76910445
Tel:01256-347090 Fax:01256-347099
Tel:01 47 86 97 50 Fax:01 47 82 45 16
Tel:02-93906346 Fax:02-93906348
Tel:(02)8228-0707 Fax:(02)8228-0708
Tel:+65-6745-7344 Fax:+65-6745-9405
Tel:(03)22875778 Fax:(03)22875528
KOREA
Tel:080-777-2042 Fax:02-2026-5495
Headquarters Tokyo, Japan
Tel:03-6744-0361 Fax:03-5826-2576
Tel:+66-2-251-1871 Fax:+66-2-251-1872
Tel:400-820-6516 Fax:021-6278-0269