Muto Denki Scroll Blower User manual

Sep. 2017
Muto Scroll Blower
Instruction Manual
Muto Denki Corporation
Headquarters: 751,NishiHassaku-cho, Midori-ku,Yokohama,Kanagawa,Japan226-0024
TEL:[phone], FAX:[phone]
OsakaBranch: 4-14, Toyosaki3,Kita-ku,OsakaCity,Osaka,Japan531-0072
TEL:[phone], FAX:[phone]
ChinoPlant: 11400-1107,Aza Harayama,Tamagawa,ChinoCity,Nagano, Japan391-0011
TEL:[phone], FAX:[phone]
web: http://www.mutodenki.co.jp e-mail: [e-mail]
Read thismanualcarefullybeforeusingtheproduct.
Wrongoperationsdeviating fromthis manualmay lead toserious accidents ordamages.
Keepthismanualconvenientlocationforeasyaccess.
TMB-048E-04

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Table of contents
1. Introduction·········································································· 3
2. Safety precautions·································································3
3. Receiving Checkups ····························································· 5
4. Transportation and Handling···················································· 5
5. Storage ··············································································· 5
6. Installation············································································ 5
7. Piping·················································································· 6
8. Connection to Power and Test run ············································ 6
9. Precautions for Operation ······················································· 6
10.Maintenance ········································································ 7
11.Troubleshooting ···································································· 8
12.Instruction for Disassembly and Reassembly······························ 9
13.Structural drawing·································································· 10
14.Motor·················································································· 11
15.Inquiry················································································· 11
16.Limited Warranty··································································· 11

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1. Introduction
Thank you forpurchasing theMutoScrollBlower.
Thismanual contains theinformation youneedforhandling,installing,operating and maintaining your
new equipment correctly, to ensure trouble-free operation and long service life. Please read it
thoroughly. Afterreadingthismanual,keepitinconvenientplaceforeasyaccess.
2. Safety precautions
Before starting any work such as handling, installing, operating and maintaining, carefully read this
manual and all documents attached to the product for proper use. Use the product after thorough
understandingofallproductinformation, safetyinformationandprecautions.
Inthismanual,safetyprecautionsareclassified as “Warning”and“Caution”.
Thistagindicatesthatwrongoperationorusemayleadtofatal lossor serious
injury.
This tag indicates that wrong operation or use may lead to human injury or
lossofproperty.
Eventheitemsunder mayleadto seriousresultsdependingonthecircumstances.
Those precautions include very important information and it is strongly recommended to follow them
strictly.
(Place toinstall ）
⚫The product with non-explosion proof type motor shall not be installed in explosive or
inflammable atmospheres. Under those atmospheres, install the product with explosion proof
type motor conforming to the degree of danger in that place. Otherwise injuries, explosions or
firesmayoccur.
(Gas)
⚫Unless otherwise agreed separately, the product can handle only normal air. It is cannot be
handled any other gas (explosive, toxic, corrosive, high temperature and so on), liquid or solid
materials. Otherwiseinjuries,explosionsorfires mayoccur.
(Wiring)
⚫Refer to the instruction manual of motor. Otherwise fires, electrical shocks or explosions may
occur.
⚫Do not touch the wiring. Shut off the power before checking the wiring. Otherwise electrical
shocksmayoccur.
(Operation)
⚫Do not getclose to or look into theopeninletoroutlet manifold during the product is running as it
isverydangerousas follows.
Inlet : Clothing which you are wearing or a part of your body will be sucked in. As a result,
injuriesmay occur.

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Outlet:Astrongwindorflown thingsmaycauseinjuries.
⚫Do notinsert finger(s) or hand(s) into the opening ofthesafety covers such as external fancover
and cooling fan cover. Do not remove the safety cover during the product is running. Otherwise
injuriesmayoccur.
⚫Shutoff the mainpowerswitchin case ofpowerfailure.Otherwiseinjuriesmayoccur.
(Safety components)
⚫The productisshippedwith metalmeshattachedto theinletandoutletmanifold,orotherwise the
optional parts are included. If these parts are removed by some reason, take equivalent safety
measures. Otherwiseinjuriesmayoccur.
(DisassemblyandReassembly)
⚫Beforedisassemblyandreassembly,make suretoshutoffthemainpower and preventpower to
be turnedon. Otherwiseinjuriesorelectricalshocksmayoccur.
( Others )
⚫Follow thelabels attached totheproduct. Otherwiseserious resultsmayoccur.
(Transportation )
⚫Check the mass of the product with the specifications, drawing or catalogue before
transportation, and be careful not to drop or tip over the product during transportation. Otherwise
injuriesorbreakagesmay occur.
(Installation)
⚫Remove all of the inflammable from the productanditsvicinity.Otherwise firesmayoccur.
⚫Ventilate the room to keep the ambient temperature below 40 deg.C. Otherwise burns, fires or
bearing-damagemay occur.
(Operation)
⚫If the product has high temperature label, do not touch the product with body or hand during the
product is running. Take safety measures such as enclosing by fence or net. Otherwise burns
mayoccur.
⚫If any abnormalities are found, stop the machine immediately. Otherwise injuries, electrical
shocksorburnsmay occur.
⚫Operatethe blowerin correctdirection forrotation. Otherwise breakages may occur.
(DisassemblyandReassembly)
⚫Disassembly and reassembly should be done by experts. Otherwise injuries or breakages may
occur.
⚫Do not use the parts of this product on other equipment. Do not use unauthorized parts for the
product. Otherwiseinjuries or breakagesmayoccur.

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3. Receiving Checkups
Check if the products you have received are what have been ordered by referring to the order sheet,
drawings,invoices,etc.
(1) Check the nameplates on the blower and themotor, and confirm ifitmatches what have been
ordered.
(2) Countthenumberoftheproduct,andconfirmifitagreeswithwhat havebeenordered.
(3) Confirmthatthereisno breakageduring transportation.
4. Transportation and Handling
When transporting the blower, lift the casing and the motor together. Be careful not to give shocks to
anyparts ofthe blower.
5. Storage
Iftheblowerisstoredbeforeinstallation,becarefulas follows:
(1) Store the blower in a room where ventilated, not humid nor dusty. Otherwise the blower may
haveanytroubles.
(2) Beforeoperatingtheblowerwhichhadbeenstoredforlongperiodoftime,checkifthe bearing
andtheinsulationofthe motorhave noproblem.
(3) While the blower is stored, rotate the blower shaft several times by hand every month. If this
procedureisnotperformed,the lifeofthebearingmaybecome short.
(4) After stored for long period of time, carefully check if the blower has no abnormality before
operating.
6. Installation
The blower should be placed on a flat and rigid foundation with vibration isolator pads. If there are
gapsbetweenthepadandfoundation, fillthe gapswiththinsteelsheets(shimming).
Clearsomespacearound theblower for the maintenance.
When anchorboltsareused,donot fastennutstightlyso thatthepadswill beeffective.(Fig.1)
(Anchorboltisoption.)
Fig.1 Anchorbolt

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7. Piping
Use rubber sleevesor flexible joints to connect to piping to avoidunnecessary force to the blower and
to isolate thevibration from the blower. If direct connection to piping is inevitable, do not give the force
to the blowerby dimensionaltolerances,weightofpiping,thermalexpansion ofpiping,etc.
8. Connection to Powerand Test run
(1) Turn the fanby hand to verify freerotationwithout rubbing ornoise.
(2) Check the nameplates of blowerand motor and confirm if they agree with the specification for
power supply,then connect to powerlineunderinstruction byelectrical engineer as per electric
technical standards andwiring regulation.
(3) Jog the blower and confirm the rotational direction is the same as the mark. If the rotational
direction is opposite, change the wiring connection. The direction can be reversed by
exchanging 2 wires of 3 wires. If the blower runs continuously with reverse rotational direction,
itcannotperformasspecifiedandmaylead toseriousaccident.
(4) Runtheblowerand measure the electriccurrent (average of each of3phase)of themotor.If it
exceeds the rated current, use at below the rated current by adjusting the air volume with
damper and so on. After running for a while, if there is no abnormal vibration or noise, test run
can be concluded. If any abnormality were found during test run, corrective action should be
takenby referring to “11. Troubleshooting”.
9. Precautions for Operation
Beforeoperating the blower,understand the following thoroughly.
(1) Continuoususe atsmallairvolumewillleadto blowerdurabilityproblem.
(2) The blower is designed to handle clean air. It cannot handle for air containing particulates and
dust, corrosive gases nor inflammable gases. Temperatures of air which standard model can
handle areintherangeof-15 to 50deg.C.
Pay attentiontofollowingprecautionincaseofthatheatresistantmodeloperate.
(3) Donotwrapthecoolingfan coverina heatinsulationmaterial.
Otherwise the life of the motor bearing may be shortened because the heat insulator material
prevents heatloss.
(4) After starting the blower, temperature of the gas should be raised slowly. Otherwise the blower
maybestrained byheatexpansion.
(5) When stopping the blower, keep running it until the temperature of the blower becomes nearly
room temperature. If the blower stops suddenly, the motor may be broken because the heat is
transmitted to it.

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10. Maintenance
The followingmaintenanceisrecommendedto keepthebloweringoodcondition.
(1) Pay attentionto ventilation tokeeptheambienttemperature intherangeof-15 to40 deg. C.
(2) Pay attention to abnormal noise, abnormal vibration, abnormal temperature and air leakage. If
abnormalityis found,takeactionsreferringto “11.Troubleshooting”.
(3) Lubricate only that the motor has bearings requiring the lubrication. The life of the bearing is
about20,000 hours,but thelife willbedrastically shortened ifambienttemperatureistoo high.
(4) If the blower has air filter at the inlet, check the cleanlinessof the air filter periodically. Replace
or clean the filter if and when the air filter is not clean, as it causes pressure loss. The air filter
made by Muto can be washed by soaking into water or neutral detergents. (Wash it gently, do
not rub or do not squeeze it.) Lay the cleaner side up to dry. It can be cleaned for a few times
withthis method.

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11. Troubleshooting
The following tableisfortroubleshootingduringtestrunandoperation.
Trouble
Cause
What todo
Tripped fuseor
breakers
Abnormalvoltageorfrequency
Consultwithpowercompany.
Inappropriatecapacityofpower
sourceequipment
Replacewith appropriateone.
Missingphase
Checkwiring.
Imbalancedvoltageofphase
Consultwithpowercompany.
Excessivevoltagedrop
Checkthethicknessand lengthof
wiring.
Excessive current
Reduce airvolumebydamper.
Reversedrotation
Changewiring.(exchanging2wiresof
3wires)
Fan touch
Repair.
Waterinthecasing
Drainand takesomepreventive
measure.
Abnormalityofbearing
Repair.
Insufficientair
pressureor
volume
Improperfrequency
ConsultwithMuto.
Toohighambientairtemp.
Improve airventilationofthe room.
Leakageorcloggedpiping
Checkpiping.
Missingphase
Checkwiring.
Damagedfan,etc.
Repair.
Reversedrotation
Changewiring.(exchanging2wiresof
3wires)
Dirtyorcloggingairfilter
Cleanorreplace.
Loweredmotorspeed
ConsultwithMuto.
Foreign materialonthefan
Cleanup.
Abnormalnoise
and/orvibration
Touchingorbrokenfan
Repair.
Reversedrotation
Changewiring.(exchanging2wiresof
3wires)
Imbalanceoffan
Fan cleaning. Ifvibration stillremains,
repairit.
Bad bearing
Repair.
Foreign objectorwater
Cleanup and protect.
Imbalancedvoltagebetween phase
Consult withpowercompany.
Missingphase
Checkwiring.
Airleakage
Checkpipingand repair.
Weightofpiping orforceinducedby
thermalexpansion
Getridofany force to the blower.

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12. Instruction for Disassembly and Reassembly
Turn thepower offbefore disassembly andreassembly.
Following is instructive to disassemble and/or to reassemble the blower as referring “13. Structural
drawing”. (It is very difficult to explain all of details of the work perfectly in writing and by sketches.
Therefore it is recommended to understand and record that the parts put together or direction while
disassembled.)
12-1. Disassembly
(1) Removeend head ②.
(2) Remove fan stopperbolt ④andfanstoppercollar ③,and removefan ⑤frommotor ①.
(3) Remove packingplate ⑥,andremovepacking ⑦.
(4) Remove motor ①. At that time, if there are the liners (shims) under motor ①, their original
location shouldbe recorded forreassembly.
12-2. Cleaning
Cleanthe disassembledparts.
12-3. Reassembly
Reassemblyisbasicallythereversedorderofdisassembly.

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13. Structural drawing
No.
Description
Qty.
1
Motor
1
2
End head
1
3
Fan stoppercollar
1
4
Fan stopperbolt
1
5
Fan
1
6
Packingplate
1
7
Packing
1
8
casing
1
9
collar
1