how to handle the fan

1-1. Fan specifications

This section provides an overview of how to handle the fan.Some points may differ depending on the model. Please also refer to the catalog and the instruction manual of each model. Improper use may cause an accident.

1. Our company’ s fan does not have explosion-proof construction.

2. Be sure to specify the installation location when making inquiries the product. Depending on the installation location, it is necessary to change the specifications of the fan body.

3. Normally, the required motor output should have a margin of 10-20% considering the shaft power that varies depending on the fan operating conditions. Especially, be careful not to overload the motor in the following cases.

• When operating the fan by inhalation gas at a lower temperature than the design specification.

• When the temperature is low at the beginning of operation and the temperature rises gradually.

• When the gas handled consists of air and heavier gases than air.

4. Please indicate the following about the motor at the time of inquiry. The specifications may change depending on the conditions.

• Installation location

• Starting method

• Fans with large J (moment of inertia) value (special motors require special attention because of their weak torque)

• Operation control of motor

5. The anchor bolts, stopper bolts, and hanging frame type vibration absorber base are designed with a horizontal seismic coefficient of 1. 0G.

If you need more than 1.0G, the fan specifications, such as the anchor bolt size, have to be changed. Please tell us at the time of inquiry.

1-2. Installation

Refer to the instruction manual for details.

1. When you receive the fan, check the fan and accessories are exactly what you ordered.

Also check for any damaged parts during transportation, peeling off of paint, loose bolts, etc.

If there are any defects, contact the place of order.

2. Consider the weight and center of gravity when transporting the product.

When lifting the fan, use the lifting lug and do not lift any equipment that exceeds the rated load of the lifting device.

3. Do not to allow rust to be formed on the fan during the storage until installation.

4. The standard fan is for indoor use. Do not use indoor type fans outdoors. Ensure that the fan does not suck in rainwater.

5. After installation, provide enough space around the fan so that it can be inspected and repaired.

6. The foundation must be strong enough to withstand the fan’ s weight and the load and vibration produced by the running fan.

7. Make sure that the load of the duct is not applied to the fan body. Doing so may cause the fan to fail, break, or vibrate.

8. In particular, resistance caused by dampers on the suction side of the blower, and drift and swirling flows caused by piping have a significant impact on the performance of the blower. Excessive vibration or bearing damage due to surging operation or motor damage due to overcurrent may occur.

9. When using a spring vibration isolator, place the vibration isolation materials evenly around the center of gravity of the fan so that the fan is in a horizontal condition.

10. The fan is shipped after alignment at the factory, but it may have been misaligned during transportation. Readjust it after installation.

11. Be sure to install a ground wire to prevent an electric shock.

12. Be sure to install a ground fault interrupter and an overload protection device on the primary side of the fan.

When using a thermal relay is used as an overload protection device, the fan may trip at startup due to the starting characteristics of the fan.

* The starting current of Top Runner efficiency (equivalent to IE3) motor may be higher than the standard efficiency (IE1 equivalent) motor. Therefore, it is necessary to verify the applicability of its ground fault interrupter and overload protection device.

Perform electrical wiring and wiring work safely and securely according to Electric Installation Technical Standards and Internal Wiring Regulations.

13. Before starting the test operation, check that there are no tools or other debris inside the fan and that bolts, V-belt guards are securely attached.

14. The pressure fan is designed for installation in "high places" (height of 1.8m or more). If the pressure fan is to be used in a low place or a place where people of objects may com in contact with it, use it together with the optional guard net (indoor) or outdoor hood (outdoor).

15. Do not block the inlet or outlet of the air curtain. Otherwise, the motor may overheat and cause a fire.

How to handle the fan

Technical data

1-3. Precautions for inverter operation

Carrier frequency

Sound from motor (beep sound)

Noise generated by the inverter

Number of times surge voltage is applied

Low

Large

Small

Few

High

Small

Large

Many

-

-

-

-

1-4. Precautions for long-time shutdown

Table 1

1) If the fan is to be used with an inverter, please let us know before placing an order. Inverter control may not be possible with standard motors.

2) The default settings of the commercially available inverter are not suitable for our fans.Using the inverter with the default settings may cause abnormal vibration or damage to the fan. Be sure to make the settings of the inverter before operation by referring to the following.Changing the inverter setting may solve the abnormal condition.

3) When using with an inverter, check that there are no abnormalities under any of the frequencies to be used during test operation. If operated under conditions with abnormal vibrations, the fan may be damaged.To avoid abnormal vibration, jump the resonance frequency of the eigenvalue by setting the inverter.

[Inverter setting values (reference)](1) Basic frequency : Set to the specified frequency (frequency indicated on the nameplate)

(2) Maximum frequency : Set to the specified frequency (frequency indicated on the nameplate)

(3) Maximum output voltage : Set to the rated voltage of the motor

(4) Upper limit frequency : Set to the specified frequency (frequency indicated on the nameplate)

(5) Lower limit frequency : 25 - 30Hz. If operated at a frequency lower than this, the motor may not run, may generate heat and inverter output may become unstable.

(6) V/F characteristics : Set to reduced square torque

(7) Acceleration/Deceleration Time : Set to 30 - 40 seconds. Starting or stopping the fan in a shorter time, the inverter may trip.

(8) Carrier frequency : The carrier frequency is set differently by each manufacturer at the time of shipment. If abnormal vibration or noise occurs with the current setting, it may be resolved by changing the carrier frequency setting according to the table below.

The following precautions must be observed if the fan is not operated for a long period of time (one month or more). Refer to the instruction manual for details.

1) When the fan is not operated for a long period of time, apply appropriate anti-corrosive agent to the areas prone to rust so that rust does not occur. Refill or replace grease so that fresh grease is contained in the bearing.

2) Take measures to prevent dust or other debris from accumulating on the fan main unit or the motor.

3) Cover the inlet on the suction side and the outlet on the discharge side to prevent dust accumulation and debris from entering the connection duct. If the damper is installed, close the damper.

4) Take care to protect the motor and other electrical devices from moisture.

5) Remove the V-belt and store it away from hot, humid, and dusty places.

6) Cover the bearings with plastic or other material to prevent contact with the outside air and dust from entry.

7) Before running the fan after a long period of shutdown, inspect each part and replenish or replace grease to the bearing.

8) Once or twice a month, rotate the impeller shaft by hand and protect the bearing.

9) Install an enclosure or take other measures to prevent unauthorized personnel from approaching the fan during the long-time shutdown.

10) If cooling water is used for the bearing, drain the water to prevent cracks from freezing in winter.

Technical data

1-5. Daily inspection

The main shaft, impeller, V-belt pulley, and V-belt are rotating during operation. Be extra careful not to get your clothes or other parts caught in these parts.

Fig. 1. Allowable vibration range

1) Check for any abnormal vibration, noise, bearing temperature, electric current or other conditions.

If there is any unusual condition, it may be a sign of a failure. In such a case, you need to take measures as soon as possible.

For this purpose, it is recommended to keep an operation log.

2) The allowable bearing temperature is normally room temperature +40°C or less and 70°C or less.

3) If strong vibrations occur, stop the operation and inspect the V-belt alignment, duct connections, tightening of the mounting bolts and foundation bolts, and check for accumulation of dust on the impeller and damage to the bearings. If the vibration is within the area specified as "Acceptable" in JIS B 8330, you can run the fan, although the vibration level is preferable in the area specified as “Good” (see Fig.1). Note that, if your fan comes with a vibration isolation device, the vibration is not transmitted to the foundations, but vibration of the fan itself becomes somewhat stronger. In this case, it is normal if total amplitude is below the dashed line.

4) In addition to vibration, noise is also an important factor in judging the operation condition. If there is a metallic sound of rotating parts coming into contact with each other, stop operation immediately.Although the continuous rasping noise of air inside the casing is normal, the discontinuous rumbling noise is a sign of surging. Take measures such as changing the damper opening degree.

5) Bearings make some noise even in normal condition.Although it is rather difficult to identify an abnormal noise because bearings produce complicated noises, familiarize yourself with the patterns to prevent an accident. (See Table 2 and 3.)

V =　　　 = =Where ω: angular velocity (rad/s)60

2πn2 × 103

aω6 × 104

aπn

Reference:

The relation between the total amplitude “a” (µm) and the vibration velocity “V” (mm/s) is as follows:

Table 2 Normal sounds of bearings

Type of sound Normal sound

Constant hissing noise. This is the sound that a ball rolls on the raceway surface.

Clattering sound. When load is applied in the radial direction (which is the case for most fans), the balls are alternately loaded and unloaded. Noise is produced at the switching point of loaded/unloaded state. It occurs mostly with low speed rotation.

A retainer maintains the relative position of the balls. There is a small gap between the retainer and the outer ring, which allows the retainer to rotate; however, a continuous chunking noise is generated when the retainer is occasionally in contact with the outer ring. It is a slightly annoying noise, but cannot be eliminated easily. It occurs mostly with low speed rotation.

Warning

(On the bearing) holder

Roller falling noise

Retainer noise

Raceway sound

n Rotational speed (min-1)

To

tal a

mp

litu

de

(µm

)

Unacceptable

Acceptable

Good

Excellent

With vibration isolator

Technical data

Vibration tolerance depending on installation conditions

Table 3 Abnormal sounds of bearings

Type of sound Abnormal sound

Debris could get into a bearing through careless handling of grease or for other reasons. It sounds irregularly rattling or grinding sound. Wash the bearing thoroughly with oil and refill with new grease.

Any flaws on the ball will make an irregular, intermittent sound. Any flaws on the raceway surfaces of the inner and outer rings will make continuous noise. If the noise is faint or insignificant, the bearing may still be used after refilled with grease. If the noise becomes serious, replace the bearing.

This is the same phenomenon as flaw sound. Replace the bearing if the noise becomes serious.

It is an irregular squeaking sound and not periodic. This occurs when a slip occurs between the ball and the raceway, or between the ball and the retainer tube, or when lubrication does not work properly. Replace the grease with a good quality one.

Table 4 Allowable vibration tolerance during factory tests and Field trial runs (Japan Society of Industrial Machinery Manufacturers, Association of Fan Engineers)

Test site Installation conditions RemarksVibration Tolerance (mm/s)

4

6

10

6

4

6

10

6

Relatively compact air-conditioning fans equivalent to JIS B 8331

Other than the above



Table 5 Vibration monitoring standards during operation(Japan Society of Industrial Machinery Manufacturers, Association of Fan Engineers)

Monitoringstandard Installation conditions

Vibrations tolerance for gas handled (mm/s)

Air or clean gasCorrosive orabrasive gas

Adhesive gas

6

9

15

9

15

15

20

15

7.5

10

ー

10

15

15

ー

15

7.5

10

ー

10

15

15

ー

15





Contamination sound

Flaw sound

Factory test

On foundation surface plate

On temporary surface plate

On the vibration isolationtable

On concrete foundation

On steel frame structure

On the vibration isolationtable

Foundation on concrete foundation


On the vibration isolation table

Foundation on concrete foundation


On the vibration isolation table

Field trial run

Factory test

Field trial run

Rusting sound

Squeaking sound

Technical data

1-6. Regular inspection

Periodic inspections should be performed at least once a year. Refer to Table 7 for details. Besides the items for daily inspection, pay attention to the following points.

1) Replenishing or replacing grease or lubricating oil to bearings

2) Re-check the alignment and V-belt

Check the V-belt for any wear or damage, and check the tension. Replace or re-tension the V-belt as needed. Also check the wear of the shaft coupling rubber as well.

3) Replenishing or replacing grease to spring coupling, etc.

4) Check the degree of looseness between the impeller hub and shaft fitting part

5) Check the impeller, shaft, or other parts for any corrosion and wear.

6) Clean the inside of the fan and apply rust prevention or other repairs.

Since the V-belt tends to stretch at an early stage of use, ensure to readjust the tension several days after starting operation.

First ,calculate the deflection distance(δ) using δ = 0.016 ℓ. (ℓ is the span length between pulleys)

Next, use a tension meter to give deflection of δmm in the middle of the V-belt so that the deflection load at this time becomes the value shown in Table 6.

Refer to the instruction manual for details.

Table 8 and 9 show the guidelines for maintenance and inspection.

Fig. 2. Tension meter

Fig. 3

Before you inspect the fan, be sure to turn off the main power.Otherwise, the fan may suddenly start up through automatic run or from other causes, and it is very dangerous.

Warning

Technical data

Table 6 Deflection load Td reference value by belt type and motor output

Belt type x Qty

Motor outputkW

Td for each V-belt Unit: N

For new belt For re-tensioning Belt type

x QtyMotor output

kW

Td for each V-belt Unit: N

For new belt For re-tensioning

A× 1

0.2 ～ 0.4 9 ～ 11 8 ～ 90.75 12 ～ 14 10 ～ 121.5 17 ～ 19 15 ～ 162.2 21.5 ～ 23.5 18.5 ～ 20.53.7 25.5 ～ 27.5 22 ～ 24

A× 2

0.75 7 ～ 9 6 ～ 81.5 13.5 ～ 15.5 11.5 ～ 13.52.2 15.5 ～ 17.5 13.5 ～ 15.53.7 18.5 ～ 20.5 16 ～ 185.5 22.5 ～ 24.5 19.5 ～ 21.5

A× 3 3.7 14.5 ～ 16.5 12.5 ～ 14.5

B× 2

1.5 11 ～ 13 9 ～ 112.2 14.5 ～ 16.5 12.5 ～ 14.53.7 16.5 ～ 18.5 14.5 ～ 16.55.5 21.5 ～ 23.5 18.5 ～ 20.57.5 27.5 ～ 29.5 23.5 ～ 25.511 33.5 ～ 35.5 28.5 ～ 30.515 42 ～ 44 36.5 ～ 38.5

B× 3

5.5 19.5 ～ 21.5 17 ～ 197.5 23.5 ～ 25.5 20 ～ 2211 30.5 ～ 32.5 26 ～ 2815 35.5 ～ 37.5 30.5 ～ 32.518.5 39 ～ 41 34 ～ 36

B× 4

15 29.5 ～ 31.5 25.5 ～ 27.518.5 33.5 ～ 35.5 28.5 ～ 30.522 35.5 ～ 37.5 30.5 ～ 32.530 43 ～ 45 37 ～ 39

3V× 2

2.2 10 ～ 12 8 ～ 103.7 14.5 ～ 16.5 12.5 ～ 14.55.5 17.5 ～ 19.5 15 ～ 177.5 19.5 ～ 21.5 17 ～ 1911 23.5 ～ 25.5 20 ～ 2215 28.5 ～ 30.5 24.5 ～ 26.5

3V× 3

5.5 12.5 ～ 14.5 11 ～ 137.5 17.5 ～ 19.5 15 ～ 1711 19.5 ～ 21.5 17 ～ 1915 22.5 ～ 24.5 19.5 ～ 21.518.5 23.5 ～ 25.5 20 ～ 22

3V× 4

11 14.5 ～ 16.5 12.5 ～ 14.515 18.5 ～ 20.5 16 ～ 1818.5 22.5 ～ 24.5 19.5 ～ 21.522 22.5 ～ 24.5 19.5 ～ 21.5

5V× 2

11 31.5 ～ 33.5 27 ～ 2915 39 ～ 41 34 ～ 3618.5 44 ～ 46 38 ～ 4022 56 ～ 58 48 ～ 5030 67.5 ～ 69.5 58.5 ～ 60.5

5V× 3

15 29.5 ～ 31.5 25.5 ～ 27.518.5 33.5 ～ 35.5 28.5 ～ 30.522 40 ～ 42 34.5 ～ 36.530 55 ～ 57 47.5 ～ 49.537 61.5 ～ 63.5 53.5 ～ 55.545 72.5 ～ 74.5 62.5 ～ 64.555 76.5 ～ 78.5 66 ～ 68

5V× 4

30 45 ～ 47 39 ～ 4137 51 ～ 53 44 ～ 4645 59 ～ 61 51 ～ 5355 67.5 ～ 69.5 58.5 ～ 60.5

* Calculate the deflection load using the belt manufacturer's formula.

* At 0.2 - 0.4kW, red seal belt is not available and energy-saving read belt is used.

(Energy-saving read belt has the performance of electrical resistivity equivalent to read seal belt that meets RMA standard in US.)

Technical data

Table 7

Fan inspection reportetaD(including total heat exchanger)

Date of inspection: Name of inspector:

Customer Supervisor

Address: TEL ( )

Type: Specifications/Applications

Serial No. Installation system

After installation: years

<Measurement Items>

Air volume m3/min Static pressure mmAq Rotational speed rpm Temperature ˚C

Voltage (when stopped)

r-s

V

S-T

V

t-r

V

Voltage (during operation)

r-s

V

s-t

V

t-r

V

Current (open) u

A

v

A

w

A

Current (rated) u

A

v

A

w

A

Current (shut-off) u

A

v

A

w

A

Insulation resistance

MΩ MΩ MΩ

(Air volume and static pressure are measured only when failure is found and necessary)

<Details of inspection>

Inspection item OK NG Record



RotorElectric motor V-pulley

Belt tension Power supply

Vibration isolator

Belt alignment

CurrentFoundation

and Mounting

Bearing Insulation resistance

Accessories

Rotation direction

Control panel and

wiringGas

Vibration Protective device

Applications

Noise Relay or others Environment

Air volume Duct Construction

Static pressure

Damper

Corrosion-proof paint shall be applied to the main spindle when replacing the motor.

<Special Notes>

Customer’s approval signature

Receipt No.:

Technical data

Table 8

Description of symbols　○ : Periodic inspection (including cleaning and adjustment). Replace or repair parts depending on the results.　▲ : Periodic replacement of consumables　◆ : Diagnosis of equipment, replacement of periodic replacement parts.

Part name

Entire fan

Fan casing

Impeller

Bearing

Main shaft

V-belt

●

●

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ー

ー

Sound, vibration

Appearance

Sound, vibration

Check the operating status

Appearance

Appearance

Tightening condition of lock nut

Amount of grease

Operation status (sound)

Operation status (vibration)

Surface temperature

Rotational motion

Appearance

Tightening condition of screws

Check the tension

Belt fluctuation

V-pulley alignment

Appearance, wear, scratch

Listen, Touch

Visual check

Listen, Touch

Visual check

Visual check

Visual check

With a tool

Operation time check

Hearing

Vibrometer

Surface thermometer

Tactile sense

Visual check

With a tool

Tension Meter

Visual check

Visual check using straight

Visual check

No noise or vibration significantly larger than the initial condition

No significant adhesion of dust, deformation, scratches, corrosion, etc.

No abnormal noise or vibration

No contact or abnormal noise

No significant corrosion, deformation, or deposits

No shaft discoloration. No rust in the fitting area

Not loosended

Lubricated regularly according to the instruction manual.

No abnormal noise

Vibration speed :V=15mm/s or less

Not higher than [ambient temperature +40°C] or [70°C],

Smooth and uniform rotation by hand

No significant corrosion, wear, or deformation

Not loosened

Within the range of individually calculated deflection force,

No significant fluctuation

Parallelism and eccentricity of V-pulley shall be 1/3° or less.

No significant twisting, scratches or cracks

Fan category Periodic inspection

Inspection itemInspection

methodJudgement criteria (reference)

Entire fan

Fan casing

Impeller

Bearing

Main shaft

V-belt

If repair is difficult, replace the product. Retighten the foundation bolt and hanging bolts.

Cleaning of deposits Repair by touch-up paint where the paint is peeled.If there is significant deformation, scratch, corrosion, etc., replace it.

Check that there is no contact. Retighten the bolts for each part.

If damaged by contact, replace it.

Clean and repair painting (if significantly corroded or deformed, replace it).

Replace the bearing. Replace the shaft.

Retightening with a tool.

Lubrication of grease

Lubricate grease or replace the bearing (Investigate if extremely shorter than the maintenance cycle)

Replace the bearings (if the replacement cycle is extremely short, investigate the cause).

In case of abnormality, investigate the cause. Replace it in some cases.

Bearing replacement

Bearing replacement

Retightening with a tool.

Adjust tension (after 50 hours operation only for the first time).

Adjust tension and unify V-belt length (matched set) (replace all V-belts).

Centering adjustment

Replace all V-belts

15 years

15 years

15 years

10 years

3 years

1 year

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Guidelines for maintenance and inspection for air conditioning fan parts

Equ

ipm

ent

rene

wal

Note 1) Operating hours: The operating hours per year is supposed to be 3,000 hours (300 days/year: 10 hours/day).

Guidelines for Maintenance and Inspection of Air Conditioning Blower Parts by the Japan Society of Industrial Machinery Manufacturers

Part name

Preventive maintenance

RemarksContents of maintenance

Elapsed yearsReplacementcycle

(Reference)

Half-yearly

Yearly

Others

Inspectioncycle

(Reference)

Belt-driventype

Direct-driventype

Mixed flow

/A

xial-flow

Centrifugal

With silencer

box

Mixed flow

/A

xial-flow

Centrifugal

With silencer

box

Maintenance and inspection are essential for the safe and long-term use of air conditioning fans. Insufficient maintenance or inspection may impair the normal functions and cause unexpected accidents. This guideline shows the contents of periodic inspection and standard parts replacement cycle under general operating conditions. We Hope it will help you as a supplement to "user’s manual/instruction manual" provided by each manufacturer.

Periodic replacement parts

Inspection and lubrication intervals shall be in accordancewith the technical data of each manufacturer.

(corrosion, deposits, and deformation)

(corrosion, deposits, deformation, and fitting part.)

(corrosion, deposits, and abrasion)

(corrosion, deposits, deformation, and leakage.)

(rotate by hand)

ruler and thread

whichever is lower

tension load, or manufacturer's specified value.

Technical data

Table 8

Description of symbols　○ : Periodic inspection (including cleaning and adjustment). Replace or repair parts depending on the results.　▲ : Periodic replacement of consumables　◆ : Diagnosis of equipment, replacement of periodic replacement parts.

Part name

V-pulley

Belt guard

Vibration isolator

Electricmotor

Silencer

V-pulley

Belt guard

Vibration isolator

Electricmotor

Silencer

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Appearance, Scratches

Wear of the groove

Wear (fitting with main shaft)

Tightening condition of screws

Appearance

Insulation

Sound

Vibration

Temperature

Current

Odor

Rotational motion

Capacitor

Appearance

Appearance

Disengagement

Visual check

Visual check

Visual check

With a tool

Visual check

Smell

Touch

Visual check

Visual check

Visual check

Fan category Periodic inspection

Inspection itemInspection

methodJudgement criteria (reference)

Part name

V-pulley replacement

Adjust tension and unify V-belt length (matched set)

(replace all V-belts).

V-pulley replacement

Retightening with a tool. Adjust alignment.

Replace it if not repairable.

Replace it in case of failure.

Replace it in case of failure.

5 years

15 years

15 years

ー

ー

ー

15 years

10 years

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Preventive maintenance

RemarksContents of maintenance

Elapsed years

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Half-yearly

Yearly

Others

No significant scratches or cracks.

The new V-belt must not touch the groove bottom. No wear on certain grooves or wear on left and right sides.

No significant wear.

No positional movement or looseness of V pulley.

No significant rust or deformation.

The insulation resistance shall meet the motor specifications. No odor of varnish burning.

Hearing test Auscultation bar

No significant abnormal sound. No increase in noise level compared to the normal value.

Touch Vibrometer

No significant vibration. No increase in amplitude compared to normal conditions.

No discoloration of paint. No abnormal heat generation.

Do not exceed the value indicated on the motor nameplate.

No odor of burning

Smooth and uniform rotation by hand

Visual checSurface thermometerk

Visual check urface thermometer

No abnormal heat generation, no swelling, breakage, or perforation of the case

No significant deterioration, such as cracks. No displacement

No peeling of glass cloth. No significant adhesion on the surface.

The sound deadening material should not be removed.

Ren

ew t

he p

rodu

ct Periodic replacement parts(Bearing shall be as described above)(Replace the motor if the bearing cannot be replaced.)

Note 1) Operating hours: The operating hours per year is supposed to be 3,000 hours (300 days/year: 10 hours/day). Note 2) (● ) for vibration isolator applies only to the relevant models.

Guidelines for Maintenance and Inspection of Air Conditioning Blower Parts by the Japan Society of Industrial Machinery Manufacturers

Replacementcycle

(Reference)

Inspectioncycle

(Reference)

Belt-driventype

Direct-driventype

Silenceris also applicable.

Replace the motor in case of failure.


(Replace the bearing in case of bearing abnormality.)


Replace the motor or bearing.


Centrifugal

Mixed flow

/A

xial-flow

Centrifugal

Mixed flow

/A

xial-flow

Centrifugal

With silencing

box

500V Megger-OdorDetection

Currentmeasurement

Technical data

Table 9

Description of symbols　○ : Inspection cycle　● : Perform cleaning and adjustment depending on the inspection results.　◇ : Periodic replacement of consumables　◆ : Diagnosis of equipment, replacement of structural parts, disassembly and maintenance, or renewal of product

Remarks 1) If the equipment is subject to laws and regulations such as Act on Maintenance of Sanitation in Buildings, maintenance and inspection should be in accordance with the law. 2) The estimated operating hours are based on the assumption of 10 hours per day, 2,500 hours per year. This may vary depending on the operating conditions, so please check the maintenance contract. 3) The service life required to replace the product is 13 to 15 years. The functional parts are expected to be available for at least 6 years after the date of discontinuation. 4) This assumes a general office building. 5) Please contact a specialist for maintenance of electrical components. 6) The above maintenance period provides general guidelines and may require additional consideration depending on usage conditions, installation conditions, water quality, or others.

Heatexchangingelement


Check for clogging and damage


Check for dirt, clogging, and tearing

Check for gaps and tears

Check for wear and scratches

Checking operation noise

Checking operation noise and vibration

Appearance check

Rotary type

Stationary type

Filter (non-woven fabric)

Air seal (rotary)

V Belt (rotary type)

Geared motor (rotate type)

Bearing (rotary type)

Outer packaging

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Visual check

Visual check

Visual check

Visual check

Visual check

Hearing test 500V Megger

Listen, visual

Visual check

No clogging or damage


Significant dirt, clogging, and non-tearing

No gaps or tears

No significant wear, scratches or cracks

No abnormal noise. Must be 1MΩor more.

Abnormal noise and vibration

No paint peeling, rust, or corrosion

Part name Periodic inspection

Category Part name Inspection method

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10 years

1 year

3 years

5 years

15 years

Monthly

Rotary type

Stationary type

Filter (non-woven fabric)

Air seal (rotary)

V Belt (rotary type)

Geared motor (rotate type)

Bearing (rotary type)

Outer packaging

Clean or replace

Clean or replace

Clean or replace

Replace

Replace

Repair painting or Replace

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Part name Preventive maintenance

RemarksCategory Part name

Elapsed years

10 years

10000Hr

15000Hr

1 ２ 3 4 5 6 7 8 9 10 11 12 13 14 15

Recommendations for periodic maintenance and inspection, Total Exchanger Committer, The Japan Refrigeration and Air Conditioning Industry Association

Inspection item Judgment Criteria [Reference]

Guideline for maintenance and inspection of total heat exchangers

Tota

l hea

t ex

chan

ger

Tota

l hea

t ex

chan

ger

Products to be cleaned


Consumableparts

Consumableparts

Consumableparts

Consumableparts

Consumableparts

Consumableparts

Contents ofmaintenance Yearly Others

Replacement cycleInspection cycle

Period of use Years of use

Measurement of insulation resistance

Lubrication or replacement

Replace if the bearing noise is loud.Replace if insulation failure is detected.

Technical data

Remarks 1) If the equipment is subject to laws and regulations such as Act on Maintenance of Sanitation in Buildings, maintenance and inspection should be in accordance with the law. 2) The estimated operating hours are based on the assumption of 10 hours per day, 2,500 hours per year. This may vary depending on the operating conditions, so please check the maintenance contract. 3) The service life required to replace the product is 13 to 15 years. The functional parts are expected to be available for at least 6 years after the date of discontinuation. 4) This assumes a general office building. 5) Please contact a specialist for maintenance of electrical components. 6) The above maintenance period provides general guidelines and may require additional consideration depending on usage conditions, installation conditions, water quality, or others.

Humidifier

Humidifier

Description of symbols　○ : Inspection cycle　● : Perform cleaning and adjustment depending on the inspection results.　◇ : Periodic replacement of consumables　◆ : Diagnosis of equipment, replacement of structural parts, disassembly and maintenance, or renewal of product.

Table 9

Recommendations for periodic maintenance and inspection, Total Exchanger Committer, The Japan Refrigeration and Air Conditioning Industry Association



Check for dirt, clogging, and tearing

Checking operation noise

Measurement of insulation resistance

Check the operation. Check for dust.

Checking for debris

Check for loose terminals, wiring contact, and dust.

Checking of pin disconnection. Check for dust

Check for dirt and water leaks

Check for dirt

Check for water leakage

Check the operation.

Checking for debris

Check for water leakage, corrosion, deterioration, dust

Check the operation

Check for dirt, corrosion, deterioration and debris

Check the appearance and insulation materials.

Check controllability by appearance, display, and operation

Rotary type

Stationary type

Filter

Fan motor

Bypass damper

Substrate

Terminal area

Connector

Pressure reducing valve

Solenoid valve

Strainer

Drain pan

Float switch

Water supply tank

Exterior panels

Remote control switch

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Visual check

Visual check

Visual check

Visual check

Visual check

Retightening

Visual check

Visual check

Visual check

Visual check

Hearing test

Visual check

Visual check

Visual check

Visual check

Visual check

Visual check



Significant dirt, clogging, and non-tearing

No abnormal noise

Must be 1MΩ or more

No abnormalities should be found. No dust is allowed.

No significant adhesion of dust

Terminal should not be loose.

No missing pins and no dust

No significant dirt or water leakage

No significant contamination

No water leakage

Normal operation

No debris is allowed

No water leakage, corrosion, deterioration, dust clogging, peeling of paint

No abnormal operation

No dirt, corrosion, deterioration, dust

No significant rust or corrosion. N peeling of insulation material

No damage, display failure, or operation failure

Part name Periodic inspection

Category Part name Inspection item Inspection method Judgment Criteria [Reference]

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10 years

10 years

1 year

13 years

13 years

13 years

5 years

3 years

13 years

13 years

5 years

13 years

5 years

13 years

13 years

13 years

Monthly

Clean or replace

Clean or replace

Clean or replace

Cleaning

Clean or replace

Clean or replace

Replace

Replace

Clean or replace

Clean or replace

Replace

Clean or replace

Repair

Replace

Category Part nameContents ofmaintenance

Elapsed years

Yearly Others

20000Hr

10000Hr

25000Hr

1 ２ 3 4 5 6 7 8 9 10 11 12 13 14 15

Rotary type

Stationary type

Filter

Fan motor

Bypass damper

Substrate

Terminal area

Connector

Pressure reducing valve

Solenoid valve

Strainer

Drain pan

Float switch

Water supply tank

Exterior panels

Remote control switch

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Guidelines for maintenance and inspection of total heat exchange and ventilation units

Preventive maintenancePart name

Remarks




Consumableparts

Consumableparts

Consumableparts

Consumableparts

Consumableparts

Consumableparts

Consumableparts

Tota

l hea

t ex

chan

ge/v

entil

atio

n un

itTo

tal h

eat

exch

ange

/ven

tilat

ion

unit



Electricmotor(Motor)

Electricmotor(Motor)

Electricalcomponents

Electricalcomponents

Geared motor(rotate type)

Visual check

Hearing test500V Megger

clogging, peeling of paint film, crack, and water flow film, or cracks. Water can be drained.

No contact of wiring. No dust is allowed.

Moisture permeablemembrane typeDrip vaporizationtype

Moisture permeablemembrane type

If there is any loosened terminal, retighten and re-insert it.Clean if dust adheres.

Drip vaporizationtype

Replacement cycleInspection cycle

Hours of use Years of use

(including geared motor)

(including geared motor)

Geared motor(rotate type)

Replace if the bearing noise is loud. Replace if insulation failure is detected.

Replace and clean if there is any malfunction.

Replacementcleaning

Technical data

1-7. Grease (oil) replenishment and replacement

If the amount of grease is insufficient, lubrication failure will occur. Excessive grease may cause heat generation due to agitation. If the grease is used for a long period of time, it will partially deteriorate, resulting in poor lubrication performance.

Supply grease in an appropriate amount at appropriate intervals. Replenish the product from the grease nipple with the grease pump during operation.

Fans with pillow block can be used without lubrication. However, for longer use, it is recommended to replenish grease during periodic inspection.

When handling a gas of 151°C or more, the heat-resistant pillow block (HR5) is used and grease is SUPER LUBE No. 3 made by YUKEN KOGYO.

(1) During the first 6 months of operation, the oil gets dirty quickly, so change all the oil.

(2) Change the oil after 300 hours operation for the first time and every 2000 hours after the second time.

1) Roller bearing

2) Pillow block unit

3) Oil bath type bearing

Table 10 Grease supply amount for roller bearings

Fig. 6

35 20 70 50 40 20 80 50 45 20 90 60 50 30 100 80 55 30 120 100 60 30 140 190 65 30 150 220

Table 11 Grease supply amount for pillow block

Table 12 Grease supply period for pillow block

Table 13 Oil amount for oil bath type bearings

UCP204 1.2 UCP214 13.6 UCP314 31.5 UCP205 1.4 UCP216 18.8 UCP315 38 UCP206 2.2 UCP306 3.8 UCP316 41 UCP207 3.2 UCP307 5.7 UCP317 52 UCP208 3.9 UCP308 7.8 UCP318 62 UCP209 5 UCP309 9.4 UCP319 73 UCP210 5.4 UCP310 12.8 UCP320 92 UCP211 7.4 UCP311 16.4 UCP321 106 UCP212 10 UCP312 21 UCP322 133 UCP213 11.8 UCP313 26 UCP324 158

40 1.5 65 2.3

50 2.3 80 3.3

55 1.7

Clean

Dusty

Humid

50°C or less

70°C or lessGrease COSMO GREASE DYNAMAX SUPER No.2

Oil COSMO ALLPUS 32

Grease Shell Albania Grease No. 3

Fig. 5 Grease supply interval for roller bearings

Rotational speed (min-1)

Fig. 4

Gre

ase

supp

ly in

terv

al (h

)

Bearing box

Roller bearing

Felt seal

Bearing washer

Bearing nut

Bearing cap

Drain plug Main shaft

Shaft diametermm

Oil amountℓ

Shaft diametermm

Oil amountℓ

Grease nipple

Bearing Oil plug

Oil gauge

Drain port Oil

The main shaft, impeller, V-belt pulleys, and V-belt are rotating during operation. Be extra careful not to get tour clothes or other parts caught in these parts.

Warning

Shaft diameter

[A] : Deep groove ball bearing[B] : Cylindrical roller bearings[C] : Self-aligning roller bearings

Shaftdiameter A

Supplyamount (g)

Shaftdiameter

Supplyamount (g)

Cooling water port

Ambientenvironment

Bearingtemperature (°C)

Supply period

1to12 Month

1 to 4 months

1 week

BearingNo.

Supplyamount g

BearingNo.

Supplyamount g

BearingNo.

Supplyamount g

Technical data

1-8. Troubleshooting

Contact a specialist vendor or a service center designated by the manufacturer for replacement of parts or repair. Improper work may cause malfunction or accidents.

Even if the phenomenon of fan failure is the same, the cause and countermeasures may differ. In addition, there may be two or more causes.

If you cannot find the cause or countermeasure in Table 14, stop the operation immediately and contact the vendor or service center specified by the manufacturer.

Warning

Table 14 Troubleshooting

Phenomenon Cause Countermeasures

Bearing temperature

is high.

Large vibration

Abnormal noise

Performance

degradation

Motor overload

Excessive or insufficient grease Fitting failure of inner ring of bearing and shaft Fitting failure of outer ring of bearing and bearing case Deterioration of grease, entry of moisture Poor heat radiation from air-cooled parts Inadequate cooling water, temperature rise Excessive tension of V-belt Bad directed coupling

Adjust to proper amountReplace the shaft. Replace the motor Replace the bearing. Replace the motor. Replace grease. Replace the bearing.Check the air-cooled parts. Check the ambient temperature and heat radiation status, Check the cooling water piping. Check the water temperature.Adjust V-belt tension. Readjust the shaft coupling.

Foreign object sticking to the impeller, corrosion, and improper

Fitting failure of impeller boss and shaft Unbalance of V-pulley

Bending of the shaft

Bad directed coupling

Contact of rotating body and casing One-side contact of gland packing Resonance due to defective foundation Improper tightening of mounting bolts Bearing damage

Remove the foreign object from impeller and correct the balance.

Replace the impeller or motor shaft. Replace the V-pulley or correct the balance. Replace the shaft. Replace the motor.Readjust the shaft coupling. Reassemble the casing. Correct the gland packing. Reinforce the foundation. Retighten the bolts and nuts. Replace the bearing.

Suction of damaged debris from bearing

Contact between the rotor and the casingV Belt slippage, contact with belt guard Power supply voltage drop

Replacement of bearings

Inspection inside the casing

Correction of contact between rotor and casing and suction port

V Adjusting the belt tension, adjusting the guard position, and adjusting the power supply

Decrease in rotational speed, decrease in frequency, decrease in power supply voltage

Reverse rotationDebris sticking to impeller, corrosion, clogging of wear suction filter

Defective opening/closing of the damperExcessive actual resistance of dust accumulation in the casing and duct

Differences in Calculation of Gas Specific Weight

Power Supply Adjustment

Electric motor wiring changeCleaning, repair or replacement filter cleaning of impellerRepair and cleaning of the damperPlanning of booster fan, measurement of specific gravity of V-pulley replacement, gas analysis

Actual resistance too lowExcessive rotational speed (belt drive) Calculation of specific gravity of gas

Fall of power supply voltage

Adjust with damperV Replacement rotating speed reduction power supply adjustment of pulley

Technical data

Check forvibration

Piping

Motor

check forvibration in main

bodyYes

No

Yes

No

Fan

Cause of abnormal noise and vibration

Cause of performance degradation(insufficient air volume)

Cause of motor overload

Abnormalnoise

Checkthe rotation

direction

Bearing damage, improper alignment

Intrusion of foreign object

Unbalance, contact or wear of impeller

Irregularity or excessivetension of V-belt

Check theinstallationcondition.

Abnormal

Transmission of vibration from outside

Poor fitting of baseplate and main unit

Loosening, uneventightening of

foundation bolt

Normal Check for load Overload See "Cause of motor

Nature of sound

Fluid sound

Continuoussound

Surging andpulsation

Decreaseresistance

Intermittentsound

Check the airvolume

Excessive

Reduce the rotation speed

Tighten the damper

Appropriate

Effect of sound

Fan operation is normal

Other thanfluid sound

Sound other than fan is heard

Eccentricity of impeller boss

Contact of rotating part

Bearing damage or poor fitting

Sucking in debris

Slip of V-belt

Filter clogging

Vinration of piping

Other sounds are transmitted

Bearing damage

Different voltage

Reconnect wires.

Considerother modelsor soundproofmeasures(silencer).

Insufficientair volume

Rotating direction

Normal rotation Inspect the fan

Normal operation Measure the rotationspeed

Normal Pipe resistance is large

Pipe resistance is large

Damper in the middleof piping is half open

Suction pot is blocked

Sucking in debris

Abnormal

Slip of V-belt

V-pulley combinationis wrong

Fan for 60Hz is usedat 50Hz

Abnomal operation

Sucking in debris

Adhesion of dust

Wear of impeller

Reverse rotation Reconnect wires

Motor overload Rotating direction

Normal rotation Inspect the fan

Normal operation Gas handled As per design Check theair volume

Normal Abnormality of ammeter

Yes Repair the ammeter

No

Contact of rotating part

Motor failure

Sucking in debris

Bearing damage

Exccesive tension of V-belt

Voltage drop

Excessive PIpe resistanceis low

Tighten the damper

Reduce the rotation speed

Greater specificgravity

Motor overloadV-pulley combination is wrong

Fan for 60Hz is used at 50Hz

Reverse rotation Reconnect wires

Normalrotation

Check the noise source

Reverserotation

Technical data

how to handle the fan

Documents