FT KT Series User manual

Instruction Manual
Centrifugal Fan
Turbofan Type KT/KTS/KP
Note
Thank you for selecting a Atai Fan.
To ensure safety and maximum service life of the fan, please read this instruction manual thoroughly
prior to operation, inspection and maintenance. Keep this manual carefully at hand so that it can be
consulted anytime when operating, inspecting or maintaining the fan.
For contractors who carry out equipment work:
Please be sure to deliver this manual to user(s) who will carry out operation, inspection and
maintenance of the fan.
Atai Fuji Motor Co., Ltd.

I
Limited warranties
1. In the event of failure or breakage under proper use of the product during the warranty period,
equipment supplied by Atai Fuji Motor. will be repaired or replaced free of charge within the scope of
the relevant part, provided that such failure or breakage is attributable to inadequacy of the design
or workmanship of the equipment.
2. The warranty mentioned in the above clause shall be only the mechanical warranty of the defective
part, and shall not cover any expenses or other damage arising from the failure or breakage.
3. In the event of the following failures and breakage, the costs of the repairs shall be for the account
of the user.
(1) Failures and breakage attributable to equipment that was not delivered by Atai Fuji Motor.
(2) Failures and breakage after the expiration of the warranty period
(3) Failures and breakage caused by disasters or force majeure, such as fire, acts of God or
earthquakes
(4) Failures and breakage resulting from repairs or modifications made without the consent of Atai
Fuji Motor.
(5) Failures and breakage when parts other than those designated by Atai Fuji Motor. are used
4. Atai Fuji Motor. shall not be liable for the damage caused by incorrect or reckless use of the fan.
Cost and expenses incurred for sending engineer(s) in such a case shall be borne by the user.
5. If the cause of the failure is unclear, necessary actions shall be determined through mutual
consultation.

II
Purpose of this manual
The purpose of this manual is to provide the user with detailed information necessary to properly
operate, maintain and inspect the fan.
This manual contains the following information and is intended for persons experienced in the
operation of fans, or for those who have been trained by such experienced persons. Only qualified
personnel such as electrical engineers are allowed to carry out the electrical wiring work.
Contents
Limited warranties ..................................................................................................................................... I
Purpose of this manual............................................................................................................................. II
Contents ................................................................................................................................................... II
1. Safety precautions 1
1.1 Types and meanings of warning terms......................................................................................... 1
1.2 Safety precautions........................................................................................................................ 1
1.2.1 Precautions for placement and installation ............................................................................ 1
1.2.2 Precautions for operation.......................................................................................................2
1.2.3 Precautions for maintenance and inspection ......................................................................... 2
1.3 Location of the warning labels...................................................................................................... 2
2. Configuration and overview of the fan 4
2.1 Structure and part names of the fan.............................................................................................4
2.2 Specifications and accessories of the blower............................................................................... 5
3. Placement and installation 6
3.1 Before using the fan ..................................................................................................................... 6
3.2 Precautions during transportation and storage............................................................................. 7
3.2.1 Precautions for transportation................................................................................................ 7
3.2.2 Precautions for storage.......................................................................................................... 7
3.3 Precautions for the location of installation....................................................................................7
3.4 Foundation ................................................................................................................................... 8
3.5 Installation .................................................................................................................................... 8
3.6 Precautions for connecting the ducts ........................................................................................... 9
3.7 Precautions for wiring work ........................................................................................................ 11
4. Preparation for operation 12
4.1 Points to be checked before test running ................................................................................... 12
4.1.1 Checking the electrical system ............................................................................................ 12
4.1.2 Checking the fan system ..................................................................................................... 12
4.2 Trial run ...................................................................................................................................... 13
4.2.1 Precautions at the time of starting the fan ........................................................................... 13
4.2.2 Precautions during the operation ......................................................................................... 13
4.2.3 Precautions when stopping the operation............................................................................ 14
5. Stopping the fan 14
5.1 Precautions when stopping the use............................................................................................ 14
6. Maintenance and inspection 15
6.1 Daily inspection .......................................................................................................................... 15
6.2 Periodic inspection ..................................................................................................................... 15
7. Troubleshooting 16
7.1 Troubleshooting.......................................................................................................................... 16
8. Special accessories 17
8.1 Dampers..................................................................................................................................... 17
8.2 Expansion joints ......................................................................................................................... 17
8.3 Filter ........................................................................................................................................... 17

1
1. Safety precautions
1.1 Types and meanings of warning terms
This instruction manual divides precautions into the following four categories according to the
level of hazards (or the severity of the accident).
Be sure to understand the meanings of the following terms and comply with the content
(instructions) of the instruction manual.
Safety sign Meaning
Danger
Indicates an imminently hazardous situation. Failure to observe the
procedures or instructions will result in death or serious injury.
Warning
Indicates a potentially hazardous situation. Failure to observe the
procedures or instructions may result in death or serious injury.
Caution
Indicates a potentially hazardous situation. Failure to observe the
procedures or instructions will result in minor or moderate injury or cause
damage to equipment or devices.
Note Indicates information that is in particular to be noted or emphasized.
1.2 Safety precautions
1.2.1 Precautions for placement and installation
(1) Move and place the fan considering the center of gravity and its mass.
(2) Install it according to the instruction manual.
(3) Do not install it anywhere exposed to high temperature or direct flame.
(4) Do not install it anywhere with high humidity.
(5) For the type of standard specifications, do not install the fan in machine or chemical
factories etc which may contain acids, alkalis, organic solvents, toxic gases such as paint
fumes, or corrosive gases.
(6) Install the outdoor air intake in a position far away from the exhaust vents of combustion
gas, etc.
(7) Be sure to install a ground fault interrupter to the main power.
(8) Only qualified personnel such as electrical engineers are allowed to carry out the electrical
wiring work. Before working, be sure to turn off the main power.
(9) Do not bend, pull or trap the motor connection cables or forcibly push them into the casing.
Doing so may result in electric shock.
(10) Do not expose the motor to water (for indoor types).
If it gets wet, the resulting short circuit and/or insulation degradation of the electric circuit
may damage the fan.
(11) Do not place any obstacles that may hinder ventilation or any combustibles around the
motor.
(12) For the type which provided with drain outlet, arrange its piping properly.
(13) Install a protective wire mesh etc. to the open air intake.

2
1.2.2 Precautions for operation
(1) Before starting the fan, ensure that all the relevant workers are informed of the operation
and that there are no workers in the dangerous zone.
(2) Only those who are authorized by the site manager are allowed to operate the fan.
(3) Be sure to attach the terminal box cover of the motor before turning on the power.
(4) When the fan is running, never touch any parts of the unit unless it is absolutely necessary.
(5) Do not put your fingers or other objects into the air intake or exhaust vents.
(6) Do not put your fingers or other objects into the opening of the motor. Failure to observe
this may cause an electric shock, injury, or fire.
(7) Do not place any objects around the air intake or exhaust vents of the fan.
(8) Remove any tools and other objects from the top of the fan before operation.
(9) Be sure to attach a belt guard or a shaft coupling to the fan during operation.
(10) If the gas is hot, do not touch the fan body as it can also be hot.
1.2.3 Precautions for maintenance and inspection
(1) Maintenance and inspection must be carried out only by personnel who have been trained
to handle the fan.
(2) Before starting maintenance or inspection, ensure to inform the relevant personnel of the
operation.
(3) Before starting the maintenance or inspection work, ensure to stop the fan and turn off the
main power on the operation panel.
If you carry out the maintenance or inspection work with the power on, you may suffer an
electric shock and/or get injured by unexpected activation of the fan during the work.
(4) In case dust or oil components adhere to the fan, clean the fun regularly.
Failure to observe this may cause malfunctions, damage, or accident.
(5) Consult Atai Fuji Motor. or a service company before moving, repairing, or modifying the fan.
1.3 Location of the warning labels
The figure below shows the locations to which each warning label should be affixed. If these
labels become dirty and hard to read or if they are peeled off, replace with a new one.
Warning
Follow all warnings on the labels affixed to the fan and those in the
instruction manual.

3
KT-010S/010T/020S/020T/040S/040T/100T (same positions also for heat resisting types)
KT-*075/*150/*220/*370 (The asterisks “*” are replaced by “5,” “6,” or “B.”)
ラベル２
ラベル１
銘板
Nameplate
Label 1
Label 2
Warning
Caution
Label 2
Label 1
Danger of injury
Do not put your
finger, a bar, etc.
in the machinery.
Hot surface
Hands off
Label 1
Label 2 Nameplate
(For hot gas types)
Fig-1

4
2. Configuration and overview of the fan
2.1 Structure and part names of the fan
KT-010S/010T/020S/020T/040S/040T/100T
KT-*075/*150/*220/*370
*1: It is not included in model KTS.
No. Part name
cFan casing
dImpeller
eSuction flange *1
fDischarge flange *1
gMotor

5
2.2 Specifications and accessories of the blower
If you purchased a standard product, refer to the standard specifications in the following table.
For a custom-made product with special specifications, refer to the specifications including the
external dimensions drawing.
Caution
Do not use this product under any conditions other than those
provided in the specifications. Failure to observe this may cause an
electric shock, fire, and/or product failure.
(1) Standard specifications and special specifications
KT-010S/010T/020S/020T/040S/040T/100T
Clean air
Air 0°C to 60°C
Installation location Indoor (ambient temperature: 0°C to 40°C)
Installation method Floor mount (only in the orientation where the shaft is
placed horizontally)
Type Totally enclosed type (0.1/0.2kW),
Totally enclosed fan-cooled type (0.4/1.0kW)
50Hz, single phase 100V, 3 phases 200V (1.0kW output is
only achieved at 3 phases 200V.)
Motor
Phase, voltage 60Hz, single phase 100V, 3 phases 200V (1.0kW output is
only achieved in 3 phases 200V.)
Inside······· Modified alkyd resin coating (silver color)
Standard specifications
Coating Outside ···· Polyurethane resin coating (silver color)
Outdoor type
Hot gas type (Gas at over 60°C and up to 250°C)
Structure
modifications Special orientation of discharge flange
Special
specifications
Motor modifications Different voltage
KT-*075/*150/*220/*370
Clean air
Air 0°C to 150°C (Except for motors of enhanced safety or
explosion-proof type)
Installation location Indoor (ambient temperature: 0°C to 40°C)
Installation method Floor mount (only in the orientation where the shaft is
placed horizontally)
Type Totally enclosed fan-cooled
50Hz, 3 phases, 200V
Motor
Phase, voltage 60Hz, 3 phases, 200/220V
Inside······· Heat resisting coating (silver color) *2
Standard specifications
Coating Outside ···· Heat resisting coating (silver color) *2

6
Outdoor type
Hot gas type (Gas at over 150°C and up to 250°C)
Structure
modifications Special orientation of discharge flange
Different voltage
Special
specifications
Motor modifications Enhanced-safety, pressure-resisting or explosion-proof
type, corrosion resisting type and high efficiency type
*2：As model KTS is made of stainless steel, only acid pickling is available without
coating.
(2) Standard and special accessories
Standard accessories Special accessories
Companion flange Vibration insulating base
Shaft seal Vibration insulating liner
Suction wire mesh Foundation bolt
Suction damper Expansion joint
Discharge wire mesh *3 Filter
- Silencer
- Cable gland for outdoor use *4
*3: Provided only with models KT-010S/010T/020S/020T.
*4: If the models KT-010S/010T/020S/020T/040S/040T/100T are used outdoors,
connect a cable gland for outdoor use to the terminal box of the motor, and
carry out wiring with a cable for outdoor use.
Also use a cable with suitable outer diameter to the cable gland.
(It also applies to heat-resistant products.)
3. Placement and installation
3.1 Before using the fan
When you receive the fan, check the following points first.
If there are any problems, contact the sales agent you purchased the product from.
Handle the motor according to the instruction manual of the motor.
Incorrect handling may result in an accident or failure.
(1) Check the nameplate to verify that the unit is the one you ordered.
In particular, check the information on the rated current (50Hz or 60Hz).
(2) Check if the orientation of discharge flange and direction of rotation are as ordered.
(3) All the accessories that you ordered have been delivered.
(4) No part of the product is damaged during transportation.
(5) All fastening parts including bolts and nuts are securely tightened.

7
3.2 Precautions during transportation and storage
3.2.1 Precautions for transportation
· Do not get under the lifted fan. The fan may fall onto you.
· Ask a specialist company to move and place the fan in
consideration of the center of gravity and its mass.
· Before hoisting the unit, refer to the catalogue or external
dimensions drawing etc. to confirm that the mass of the fan does
not exceed the load limit of the hoisting equipment.
· Do not hoist the entire fan using the hook on the motor or any
other parts not intended for the purpose.
(1) When hoisting the fan, wind rope or wire rope on the motor base or the fan casing.
(2) Use as long ropes and wires as possible so that the fan can be lifted at an angle of 90° or
less, which prevents the fan from being deformed/damaged by the lifting load.
3.2.2 Precautions for storage
(1) Protect the unit so that rust does not form during storage before installation, assembly or
starting operation. In particular, take measures to protect the bearings from rain water and
dust, for example by covering them with a vinyl sheet.
(2) Store indoor-type motors and other electrical devices indoors.
Also for equipment for outdoor use, protect its wiring and cable openings against moisture.
3.3 Precautions for the location of installation
Install the fan in a place where the following conditions are satisfied:
(1) The fan of standard type is intended for the indoor use. To install it outdoors, choose a place
not exposed to wind or rain water. Furthermore, install the fan in a location where it will not
suck in rain water.
(2) Well-ventilated place with minimum exposure to dust or moisture
If you install the unit in a fully enclosed room, such as a machine room, install a ventilator so
that the room temperature does not increase due to the heat generated by the motor.
(3) Place with an ambient temperature of 0°C to 40°C
(4) Place that is not accessible by unauthorized persons or that is impossible for them to
operate the fan at.
Take measures to prevent unauthorized persons from having access to the fan, for example
by installing a barrier.
(5) Place where the fan can be easily and safely inspected and repaired.
Ensure that there is enough space for assembly, disassembly and repairs of the impeller
and other parts. If fan is installed indoors, make sure there is a doorway large enough to
carry the fan in and out of the room.
(6) In case of installing the fan indoors, provide the margin at the entrance so that the fan can
be moved or transferred.
(7) If it is necessary to frequently replace or repair fans or impellers due to corrosion or wear,
consider using minimal hoisting equipment.
Caution
Do not place any objects that may obstruct ventilation or any
combustibles around the motor.
They may prevent heat from escaping, thus resulting in overheating
or fire.
Note
Note