Teral VFC 408 User manual

Instruction Manual
RING BLOW
VFC 8TH Series
CAUTION
• Read the instruction manual carefully before you install, put into operation and maintain the Ring Blow and
handle it properly.
• For the sake of safety, never modify the Ring Blow.
We take no responsibility for the troubles caused by repairing or modifying the product.
• Hand over this instruction manual surely to the end users, who actually install, operate and maintain the
Ring Blow.
• After having read the instruction manual, keep it at the place, where can be accessed by the persons, who
use it.
• The specification of the product may be changed without prior notification.

Introduction --------------------------------------------------------------------
Thank you for your purchasing of the Ring Blow.
It is required for the Ring Blow for give full play to its performance, for preventing troubles from
occurring and for continuing its satisfactory operation for a long period not only to maintain and inspect
it after putting it into service but also to handle it properly in every stage after its delivery until its actual
operation.
This instruction manual illustrates the essential items for handling the Ring Blow.
If you find any question, please inquire of our special agent, dealer or business office about it.
Cautions for safety -----------------------------------------------------------
• Read this instruction manual and the other attached documents carefully before you use (install,
transport, maintain, inspect etc.) the Ring Blow and then use it properly. Acquire first the machine
knowledge, safety information and all caution items and use the machine.
Keep this instruction manual at the place, where can be accessed by the persons, who use it.
• The ranks for safety items are classified into alarms and cautions and described in this instruction
manual.
Alarm ：those items, for which the possibility of human DEATH and
HEAVY INJURY
are feared, if they are mishandles.
Caution
Caution
：those items, for which hazardous condition may occur and
MEDIUM HAZARD and SLIGHT INJURY are feared and/or
material damage are feared, if they are mishandles.
Even those items marked with may lead to serious results depending upon the
situation.
As every item describes serious contents, be sure to keep it always.
Furthermore, the following symbols are applied according to necessity in this instruction manual, so
that the essential points of indication can be grasped at a glance.
Symbol Meaning Symbol Meaning
Notification of a general
prohibition
Do not touch!
Always connect a
protective earthing
terminal!
Take care of ignition!
Take care of a high
temperature!
Take care of an electrical
shock!
1

Alarm
• The works of transport, installation, piping, wiring, operation, control, maintenance
and inspection may only be executed by the experts, who are well skilled of
handling the Ring Blows. Otherwise, an ELECTRIC SHOCK, an INJURY or a FIRE
is feared.
General • Hot line works are forbidden. Work always with the power supply switched off.
Otherwise, an ELECTRIC SHOCK or a FIRE is feared.
• Do not use the Ring Blow in an explosive atmosphere.
Otherwise, an INJURY or a FIRE is feared.
• Ground the protective earthing terminal surely. Otherwise, an ELECTRIC SHOCK
or a FIRE is feared.
Installation,
• In the Ring Blow is used as mounted on a ceiling or a wall, its fall is feared
depending on its mounting condition. Observe the catalog or instruction manual for
the details of usable range. An INJURY due to a FIRE is feared.
Adjustment
• Connect it to the power supply cable according to the wiring diagram within
terminal box and the instruction manual. An ELECTRIC SHOCK or a FIRE due to
incorrect connection is feared.
• Use it always at the voltage and frequency indicated in the nameplate on its main
body. A BURNOUT or a FIRE is feared.
Piping,
Wiring
• Do not bend, stretch or pinch the power supply cable and the lead wire for the Ring
Blow by force. An ELECTRIC SHOCK or a FIRE is feared.
Restore the cover for terminal box to the original position after completion of every
work. Otherwise, an ELECTRIC SHOCK is feared.
• Never access or touch any rotating body (cooling fan etc.) during running. A
CATCH-IN on an INJURY is feared.
• Switch off the power supply always in case of power failure. An INJURY is feared
due to sudden work of the machine at restoration of power supply.
Operation
• Switch off the power supply always when the Ring Blow is stopped because the
protection unit belonging to it worked. An INJURY is feared due to sudden work of
Ring Blow at recovery of the protection unit.
Caution
• Do not use the Ring Blow out of the specifications described in the nameplate,
catalog and instruction manual. An ELECTRIC SHOCK, an INJURY or a DAMAGE
is feared.
• Do not use the damaged Ring Blow. An ELECTRIC SHOCK, an INJURY or a FIRE
is feared.
General • Do not insert any foreign material or finger into the opening (opening in fan cover,
admission and discharge ports) of Ring Blow. An ELECTRIC SHOCK an INJURY
or DAMAGE is feared.
• We take no responsibility for modification by the customer, as they are out of the
scope of our responsibility.
2

Caution
• Take full care of fall and tumbling down during transportation. An INJURY is feared.
• Lift up the Ring Blow equipped with a hanger bolt always after getting rid of
loosening of the hanger bolt. But after mounting the Ring Blow on a machine, do
not lift up the entire machine using the mounted hanger bolt.
Verify the mass of motor based in the nameplate, package box, outline drawing,
catalog or the like before lifting it and do not lift any more mass than the rated load
of lifting tool. The gravity center of the Ring Blow is located at motor side, therefore,
the Ring Blow inclines to one side during lift-up.
Exert tension gradually on the wire and do not lift up suddenly.
This lift-up work may only be executed by the qualified workers. Do not stay under
the Ring Blow during the lifting work.
An INJURY or FIRE caused by FALL or TUMBLING DOWN is feared for all of
these cases.
Transportation
• Ambient temperature should be kept –20℃～+60℃during transportation.
• Open the package after verifying the top and bottom of product. An INJURY is
feared.
Opening the
Package
• Open the wooden frame package taking care of the used nails. Wear glove when
opening the wooden package. An INJURY is feared.
• Verify if the product is just the ordered one. An INJURY, DAMAGE or a FIRE due
to use of the incorrect product is feared.
• Never place any inflammable material around the Ring Blow. A FIRE is feared.
• Do not place any obstacle against ventilation around the Ring Blow. A BURN or a
FIRE caused by abnormal heating due to disturbed cooling is feared.
• Fasten the foundation bolts surely.
Insufficient fastening may cause an INJURY and DAMAGE due to shift of the Ring
Blow.
Installation,
Adjustment
• Never get on or hang on the Ring Blow. An INJURY is feared.
• Ring Blow shell be always mounted on suitable place in order to see its nameplate
easily and do not put any obstacle in front of it.
Do not dismount the nameplate.
• Construct the piping and wiring according to the technical standard for electrical
equipment and the internal wiring provisions. A BURNOUT or a FIRE is feared.
• For wiring to the terminal base in terminal box, fasten the terminal screws with a
torque of 1.0 to 1.3 N・m. Otherwise, DAMAGE of the terminal box is feared.
• For measuring the insulation resistance, do not touch the terminal. An ELECTRIC
SHOCK is feared.
Piping,
Wiring
• No protection unit belongs to the Ring Blow except for some models. The installing
of overcurrent protection unit is obliged based upon the technical standard for
electrical equipment. For preventing a FIRE and DAMAGE due to a motor burnout,
we recommend to install the protection unit other then overcurrent protection units
(including a ground fault interrupter) based upon consulting with us.
• If any abnormality occurs, stop the operation immediately and switch off the power
supply. An ELECTRIC SHOCK an INJURY or a FIRE is feared.
• The Ring Blow becomes considerably hot during its operation. Take care not to
touch it by your hand or body. A BURN is feared.
Operation
• Do not insert your finger or any others material into the opening of Ring Blow. An
ELECTRIC SHOCK an INJURY or FIRE is feared.
• Wear stopples during operation to shut the big noise.
3

Caution
• Do not touch the terminal for measuring the insulation resistance. An ELECTRIC
SHOCK is feared.
• The Ring Blow becomes considerably hot during its operation. Take care not to
touch by your finger and body. A BURN is feared.
Maintenance
, Inspection
• Take care, if you use a solvent or the like for cleaning the Ring Blow. A
POISONING is feared. Further, the use of thinner or benzene may cause
discoloring or exfoliation of coating on the Ring Blow.
Disassembly, • The repair, disassembling and modification shall be executed only by experts. An
INJURY due to the edge of Impeller or key groove, an ELECTRIC SHOCK or a
FIRE is feared.
Repair,
Modification
Disposal • Handle the Ring Blow as a general industrial waste, when it is be disposed.
Package Opening and Product Verification ---------------------------
When the Ring Blow has been delivered, verify the following points.
Caution
1. Verify the top and the bottom of product and open the package.
Otherwise, an INJURY is feared.
2. Open the wooden frame package taking care of the used nails. Wear glove when
opening the wooden package. An INJURY is feared.
3. Verify if the delivered product is just the ordered one.
（Check the output voltage, frequency, model etc. with the description on face plate.）
An INJURY, DAMAGE or a FIRE is feared, if an incorrect product is used.
4. Verify if any part is damaged and if any bolt or nut is loosened during the transport.
4

Transport-------------------------------------------------------------------------
Take care of the following points for transporting the Ring Blow.
Caution
1. Take full care of fall and tumbling down during transportation. An INJURY is feared.
2. Lift up the Ring Blow equipped with a hanger bolt always after getting rid of
loosening of the hanger bolt. But after mounting the Ring Blow on a machine, do not
lift up the entire machine using the mounted hanger bolt.
Verify the mass of motor based in the nameplate, package box, outline drawing,
catalog or the like before lifting it and do not lift any more mass than the rated load of
lifting tool. The gravity center of the Ring Blow is located at motor side, therefore, the
Ring Blow inclines to one side during lift-up.
Exert tension gradually on the wire and do not lift up suddenly.
This lift-up work may only be executed by the qualified workers. Do not stay under
the Ring Blow during the lifting work.
An INJURY or FIRE caused by FALL or TUMBLING DOWN is feared for all of these
cases.
3. Ambient temperature should be kept –20℃～+60℃during transportation.
Lifting method of the Ring Blow
Hanger bolt (in the case of the upper casing)
Safekeeping---------------------------------------------------------------------
Take care of following points for safekeeping the Ring Blow or suspending its operation for a long
period.
1. For safekeeping in the packed.
Keep the Ring Blow in an indoor dry place (Ambient temperature: -20℃~+50℃). Do not keep it on
such a place, as is exposed to water or dust, or with vibration, or place it on a bare ground
directly.
2. For keeping it in the installed condition.
(a) Cover the entire Ring Blow with a sheet for protecting it from invasion of moisture foreign
materials.
(b) Keep the Ring Blow with its hanger bolt mounted. If it is kept with the hanger bolt dismounted,
water may sometimes invade into through the screw hole.
(c) Run the Ring Blow for some minutes keeping it and every 3 months, for protecting the bearings
from rusting.
(d) If the operation of Ring Blow is suspended for a long period, measure the insulation resistance
of its winding every 6 months and verify that it is kept at higher than 1 MΩ. If the resistance is
not higher then 1 MΩat normal temperature, such measures are required as to dry the winding.
(e) Keep the Ring Blow in an indoor dry place (Ambient temperature: -20℃~+50℃).
Gravity Center
Hanger bolt (in the case of the upper motor)
(ＶＦＣ４０８～ＶＦＣ ７０８)(VFC ８０８、VFC ９０８)
Gravity Center
5

End cover
Gutter
Terminal box
Motor
Name of parts-------------------------------------------------------------------
Fan cover
Casing cover
Impeller
S
il
e
n
cer
Cooling fan
Suction port
Delivery port
Casing
Oil seal
（Cross section of VFC508A）
Installation and Piping --------------------------------------------------------
1 Take care of the following points for installing and adjusting the Ring Blow.
Alarm
1. Ground the protective earthing terminal surely.
An ELECTRIC SHOCK or a FIRE is feared.
2. In case of using the Ring Blow mounted on a ceiling or wall, its fall is feared depending
upon the condition. Follow the catalog or instruction manual for details of usable
range.
INJURY caused by its FALL is feared.
Caution
3. Never place any inflammable object around the Ring Blow.
A FIRE is feared.
4. Do not place any obstacle, which disturbs the ventilation, around the Ring Blow.
A BURN or a FIRE caused by abnormal heating are feared, due to the disturbed
ventilation.
5. Fasten the foundation bolts surely before starting the operation. An INJURY or
DAMAGE due to shift of the Ring Blow is feared, if the fastening is insufficient.
6. Never step on or hang from the Ring Blow
An INJURY is feared.
7. Make the nameplate for the Ring Blow always easily legible and do not place any
obstacle In front or it. Do not dismount the face plate.
6

2 Take care of the following ranges for the installation site and the gas to be transported.
Caution
1. Outdoor/indoor：Install at an indoor site, which is exposed to no wind and rain
Otherwise, an ELECTRIC SHOCK or a FAULT is feared.
2. Ambient temp./
transport gas：
Use it in the range from -10 to 40℃. Otherwise, shortening of life
and a
FAULT is feared. (No freezing is allowed.)
3. Relative humidity /
altitude：
Use relative humidity in 80% or less and 1000m above sea level
or less. Shortening of life or FAULT
is feared.
4. Atmosphere /
gas to be
transported：
If can neither be used in a place, where any such corrosive liquid
or gas as an acid or an alkali or any inflammable or explosive
gas exists, nor trans port such material. A FIRE, a FAULT or a
INJURY is feared.
Evade a place, where a lot of dusts, wastes or thread chips exist.
If inevitable, clean the dusts and wastes adhered in the blower
regularly.
5.
Dusts：
A FIRE or a FAULT is feared
6.
Ventilation：Select a well ventilated place. It shell not be used in a closed
room or in a case. A
FIRE , a BURN or a FAULT is feared.
7.
Ambient air：Evade a narrow place, for the convenience of maintenance and
inspection.
Select a place, where no external vibration is added to the
blower. If inevitable, take anti-vibration measures for protecting
from addition of vibration the blower. A FAULT, DAMAGE or an
INJURY is feared. The value in Figure 1 is recommended as the
tolerable vibration value.
8. Vibration：
Size and tightening torque (recommendation value) of the anchor bolt
Anchor hole
mm
Bolt size
mm
Tightening torque
N・m
φ
10 M8 11.7
φ
12 M10 23.4
φ
15 M12 41.3
φ
19 M16 105
※ Bolt materials are recommended
values in case of SS, SWRM
(Figure 1)
9. Install the Ring Blow so as to be used in horizontal shaft condition. For installing it in vertical or
slant shaft condition, install it so that its blower side lies under its motor side (Figure 2).
<Good!> <No good!>
①②③ ④ ⑤
(Figure 2)
7

10. Use such pipes as PVC-pipes, gas pipes, flexible hoses etc., which can hold the Ring Blow
pressure and hoses other then metallic one for discharge side, use those once, which have a
sufficient high-temperature resistance.
Lay piping so surely as to have no leakage (Figure 3).
Kind of piping for suction port and delivery port.
Type exclusively used for house
Piping for Ring Blow
11. Do not allow any foreign material to intrude into the blower.
Ideally, use pipes having the same
diameter as standard pipes.
Caution ：Arrange pipe-supports properly, so that no sel
f
weight and external load concentrate on pipe
connections.
Economical for high pressure
and small Air flow, as small
pipes may be used.
Use large diameter pipes for long
piping having many bends
Pipe joint
Pipe support
Construct piping surely with no leakage.
Pressure and Air flow will be reduced by
leaka
g
e.
（Figure 3）
Type for house and screwed pipes （Type from VFC408A to VFC608A）
（T
yp
e from VFC088A toVFC308A）In case of flexible house In case of screwed pipes
Fasten surely using
a hose band Commercial pipe
Plastic or steel pipe
Flexible house
（Figure 3）
Fasten surely using
a hose band
Flexible house
Type for companion flanges
※In case of piping to companion flanges,
companion flanges must be remove form the Ring
Blow before piping, it should be assembled afte
r
piping. Take care of the breakage by tighten pipes
too much.
Type exclusively used for screw pipes
（Type from VFC708A to VFC908A）（Type from VFC708A to VFC908A）
Flange
Companion
flange
Plastic or steel pipe
8

12. The rotation direction shall be the arrow direction on the casing. The rotation direction can be
seen at the shaft end at counter-blower side and it is also correct, if the wind direction coincides
with the IN and OUT indicated at the pipe connection port. Reverse rotation is allowed, although
the performance is reduced.
13. Connect the power cables by using gland or electrical conduit at wiring hole of the terminal box to
protect dust, foreign objects, water and etc. into the terminal box inside.
14. Take care of edge of wiring holes at the terminal box. An INJURY is feared.
Operation ------------------------------------------------------------------------
Verify the following points for operating the Ring Blow.
Alarm
1. Never access or touch the rotating body (cooling fan etc.) during running.
CATCH-IN or INJURY is feared.
2. Turn the power supply switch off in case of power failure.
INJURY is feared, when the machine runs suddenly at the power restoration.
3. Be sure to turn the power supply switch off, in the Ring Blow has been stopped
because the attached protection unit has been activated. An INJURY is feared, as the
machine may run suddenly at the power restoration.
Alarm
4. If any abnormality occurs, stop the operation immediately and turn the power supply
switch off. An ELECTRIC SHOCK, an INJURY or a FIRE is feared.
5. During operation the Ring Blow, it becomes considerably hot. Take care not to touch
by your hand or body. A BURN is feared.
6. During its operation, do not insert your finger or any other object into the opening (fan
cover, admission and discharge ports etc.) of the Ring Blow.
An ELECTRIC SHOCK, an INJURY or a FIRE is feared.
7. If the Ring Blow is operated with closed condition, the motor and blower temperature
rises drastically and its distortion or damage after long time operation is feared.
8. If the Ring Blow is operated at a wind flow rate not more then continuous operation
range, the motor and blower temperature rises drastically and its distortion or damage
is feared, if the operation is continued for along time.
9. The temperature of the air passing through the Ring Blow rises. Especially it reaches
a high temperature at a nearly closed condition. Take care not to touch it by your
hand or body. A BURN is feared. Figure 6 shows the temperature rise.
10. During its operation, the Ring Blow and discharged air will reach a considerably high
temperature. Do not use it in a narrow closed room. A BURN, a FIRE or DAMAGE is
feared. (Inquire of us, if you use it in closed operation.)
9

11. The Ring Blow will be continuously at within the operation range shown on the wind flow rate to
static pressure curve (shown in the catalog). This operation range is so wide that the machine can
be operated at nearly closed pressure but, if you operate it at high pressure, especially take care
not to exceed the operation range. If you must operate it at closed condition, arrange a bypass
hole on the way, so that a more wind than required range flows through the blower even if the
suction port is closes (Figure 4).
Delivery Suction
Item
Model sec ①Q ② sec
①Q ②
VFC088A,088P Cont. 0 Cont. 0
VFC108A,108P 600 0.05 /
0.1 600 0.05 /
12. For using air intermittently, the switching by means of a valve is recommended rather than the
switching on and off of the motor (Figure 5). The standard for start and stop frequency of Ring
Blow shall be not higher than the values in table below.
①Shut-off allowable time(sec)starting at a normal temperature.
②Minimum required air flow at 50/60Hz
Q=㎥/min
（Figure 5）
For using with the suction side closed
Bypass hole
Valve
Valve Release
Switch suction and blow using the valve.
(Suction)
(Blow)
Product（Load）
Suction Blow
（
Fi
g
ure 4
）
Valve
For using with the discharge side closed
Bypass hole
Valve
0.1
VFC208A,208P 240 0.1 / 0.1 240 0.1 / 0.1
VFC308A,308P 120 0.3 / 0.4 120 0.3 / 0.4
VFC408A,408P 120 0 / 0.1 120 0 / 0.1
VFC508A,508P 60 0.2 / 1.3 60 0.2 / 1.2
VFC608A 60 0.8 / 1.6 60 0.8 / 1.6
VFC708A 30 1.8 / 2.5 30 1.5 / 2.0
VFC808A 30 2.5 / 4.0 30 2.0 / 3.0
VFC908A 30 4.0 / 5.5 30 3.0 / 4.0
10

Tolerable start/stop frequency for Ring Blow［Sw/Hr］
Model Value for frequency of 50/60Hz
VFC088 – VFC308 30/20
VFC408 – VFC608 20/15
VFC708 – VFC908 15/10
*1 switch：one cycle of ON and OFF
13. The characteristics differ a little when the machine is used at suction side and when used at
discharge side, as shown in the characteristics curve. As the air specific weight becomes larger,
when the discharge side is throttled, the static pressure becomes also larger.
14. Remove any solid object, dust, thread chip, water drop or the like before entering into the Ring
Blow. Even if make no dust be sucked directly, take measures not to suck any dust staying around
by mistake. Use of the dust staying around by mistake. Use of the dust collection sack in a
vacuum cleaner or the like is recommended.
Also, it is recommended to use a filter having considerably large space. Remove sometimes the
dust collected in the filter. It may also be possible to make the dust blow off by reversing the Ring
Blow, if it is possible.
15. If dusts adhered inside and outside of the blower (especially in the cooling air path for cooling fan
cover), remove them. If adhered dusts increase, it causes such troubles as a temperature rise, a
sink of wind flow rate and an increase vibration.
16. As the motor load (current) changes depending upon the air flow used by the Ring Blow, refer to
the characteristics curve for setting the wiring capacity and protection relay.
17. The bearing, oil seal and silencer are consumables and need to be changed when their lives are
arrived. Depending on the environment, in which the machine was used, the Impeller, casing,
casing cover, and wire net are also included in consumables.
Intervals for inspection and exchange of consumables
Part name Inspection/exchange interval *Standard for use in a standard environment.
They may be shorter depending on the environment.
Bearing 2 years
Oil seal At the same time as bearings
Silencer 2 years
Table of bearing and oil seal
Bearing Oil seal
Model Grease
Load side No-load side Model Material
UreaVFC088A 6201ZZ 6201ZZ - -
UreaVFC108A 6202ZZ 6202ZZ 20-30-5 Nitrile rubber
UreaVFC208A 6202ZZ 6202ZZ 20-30-7 Nitrile rubber
UreaVFC308A 6202ZZ 6202ZZ 20-30-7 Nitrile rubber
UreaVFC408A 6203ZZ 6203ZZ 22-35-7 Nitrile rubber
UreaVFC508A 6205ZZC3 6205ZZ 35-47-7 Nitrile rubber
UreaVFC608A 6205ZZC3 6205ZZ 35-47-7 Nitrile rubber
UreaVFC708A 6306ZZC3 6206ZZ 38-58-8 Nitrile rubber
UreaVFC808A 6308ZZC3 6207ZZ 50-64-10 Silicon rubber
UreaVFC908A 6309ZZC3 6306ZZ 55-72-9 Silicon rubber
※Common to VFC-A, VFC-P,VFC-PN, VFC-AN, VFC-A-4Z
11

(Figure 6) Discharged air-temperature rise curve
※Common to VFC-PF
,
VFC-PN
,
VFC-AN
,
VFC-A-4Z
18. Wire the power cables with motor terminals surely according to wiring figure in the terminal box or
Figure 7.
(※Wiring type of VFC808 and VFC908 is direct start type at shipping, therefore, change wiring type
from direct start type to star-delta start type in case of using star-delta start type.)
VFC088P～VF508P VFC088～VFC708
Model VFC808, VFC908
Wires 2 wires 3 wires 6 wires
(Figure 7) Wiring diagram
19. Confirm below items at test running, if inverter is applied for the Ring Blow operarion.
・Resonance is feared by install condition of the Ring Blow. Avoid the frequency of the resonance
・Vibration and noise become bigger by using inverter. Stop the operation immediately, if abnormal
temperature rise or vibration occurs.
・Do not use over 60Hz to protect motor burning.
(Maximum frequency of the 50Hz exclusive model is 50Hz.)
Direct start type
(At shipping)
Star-delta start type
Connecting
method
Power supply
UV
R S
Motor terminal
UVW
R S T
Power supply
Motor terminal
Motor terminal
V2 W2 U2
U1 V1 W1
R S T
Power supply
U1
V2 V1
U1V2 V1
W2 W1U2
W2 W1U2
Power supply
Motor terminal
12

Faults and Countermeasures-----------------------------------------------
In case of occurrence of any fault in the Ring Blow, handle it properly referring to Table 1 “Fault
States of Ring Blow and Countermeasures” (page 12) and taking care of the following points.
Caution
1. Always only the expert shall investigate, repair, disassemble and modify the fault. An
INJURY due to the Impeller edge or key groove, an ELCTRIC SHOCK or a FIRE is
feared.
2. If the Ring Blow must be abandoned as the result of investigation in a rare possibility,
dispose it as a general industrial waste.
3. If the investigation result shows that the machine cannot be easily repaired, if you will
request any spare part or you have any trouble, contact our agent, dealer or business
office at any time. In case of contacting us, please verify following items in advance:
(a) Model indicated in the nameplate,
(b) SER. No.,
(c) Details of the fault,
(d) Name of faulty part, name of spare parts,
(e) Required quantity and
(f) Kind of gas to be transported （e.g.Air）
13

Table - 1 Fault States of Ring Blow and Countermeasures
States of Fault Causes Countermeasures
Switch-contact fault Repair switch-contact.
Fuse blown Replace it.
One phase of power supply
connection wires disconnected.
Replace it.
One phase of stator coils
disconnected.
Request factory to repair it.
Whining sound
Stator and rotor come into contact
due to bearing fault.
Replace bearing.
Foreign material involved in blades. Remove it.
Does not
rotate
Power failure Consult with utility company.
2 phases of power supply connection
wires disconnected.
Replace them.
2 phases of stator coils disconnected. Request factory to repair them.
No sound
Switch fault Replace or replace it.
Insufficient fuse capacity Replace it with lager capacity.
Fuse blown
Short-circuit in circuit Repair or replace it.
Power supply voltage fell Consult with utility company.
Single phase operation Request factory to repair it.
Motor overheated
Impeller rubbing Adjust wheel.
1 phase short circuit in stator coils. Request factory to repair it.
Whining sound Uneven space between stator and
rotor.
Request factory to repair it.
Blade wheel rubbing Adjust it.
Rotates
Blade damaged due to foreign
material.
Request factory to repair it.
Abnormal noise
Bearing fault Replace it.
Leakage in piping. Fasten tightly.
Piping blocked Ventilate sufficiently.
Reverse rotation direction Correct connection (2 out of 3
wires).
Motor rotates but
fan works
improperly.
Closure equipment fault Replace it.
14

Parts List and Disassembled Drawings ----------------------------------
The Parts List of Ring Blow is shown below.
The Parts No. in Parts List corresponds to those in Disassembled Drawings.
Caution: Some parts are not used for some machine models.
Part No. Name of Part Part No. Name of Part Part No. Name of Part
1-1 2-20 4-14
Casing Cover Washer Silencer Box Nut-Frame
Bolt-Casing Cover Rotor and Shaft Assembly Bolt-Bearing Retainer-Front
1-2 3-1 4-19
1-3 3-4 4-19
Impeller Bearing-Rear Bolt-Bearing Retainer-Front
2-1 3-5 4-20
Casing Bearing-Front Bearing Retainer-Front
2-2 3-6 4-24
Bolt-Casing Bearing Shim Front Frame Cover
2-3 3-7 5-1
Spring Washer Plate Retaining Terminal Box
2-4 3-8 5-2
End Cover Bolt-Impeller Gasket-T.Box
2-5 3-9 5-3
Bolt End Cover Tab Washer Cover-T.Box
2-6 3-11 5-4
Spring Washer Key-Impeller Bolt-T.Box
2-7 3-12 5-5
Silencer Assembly Motor Fan Washer-T.Box Ground
2-8 3-13 5-7
Flange Bolt-Motor Fan Bolt-T.Box Cover
2-9 3-14 5-8
Bolt-Flange Key-Motor Fan Grommet-T.Box
2-10 3-15 5-9
Gasket-Flange Collar Bolt-Ground
2-11 4-1 6-1
Threaded Flange Frame Stator Capacitor and Cap. Assy
2-12 4-4 6-2
Bolt- Threaded Flange Rear Housing Bushing-Capacitor
2-14 4-5 6-4
Shaft Seal Spring Washer Cap-Capacitor Assembly
2-15 4-7 6-5
Silencer Retaining Net Bolt-Rear Housing Washer-Capacitor
2-16 4-8 6-6
Silencer Box Fan Cover Bolt-Cap. Lead
2-17 4-9 6-7
Bolt-Silencer Box Bolt-Fan Cover Bolt-Cap.
Lifting Bolt Bolt-Frame Spring Washer
2-18 4-13 6-8
（3-7，3-8，3-9，4-8，4-9） VFC108A,AF(P) : Not applicable
（5-1，5-2，5-3） VFC088A,AF(P,PF), Thru VFC308A,AF(P,PF) And VFC408P : Not applicable
（3-15） VFC088A,AF(P,PF), 508A,AF(P,PF) Thru VFC708A : Not applicable
15

VFC088A～VFC608A, VFC088P～VFC508P
VFC708A～VFC908A
16

VFC088AF～VFC608AF, VFC088PF～VFC508PF
17

Guarantee Period and Scope of Guarantee ----------------------------
＜Product guarantee and scope of guarantee＞
・The guarantee period of for product shall be 1 year after shipment to the specified destination. If any
fault has occurred during the guarantee period in a proper use condition within he product
specification range, the faulty part will be exchanged or repaired free of charge.
・However, if the fault corresponds to any of the following cases, it will be excluded from the scope of
guarantee:
1）due to improper handling or use by the User
2）due to causes of fault other then of delivered product
3）due to improper repair of modification
4）due to natural calamity or disaster, which does not belong to the responsibility of supplier. The
said guarantee means the guarantee for supplied product itself and we take no responsibility
for the damage induced from the fault of the product. The guarantee is effective only in Japan.
＜Charged repair＞
・The investigation and repair after the expiration of guarantee period will be charged. Even during the
guarantee period, we accept the repair of fault and the cause investigation due to reasons out of the
scope of guarantee for payment.
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