MYOTOKU Convum CDV-3V User manual

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【Instruction manual】
Vacuum pump
Model: CDV-3V, 5V
■Thank you for purchasing the CDV
rotary-type vacuum pump.
■Please read this instruction manual
carefully before use.
■Keep this manual in a place where it
can be referred to at any time and look
after it carefully.
(V1.00)
Myotoku Ltd.

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For using it safely.
The following safety precautions are provided to prevent damage and danger to personnel
and to provide instructions on the correct usage of this product.
These precautions are classified into 3 categories; DANGER, WARNING, and CAUTION,
according to the degree of possible injury or damage and the degree of impedence of such
injury or damage.
Indicates an impending hazardous situation which may
arise due to improper handling or operation and could
result in serious bodily injury or death.
Indicates a potentially hazardous situation which may
arise due to improper handling or operation and could
result in serious bodily injury or death.
Indicates a potentially hazardous situation which may
arise due to improper handling or operation and could
result in bodily injury or property-damage only accidents.
①
①Do not use in flammable and/or explosive atmosphere. It may cause fire.
②Do not put flammable solvent or inflammables around a pump. It may cause fire.
③Do not put any obstacle that may disturb the ventilation around a pump. It may cause
overheating and can be the source of burnings and/or fire.
①Make sure to disconnect the electrical supply before installation or maintenance of the
pump.
Do not touch the electrical wiring to avoid electric shock if the pump starts operating
suddenly.
②Make sure the earth ground connection is properly made in order to avoid electric shock
or pump failure. We recommend to install an earth leakage circuit breaker.
③Supply the correct rated voltage to the pump motor. Apply over rated voltage may cause
motor damage or failure and/or fire of the motor.
④Do not put your finger or anything else into the motor orifice. It may cause electric shock,
injury or fire.

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About setting and operating
①Make sure the ambient temperature range is within 7 ~ 40℃when the pump is
operating. .
②Make sure that no corrosive gas, water or oil gets sucked into the pump vacuum port.
(Avoid the suction of air with high temperature or high humidity)
③Avoid places with lot of dust.
④Install indoor and make sure to ensure sufficient ventilation around the pump.
⑤Install in a place with no explosive gas.
⑥Do not expose to direct sunlight.
⑦Install it in a place without danger of ignition
⑧Make sure to use your both hand when carrying the pump.
⑨Blade abrasion particles are blown through the exhaust port due to the blade friction
when the pump is operating. Set the piping with outdoor exhaust if necessary.
⑩When the pump is operating, never touch the fan, the motor or other part of the pump. It
causes injury.
⑪Use the pump within the operating vacuum pressure range.
(See below table for reference)
Model
Operating vacuum pressure range
CDV-3V
-89 kPa ～0 (Atmospheric pressure)
CDV-5V
⑫The pump temperature increases when operating and is still high after stop of operation.
As it causes burns, never touch the pump when it is operating or just after operating.
⑬For safety reasons, install an overcurrent protective device and an earth leakage circuit
breaker.
About maintenance / repair
①When the pump stops unusually, wait until the pump cools down before. Make
sure the temperature is low enough to perform any checking.
②Assembly and disassembly of the pump requires technical knowledge.
③Make sure to disconnect the electrical supply before installation or maintenance of
the pump. Do not touch the electrical wiring to avoid electric shock if the pump
starts operating suddenly.

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TABLE OF CONTENTS
1. PRECAUTIONS BEFORE USING THE PUMP ............................................................................................5
1) Pump appearance inspection............................................................................................................................. 5
2）Preparation................................................................................................................................................................ 5
A) Site installation.................................................................................................................................................. 5
B) Pump installation............................................................................................................................................... 5
C) Pump placement................................................................................................................................................ 5
D) Piping ..................................................................................................................................................................... 5
3）Pump motor operation and protection ........................................................................................................... 6
4）Pump start-up, operation and stopping procedures................................................................................. 6
5）Pump storage ........................................................................................................................................................... 6
2. TROUBLE SHOOTING OF PUMP ..................................................................................................................6
1）The vacuum pressure cannot be adjusted to a high vacuum................................................................ 6
2）Abnormal noise ........................................................................................................................................................ 7
3）Stop of a pump ........................................................................................................................................................ 7
3. DISASSEMBLY AND ASSEMBLY PROCEDURES (EXCHANGE OF A BLADES, AND
REMOVAL OF DEBRIS/FOREIGN SUBSTANCE).........................................................................................8
4. PERIODICAL INSPECTION........................................................................................................................... 11
1) Filter cleaning ........................................................................................................................................................11
2) Piping check ...........................................................................................................................................................11
3) Check of the pump ..............................................................................................................................................11
4) Blade maintenance and replacement............................................................................................................11
EXPLODED VIEW.................................................................................................................................................. 12
PARTS LIST ........................................................................................................................................................ 13

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1. PRECAUTIONS BEFORE USING THE PUMP
1) Pump appearance inspection
Perform a visual inspection of the pump and check whether there is any damaged part
or screw loose, etc.
2）Preparation
A) Site installation
①Install in a place without danger of ignition.
②Install in a place/environment that would not affect the proper operation of
the pump (no gas, no chemicals, etc.)
③Install in a place with no water drop, no oil drop or any other liquid drop. Do
not expose to direct sunlight.
④The allowable ambient air temperature range for this pump is 7～40℃.
In the case there is heating source close to the pump, make sure the ambient
air temperature does not exceed 40℃.
⑤Use in a confined space may cause operation failure due to the heat
generated by the pump. Make sure to ensure sufficient ventilation around the
pump and be careful not to exceed the allowable ambient temperature.
⑥Install in a place where it is not exposed to humidity or dust.
⑦Please install in a place with sufficient space for check and maintenance.
B) Pump installation
①Please install the pump horizontally and in a stable place.
②As the pump makes vibrations during operation, install rubber cushion.
③Do not drop the pump when carrying it.
C) Pump placement
Make sure to always keep enough space around the fan cover. Provide at
least 10 cm free space between the wall and the fan cover for heat dissipation.
D) Piping
①Remove foreign debris from the piping by using air blow if any.
④Shorten the piping as much as possible without stress on piping
connections.
⑤Make sure that no oil or other kind of liquid will be sucked into the piping. In
the case there is oil or moisture in the operating environment, install an oil mist
separator to prevent malfunction of the pump.
⑥Depending on operating environment, install a precision filter (30

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micrometers or less)
⑦When the pump stops, if a reverse phenomenon occur, install a check
valve at vacuum or exhaust port.
3）Pump motor operation and protection
A) The rotation direction is shown on the pump cover.
B) Protection device preparation: there is no overheat control device (thermal
protector) installed on the pump; install an overcurrent protective device and
an earth leakage circuit breaker.
4）Pump start-up, operation and stopping procedures
A) Set the vacuum at the minimum value (atmospheric pressure) before
switching the power on.
B) When operating, the temperature of the pump increases; this is a normal
phenomenon.
C) Set the vacuum at the minimum value (atmospheric pressure) before stopping
the pump.
5）Pump storage
After purchasing and using the pump, when you do not use it temporarily, be careful of
the following matters.
A) Cover and save indoors.
B) Avoid places containing oil and water.
C) Do not store in place with high humidity. Store in place where the temperature
is under 40℃.
2. TROUBLE SHOOTING OF PUMP
1）The vacuum pressure cannot be adjusted to a high vacuum
Cause: suction flow decrease due to clogging of filter.
- Countermeasure: remove the filter and perform an air blow to remove oil. If oil
cannot be removed this way, replace with a new filter.
Cause: the blade does not rotate because of chip, dirt, liquid etc.
- Countermeasure: follow the disassembly procedure steps, remove the debris
or substance.
Cause: the blade does not rotate due to rusting from water intrusion.
- Countermeasure: Disassemble the pump, remove the rust.
Cause: leakage from the piping

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- Countermeasure: change the piping
Cause: screw loosening
- Countermeasure: re-tighten the screw.
Cause: Slow speed rotation because of motor failure.
- Countermeasure: repair the motor.
Cause：blade is broken.
- Countermeasure: replace the blade with a new one.
Cause: blade size difference.
- Countermeasure: replace with correct sized blade.
Cause: blade wearing
- Countermeasure: replace the blade with a new one.
2）Abnormal noise
Cause: screw loosening.
- Countermeasure: re-tighten the screw.
Cause: blade damaged by foreign matter.
- Countermeasure: Disassemble the pump, clean it and replace the blades.
3）Stop of a pump
Cause: blade damaged by foreign matter.
- Countermeasure: disassemble the pump, clean it and replace the blades.
Cause: Friction of rotor and/or other parts when pump is operating under over
pressure.
Countermeasure: disassemble the pump, replace the parts.
Cause: failure of the electrical system
Countermeasure: check the state of wire and connecting terminals, and repair in
case of poor contact and/or disconnection.

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3. DISASSEMBLY AND ASSEMBLY PROCEDURES
(Exchange of a blades, and removal of debris/foreign substance)
・Disassembly and assembly process requires technical knowledge.
Installation and maintenance must be performed by knowledgeable personnel who
understand how pneumatic and vacuum products are to be applied. Do not disassembly
the pump is you do no hat sufficient knowledge about vacuum pumps.
・If required, proceed with disassembly of the pump by following below instructions.
1-1
Remove the 5 screws
1-2
Remove the 4 blades.

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1-3
Remove any residue or foreign
substance on the surface of the pump
frame and lid.
1-4
Remove dust, particles or any foreign
substance attached on the blade,
pump cover and motor part by using
an air blower.

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1-5
Insert the blade in the rotor’s slot.
Make sure to insert the blade in the
correct direction.
1-6
Fasten the pump cover （5screws）

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4. PERIODICAL INSPECTION
1) Filter cleaning
Perform a daily check of the filter condition.
When it becomes dirty, remove the dirt by using an air blower.
In the case the oil cannot be removed by this way, replace with a new filter.
2) Piping check
Check periodically and make sure there is no loose, damaged or broken piping.
3) Check of the pump
Check that the pump is operating correctly. Check that the performance of the
pump is not decreasing.
Replacement of parts will be required in the case of abnormal sound generation.
Contact your representative for maintenance parts purchasing and repair the
pump.
4) Blade maintenance and replacement
Replace the blade when the height reaches 14mm height.
Model
(W) Blade width
(H) Blade height
(non-used)
(H) Minimum height
CDV-3V,5Ｖ
33 ㎜
22 ㎜
14 ㎜

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EXPLODED VIEW

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PARTS LIST
No.
Part No.
Name
Quantity
1
MS008-1
PUMP LID
1
2
MS009-1-1
FRAME
1
3
MS011-1-2
BLADE ROTOR
1
4
M0001-1
BLADE
4
5
MS010-1
MOTOR FRONT LID
1
6
M0008-04-3
SCREW
5
7
M0008-04-2
SCREW
2
8
MS012-1-1
MOTOR FRAME
1
9
E001-10
STATOR
1
10
M0003-2-1
BEARING
2
11
M0002-2
ROTOR
1
12
M0031
BEARING WASHER
2
13
MS007-1
MOTOR REAR LID
1
14
M0008-03-1-1
SCREW
3
15
M0025-1-1
FAN
1
16
M0032
SNAPRING
1
17
M0024-1
FAN COVER
1
18
M0008-02-1
SCREW
3
19
M0008-02-3
SCREW
21
20
M0044
TERMINAL BLOCK
1
21
M0026
TERMINAL BLOCK COVER
1
22
M0007-01
CAPACITOR
1
23
M0029-1
SPRING KEY
2
24
M0042-1
CAPACITOR BOOT
1
25
M0018
BRACKET
1
26
M0008-02-1
SCREW
2
27
M0008-02-6
SCREW
4
28
M0043-2
RUBBER BUSH
1
29
M0043-3
RUBBER BUSH
1
30
A0001-3
SILENCER
1
31
M0009-02
NUT
2
32
M0004-1
BAND
2
33
M0037-5
FILTER
1
34
M0022
CUSHION RUBBER
4