【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 canbe referred to at any time and look after
it carefully.

(V2.00)

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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 suchinjury 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 onlyaccidents.

①① Do not use in flammable and/or explosive atmosphere. It may cause fire.
② Do not put flammable solvent or inflammables around a pump. It may cause fire.
③ Do 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.

① Make sure to disconnect the electrical supply before installation or maintenance of thepump.
Do not touch the electrical wiring to avoid electric shock if the pump starts operatingsuddenly.
② Make sure the earth ground connection is properly made in order to avoid electric shockor pump failure. We recommend to install an earth leakage circuit breaker.
③ Supply the correct rated voltage to the pump motor. Apply over rated voltage may cause
motor damage or failure and/or fire of the motor.
④ Do not put your finger or anything else into the motor orifice. It may cause electric shock,
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injury or fire.

About setting and operating① Make sure the ambient temperature range is within 7 ~ 40℃ when the pump is operating. .
② Make 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)③ Avoid places with lot of dust.
④ Install indoor and make sure to ensure sufficient ventilation around the pump.
⑤ Install in a place with no explosive gas.
⑥ Do not expose to direct sunlight.
⑦ Install it in a place without danger of ignition⑧ Make sure to use your both hand when carrying the pump.
⑨ Blade abrasion particles are blown through the exhaust port due to the blade friction whenthe pump is operating. Set the piping with outdoor exhaust if necessary.
⑩ When the pump is operating, never touch the fan, the motor or other part of the pump. Itcauses injury.
⑪ Use the pump within the operating vacuum pressure range.
(See below table for reference)

Model

Operating vacuum pressure range

CDV-3V
CDV-5V-89 kPa ～ 0 (Atmospheric pressure)⑫ The 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.
⑬ For safety reasons, install an overcurrent protective device and an earth leakage circuitbreaker.

About maintenance / repair① When the pump stops unusually, wait until the pump cools down before. Make surethe temperature is low enough to perform any checking.
② Assembly and disassembly of the pump requires technical knowledge.

③ Make sure to disconnect the electrical supply before installation or maintenance ofthe pump. Do not touch the electrical wiring to avoid electric shock if the pumpstarts operating suddenly.

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TABLE OF CONTENTS
1. PRECAUTIONS BEFORE USING THE PUMP............................................................................................... 51) Pump appearance inspection ............................................................................................................................. 52）Preparation ................................................................................................................................................................ 5A) Site installation .................................................................................................................................................. 5B) Pump installation ............................................................................................................................................... 5C) Pump placement................................................................................................................................................ 5D) Piping ..................................................................................................................................................................... 53）Pump motor operation and protection ........................................................................................................... 64）Pump start-up, operation and stopping procedures ................................................................................. 65）Pump storage ........................................................................................................................................................... 62. TROUBLE SHOOTING OF PUMP ..................................................................................................................... 61）The vacuum pressure cannot be adjusted to a high vacuum ............................................................... 62）Abnormal noise ........................................................................................................................................................ 73）Stop of a pump ........................................................................................................................................................ 7
3. DISASSEMBLY AND ASSEMBLY PROCEDURES(EXCHANGE OF A BLADES, AND

REMOVAL OF DEBRIS/FOREIGN SUBSTANCE) ........................................................................................... 8
4. PERIODICAL INSPECTION .............................................................................................................................. 111) Filter cleaning.........................................................................................................................................................112) Piping check ...........................................................................................................................................................113) Check of the pump ..............................................................................................................................................114) Blade maintenance and replacement............................................................................................................11EXPLODED VIEW ...................................................................................................................................................... 12PARTSLIST ............................................................................................................................................................ 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 partor screw loose, etc.
2）PreparationA) Site installation① Install in a place without danger of ignition.
② Install in a place/environment that would not affect the proper operation ofthe pump (no gas, no chemicals, etc.)③ Install in a place with no water drop, no oil drop or any other liquid drop. Do
not expose to direct sunlight.
④ The 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℃.
⑤ Use in a confined space may cause operation failure due to the heatgenerated by the pump. Make sure to ensure sufficient ventilation around thepump and be careful not to exceed the allowable ambient temperature.
⑥ Install in a place where it is not exposed to humidity or dust.
⑦ Please install in a place with sufficient space for check and maintenance.
B) Pump installation① Please install the pump horizontally and in a stable place.
② As the pump makes vibrations during operation, install rubber cushion.
③ Do 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) Piping① Remove foreign debris from the piping by using air blow if any.
④ Shorten the piping as much as possible without stress on piping
connections.
⑤ Make 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.
⑥ Depending on operating environment, install a precision filter (30
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micrometers or less)⑦ When the pump stops, if a reverse phenomenon occur, install a check valve
at vacuum or exhaust port.
3）Pump motor operation and protectionA) The rotation direction is shown on the pump cover.
B) Protection device preparation: there is no overheat control device (thermalprotector) installed on the pump; install an overcurrent protective device andan 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 normalphenomenon.
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 ofthe 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 temperatureis 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 orsubstance.

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 overpressure.
Countermeasure: disassemble the pump, replace the parts.
Cause: failure of the electrical system
Countermeasure: check the state of wire and connecting terminals, and repair incase 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
Removeany

residueor

foreignsubstance on the surface of the pumpframe 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 thecorrect direction.

1-6
Fasten the pump cover （5 screws）

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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 pumpCheck that the pump is operating correctly. Check that the performance of the pumpis 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

CDV-3V,5Ｖ

33 ㎜

http://www.convum.co.jp(H) Blade height (nonused)(H) Minimum height

22 ㎜

14 ㎜

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11EXPLODED VIEW

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PARTS

LISTNo.

Part No.

NameQuantity

1MS008-1

PUMP LID

12MS009-1-1

FRAME

13MS011-1-2

BLADE ROTOR

14CDV-3V

BLADE(1set 5pcs）

1

CDV-5VBLADE(1set 4pcs)

15MS010-1

MOTOR FRONT LID

16M0008-04-3

SCREW

57M0008-04-2

SCREW

28MS012-1-1

MOTOR FRAME

19E001-10

STATOR

110M0003-2-1

BEARING

211M0002-2

ROTOR

112M0031

BEARING WASHER

213MS007-1

MOTOR REAR LID

114M0008-03-1-1

SCREW

315M0025-1-1

FAN

116M0032

SNAPRING

117M0024-1

FAN COVER

118M0008-02-1

SCREW

319M0008-02-3

SCREW

2120M0044

TERMINAL BLOCK

121M0026

TERMINAL BLOCK COVER

122M0007-01

CAPACITOR

123M0029-1

SPRING KEY

224M0042-1

CAPACITOR BOOT

125M0018

BRACKET

126

M0008-02-1

SCREW

227M0008-02-6

SCREW

428M0043-2

RUBBER BUSH

129M0043-3

RUBBER BUSH

130A0001-3

SILENCER

131M0009-02

NUT

232M0004-1

BAND

233M0037-5

FILTER

134M0022CUSHION RUBBER

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