Page 1
ROTARY EVAPORATOR
RE200
RE400
RE500
(AC100V)
First Edition
●
Thank you for your Yamato Scientific RE Series Rotary Evaporator purchase.
●
For best test date, we recommend you purchase our BM series Water Bath.
Please call Yamato Scientific for more details.
Read and apprehend the important warnings in this
instruction manual prior to use.
Page 2
Table of Contents
1. Specifications.....................................................................................................................................1
2. Safety Information ..........................................................................................................................2-5
Safety Symbols…………………………………………………………………………2
Safety Precautions…………………………………………………………………...3-4
Hazardous Material…………………………………………………………………….5
3. Identification of Parts.....................................................................................................................6-8
with Condenser A………………………………………………………………………6
with Condenser B………………………………………………………………………7
with Condenser C………………………………………………………………………8
4. Installation/Assembly...................................................................................................................9-20
RE200………………………………………………………………………………...9-10
RE400/500……………………………………………………………………………...11
Steam Duct…….……………………………………………………………………….12
Glassware
Arm Jack for RE200…………………………………………………………………...17
Lift for RE400/500.…………………………………………………………………….18
Connecting the Vacuum Hose and Water Supply………………………………….19
Power Requirements/VacuumController/Bath……………………….……………..20
……………………………………………………………………………
.3-16
5. How To Operate ...............................................................................................................................21
6. Troubleshooting Guide...................................................................................................................22
Problem Solving Chart………………………………………………………………..22
7. Wiring Diagram ...........................................................................................................................23-25
RE200…………………………………………………………………………………..23
RE400…………………………………………………………………………………..24
RE500……..……………………………………………………………………………25
8. Lists of Exchange Parts..................................................................................................................26
9. After Sale Service and Warranty ....................................................................................................27
Request for Repair…………………………………………………………………….27
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1. Specifications
Type RE200 RE400 RE500
Rotation Speed *1
Accuracy of display
‑±
rotation speed *1
Drive system Worm gear system
Rotation speed
‑
display system
Resolution of rotation
‑
speed display
Movable Steam Duct Mechanism, Flask Remover
Other Supplemental System
- Power Socket ( for Vacuum Controller )
Glass Joint 29/38 Steam Duct, S35/20 Receiving Flask
Lift Mechanism Arm jack Manual
Motor Induction motor 25W
Glass set Type A, Type B, Type C
Safety device Overcurrent protection ( fuse 2A )
Exterior dimensions
420×290×835 420×340×580
W×D×H (mm) *2
20‑180rpm
3rpm(at 20‑180rpm)
Digital
1rpm
Weight 11kg 13kg 14kg
Power source (RE only)
●
Evaporation Flask (opaque & frosted
2000ml/500ml/300ml/200ml/100ml
●
Receiving Flask ( opaque & frosted S35/20)
2000ml/500ml/300ml
Option
Combination apparatus
*1 The rotation speed indicates performance of the unit equipped with (A, B or C type) glass set in case
of unloaded operation under rated power.
●
Joint (opaque & frosted )
29/42-29/38, 29/42-24/40, 29/42-19/38,
29/42-15/25, 24/40-24/40
●
Trap Ball (opaque & frosted )
29/42-29/38, 29/42-15/25, 24/40-24/40
●
Water Bath BM100/200/400
●
Oil Bath BO600
●
Arm Jack JK200( for RE200 )
AC100V±10% 50/60Hz 1A
29/42)
*2 Glass set is not included.
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2. Safety Information
Safety Symbols
Graphic Indications
This instruction manual and our products apply various indications for safety. Ignoring these
indications can cause such situations as listed below. Read and understand the following warning and
caution signs in this manual prior to use.
WARNING
CAUTION
(Note 1) Serious injury : Bodily harm by electric shock, bone fracture or poisoning which m ay require
hospitalization.
(Note 2) Injury : Bodily harm by electric shock, bone fracture or poisoning which may not require
hospitalization.
(Note 3) Damage : Any damage on equipment, facility, structure, etc.
Indicates the possibility of serious or fatal injury (Note 1).
Indicates the possibility of injury (Note 2) or damage (Note 3) to the
equipment.
Meaning of Graphic Indications
Shows warning or caution.
Specific contents are described aside each sign.
Shows users important information not to do.
Specific contents are described aside each sign.
Shows users important information sure to do.
Specific contents are described aside each sign.
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Safety Information
Safety Precautions
If the motor overloads - Stop operation immediately.
If you continue operation under abnormal overload conditions, the motor may stop by the safety
device . If the motor stops, turn the volume knob to the minimum and cut the switch off.
Overload means the situation when the mo tor surface heat s up more than 90
＊＊＊＊
rust on ball bearing etc.,
due to
℃℃℃℃
Never fail to ground the unit.
This unit uses a 3-core power cord (including ground wire). Be sure to ground the unit for safety.
Be cautious using flammable chemicals.
This unit is not explosion proof. Do not use in flam m able or explosive gas environm ents and do
not evaporate explosive substances.
The flask clamp is very springy. Be careful not to break the glass apparatus.
The enclosed flask c lamp is very springy to hold the glass apparatus firmly. Be careful not to
break the glass.
Use a trap.
Use a trap when you decompress by hydraulic rotary vacuum pump. W hen you use our Handy
Aspirator, fill to overflow.
Maintain the vacuum seal.
●
The vacuum seal is expendable. Exchange the seal in case of vacuum-down.
●
You can use the vacuum seal without grease. But if you desire more longer life of the seal, put
silicon grease onto the ripped side of vac uum seal. If you are afr aid of sam ple contam ination,
use liquid sample.
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Safety Information
Safety Precautions
Cleaning the exterior of the RE series evaporator
Do not use any volatile chemicals to clean the exterior of this unit. This could damage the c olor
and shape. Wipe clean with a soft dry towel, etc.- Do not use a brush.
If the unit is not in use for a long period of time, cut the power supply.
If the unit is not in use for a long period of time, turn the power off and pull out the power cord for
safety.
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Safety Information
Hazardous Material
Do not use the Unit in flammable or explosive gas environments of substances
listed below. Do not evaporate explosive substances.
Nitroglycol, Nitroglycerin, Nitrocellulose, and other explosive nitric
esters.
Trinitrobenzene, Trinitrotoluene, Picric ac id, and other explosive nitro
compounds.
Peracetic acid, Methyl ethyl ketone peroxide, Benzoyl peroxide, and
other organic peroxides.
Sodium azide, and other metallic azides
Metallic lithium, Metallic potassium, Metallic sodium, Yellow
phosphorus, Phosphorus sulfide, Red phosphorus, Celluloid, Calcium
carbide, Lime phosphate, Magnesium powder, Aluminum powder,
and other combustible metal powders and sodium dithionite
(hydrosulfite).
Potassium chlorate, Sodium chlorate, Ammonium chlorate, and
other chlorates.
Potassium perchlorate, Sodium perchlorate, Ammonia perchlorate,
and other perchlorates.
Potassium peroxide, Sodium peroxide, Barium peroxide, and other
inorganic peroxides.
Potassium nitrate, Sodium nitrate, Ammonia nitrate, and other
nitrates.
Explosive
Explosive
Substance
Combustible
Substance
Oxidant
Flammable
Ignitable
Substance
Combustible
Gas
Sodium chlorite and other chlorites.
Calcium hypochlorite and other hypochlorites.
Ethyl ether, Gasoline, Acetaldehyde, Propylene Oxide, Carbon
disulfide, and other flammable substances with a flash point below
minus 30ºC.
Normal hexane, Ethylene oxide, Acetone, Benzene, Methyl ethyl
ketone, and other flamm able substances with a flash point between
minus 30ºC and 0
Methanol, Ethanol, Xylene, Pentyl acetate (amyl acetate), and other
flammable substance with a flash point between 0ºC and 30ºC.
Kerosene, Light oil, Turpentine oil, Isoam yl alcohol, Acetic acid, and
other flammable substances with a flash point between 30ºC and
65ºC
Hydrogen, Acetylene, Ethylene, Methane, Ethane, Propane, Butane
and other flammable gas at 15℃ degree and under 1 atmosphere.
o
C.
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RE200(type A)
Vacuum Pipe
3. Identification of Parts
with Condenser A
Control Box
Cooling Water
Pipe
Cock
Opening to Pour Sample
Cooling Condenser (A)
Steam Duct Holder
Flask Clamp(2)
Receiving Flask
Steam Duct Holder
Arm Jack
Stand
RE400(type A)
Volume Knob
Motor
Flask Remover
Flask clamp(1)
Evaporation Flask
Water Bath BM200
RE500(type A)
Vacuum Controller VR100
Rotation Speed
Display
Big Knob
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RE200(type B)
Identification of Parts
with Condenser B
Cooling Condenser(type B)
Condenser Connector
Cooling Condenser Holder
Cooling Condenser Holder Shaft
RE400(type B) RE500(type B)
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RE200(type C)
Cooling Condenser(type C)
Identification of Parts
with Condenser C
Cooling Condenser Lid
RE500(type C)RE400(type C)
＊
Please understand that our products are subject to some specification changes without notice.
＊
The exterior designs above are just examples of the interchangeable parts.
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4. Installation/Assembly
RE200
1.Set the stand at a stable place.
Unpack the package and set the stand of the body on a stable place. If you do not set the unit on a
stable place, the unit may vibrate or cause strange noises or the unit can fall and get damaged.
2. Insert the rod into support of the stand.
Insert the support rod into support of the stand, and fix by clamping screw.
3. Pass the arm jack if applicable, and support clamp over the support rod.
Motor Support Clamp
Support Rod
O-Ring
Fix Ring
Clamping Screw
Stand
1.Turn the Arm Jack Lever counterclockwise to loosen the lever.
2. When you pass the arm jack over the rod, set the fix ring and O-ring in the middle of the arm jack
Arm Jack
Arm Jack Lever
Lock
Unlock
Pass the arm jack over the
rod turning the arrow up.
(Insert the O-ring into the hollow on the fix ring).
3. Fit the motor support clamp over the support rod.
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Installation/Assembly
4. Fix the motor to the motor support clamp.
1. Fit the motor bearing bar to the motor support clamp, and fasten the clamping screw tightly.
Put D-cut surface ( flat surface ) of the bar perpendicularly to the screw.
Bearing bar
Motor Support Clamp
2. Slant the motor to the right (about 45°) and fix the finger screw of the motor tightly.
If you do not fasten the screws tightly,
RE200
vibration may occur preventing accurate
measurements or the motor may fall causing
the glass apparatus to break.
Finger Screw
5. Fix the controller to the support rod.
Fix the controller to the support rod by attached clamping screw.
Clamping Screw
Controller
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Installation/Assembly
RE400/500
6. Set the Body at a stable place
Be sure to set the body at a stable place.
7. Fix the motor to the body.
1. Insert the motor bearing bar into the motor support clamp of the body, put D cut surface (flat
surface) of the bar perpendicularly to either 2 upper or side screws, and fasten 4 fix screws tightly
by using the attached hexagonal wrench (for M5).
Then, slant the motor to the right (about 45°), and fix the finger screw of the motor tightly.
If you do not fasten t he screw s tight ly, vibrat ion may occur prev enting accurat e
measurements or the motor may fall causing the glass apparatus to break.
Motor Support Clamp
2. Remove the cooling condenser nut (the bigger nut with the coil ring) and coil ring when you fix the
motor.
Finger Screw
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Installation/Assembly
Steam Duct
8. Inserting the steam duct into the motor
1. Before you insert the steam duct, make sure that the O-rings in the center hole of motor are not
out of place. If so, reset them in the right place.
2. Insert the steam duct from the right side into the center hole of the motor .
3. Set the steam duct to the desired position with a minimum of 5mm between the blue flask
remover and the steam duct holder.
4. Tighten the steam duct holder by turning clockwise. Be sure to tighten the steam duct holder firmly
so that the steam duct does not slip.
Steam Duct Holder
Flask Remover
Rubber O-Ring
Steam Duct
When removing the steam duct, first loosen the steam duct holder. Do not remove the
＊＊＊＊
steam duct holder or the rings may slip out.
If the rings come off in setting/removing the steam duct, and you do not know how to
●
assemble….
See the following picture to re-assemble.
Keep at least 5mm
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Installation/Assembly
Glassware
9. Set the cooling condenser nut, coil ring and vacuum seal to the condenser
or condenser connector.
1.Remove the cooling condenser nut on the left
side of the motor.
2.Connect the cooling condenser nut and then
coil ring to the condenser or condenser
connector (which ever applies).
3.Insert the vacuum seal to the condenser or
condenser connector (which ever applies).
*
It is optional to put grease on the vacuum seal.
10. Connect cooling condenser or condenser connector to the motor.
Insert the steam duct into vacuum seal, put glass flange to the m otor and f asten firm ly the cooling
condenser nut.
Be careful not to damage the vacuum seal when you in sert steam duct into the vacuum
＊＊＊＊
seal in case the damage could cause leak.
Glass Type A Glass Type B/C
Vacuum Seal
Coil Ring
Vacuum Seal
Coil Ring
Above :
●●●●
Below :
When you remove the coil ring from cooling condenser or condenser connector
Fitting of Coil Ring and Vacuum Seal
Fitting to Motor
Hook the coil ring by the attached hexagon wrench as shown in the left
picture in order to remove the ring easily from the cooling condenser or
condenser connector. However, be careful not to force too hard in case
the glass apparatus or coil ring might be damaged.
Above :
Below :
Fitting of Coil Ring and Vacuum Seal
Fitting to Motor
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Installation/Assembly
Glassware
11. Connecting the cooling condenser holder shaft (glass set B and C only).
Fit the cooling condenser holder shaft firmly into the screw hole on the back of motor. Put the
attached hexagon wrench through the hole on the end of shaft, and fasten tightly.
RE200
Holder Shaft
RE400/500
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Installation/Assembly
Gllassware
12. Connecting the cooling condenser and condenser holder
(B & C condenser only).
1. Connect the cooling condenser to the condenser connector and hold by the cooling condenser
clamp.
2. Insert the cooling condenser holder from the top of condenser, while fitting the other side
through the holder shaft. (For type C, be sure to insert the cooing condenser holder fr om the
bottom of condenser rather than top and then connect the condenser to the condenser
connector)
Cooling Condenser Clamp
3. Fit the suction cock to type B or the cooling condenser lid to type C.
Suction Cock
Cooling Condenser Holder
Condenser Lid
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Installation/Assembly
13. Connecting the Evaporation and Receiving Flasks.
Glassware
Evaporation Flask
●●●●
1.Turn the blue flask remover upward.
2.Connect the flask to the steam duct, and
hold by the evaporation flask clamp.
For easy evaporation flask removal….
●
Use the blue flask remover.
1. Remove the clamp while holding the evaporation flask.
2. Turn the remover counter clockwise which will gently push off your evaporation flask.
Flask Remover
1.Connect the flask to the cooling condenser
or the condenser connector, and hold by the
flask clamp.
Receiving Flask
●●●●
14. Insert the feed tube into the cooling condenser or cooling condenser
connector (which ever applies). Assembly is now complete.
Feed Tube
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Installation/Assembly
Arm Jack for RE200
15. Arm jack JK 200(sold separately and exclusively used for RE200)
To set at a certain height
●●●●
1. Turn the lever counter-clockwise to loosen and move up or down to desired height. →Picture 1,2
2. When you determine the position, turn the lever clockwise and fasten firmly. →Picture 3
3. After you turn the lever to fix, set the fix ring in-between at a certain height.
When you fix , fasten firmly by lever and fix ring. If you do not fasten tightly,
arm jack will not be able to sustain the motor and it could fall.
Do not move it up or down with force when the glass apparatus is connected.
The glass apparatus may come off which can cause damage.
(Picture 1) (Picture 2) (Picture 3)
To change the height
●●●●
1. Turn the lever counter-clockwise to loosen.
(Support the arm jack securely at this time or the motor will immediately drop downward.)
2. Then refer to the above description “To set at a certain height”.
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Installation/Assembly
Lift for RE400/500
16. Manual lift (Supplemental function of RE400/500)
Adjust the lift by using the 2 knobs (big and small) located on the right side of the unit.
1. Loosen the small knob.→Picture 1
2. Turn and keep the big knob to “Release”, and you can freely move the lift up and down.
3. After you determine the position, return the big knob to the original position “Lock” and you can fix
the height.→Picture 2,3
4. After you determine the lowest position, fasten the small knob.→Picture 4,5
The lift will not go lower than the fixed position. However, this function effectively works only when
the small knob is positioned within 5.3 inches ( 135 mm ) from the bottom.
(Picture 1) (Picture 2) (Picture 3)
(Picture 4) (Picture 5)
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Installation/Assembly
Connecting the Vacuum Hose and Water Supply
17. Fit the hose joints to the water supply, drain and vacuum hoses at first,
and connect to the cooling water and vacuum pipes.
1. In case the joints are connected to the condenser, remove them.
2. Insert the hose joints into the water supply and drain hoses (inside diameter, 9mm ) , hold by the
attached hose clamps and fix to the cooling pipes of cooling condenser.
In the same way, insert the hose joint into the vacuum hose (inside diam eter of 6mm ),fix to the
vacuum suction pipe (hose clamp is not necessary).
Do not fit the hoses to the hose joints connected to the condenser.
In case of glass A
●●●●
Connect the drain hose with the inside diameter of
18mm to drain of cooling condenser.
In case of glass B
●●●●
In case of glass C
●●●●
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Installation/Assembly
Power Requirements/Vacuum Controller/Bath
18. Connect the power plug into an outlet.
1. Connect the power cord of the body to AC100V power source.
Never fail to connect the earth for safety.
Be sure to switch off whenever you insert or pull out the power cord.
＊＊＊＊
2. Then, joint the motor connecting cable to the socket on the back of controller.
19. Connect the vacuum controller, in case it is attached.
Prepare additionally an aspirator with displacement of 10
＊＊＊＊
●
Combination with the vacuum controller VR100.
You can fix the vacuum controller, as shown in the
right picture, by metal fastener onto the controller
box of RE400/500 Rotary Evaporator.
In addition, you can connect the power cord of
VR100 to the power socket on the back of Rotary
Evaporator controller.
＊＊＊＊
In case of RE200, you can not fix the vacuum
controller on RE200 and connect the power cord of
VR100 to RE200, so set and handle on a stable
place near by.
Look at the back panel of vacuum controller where hoses to connect are indicated. Follow the
indications and connect the hoses.
Be sure to read the attached instruction manual to handle the vacuum controller.
＊＊＊＊
/min. as a vacuum device.
ﾘｯﾄﾙ
ﾘｯﾄﾙ
ﾘｯﾄﾙﾘｯﾄﾙ
VR100
RE400 or RE500
20. Prepare bath (separately sold)
Set the bath in front of the body, and pour water into it.
Be sure to read the attached operation manual to handle the bath.
＊＊＊＊
BM400/BO600 BM200 BM100
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5.
How To Operate
1. Pour cooling water / alcohol into the cooling condenser
●
In case of Glass A or B
Circulate the cooling water in the cooling condenser.
●
In case of Glass C
Put dry ice and pour alcohol carefully so that it does not overflow.
2. Put the sample into the evaporation flask.
Put the sample into the evaporation flask.
Pour sample to the half of th e ev apo ratio n f lask capacit y. Liquid collect ed in th e receiv ing
＊＊＊＊
flask shall be also kept within approximately the half capacity.
3. Heat the bath.
Set the bath temperature at the required degree and heat up to the set point.
4. Take the flask down and start rotation.
1. When the bath temperature reaches the set point, take the evaporation flask down into the bath.
2. Turn on the switch on the right side of control box, and turn the volume knob to rotate at a required
speed.
3. Operate the vacuum device for evaporation.
●
When you supply sample during the unit operating
Connect the teflon tube (inside diameter, 6mm) to the opening for sample and handle the cock to
let a certain amount sucked in.
5. Move the lift up or down after you stop the rotation of evaporation flask.
If the lift is moved up from or down into the bath while the evaporation flask is
rotating, scalding may occur due to dispersing of hot water.
6. When the operation ends
When the operation ends and you want to remove the evaporation or receiving flask , open the cock
and bring back pressure inside the container to normal.
7. Operation after restarting from power failure.
The unit restarts the same operation as before after recovering from power failure.
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6. Troubleshooting Guide
Problem Solving Chart
Trouble & Countermeasure
Check the following points if there should or seem to be some machine trouble. Contact Yamato’s
Technical Service Department in case trouble is not solved in spite of countermeasures below.
Trouble Cause Countermeasure
Digital display does not
light up on the controller.
The flask will not rotate
Incomplete vacuumization
●
Power is off
●
Disconnection of power cord
●
Fuse blows
●
Switch of controller is off
●
Volume knob is at the “min”
●
Disconnection of motor cable
●
Incomplete set-up or fastening
of steam duct cause racing
●
Something touches the flask
●
Wear and deterioration of
vacuum seal
●
Direction of vacuum seal is
wrong
●
Cooling condenser nut is
incompletely fastened
●
Check power source
●
Connect the cord of motor and
body
●
Exchange of fuse(2A)
●
Turn on the switch
●
Turn the knob up
●
Insert into the socket on the
controller
●
Fasten the steam duct holder
●
remove something that contacts
●
Exchange of vacuum seal
●
Re-set the vacuum seal
●
Re-fasten
●
Glass apparatus break
●
Incomplete connection of glass
apparatus
●
Leak from hose joints
●
Exchange
●
Re-set
●
Put vacuum grease on
●
Check, re-fasten and put vacuum
grease on joints
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RE200
7. Wiring Diagram
RE200
Symbol Name of Parts
P1 Power Plug
SW1 Power Switch
SPC1 Speed Control Pack
M1 Motor
G Tachogenerator
C1 Motor Condenser
VR1 Resister to Set Rotation Speed
10.5K
Ω
CN1 Drive Socket
MC Drive Cable
F1 Fuse
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RE400
Wiring Diagram
RE400
Ω
10.5K
Symbol Name of Parts
P1 Power Plug
S1 Power Socket ( Power Source for Vacuum Controller )
SW1 Power Switch
SPC1 Speed Control Pack
M1 Motor
G Tachogenerator
C1 Motor Condenser
VR1 Resister to Set Rotation Speed
CN1 Drive Socket
MC Drive Cable
F1 Fuse
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RE500
Wiring Diagram
RE500
Symbol Name of Parts
P1 Power Plug
S1 Power Socket ( Power Source for Vacuum Controller )
SW1 Power Switch
SPC1 Speed Control Pack
M1 Motor
G Tachogenerator
C1 Motor Condenser
VR1 Resister to Set Rotation Speed
CN1 Drive Socket
MC Drive Cable
F1 Fuse
T1 Transformer
B1 Tachometer Substrate
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8. Lists of Exchange Parts
Name of Parts Parts No. Application
Cooling Condenser (A) RG00A-30021 For A type
Cooling Condenser (B) RG00B-30020 For B type
Cooling Condenser (C) RG00C-30021 For C type
Condenser Connector(B) RG00B-30030 Common use for B&C type
Evaporation Flask RG00A-30040 Common use for all types
Receiving Flask RG00A-30050 Common use for all types
Steam Duct RG00A-30011 Common use for all types
Cock 255191-415 Common use for all types
Suction Cock RG00B-40030 For B type
Cooling Condenser Clamp 7060026002 Common use for B & C type (the life is limited)
Receiving Flask Clamp 7060026004 Common use for all types (the life is limited)
Evaporation Flask Clamp 7060026001 Common use for all types (the life is limited)
Teflon Tube (A) 255191-416 For A type L=540mm
Teflon Tube (B) 255192-417 For B&C type L=350mm
Hose Joint RG00A-30030 Common use for all types
Hose Clamp 4320016004 Common use for all types
Ring (Large) RE500-40093 Common use for all types (the life is limited)
Ring (Middle) RE500-40061 Common use for all types (the life is limited)
Ring (Small) RE500-40073 Common use for all types (the life is limited)
O Ring 4210020011 Used to fix Steam duct (the life is limited)
O Ring 4210020012 Used to fix Flask Remover (the life is limited)
Vacuum Seal RE500-40090 Common use for all types (the life is limited)
Φ
Fuse (for Body) 2100010011
5.2×20 AC125V 2A
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9. After Sale Service and Warranty
Request for Repair
When you request repair
If any troubles should occur, stop the operation immediately, turn the power off, pull the power cord out
and contact Yamato Sciectific’s Technical Service Department.
Necessary information
●
Model Number
●
Serial Number
●
Date of Purchase
●
Distributor Name
●
Information on difficulties
Be sure to show the warranty when service man visits you.
Warranty (Accessory)
●
Keep your warranty card for future references. Check the name of the distributor, date of purchase
and any other contents of warranty.
●
The terms of warranty is one year limited commencing the date of purchase. Repair is made without
charge according to the contents of warranty.
●
As for repair after expiration of the warranty period, consult the seller or our service office. As long as
the function of the unit is maintained by repair, upon your request, we’ll repair it with charge.
Minimum period to keep repair parts in stock
Minimum period to keep repair -parts in stock is 7 years after the production stop. The repair parts
means any necessary parts to maintain the performance of the unit.
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