Yamato LDS User manual

Fume Hood
(Standard, air curtain, desk-top, and low-ceiling types)
LDS
Instruction Manual
First Edition
･Thank you for purchasing Yamato Scientific’s fume hood.
･To use this product correctly, please read thoroughly this
“Instruction Manual” and “Warranty Card” before using.
After reading, please save them in a suitable place for future
use.
Warning: Please read carefully and understand the
precautions in Owner’s manual before using
this product.
Yamato Scientific America Inc．
Santa Clara，CA
Printed on recycled paper。

Table of contents
1. Safety Precautions...................................................... 1
Explanation of symbols...................................................... 1
List of symbol marks ........................................................ 2
Warning/caution ............................................................ 3
2. Before Use ............................................................. 8
Installation method and preparation before use ................................. 8
Installation method......................................................... 12
Utility connection work...................................................... 15
3. Part Names and Functions.............................................. 17
External View ............................................................. 17
Control panel.............................................................. 22
4. How to Use............................................................ 23
Operation Method ......................................................... 23
Wind speed control ........................................................ 25
Replacement of fluorescent light............................................. 27
5. Handling Precautions .................................................. 29
Precautions for operation ................................................... 29
Working surface (excluding the desk top type) ................................. 29
Exhaust blower............................................................ 30
Ambient environment....................................................... 30
Maintenance .............................................................. 30
Others ................................................................... 30
6. How to Care........................................................... 32
Daily check/care........................................................... 32
Maintenance and inspection................................................. 32
7. When not Used for a Long Time, or Disposed............................. 33
When not used for a long time, or disposed ................................... 33
Precautions for disposal .................................................... 33
8. Troubleshooting....................................................... 34
Fault diagnosis ............................................................ 34
9. After-the-Sale Service and Guarantee.................................... 36
When requesting a repair ................................................... 36
Recommendation - maintenance/inspection contract of fume hood ............... 37

Periodic self check in accordance with Industrial Safety and Health Law........... 39
10. Specifications ........................................................ 40
11. Wiring Diagram....................................................... 42
12. List of Hazardous Materials............................................ 43
13. List of Spare Parts .................................................... 44
Mechanical part ........................................................... 44
Electric part............................................................... 44
14. Standard Installation Manual........................................... 45
15. Memorandum - Product Manufacturer and Connection Work Vendor ...... 46

1
1. Safety Precautions
Explanation of symbols
For safety purpose, there are many symbols used in this manual and
on the product. Depending on severity which results from improper
handling without understanding the meaning of them, these symbols
are categorized as shown below.
Please understand the meaning of symbols used in this manual,
before reading the main body of this manual.
Warning
Death or serious injury (note 1) is possible, if the
instruction is not observed.
Caution
Minor injury (note 2) or damage to property (note 3)
is possible, if the instruction is not observed.
(Note 1) Serious injury includes physical damage, electric shock, bone fracture,
poisoning and others which have any aftereffect or require medical
treatment by going to hospital for a long time or admitting to hospital.
(Note 2) Minor injury includes physical damage, electric shock and others
which do not require admission to hospital or going to hospital for a
long time.
(Note 3) Damage to property means damage of property such as facilities,
equipment or building.
This symbol indicates an item which requires “Warning” level
(including “Caution” level) attention.
There is a concrete warning information around this symbol.
This symbol indicates a prohibited item.
There is concrete prohibiting information around this symbol.
This symbol indicate there is a must item.
There is a concrete instruction around this symbol.
About symbols
Meaning of symbol

2
1. Safety Precautions
List of symbol marks
Warning
General warning
High voltage!
High
temperature!
Driving
mechanism!
Explosive!
Cautions
General caution
Electric shock!
Risk of burn!
Do not heat with
no water!
Water leak!
Use water only!
Toxic substance!
Prohibition
General inhibition
Do not use fire!
Do not
disassemble!
Do not touch!
Mandatory
General
mandatory
actions
Connect ground
cable
Set horizontally
Disconnectpower
plug
Periodic
inspection
Use
water
only!
Set
horizontall
y

3
1. Safety Precautions
Warning/caution
Warning
Do not use in flammable/explosive atmosphere
Do not use in flammable or explosive atmosphere.
As this system does not have an explosion-proof structure, it will cause a fire or explosion.
Do not use in a hot atmosphere
●The maximum allowable temperature for fan made by polyvinyl chloride or FRP is approximately
50 °C. Therefore, if it is used in a hot atmosphere, the fan blades may be deformed, which leads
to degraded ventilation performance or high noise level.
●If the working surface is lead-lined or made of epoxy resin, do not work directly on the surface or do
not heat the surface (for example, flowing hot water), because the surface may be damaged.
●The operating temperature of this product is 5 - 35 °C. Therefore, the atmospheric temperature in
the installation site must be maintained within 5 - 35 °C.
Do not use this product for experiments of perchloric acids
If a perchloric acid is used, the exterior and interior of this product may be corroded, which may cause
an explosion.
Do not use for radioactive materials
This product has not been designed to handle any radioactive materials.
Do not use for living beings
This product has not been designed to handle living beings (especially pathogens).
In case of fire
If a fire dumper is installed, it activates in case of fire not to allow the fume hood to discharge any air.
Always connect the grounding wire
Always connect the grounding wire properly, or electrical shock or fire may be caused.
Do not use the power cord with it tied in a bundle.
Bundled power cord may be heated, which may cause fire.
Do not damage the power cord
Avoid damage to the power cord by forcedlybending/pulling/twisting it. Otherwise,fire or electric shock
may be caused.

4
1. Safety Precautions
Warning/caution
Warning
Do not alter the power distribution panel
Do not alter the contents (replace a part or wire) in the power distribution panel, or degraded function
or fire may take place. Also, do not touch the panel with wet hands, because electric shock may take
place due to the power source connected to this product.
Periodically check the wire for windowpane
Opening/closing mechanism of windowpane consists of balance weights which hoist the windowpane
with stainless steel wires. Though typical lifetime of wire is approximately 3 years, it may be broken
earlier than expected, depending on the used condition. Check the wires periodically.
Do not change filter alone
The filter must be replaced by multiple persons with each of them standing on his/her own steps (such
as stepladder). In this case, stepladders must be locked with stoppers and placed on a stable location.
This is a high place work, and therefore, may cause injury when he/she drops.
Do not obstruct the baffle plate.
The baffle plate has been designed in consideration of air flow distribution and discharge of heavy
gases. If the baffle plate is clogged or obstructed by an object, its baffle effect may reduce and the
discharged gas may be flowing in the reversed direction, which will have an adverse effect on human
bodies.
Do not perform any experiments when the exhaust blower stops
If the exhaust blower stops due to defective motor or power interruption, immediately stop the ongoing
experimental work, turn off the main power, and escape to a safe place with clean air supplied.
Do not adjust the damper
The damper has been properly adjusted by authorized person since the fume hood is installed. An
adjustment by unauthorized person may reduce the ventilation performance and cause an unbalance
between intake air and discharged air, which may have an adverse effect on human bodies.
Take care with gas leak (optional)
Care should be taken with gas leak.
Check the type of gas used (town gas or LPG) before use.
Always close the main valve and gas tap when the gas is not used.
The gas pipe/tube must be periodically checked and replaced.
Take care with electric shock at power plug outlet
Anelectric shockaccidentmaytake placeif the powerplugoutleton thefrontfaceofproductistouched
by wet hand, or a conductive material is inserted into the outlet.
Take care with ground leakage of power outlet
The power outlet on the front face of this product must be connected to experimental equipment with
an appropriate resistance. If not, ground leakage or firing may be caused.

5
1. Safety Precautions
Warning/caution
Warning
Do not apply any shocks on the windowpane
Though it is made of tempered glass, the windowpane may be broken by a strong impact, and injuries
may be caused.
Take care with controlled wind speed
The controlled wind speed of this product with the windowpane fully opened does not comply with
“Ordinance on Prevention of Hazards Due to Specified Chemical Substances” and “Ordinance on
Prevention of Organic Solvent Poisoning” of “Industrial Safety and Health Law” of Japan.
Caution
When thunder starts to crash
If thunder starts to crash, immediately turn off the power. Otherwise, fire or electric shock may be
caused.
Prohibition of experimental works using fluorinated acids
Windows and lighting protection cover are made of glass. If a fluorinated acid is used in the hood, the
glasses may be corroded by the acid and become foggy (translucent) to make it difficult to see the
inside clearly.
Do not use fire near the windowpane
Do not use fire near the windowpane. Application of open flame may break the windowpane, which
may result in an injury.
Do not rapidly heat/cool the working surface (Ceramitite)
The ceramitite working surface is made of one-piece ceramic plate, and therefore, may be cracked
when rapidly heated or cooled and result in an injury.
Do not apply shocks on the working surface (Ceramitite)
The ceramitite working surface is made of one-piece ceramic plate, and therefore may be cracked or
broken when a strong impact is applied, which may result in an injury.
Heat source should be used at the center of hood
Experiment which requires a heat source such as burner, hotplate, etc. should be performed at the
center of hood as much as possible.

6
1. Safety Precautions
Warning/caution
Caution
Take care with using heat source
Absorbents which are installed to absorption unit as standard equipment generally exercises its full
performance at gas temperature of less than 40°C.
Take care with using heat source, because the performance significantly decreases, when the gas
temperature exceeds 40°C.
Prepare the extinguisher.
Prepare the extinguisher near the draft chamber for use in case of fire.
Main body
●Though the external surfaces of the main body are coated with chemical proof paint, it may be
corroded if the paint is removed due to flaw on it.
●If the interior material is non-asbestos board, machining or strong impact to it may cause a crack,
etc.
●Large amount of gases which have been generated during experiments adhere to the interior and
working surface as fouling. Clean with water periodically.
Working surface
●If you want to use a heat source (such as gas burner and stove) on ceramitite working surface, place
the attached insulation board between working surface and heat source.
●As the working surface is made flat, please perform your operation within the spot sink not on the
working surface, if fluid may splash.
●Do not leave corrosive or flammable chemical in the hood for a long time.
Permissible heat source
In the case of LDF-150,permissible heat sources arelimited to 2 gas burners or up to 2 kW of electrical
hearing (See P.29).
Cleaning of handles
Handles and handle attachments on front window sash are made of ABS plastic. Clean these parts
with mild detergent. Do not apply any organic solvents to the handle parts to prevent possible
damages.

7
1. Safety Precautions
Warning/caution
Caution
Take care with installation site
Air supply
●Air quantity correspondingto that discharged from fume hood mustbe suppliedto the installation site.
If the air quantity is insufficient, the fume hood may not be able to maintain the design discharge air
flow. If so, countermeasures against insufficient air supply may be required.
Crossed air flow (disturbance)
If a fume hood is installed as shown below, crossed air flow (disturbance) is generated. Depending
on the situation, countermeasures against crossed air flow may be required. It is required that the
wind speed of crossed air flow be less than 20 % of wind speed at the front face of fume hood.
●Near the entrance door of the room
Air flow generated by door opening/closing or by entering/exiting of human body exerts an impact on
the hood.
●Human passage
Air flow is generated by a walking person. (The wind speed is estimated as approx. 1.1 m/s, provided
the walking speed is 4 km/h.)
●Near air outlet for air-conditioning/ventilation on the ceiling plane
The blowing wind speed is depending on the shape of outlet, but typically 4 to 6 m/s. As the air goes
away from the outlet, the speed becomes lower, but in some cases, an air flow with significant wind
speed directly comes into the opening of fume hood, or comes into contact with the front face and
then goes down into the opening.
●Near air inlet for air-conditioning/ventilation on the ceiling or on the wall
The suction wind speed at an air inlet is typically 2 to 4 m/s, somewhat smaller than the blowing wind
speed. The extent of disturbance at an inlet is smaller than that at an outlet, because the wind speed
reduces rapidly, as the measuring position goes away from the inlet.
●Front or side face of floorstanding direct blowing package
As the wind speed of direct installing package is high, its airflow sometimes makes a significant effect
on a place which has a long distance from the front face of the package.
In the case of side installation, the side or front air flow from the package may be re-directed by
contacting to an obstacle such as medicine shelf, and the secondary air flow may affect the hood.
●Near ventilation fan
As the wind speed of ventilation fan for suctioning outside air is as fast as typical household electric
fans, a ventilation fan exerts significant effects on the surrounding area.
The suction wind speed of ventilation fan for air discharge is as same as that for air supply. As the
distance between fume hood and fan becomes larger, its speed becomes lower, but depending on
the situation, the fan may affect the hood as a disturbance.
●Open window/door
Crossed air flow may occur due to blow in/out through the window of the room.

8
2. Before Use
Installation method and preparation before use
1. Confirm the type.
Please confirm that the type you ordered is delivered before starting the installation work. The type
code of this product stands for:
LDS –150 S A
2. Damage
In case you find any damages to the product when you received it, please contact the transporter for
confirmation as soon as possible.
●Shape
None ：Standard type
A ：Air curtain
T ：Desk-top
J ：Low-ceiling
●Working surface material
S ：Ceramitite
E：Epoxy
K：Ceramic steel plate
●Width dimension
120 ：1200 ㎜
150 ：1500 ㎜
180 ：1800 ㎜
●Model name

9
2. Before Use
Installation method and preparation before use
3. Always connect the grounding wire.
●Always connect the grounding wire properly to prevent electric shock accidents due to
ground leakage.
If there are no applicable grounding terminals in your site, please perform required
grounding works [D class grounding work (ex. Class 3 grounding, up to 100 Ω)]. This
grounding work must be performed by an authorized electric work specialist. Please
contact your dealer, us or an electric work shop, if no appropriate person is available.
Operation without grounding may cause electric shock accidents.
●Do not connect the grounding wire to gas plumbing, grounding wire of telephone, or
lighting conductor. Otherwise, fire or electric shock may be caused.
●Do not connect the grounding wire to water plumbing. If vinyl chloride piping exists, the
grounding may be insufficient.
4. Take care with installation site
Fume hoods must not be installed:
●in flammable or corrosive gas atmosphere
●on uneven or dirty floor
●in a humid place
●in a location with large diurnal temperature range
●in a location with ambient temperature of not less than 35 °C
●in a location with significant vibrations

10
2. Before Use
Installation method and preparation before use
5. Do not use in flammable/explosive atmosphere
Do not use this product in flammable or explosive gas atmosphere. As this product is not
explosion-proof, an arc is generated when turning ON/OFF the switch and during operation,
which may cause fire or explosion.
Refer to P. 43, “Hazardous material list” for flammable and explosive gases.
6. Do not modify the product
7. Install on a level surface
●Do not modify the product without our
permission, which may cause a failure.
This product should be installed on a
surface as level as possible. If
installed on an unleveled surface, an
unpredictable trouble or failure may be
caused.
改造
爆発性ガス
可燃性ガス
Explosive gas
Flammable gas
Modification

11
2. Before Use
Installation method and preparation before use
8. Use the power outlet within the capacity
Check the capacity of power outlet at the front of this product, and connect suitable plugs to it
with observing the electrical capacity.
Power outlet capacity: Single phase AC 115 V 15A
9. Installation
This product may topple down by earthquake or strong impact. Take appropriate safety
measures including installing the hood in an empty location.
10. Handling of power cord
Do not use the power cord with it tied in a bundle. Bundled power cord may be heated, which
may cause fire.
Do not modify or forcedly bend/twist/pull the power cord.
Otherwise, fire or electric shock may be caused.
Do not damage the power cord by pinching it with leg of desk or chair, or other objects.
Otherwise, fire or electric shock may be caused.
Keep the power cord away from heating devices such as stove. Burnt sheath ofcord may cause
a fire or electric shock.
If the power cord is damaged (exposed core, or wire discontinuity), immediately turn off the
product power and bus power, and contact your dealer for assistance. If the cord remains
damaged, fire or electric shock may be caused.

12
2. Before Use
Installation method
* For a knock-down product (that can be customized) of a standard or air curtain type, our
workers carry out assembly and installation totally.
Installation procedure for standard, air curtain, and low-ceiling types
This product consists of the hood and frame. Install as shown below:
①At first, put the frame in position. If it is unpractical to put the hood on the frame in the position,
put the hood on the frame in the forward position, and then move them in position.
②Next, remove two blocks which are attached to the lower part of both side plates. (The blocks
are secured with four M8 bolts from the bottom.)
③Then, lift the hood and place on the frame.
Caution
The hood must be lifted with at least 5 persons.
The mood must be lifted with every location of hood elevated evenly, or
interior material may be cracked.
④Install the hood to the frame and secure with the bolts attached. (See fig. 2-1) At this time,
measure the outside dimension between front columns of hood and adjust the dimension to
that shown in “10. Specifications (P. 411” (If the dimensions differ, rattling of door or faulty
operation may be caused).
Fig. 2-1
Hood
Frame
Secure with bolts attached
(4 places)

13
2. Before Use
Installation method
⑤After the upper and lower sections are combined, level the working surface with adjusters and
lock at the positions with lock nuts (see Fig. 2-2)
⑥In the case of air curtain, both the outlet and the fluorescent power cord into theframe through
a through hole in the left. Similarly the switch board cord into the frame through a through
hole in the right. The other type are unnecessary.
⑦Bring the power supply cord for power outlet and lighting and the cord for SW circuit board
into the frame through holes of left side plate and right side plate, respectively.
⑧Bring the differential pressure measurement tubes into the frame through thehole on the right
side plate, and connect each tube to each nozzle at the back side of pre-filter differential
pressure gauge (Fig. 2-2).
Fig. 2-2
Air wheel receiver
Adjuster Magnified
view
Lock nut (tighten upward)
Adjuster lock bracket
Adjuster
Nut (Frame side)

14
2. Before Use
Installation method
Installation procedure for a desk-top type
●Install the desk-top type product as follows:
①Remove two square blocks provided below both side plates of the hood.
(The square block is fixed with four M8 bolts from below.）
②Frame on which the desk-top type is installed
●Confirm that the top surface is free from foreign materials and projection.
●Confirm that the levelness is achieved. (If not, carry out level adjustment.)）
●Confirm that the frame has the capacity necessary for installation of the hood.
③Before placing the hood on the frame, protect the front side of the hood installation location
on the frame with a blanket. After protection, lift up the hood, place it on the protecting
blanket and pull the blanket, together with the hood, to the installation position. When
installation is over, pull out the protecting blanket.
Caution
Five workers must take part in lifting the hood.
When lifting the hood, be sure to lift each point evenly.
Otherwise, the interior material may be broken.
④Measure the internal dimension between hood front panels at two points (upper and lower,
as shown in Fig. 3). Adjust the lower dimension to the upper one. (If upper and lower
dimensions are not equal, door rattling or malfunction may occur.)
Fig. 2-2
Fig. 2-4
⑤Fix the hood and frame with attached fixing brackets and screws.（Fig.2-4）
⑥When fixing is over, seal a joint between the lower end of interior of the main body and the
frame with a silicon caulking agent. This is the end of desk-top type installation procedure.
Fix the hood to the
deck with wood
screws.
Upper
Lower

15
2. Before Use
Utility connection work
Warning
For connection of piping and wiring, contact our office, your dealer or
equipment installation company.
Connection of piping and wiring must be performed by a person who has
special knowledge and skills. If performed by an incompetent person,
leakage of water or gas, electric shock or fire may be caused.
Electric wiring work
Electric wiring works as shown below must be performed on the power distribution panel.
(the distribution board is attached to the right side plate in the case of the desk-top type)
Caution
Make sure that the electric power is disconnected from the product before
starting the wiring work.
①Arrange the terminal block wiring for the exhaust blower in the power distribution panel as
shown in Fig.2-5. The grounding wire must be connected to the grounding terminal block. For
the power outlet and the inverter type ballast the wires go through the hole on the left side
plate, on the other hand, the wires for SW circuit board go through the hole on the right side
plate, into the frame for connection. The inverter type ballast and SW circuit board are
connected through connectors.
図2-5
②Connect the primary power wiring, that is rising from the floor, to each circuit breaker.
Required power supply is AC single-phase 115V or AC tree-phase 220V.
●Always connect the grounding wire properly to prevent electric shock accidents due to
ground leakage.
If there are no applicable grounding terminals in your site, the grounding work [D class
grounding work (ex. Class 3 grounding, up to 100 Ω)] should be performed. This
grounding work must be performed by an authorized electric work specialist. Contact
your dealer,us or an electric work shop, if no appropriate person is available. Operation
without grounding may cause electric shock accidents.
●Do not connect the grounding wire to gas plumbing, grounding wire of telephone, or
lighting conductor. Otherwise, fire or electric shock may be caused.
●Do not connect the grounding wire to water plumbing. The grounding may be
insufficient, if vinyl chloride piping exists.
Ventilator
Ventilator
Power outlet
Inverter ballast
SW circuit board
Grounding terminal block
Body grounding

16
2. Before Use
Utility connection work
③When the wiring has been connected, turn on breakers and push the Exhaust blower
operation switch on the control panel to check the rotational direction of Exhaust and Supply
blowers. If the rotational direction is incorrect, replace 2 of 3 wires U1, V1, and W1 on the
terminal block each other to rotate the fan in the proper direction.
Water piping connection work
The end of rising piping is a flexible tube with it end threaded (nominal diameter 1/2 B, male or
female). Connect this end to a primary piping such as a riser from the floor.
Gas piping connection work (optional)
The end of rising piping is a flexible tube with it end threaded (nominal diameter 1/2 B, male or
female). Connect this end to a primary piping such as a riser from the floor. Ask an authorized
local company for connection of piping.
Drain piping connection work
The size of drain port of this product is as shown in “11. Specifications (P. 40)”. Connect this line
to a primary piping such as a riser from the floor by using vinyl chloride tube for draining. For
product to which a spot sink made of epoxy resin or ceramic steel plate is installed, no bell trap
is attached. For the purpose of deodorization and drainage block prevention, install a dram trap
(ceramic).
Duct connection work
The size of ventilation duct outlet of this product is as shown in “11. Specifications (P.40)”.
Perform the ventilation duct connection works with vinyl chloride ducts, etc.

17
8 6 5
43
132
8 5 0
2 4 0 0
1 8 0 0 7 5 0
7 5 3
21 0
3 5 0
12 0 0
2 0 0
15 0
FL O W MONI T OR
LDS180
Fume Hood
188 9S I N CE
≒63
15 5 0
6 1 5
60 6 8 5
3
１
2
4
8
10
12
11
1
9
15
13
16
18
7
21
24
22
23
19
30
17
20
6
27
5
28
29
26
25
14
3. Part Names and Functions
External View
LDS－180S（Standard type）