Wind-Velocity Sensor (Pitot Tubing)

VAV/CAV for Kitchen-Exhaust Application

VAV/CAV to cope withoil-contained wind in large volume

Round Shape TypeVAV/CAV FOR
KITCHEN-EXHAUSTAPPLICATION
Variable Air Volume, Constant Air Volume

Square Type

Role of VAV/CAV forKitchen-Exhaust Application

FeatureKEEP
WIND-VOLUME
IN BALANCE

VAV is an abbreviation used to indicate"Variable Air Volume" device which is designed
to supply wind always in designated volume no matter how
static pressure inside duct varies.
Wheras CAV is to indicate "Constant Air Volume" device,designed to supply wind always in a specific volume.
Since kitchen of restaurant always deals with fire,it needs a device to exhaust hot air in large volume.

VAV/CAV FOR
KITCHEN-EXHAUSTAPPLICATIONThis is why VAV/CAV for kitchen-exhaust application isuseful to keep air volume applied for entire restaurant in balance.
In addition, equipments applied in exhaust duct aresusceptible to mal-function due to oily dust adhering
on mechanical parts in consequence with poor maintenancegiven to the duct.

Variable Air Volume, Constant Air Volume

Here comes Kuken VAV/CAV specially designed for theapplication with simple maintenance device equippedon to cope with malfunction caused by adherence of oil/dust.

01

Point

Pitot Tube Velocity Sensor Applied
Wind-velocity Reading made at many points
averaging pressure difference realizes stable
control over wind volume.

Perfect for the usefor oily-air exhaust in large volume
required for kitchen.

02

Point

High in Corrosion-Resistance

Shielded Ball-Bearing

Pitot tube applied is in SUS material, high in heat-resistanceas well as in corrosion-resistance. In addition, shielded ball-bearing,specially adopted for square VAV/CAV units, protects itself
to prevent oil from coming in to avoid clogging /adherence.

03

Point

Maintenance Made Simple

Round Shape Type

2Square Type

Product image above is as per year 2021. Details in design may be subject tochange/revision for improvement purpose without prior notice.

Wind-velocity sensor is removable from unit body.
Large inspection port prepared for square-type
facilitates internal visual check.

3

ROUND

FLOW RATE AVAILABLE FOR EACH MODELMODEL
0150

500
130

200

400

1000

800

2500

3000

3500

1300

1760

510

1900

350

2540
2600

700

DIM.φD(DUCT)

DIM.L

150

150

500

0200200

500

0250

250

500

0300

300

500

0350

350

500

10MODEL(CMH)

1130

360

300

Selection table for standard
VAV/CAV is also available at ourweb-catalogue below.

2000

630

230

250

1500

ROUND

MAINTENANCE SPACE
500mm OR MORE

180DIM.X

WIND

3460

1500

2000

2500

3000

3500

4000

3200

4500

5000

5500

4300

6000

6500

7000

1000

2000

5400

3000

8500

9000

9500

5000

6000

10000 10500 (CMH)

7000

8000

9000

10080

10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 20000 21000 (CMH)

4032

15120

20160

0500

200

1000

1500

H0403

400

300

5000404400

400

5000504500

4005000704

700

400

500

2000

MAINTENANCE SPACE
W+100mm OR MORE
W (DUCT DIM.)

230

800

2500

3000

3500

300

1300

SQUARE

1580

510

1900

350

DUCT DIM.

MODEL

W

H

700

800

2280
2600

700

0708

3110

DIM.L

MAINTENANCE SPACE
500mm OR MORE

MAINTENANCE SPACE
W+100mm OR MORE
W (DUCT DIM.)

280
H (DUCT DIM.)

1000

0403

1500

2000

2500

3000

870

0404

3500

3200

4000

5000

5500

4300

1440

6500

1000

2000

3000

4000

7500

8000

8500

6000

7000

9500

10000 (CMH)

8000

9000

9070

10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 20000 21000 (CMH)

4032

15120

18144

*Model selection is made based on "flow rate" available within the range shown in blue color.
*Yellow color indicates the range covering increase/decrease of flow expected after installation.
*Stay within the blue range to minimize noise.

SPECIFICATIONPRODUCT

VAV (ANALOG)

ELECTRONIC CATALOGUE
76543216 15 14 13 12 11 10

19COMMON

50/60Hz

4VA (per 1 unit of actuator not including eletric consumption)

Applicable Temp.

Internal of Duct (0-80℃), Ambient (0-50℃) (No Freezing, No Condensation)
ROUND: 20-500Pa

Material (Body)

FORCED CLOSE

SQUARE: 20-800Pa

Standard: H.D.Galvanized Steel Plate

Painted (Optional)
Wind-Velocity Signal Output

FORCED OPEN

AC 100V±10% (OPTIONAL)

CAV (DDC)

Electric Consumption

Optional: SUS, Galvarium Steel Plate-

DC4〜20mA*1(250Ω or Below, Non-Insulated) *Optional

Voltaged Pulse or DC Voltage（0〜5V, Non-Insulated)

4〜20ｍA (Impedance 224Ω)WIND-VOLUME SIGNAL -Air Flow Signal

DC4-20mA +0〜135Ω

Non-Voltage Signal
from Outside

Command by DDC

0〜10V (Impedance 18.2kΩ)

GROUND
POWER (AC24V)

Special Function*Bypass Interlocked Control *Optional *PrimaRy-Secondary Interlocked Control *Optional

Command for Force Fully-Open/Close

Non-Voltage Signal from Outside (DC5V,5mA)

Time Required to Complete Fully-Open/Close

4

AC 24V±10% (STD)

Static Press. (DifferentiaI)

Selection table and wiring
diagram are available.

VAV (DDC)CAV (ANALOG)

Power Voltage

WIRING DIAGRAM

WIND

DDC COVER

DDC COVER

7500
5000

9000

6480

2020

0708

7000

5180
5400

0704

6000

3880

1150

0504

4500

28050022945500

FLOW RATE AVAILABLE FOR EACH MODEL

MODELL
15045180

The unit equipped with flange-connection is also available.

8WIND45(CMH)

1000

360

MODEL 022945400 560

2500L
150180240130W

MAINTENANCE SPACE
500mm OR MORE

240150DIM.L

The unit equipped with flange-connection is also available.

FLOW RATE AVAILABLE FOR EACH MODEL

MODEL

DUCT DIM.

MODEL

7200
7500

40000708

8000

SQUARE

2020

MODEL 07500

5760

1440

0704

Wiring remains the sameas standard VAV/CAV.

X

4320

11500504

MODEL：VAI-□-2450

240

1000
870

230

5000404DDC
SQUARE

110230H (DUCT DIM.)

MODEL0DDC
ROUND

50

FLOW RATE AVAILABLE FOR EACH MODEL0403(Wind-Volume Signal 4〜20mA)

5050

The unit equipped with flange-connection is also available.

SQUARE

VAVL

229

In order to make perfectcontrol on flow rate, selection
must be done properly withflow rate applicable within thecapacity(sizing) of the unit.
Selection remains the same for
VAV and CAV.

DIMENSIONφD (DUCT DIM.) -3

SELECTION BASED ON FLOW RATE

Command by DDC

140(50hZ) / 120(60hZ) sec. from fully-closed to fully-open

WIRING DIAGRAM other than the above is available in Electronic catalogue.

Fully-Open (Contact Signal)

MAX.Rated AC125V/0.5A *Optional

Standard*The unit with AC24V is not equipped with function to isolate wind-velocity signal from power. Measures must be
taken to make the separation(with transformer) if applied with other controling devices(the one with AC100V isequipped with transformer).
*If multiple units are electrically wired together, apply the same wiring configuration on terminal for each unit.

Appropreate-Opening (Contact Signal)

MAX.Rated AC125V/5A *Optional

Standard

Operation Contact Signal

MAX.Rated AC125V/5A *Optional

https://www.kuken.com/catalog/

5

INSTALLATIONCAUTION IN INSTALLATION

Install the unit in a space (0-50℃) notsubject to water-dripping.

Wind

1. Apply primary treatment with device such as grease-filter to minimize the chance for possible clogging of wind-velocity

φDmoresensor(pitot tube) and movable parts caused by oil-dust.

W

ind

2D o r

2. In order to secure accurate wind-volume reading, avoid partial flow.

Velocity Sensor
Actuatora

INSP
PORTECT.

a bt.3

3. Keep the temperature inside duct below 80℃. Also avoid installing the unit outdoor or in area in temp.exceeding 60℃.

Wind

ind

2W oWindr mo

4. Prepare inspection port on ceiling face for maintenance purpose. Keep sufficient room for maintenance(refer to the product drawing).
W (lorenge rW

Wind

5. Exercise care not to cut or bend the tube connected to wind-velocity sensor.
side)

6. The product could be damaged if it is stored in a location subject to water-spilling/condensation.
7. Do not give shock nor to step on the unit.

00

8. Make sure to install the unit so as to have wind-volume sensor(pitot tube) set on windward side.

If the unit is subject to partial flow generated by elbow locatedupstream, it fails to make accurate reading on wind-velocity. Add
straight line to avoid the problem.

Secure space sufficient to do maintenance/
replacement work (actuator) by preparing
inspect.port on the ceiling (□450 or □600).

9. The unit can be installed in any way as long as it is installed so as to have shaft kept horizontally.
10. Do not screw on surface of the unit or actuator. It may cause malfunction (Round stick-in type is allowed to be screwed atduct-connecting portion: within 30mm from the edge)
11. Take a measure for input signal wiring to prevent electrical noise from coming in.
12. Power cable must be equivalent to 600V vynyl insulated electric wire or cable wire.

Wind

13. Pressure difference between inlet and outlet must be 500 Pa or below for round type, and 800Pa or below for square type.

Wind

Wind

15. Apply measuring voltage 500V or below for insulation resistance test.

Wind2W o
3W or

W (lom o renge r

14. Do not apply flex.duct for straight line located upstream of the unit.

WindφDor m2oDreside)r moW (lorenge rside)

INSPECTION/CLEANING

With elbow (affecting on longer side) appliedW

ind

3D oW (longe rINSPECTION
1. The unit fully opens and fully closed smoothly by giving forced open/close signal.

side)

2. No abnormal noise coming from the body or actuator.

WindW

ind

To maintain the function of the product, follow the instruction below
for periodical inspection/cleaning.

φD

reApply straight line if hopper stays upstream of the unit.

Windor m1oW
rer mo3. Pressure-detection tube is firmly connected to the unit without bend or cut/fissure.

If elbow is adopted upstream of the unit withoutstraight line applied, elbow must be equippedwith guide-vane.

If hopper located upstream
having one end straight, add
straight line.

*The unit is not designed to be directly connected to elbow.

4. No foreign substance is left clogged in pressure-detection tube.

Wind

5. Wind-velocity sensor(pitot tube) is not fissured/damaged and no foreign substance is left clogged inside.
3W orWind(lonW (lonm o reW sidr
ge

ger sid

6. No fissure, deformation, rust appeared on the unit/actuator.
e)

CLEANINGe)

In accordance with the inspection result, clean the followings:
1. Internal of the unit
2. Wind-velocity sensor(pitot tube)

WindWind

4W or

m o reW (lon3W or
ger sidm o re

FREQUENCY OF INSPECTIONe)

1W or

Add straight line between the unit and duct
branched off from main duct.

more

At least once every 6 months (depending on how clean the unit can be maintained).

If duct is designed to be narrowed upstream/downstream of the unit,
apply long straight line.

FREQUENCY OF REPLACEMENT
For preventive measure, following parts are recommended to be replaced periodically.

φdφdApply straight line to connect the unit
to branch pipe located at the end of
the duct line in accordance withdiameter of the unit.

6WindWind

3d 以

4d 以Wind上
3D 以風
向上

φD上

Wind

4D 以上

φD風
向Length of the straight line indicated above is given on reference-basis.
As long as partial flow has been generated further upstream, it may still affect velocity-reading even with remedy applying the configuration shown above.

PARTSFREQUENCY

Wind-Velocity Sensor (Pitot Tube)

4 yrs

Pressure-Detection Tube

4 yrs

Packing for Inspect.Port

4 yrs

Actuator

8 yrs

Bearing

8 yrs

7Kuken Industries Co., Ltd.
2-39 Ohori-Koen, Chuo-ku, Fukuoka, 810-0051 Japan
URL. https://www.kuken.com

TEL. +81-(92)-741-5361

E-mail. info-itn@kuken.com

FAX. +81-(92)-715-0891