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- (01-29) -

4-4-7. NOISE CONTROL



CONTROLLING NOISE FROM

EXHAUST/INTAKE OPENING

1. The following components are recommended for a

ceiling-mounted unit.

(1) Noise-reduction duct —— Glass-wool duct

│

└

—

Noise-reduction flexible duct

(2) Noise-reducing intake/exhaust duct

The following option is available for cases in which

the noise reduction measures in “1” above are still

insufficient, or in the case of the ceiling-suspension type.

(1) Highly efficient sound-absorption materials are used

for the interior cover materials.

3. When the airflow sound is generated at the exhaust/

intake opening in the ceiling-mounted type, the following

options are available, as the sound absorption effects

are higher in ducts with smaller diameters.

(1) Branched ducts (the airflow rates at the exhaust/

intake opening are reduced by dividing the flow)

(2) One-rank lower multiple noise-reduction ducts (with

smaller diameters) should be used.



EFFECTS OF NOISE CONTROL

MEASURES

Points

1. The noise-reduction duct (not less than 2m) should

always be used at the exit of the unit on the internal

supply side.

2. Spiral ducts (galvanized steel tubes) and aluminum

flexible ducts should not be connected to the unit exit

opening.

General Comparison of Effects

(1) Great Effects –

(4) Small Effects

(1) Noise-reduction duct, installed

for 6m

(2) Noise-reduction duct on the

side of the unit, installed for 2m

Unit

Noise-reduct

ion duct

(6m)

Intake/Exhaust

Grill

Unit

Noise-reduct

ion duct

(2m)

Spiral Duct

(4m)

Intake/Exhaust

Grill

(3) Noise-reduction duct on the

side of the intake/exhaust grill,

installed for 2m

(4) Spiral duct, installed for 6m (no

noise-reduction measure)

Unit

Spiral Duct

(4m)

Noise-reduct

ion duct

Intake/Exhaust

Grill

(2m)

Unit

Spiral Duct

(6m)

Intake/Exhaust

Grill

Catalog Level

Note: (1)

The noise levels were measured at 1.5m below the intake/exhaust

grill.

(2)

The noise figures are those converted to the level in an anechoic

chamber. In real settings, the levels will be raised due to echoes

and other effects (by about 5dB).

Содержание UTZ-BD025B

Страница 1: ...DTO_ERV002E_01 2013 04 26 DESIGN TECHNICAL MANUAL UTZ BD025B UTZ BD035B UTZ BD050B UTZ BD080B UTZ BD100B ENERGY RECOVERY VENTILATORS ...

Страница 2: ...NS 2 1 UTZ BD025B 01 03 2 2 UTZ BD035B 01 05 2 3 UTZ BD050B 01 07 2 4 UTZ BD080B 01 09 2 5 UTZ BD100B 01 11 3 WIRING DIAGRAMS 3 1 UTZ BD025B 01 13 3 2 UTZ BD035B UTZ BD050B 01 13 3 3 UTZ BD080B UTZ BD100B 01 14 3 4 INTERLOCKED CONNECTION TO AIR CONDITIONER 01 15 ...

Страница 3: ...IGN PRECAUTIONS 01 22 4 4 1 CAUTION ON SAFETY 01 22 4 4 2 INSPECTION OPENING AND INSTALLATION MODELS 01 23 4 4 3 USE ENVIRONMENTS 01 24 4 4 4 HEAT EXCHANGE EFFICIENCY 01 25 4 4 5 DUST COLLECTION EFFICIENCY 01 27 4 4 6 NOISE 01 28 4 4 7 NOISE CONTROL 01 29 4 5 VENTILATION DESIGN 01 31 4 5 1 QUANTITY DYNAMIC PRESSURE STATIC PRESSURE 01 31 4 5 2 HOW TO CALCULATE REQUIRED VENTILATION VOLUME 01 32 4 6 ...

Страница 4: ...185 168 175 182 190 178 185 168 175 Air Volume m3 h 350 350 240 350 350 240 External Static Pressure Pa 140 60 45 140 60 45 Sound Pressure Level dB 32 5 33 0 30 5 31 0 22 5 25 5 32 5 33 0 30 5 31 0 22 5 25 5 Temperature Exchange Efficiency 75 75 78 Dimensions mm H x W x D Net 317 x 1050 x 804 Gross 396 x 1250 x 1000 Weight kg Net 49 Gross 57 Outlet Duct Diameter mm 150 Operation Range C 10 to 40 M...

Страница 5: ...m UTZ BD100B Power Source 220 240V 50Hz Ventilation Mode Heat Exchange Ventilation Normal Ventilation Notch Extra high High Low Extra high High Low Input W 437 464 416 432 301 311 437 464 416 432 301 311 Air Volume m3 h 1000 1000 700 1000 1000 700 External Static Pressure Pa 105 80 75 105 80 75 Sound Pressure Level dB 37 5 38 5 37 0 37 5 33 5 34 5 39 5 40 5 39 0 39 5 35 5 36 5 Temperature Exchange...

Страница 6: ...n c u r v e Dry bulb temperature C Absolite humidity kg kg C C B B A REFERENCE SKETCH Pipe Hood Outside Intake Duct Ceilling Suspension Bolts Supply Air Duct EA Exhaust Air OA OutsideintakeAir RA RoomAir SA SupplyAir Inside Supply Opening Supply Exhaust Air Grill Room Intake Opening Supply Exhaust Air Grill Room Intake Duct Heat Insulation Material Exhaust Air Duct The two outside ducts the Outsid...

Страница 7: ...Same as the indoor air conditions Indoor air here means air in air conditioned living rooms Its use in refrigerators or other places where temperature can fluctuate greatly is prohibited even if a temperature range is acceptable Example Indoor air conditions During cooling period Temperature 27 C Relative humidity 50 During heating period Temperature 20 C Relative humidity 40 The Input the current...

Страница 8: ... r v e Dry bulb temperature C Absolite humidity kg kg C C B B A REFERENCE SKETCH Pipe Hood Outside Intake Duct Ceilling Suspension Bolts Supply Air Duct EA Exhaust Air OA OutsideintakeAir RA RoomAir SA SupplyAir Inside Supply Opening Supply Exhaust Air Grill Room Intake Opening Supply Exhaust Air Grill Room Intake Duct Heat Insulation Material Exhaust Air Duct The two outside ducts the Outside Int...

Страница 9: ...uirements Same as the indoor air conditions Indoor air here means air in air conditioned living rooms Its use in refrigerators or other places where temperature can fluctuate greatly is prohibited even if a temperature range is acceptable Example Indoor air conditions During cooling period Temperature 27 C Relative humidity 50 During heating period Temperature 20 C Relative humidity 40 The Input t...

Страница 10: ... n c u r v e Dry bulb temperature C Absolite humidity kg kg C C B B A REFERENCE SKETCH Pipe Hood Outside Intake Duct Ceilling Suspension Bolts Supply Air Duct EA Exhaust Air OA OutsideintakeAir RA RoomAir SA SupplyAir Inside Supply Opening Supply Exhaust Air Grill Room Intake Opening Supply Exhaust Air Grill Room Intake Duct Heat Insulation Material Exhaust Air Duct The two outside ducts the Outsi...

Страница 11: ...me as the indoor air conditions Indoor air here means air in air conditioned living rooms Its use in refrigerators or other places where temperature can fluctuate greatly is prohibited even if a temperature range is acceptable Example Indoor air conditions During cooling period Temperature 27 C Relative humidity 50 During heating period Temperature 20 C Relative humidity 40 The Input the current a...

Страница 12: ... n c u r v e Dry bulb temperature C Absolite humidity kg kg C C B B A REFERENCE SKETCH Pipe Hood Outside Intake Duct Ceilling Suspension Bolts Supply Air Duct EA Exhaust Air OA OutsideintakeAir RA RoomAir SA SupplyAir Inside Supply Opening Supply Exhaust Air Grill Room Intake Opening Supply Exhaust Air Grill Room Intake Duct Heat Insulation Material Exhaust Air Duct The two outside ducts the Outsi...

Страница 13: ...ance Curve P Q Curve 220 240V 50Hz Efficiency Curve Temperature Enthalpy in heating Enthalpy in cooling Extra High Equivalent pipe length High Low When friction coefficient of pipe duct 0 02 100m 60 40 250 20 350 80 90 450 500 Use conditions Outdoor air conditions Temperature range 10 C 40 C Relative humidity 85 or less Indoor air conditions Temperature range 10 C 40 C Relative humidity 85 or less...

Страница 14: ...n c u r v e Dry bulb temperature C Absolite humidity kg kg C C B B A REFERENCE SKETCH Pipe Hood Outside Intake Duct Ceilling Suspension Bolts Supply Air Duct EA Exhaust Air OA OutsideintakeAir RA RoomAir SA SupplyAir Inside Supply Opening Supply Exhaust Air Grill Room Intake Opening Supply Exhaust Air Grill Room Intake Duct Heat Insulation Material Exhaust Air Duct The two outside ducts the Outsid...

Страница 15: ...istance Curve P Q Curve 220 240V 50Hz Efficiency Curve Temperature Enthalpy in heating Enthalpy in cooling Extra High Equivalent pipe length High Low When friction coefficient of pipe duct 0 02 100m 60 40 250 20 350 80 90 500 450 Use conditions Outdoor air conditions Temperature range 10 C 40 C Relative humidity 85 or less Indoor air conditions Temperature range 10 C 40 C Relative humidity 85 or l...

Страница 16: ...tion of each switch refer to Page 7 of the Owner s manual Air Flow Switch 3 High 1 Low Operation Switch 3 ON 1 OFF UTZ BD025B 3 2 UTZ BD035B UTZ BD050B SW1 Switch Low Damper High Power Source 220 240V single phase 50Hz Power Source Line Power Source Neutral Second main body High Main unit L N SW1 SW2 Common Low Damper Terminal board Grey White White Blue Black Black Red Red White Black Brown Blue ...

Страница 17: ...w Blue Supply Air Fan Connector Connector White White Extra high White Black Black Capacitor Yellow Red Blue High Orange Orange Red Yellow Blue Exhaust Air Fan Yellow Yellow White White Black Black Blue Blue Connector Connector Micro switch Damper Motor Power Source Line Power Source Neutral High Main unit L N SW1 SW2 Common Low Damper Terminal board Grey White White Blue Black Black Red Red White...

Страница 18: ... power source The type is different depending on the model The allowable voltage current of the external output circuit from the air conditioner varies depending on the model Check it with the air conditioner technical manual Do not connect the energy recovery ventilator power source AC220 240V to the external output terminals from the air conditioner Regarding the relay circuit select the necessa...

Страница 19: ...he air conditioner is in the stopped state Do not make connections to multiple indoor units by duct direct connection system Dust may be dispersed depending on the operation condition of the air conditioner Energy recovery ventilator Dust Room air Room air Stopped External air Operating Power source AC220 240V 50Hz Energy recovery ventilator terminal Indoor unit PC board Relay circuit Provided at ...

Страница 20: ...eat exchange element By adopting nonwoven fabric filter with excellent dust collection efficiency and improving the air course shapes a long life heat exchange system has been realized which does not require regular cleaning of the heat exchange element cross flow element After cleaning the cross flow element The counter flow element Heat exchange element with extended life The cross flow element ...

Страница 21: ...MOUNTED INTERNAL STRUCTURE HEAT EXCHANGE VENTILATION Bypass air course Heat exchange element Filter for RA Filter for OA HEAT EXCHANGE UNIT CEILING MOUNTED INTERNAL STRUCTURE NORMAL VENTILATION Bypass air course Heat exchange element Filter for RA Filter for OA ...

Страница 22: ...ATTENTION When the heating function is on during winter do no use normal ventilation The dew condensation will take place in the unit which may result in stains on the ceiling etc Stale indoor air to be ex hausted EA Fresh external air to be supplied indoors SA Outdoor Indoor Total heat exchanger Stale indoor air RA Fresh external air OA Fresh external air to be supplied indoors SA Stale indoor ai...

Страница 23: ...ion air conditioning engineering standards αA 0 68V S αA in the case of Pmax 10Pa αA 0 39V S αA in the case of Pmax 30Pa αA Effective opening area cm2 of dedicated inlets V Effective ventilation air volume m3 h S Gross floor area of a building m2 αA Air tightness of a building cm2 m2 A ventilating fan has an exhaust capability specified in the catalog for which however the amount of air exhausted ...

Страница 24: ... air Exter nal air Positive pressure Exhaust outlet Indoor Ventilating fan Indoor Fig 3 3 Negative pressure Air supply inlet Ventilating fan Fig 3 4 To be applied for clean rooms and cooling machinery etc To be applied for kitchens toilets rooms where hot water heaters can be utilized in residences and copying rooms etc Class 1 Ventilation Method Exhaust Mechanical exhaust Air supply Mechanical ai...

Страница 25: ...be present e g acidic alkali or ganic solvent paint gasses etc from machinery or chemical plants etc Installation in such a location could cause a gas poisoning and a fire Carry out GND work Never connect the GND wire to a gas pipe a water supply pipe a lightning conductor or a GND line of a telephone c An incomplete GND wire likely to cause an electric shock et is If the unit is accompanied by wa...

Страница 26: ...ilter once or twice a year If not cleaned they are likely to get clogged resulting in deteriorated performance Installation Model Inspection Opening Exhaust Air Outside Air Room Air Supply Air Inspection Opening 450 For Filter Heat Exchange Element Motor Damper Inside Supply Opening Ceiling Suspension Bold Pipe Hood Supply Air Duct Outside Intake Duct Supply Air Room Intake Duct Room Intake Openin...

Страница 27: ...e occasions As the emergence of insects may depend on various natural conditions we recommend users to apply medium performance filters to be purchased separately in environments where there are many insects or where insects are likely to swarm as the exhaust intake openings are close to street lamps etc In addition it is also recommended that the unit should be turned off in the Heat Exchange Ven...

Страница 28: ...t If the temperature and humidity of the internal air and external air are determined and if the exchange efficiency of the heat exchange ventilating unit to be utilized is determined air conditions of the air supplied indoors and exhausted outdoors after passing through the heat exchange unit can be calculated in the following formula Intake Side Temperature Internal Supply Air Temperature C Exte...

Страница 29: ...heat exchange In the case of sensible heat exchange ventilation the recovered calorie can be calculated in the following formula Recovered Sensible Heat Calorie qT w Air Specific Gravity 1 2 kg m3 in the normal condition x Process Airflow m3 h x Isobaric Specific Heat of Dry Air 1 006 kJ kg C x External Air Temperature C Internal Air Temperature C x Sensible Heat Exchange Efficiency x 0 28 w h kJ ...

Страница 30: ...erformance The measuring methods for dust collection efficiencies are divided into JIS colorimetric method NBS colorimetric method counting method DOP method and mass ratio method AFI High values recorded in the mass ratio method may be lowered when converted in the colorimetric method Please refer to the indication of the measuring method Please refer to the correlation graph below for different ...

Страница 31: ...tances in anechoic chambers as specified in JIS etc The following points should be considered in selecting proper products 1 Changeable due to environmental conditions The measured values were determined in anechoic chambers In real settings echoes will take place from walls floors ceilings etc The measurements may also increase due to the materials used and the surrounding space It is thus necess...

Страница 32: ...ers should be used EFFECTS OF NOISE CONTROL MEASURES Points 1 The noise reduction duct not less than 2m should always be used at the exit of the unit on the internal supply side 2 Spiral ducts galvanized steel tubes and aluminum flexible ducts should not be connected to the unit exit opening General Comparison of Effects 1 Great Effects 4 Small Effects 1 Noise reduction duct installed for 6m 2 Noi...

Страница 33: ...ly Particularly the bending immediately after the exit opening of the unit body 3 Do not make unnecessary openings on the ceilings 4 Do not suspend the unit under members with insufficient strength 2 The following control measures may be taken 1 Ceiling materials should be of high sound insulation quality with large transmission losses Note Specifically low frequency noises cannot be significantly...

Страница 34: ... follows V Flow velocity m sec g Gravity acceleration m sec2 Specific weight of air kg m3 HOW TO INTERPRET STATIC PRESSURE QUANTITY CHARACTERISTIC CURVE P Q CURVE A graphic presentation of the relationship between the quantity and the static pressure of a ventilating fan is referred to as P Q Curve which can indicate the performance of the fan Fig 6 2 illustrate a case in which a small intake open...

Страница 35: ...ON THE NUMBER OF VENTILATION OPERATIONS REQUIRED FOR A ROOM Required Ventilation Volume m3 h Number of Ventilation Operations Required in an Hour times h x Cubic Capacity of Room m3 The ventilation volume can be determined by calculating the cubic capacity of the room and using the number of ventilation operations indicated in Table 6 2 Example Location Bathroom Required Number of Ventilation Oper...

Страница 36: ...haracteristic Curve Fig 7 1 CALCULATION BASED ON EQUAL PRESSURE METHOD 1 Circular Duct 1 Duct resistance can be calculated from the following formula To determine the pressure loss caused in air flowing through a straight duct ΔP the following formula is generally used Duct Resistance ΔP Pa Friction Coefficient of Duct 0 01 0 25 g Gravitational Acceleration 9 8m sec2 Air Density kg m3 1 20kg m3 L ...

Страница 37: ...bend with rectangular cross section 0 5 1 30 72d 0 75 0 52 29d 1 0 0 25 14d 1 5 0 20 11d 1 0 5 1 20 67d 0 75 0 44 24d 1 0 0 21 12d 1 5 0 17 9d CALCULATION IN SIMPLIFIED METHOD A case in which a model is selected based on straight pipe corresponding length and airflow quantity A model is selected based on the following conditions Required ventilation quantity 120 m3 h Duct system Fig 7 5 60Hz Examp...

Страница 38: ...l Please refer to the electric facility engineering standards and the internal regulations Heat Insulation Material to insulate the Adapter and Aluminum Tape Outside Intake Duct Exhaust Air Duct Gradient Aluminum Tape Aluminum Tape Fig 3 Ceiling Suspen sion Bolt Ceiling Suspen sion Bolt Nut Washer Ceiling Suspension Fixture Washer Nut Fig 1 Anti Vibration Ceiling Suspension Fixture Unit Body Fig 2...

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