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Constant Air Volume (CAV)


Description

AV-400 Series Pressure Independent Type CAV:

The AV-300 Series terminal units are among the most versatile single duct air control products on the market, providing easy HVAC system integration with diverse control packages. The AV-300/400 Series unit comes standard in several different configurations.

  • AV-300 - Pressure Independent Variable Air Volume Unit

  • AV-310 - Pressure Independent Variable Air Volume Unit with Sound Attenuator

  • AV-320 - Pressure Independent Variable Air Volume Unit with Electric Reheat

  • AV-330 - Retrofit type Variable Air Volume Unit

  • AV-400 - Pressure Independent Constant Air Volume Unit

  • AV-410 - Pressure Independent Constant Air Volume Unit with Sound Attenuator

  • AV-420 - Pressure Independent Constant Air Volume Unit with Electric Reheat

  • AV-430 - Retrofit type Constant Air Volume Unit

    The compact design simplifies the building layout process for virtually any application. The efficient and reliable AV-300 Series unit is available with analog or direct digital control options.

    AV-300/400 Series Typical Application:

    Prime AV-300/400 Series single duct terminal units are designed to be easily incorporated in the overall building HVAC design. Control packages allow the AV-300 Series to be used in variable volume applications. Although designed for compatibility with low pressure (<0.10"Ps), the AV-300/400 Series unit performs reliably in high pressure systems as well (up to 6.0" Ps). See the Engineering section for more information.

    In variable volume pressure independent applications, the AV-300 Series unit compensates for system pressure, while adjusting the airflow in response to room thermostat demand. When used in a constant volume application, the AV-400 can maintain a set flow requirement, compensating for fluctuations in system pressure.

    Interior zones are typically controlled by an AV-300/400 Series with a cooling-only control package; exterior zones are often controlled by an AV-300/400 Series with electric reheat coils and a reheat control package.

    Depending on the layout of the duct work, it is sometimes more practical to specify the AV-300/400 Series with a single, factory-installed round discharge or with multiple round outlets.


    Features:

  • 22 Gage Galvanized steel casing construction with a 20 gage casing option that provides strength and product durability.

  • AHRI listings for certified performance in accordance with AHRI Standard 880 testing standard.

  • Suitable for low, medium, or high pressure applications; able to operate throughout a wide range of HVAC systems.

  • Available 6"x9" access opening for easy accessibility during routine inspections and maintenance.

  • Several casing liner options provide quiet and clean operation.

  • Airflow capacities from 40 to 3660 CFM providing airflow control for most commercial applications.

  • Round inlet sizes from 4" through 16" diameter which are slightly undersized to fit standard spiral and flex duct.

  • Digital, or analog controls with pressure independent or dependent control packages allow tailoring to many building systems.

  • K4 Line across four quadrant, multi-point center averaging sensor or optional linear, multiple-point, averaging velocity sensor, offers low resistance to airflow while providing amplified velocity pressure signal to the controller.

  • Gasketed round volume control damper operates over a full 90° range and provides a low leakage shutoff position.

  • Compact unit casing sizes accommodates installation in reduced ceiling plenum space.


    PRESSURE INDEPENDENT CAV STANDARD UNIT Model: AV- 400

    Constructional Details:

  • Casing 0.9/1.0 mm (20 gauge) thick Galvanized Steel Sheet.

  • Blade: 1.2mm (18 gauge) thick Galvanized Steel Sheet.

  • Round Shaft Bar of 12mm Ø Galvanized Steel.

  • Internal Acoustic Insulation of 12mm thick acoustic foam liner with 28 kg/m3

  • Differential Pressure Grid made of Aluminium is fixed at the Inlet Side of CAV.

  • All CAV's are mechanically sealed and gasketed for air tight construction.

  • Modulating Type of Actuators, with 24Vac operating voltage will be installed with Digital Thermostat as a standard supply.

  • DDC, BMS & Bacnet compactable controls will be supply upon client's request and optional.

  • DDC, BMS & Bacnet compactable controls will be supply upon client's request and optional.



    INDEPENDENT CAV UNIT WITH SOUND ATTENUATOR Model: AV-410

    Constructional Details:

  • Casing 0.9/1.0 mm (20 gauge) thick Galvanized Steel Sheet.

  • Blade: 1.2mm (18 gauge) thick Galvanized Steel Sheet.

  • Round Shaft Bar of 12mm Ø Galvanized Steel.

  • Internal Acoustic Insulation of 12mm thick acoustic foam liner with 28 kg/m3

  • Differential Pressure Grid made of Aluminium is fixed at the Inlet Side of CAV.

  • All CAV's are mechanically sealed and gasketed for air tight construction.

  • Modulating Type of Actuators, with 24Vac operating voltage will be installed with Digital Thermostat as a standard supply.

  • DDC, BMS & Bacnet compactable controls will be supply upon client's request and optional.

  • Extended length of Sound Attenuator's will be supplied on client's request for more sound absorption and optional.

  • Double skin wall with perforated sheet construction will be supply upon client's request and optional.

  • All Variable Air Volume are internally lined, sealed and manufactured as per international standards and confirmed to NFPA 90 A and UL 181 standards for erosion.



    Pressure Independent CAV Unit with Electric Heater Model: AV-420

    Constructional Details:

  • Casing 0.9/1.0 mm (20 gauge) thick Galvanized Steel Sheet.

  • Blade: 1.2mm (18 gauge) thick Galvanized Steel Sheet.

  • Round Shaft Bar of 12mm Ø Galvanized Steel.

  • Internal Acoustic Insulation of 12mm thick acoustic foam liner with 28 kg/m3

  • Differential Pressure Grid made of Aluminium is fixed at the Inlet Side of CAV.

  • All CAV's are mechanically sealed and gasketed for air tight construction.

  • Modulating Type of Actuators, with 24Vac operating voltage will be installed with Digital Thermostat as a standard supply.

  • DDC, BMS & Bacnet compactable controls will be supply upon client's request and optional.

  • Fin tubular or open coil type electrical heater will be provided.

  • On/Off type heater will be standard construction, modulating type (SCR) will be provided subjected to the request.

  • Extended length of Sound Attenuator's will be supplied on client's request for more sound absorption and optional.

  • Double skin wall with perforated sheet construction will be supply upon client's request and optional.

  • All Variable Air Volume are internally lined, sealed and manufactured as per international standards and confirmed to NFPA 90 A and UL 181 standards for erosion.



    Retrofit Type CAV Units:

    Model: AV-430

    The Prime retrofit unit is ideal for converting a mechanical terminal unit into a CAV terminal unit. Designed to retrofit Variable / constant volume units, AV-330/430 retrofit product offers compatible controls for most building automation systems and installation convenience.

    With prime Retrofit CAV terminals in place, building owners can make use of a variety of fan volume control options.

    A major concern when retrofitting is downtime. Since the AV-330/430 terminal unit is compact and can be installed through the ceiling grid, installation costs and downtime are reduced.

    Features:

  • 1. 22 Gage galvanized steel casing construction with an optional 20 gage or (304 / 316) stainless steel casing.

  • 2. Suitable for low, medium, or high pressure application with the ability to operate throughout a wide range of HVAC systems.

  • 3. Airflow capacities ranging from 40 to 3660 CFM to provide airflow control for most commercial applications.

  • 4. Differential Pressure Grid made of Aluminium is fixed at the Inlet Side of CAV.

  • 5. Modulating Type of Actuators, with 24Vac operating voltage will be installed with Digital Thermostat as a standard supply.

  • 6. Round inlet and outlet sizes ranging from 100mm (4") to 400mm (16") diameter; slightly undersized to fit standard spiral and flex duct.

  • 7. Cast position indicator on damper shaft for easy monitoring of damper position.

  • 8. Bearings are self-lubricating; unaffected by temperature and humidity.




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