Three-quarter view of a single-duct VAV reheat terminal unit

Системы распределения воздуха в чистых помещениях

Однопроводный терминальный блок перегрева VAV

A pressure-independent single-duct terminal that meters primary air and reheats the minimum airflow before discharge to a perimeter or process-support zone.

Pressure-Independent VAV Control
Integral Hot-Water or Electric Reheat
Averaging Inlet Flow Sensor
Acoustically Lined Casing

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Введение продукции

The single-duct VAV reheat terminal unit combines a round primary-air inlet, averaging flow sensor, modulating damper and rectangular discharge casing with an integral heating section. During cooling demand, the controller varies primary airflow between programmed minimum and maximum values. When the zone requires heat, airflow is held at the heating minimum while a hot-water valve or staged electric heater raises the discharge temperature. An acoustic liner and optional attenuator control regenerated noise, while coil access panels support inspection of the downstream heating section.

Основные характеристики

An averaging inlet sensor and matched controller maintain primary airflow as duct static pressure changes.

Hot-water or electric reheat adds sensible heat downstream of the control damper without a terminal fan.

Programmed cooling, ventilation and heating minimums allow airflow to follow the zone operating sequence.

Acoustic lining and optional discharge attenuator reduce radiated and air-path noise above occupied spaces.

Обеспокоенность клиентов продуктами

A reheat terminal must preserve required ventilation airflow, prevent discharge overheating, control noise and keep the heating coil and controller accessible above the ceiling.

Reducing cooling airflow below the ventilation minimum compromises room air exchange.Separate programmed cooling and occupied minimums keep primary air above the required ventilation quantity.

Reheat energizes at too little airflow and produces excessive discharge temperature.Airflow proof and a defined heating minimum enable the coil or heater only when sufficient air passes through the box.

High inlet static pressure produces objectionable regenerated noise over the room.Correct inlet sizing, duct-pressure reset and acoustic attenuation limit velocity and throttling sound.

A leaking water coil valve causes simultaneous cooling and heating energy waste.A tight-closing modulating valve and discharge-air temperature monitoring expose unintended heat input.

Типичные приложения

Cleanroom perimeter support zonesLaboratory offices and write-up roomsHospital patient and support spacesPharmaceutical corridors and gowning roomsCommercial zones with central cool air

Технические параметры

Representative casing construction ranges for a single-duct VAV terminal with integral reheat are shown below.

Основной материал	32–48 kg/m³ mineral-fiber acoustic liner behind galvanized casing with copper-tube aluminum-fin reheat coil
Толщина панели	13–25 mm internal acoustic liner
эффективная ширина	300–1000 mm nominal terminal casing width
Максимальная длина	Up to 1800 mm combined terminal, attenuator and reheat-section length
Толщина линий стали	0.7–1.0 mm galvanized casing and access panels
Плотность ядра	32–48 kg/m³ mineral-fiber acoustic lining
Теплопроводимость	Approximately 0.035–0.045 W/(m·K) for the acoustic liner
Поверхностная отделка	Mill-galvanized casing with cleanable liner facing and corrosion-protected coil frame
Объединенный тип	Round inlet to rectangular lined casing with integral sensor, damper and flanged downstream reheat section
Customization	Доступно в зависимости от предполагаемого применения и операционной среды.

Доступные варианты

One- to four-row hot-water reheat coilStaged or proportional electric heaterIntegral discharge attenuatorFactory-mounted DDC controller and valve package

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