Vav Box Control System

Because the supply air temperature in this simplest of vav systems is constant the air flow rate must vary.

Vav box control system. Each zone is served by at least one vav box or more accurately a vav terminal. A vav box is integral to the ductwork connecting primary ductwork to secondary ductwork. Prolon is an hvac control system entirely designed for retrofits as well as new buildings and can be easily implemented in small to medium sized commercial buildings. As vav terminals open the static pressure in the supply duct decreases and the blower increases air volume to maintain the static.

The terminal is controlled by a temperature generally the bas system to open and close to provide more or less air to the zone. Single duct vav boxes. In many cases a variable air volume box is nothing but an assembly of a sheet metal box with a damper and controls inside a control panel. There are many vav systems out there set up in different ways.

In a vav system an air handling unit ahu cools or. With the ability to run the system on part load when not in use or to have a higher level of independent room control the vav box are used in a variety of locations including retail stores auditoriums office. This terminal unit is at the core of today s variable air volume vav systems. The primary function of daikin s single duct terminal unit is to regulate conditioned air flow into an occupied zone in response to a control signal.

The simplest vav system incorporates one supply duct that when in cooling mode distributes approximately 55 f 13 c supply air. Historically pneumatic control was commonplace but electronic direct digital control systems are popular especially for mid to large size applications. Variable air volume systems variable air volume vav systems are the best way to zone especially in large buildings. The system has a large air handling unit and multiple vav boxes allowing a far greater degree of control than a simpler system.

Necc offers variable air volume controls vav boxes vav terminal units and controllers from nailor kmc kreuter johnson controls. A variable air volume vav box is a part of an hvac system in commercial buildings. What distinguishes a variable air volume system from other types of air delivery systems is the use of a variable air volume box in the ductwork. Prolon system hvac control system.

The most basic vav box consists of an enclosure with a small air valve damper that regulates the air flow in response to the room s thermostat. The controllers are designed to monitor and control mechanical equipment such as packaged rooftop units split systems air handlers vav vvt zoning systems heatpumps boilers pumps vfd s. Variable air volume vav is a type of heating ventilating and or air conditioning hvac system.