Diffuser
VAV Diffuser
Standard Model: VAV-DF
The VAV Diffuser is modulating type electronically controlled variable air volume diffuser which is used to vary the supply air volume from a wall-mounted thermostat in comfort system. The diffuser effectively regulates the amount of supply air into the space and uses a wall-mounted thermostat to achieve true VAV control in heating and cooling modes. Operating principle of diffuser enables the user to choose their desired comfort level.
Product Description
The VAV Diffuser is modulating type electronically controlled variable air volume diffuser which is used to vary the supply air volume from a wall-mounted thermostat in comfort system. The diffuser effectively regulates the amount of supply air into the space and uses a wall-mounted thermostat to achieve true VAV control in heating and cooling modes. Operating principle of diffuser enables the user to choose their desired comfort level.
Operating Principle
VAV Diffusers incorporate an internal modulating disk that continually regulates the volume of supply air in response to a wallmounted thermostat. The VAV diffuser is designed to maintain coanda effect (draft free) of discharge air along the ceiling, providing a sustained velocity throughout the volume range. Operating the diffuser from an individual wall-mounted thermostat enables users to choose their own desired comfort control from desk top level, rather than a stratified ceiling level.
Construction
VAV Diffusers shall be square with a formed backpan and a flat face panel. The diffuser shall have the same appearance from the face regardless of the inlet size. The diffuser shall include an integral modulating disk that continually regulates the volume of supply air in response to the wall mounted thermostat. Diffusers dependent on integral air induction ceiling located sensors or set point adjustment methods other than from wall mounted thermostats shall not be acceptable.
The removable face plaque attached to a unitary stamped seamless backpan. To ensure limited control of temperature by modulation, the electric 24Vac actuators shall be a drive-open drive-closed motor on the electrically driven units. Actuators that incorporate an expanding material which only drives the unit open when subjected to heat-causing electrical current, requiring a spring return mechanism to force the diffuser to a closed position shall not be acceptable. Electronic modulating wall-mounted thermostatic control shall be either a 2 to 10Vdc or floating-point.
Applications
● Architecturally preferred diffuser appearance with out sacrificing performance.
● Independent VAV zone control – easily retrofit existing, problematic multi-zone systems.
● Eliminates comfort complaints associated with multi-zone applications due to non-uniform loading and lack of personal comfort control.
● For surface mounting or use with suspended grid systems.
Features / Advantages
● Increases comfort levels in individual zones without cycling equipment.
● Four-way discharge pattern.
● Fully-modulating diffuser.
● Powerful, low voltage floating-point actuator.
● True variable air volume in heating and cooling modes.
● Wall-mounted thermostatic control within an individual zone.
● Adjustable minimum and maximum air flows.
● Suitable for lay-in ceilings