One Sightsolutions OSS-VAV Series 2021-03-08T09:26:06+00:00

OSS-VAV Series

One Sightsolutions

The OSS-VAV Series is a combination controller and digital room sensor with support for networked communications via the BACnet MS/TP or Modbus protocol.


The OSS-VAV Series controller is compatible with both TRL24 and TDU series digital room sensors. The Networkable VAV Controller is designed for simple and accurate control of any variable air volume box in a number of zone control configurations. Its field configurable algorithms enable versatile implementation of required control sequences.


• Field configured VAV algorithms, inputs and outputs
• Built-in actuator, 70 lb-in
• On board differential pressure sensor (select models)
• Select direction on analog outputs
• Simple air balancing and commissioning via digital room sensor
• Automatically sets operation mode to pressure dependent or independent based on the presence of air flow
• Configurable PI (Proportional-Integral) function
• Independent, configurable proportional control band and dead band per ramp
• Selectable internal or external temperature sensor (10KΩ)
• Activate output with CO2 sensor from TRL/TDU or external sensor input
• Changeover by contact or external temperature sensor
• Internal and external temperature sensor calibration
• Optional potentiometer feedback for increased precision of actuator position
• Freeze protection
• Removable, raising clamp, non-strip terminals


• Single duct, cooling only
• Single duct cooling and/or heating
• Up to 4 stage reheat and/or cool
• Up to 4 On/Off heat and/or cool
• Up to 4 time proportioned (TPM) heat or reheat
• Up to 2 analog (0-10Vdc) reheat and/or cool
• Up to 2 floating heat and/or cool
• Pressure dependent or pressure independent
• With or without auto changeover
• Supply/exhaust (requires an additional EVC)

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Holler Box