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The QVR20 Series Modbus Controllers have been designed for pressure independent and pressure dependent VAV control.  The controllers can measure the flow across the VAV box and control it's position to the required flow setpoint. The flow (setpoint) is adjusted by the temperature control loop providing accurate temperature control. The QVR20 controllers have also built-in CO2 measurement allowing the air flow being increased based on the air quality requirements.
 
The QVR20 Series Modbus VAV controllers can have additional VOC (Volatile Organic Compounds), Relative Humidity or PIR Occupancy sensors. Additional VOC, dehumidity/humidity control loops expand the multi-functional controller further. 
 
With the TS-Option the room controllers are supplied with an attractive colour touchscreen display with glass front that provides intuitive user interface. The display colour scheme can be tailored using different skin colours. The controllers are mounted on the wall surface directly or to standard wall mounting boxes. The controllers have built-in Modbus RS485 communication that allow interaction to the BMS systems (Building Management Systems). Optional Bluetooth wireless interface provides connection to Smart Phone App interface (iOS).
 
The QVR20 Modbus VAV controllers can be configured using Windows Device Configuration Tool (connected wirelessly using Bluetooth) or from SmartConfig iOS app. The QVR20 controllers are available in white and black (in addition to the touchscreen colour skins). For ease of commissioning the controller address can be set from the bit switch or from the touchscreen.
Technical
Measurements
  • Temperature and CO2 (Carbon Dioxide)
Optional Measurements
  • Relative Humidity (-RH Option)
  • Relative Humidity and VOC Volatile Organic Compounds (-RH-VOC Option)
  • Movement / Occupancy (-OE Option)
Control Functions
  • 4-Stage Temperature Control Loop (4 x Cooling, 4 x Heating)
  • Flow Control PI Loop for the VAV Damper
  • Pressure Independent VAV Control
  • Pressure Dependent VAV Control
  • CO2 PI Control Loop
  • Humidify / De-Humidify PI Control Loop
  • VOC Air Quality PI Control Loop
  • EC Fan Control
  • Dew Point Control 
  • Condensation Control
  • Maximum Demand (e.g. Cooling and VOC for VAV)
  • Extension Timer / Boost Control
  • 0-10V Modulating and 6-Way Valve Control
  • Damper Control
Communication Protocol

Modbus Communication Protocol, RS485 Over-Voltage Protected
Power Supply

24Vac/dc
Universal Inputs

1 x Flow Input 0-10Vdc (m3/h, l/s, cfm)

1 x Universal Input (NTC10, 0-10V, Digital Volt-Free)
Analogue Outputs 4 x Analogue 0-10Vdc Outputs, Max 2mA
Digital Outputs Optional 1 x 24V Relay Output (-RL Option) 

QVR20-MOD Modbus VAV Controller with CO2, 1FLOW, 1UI, 4AO, (1RO)

  • Product Code: QVR20-MOD
  • SKU: 6100 1
  • Availability: 2-3 Days

  • £235.00

Available Options


Tags: modbus, co2, temperature, VOC, VAV controller