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Lindab Pascal - Simplified VAV solution with full potential. Constant pressure solution. Solution based on constant pressure regulation Active diffusers with built-in damper plate, which is controlled by a room regulator with 0-10V signal

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Lindab Pascal

- Simplified VAV solution with full potential...

  • Solution based on constant pressure regulation

  • Active diffusers with built-in damper plate, which is controlled by a room regulator with 0-10V signal

  • Exhaust air flow regulation by measuring airflow in supply duct

  • Pressure regulation in supply distribution duct

  • Exhaust balance with flow measurement – master/slave function

  • Measuring unit has a minimum flow rate limit

  • Measuring unit requires straight duct before the unit

  • Addition of several supply to control one exhaust is difficult

  • FRU/VRU settings must be done special from factory

  • Extra components for flow measurement

  • Active diffusers

  • Diffusers with high impulse even at low airflows

  • Diffuser settings must be done individually from factory

  • Not possible to put on stock

  • Labelling with ID must be done for each room

  • Airflow settings are based on theoretical calculated pressure (no airflow regulation)

    • Correct pressure = correct airflow

    • Higher pressure = higher airflow

    • Lower pressure = lower airflow

  • Pressure regulation

  • Areas with constant flow balanced with simple balancing damper

  • Limited pressure allowance in diffuser

  • Size of pressure zone not to big

  • Difficult keeping constant pressure in all parts of a zone

  • High demand on duct design

  • Limited flexibility when reconstructed

  • Exact placement of pressure sensor

  • Higher energy consumption due to higher minimum pressure

  • Fan optimizer only on zone dampers

  • Extra components for pressure regulation


  • Our vision is:

  • Install a standard VAV system with room temperature regulation

  • Make settings of air flow in room regulator

  • Indicate which supply diffusers that affects the exhaust damper

  • This is done by:

  • Installing a motorized plenum box that can handle high pressure with low sound

  • Installing a suitable diffuser that can handle 0-100% airflow without the risk of draft

  • Making sure the pressure in the system is not exceeding 200 Pa

  • Measuring actual air flow regardless of pressure

  • Setting all parameters in displays on Regula units

  • Total air flow for supply diffusers is being added up and exhaust air flow is regulated

  • The fan uses only necessary pressure for each diffuser

  • Active diffusers

  • Constant pressure

  • Measuring for exhaust

  • Pascal

  • Active boxes

  • Variable pressure

  • Calculation for exhaust

Pascal components

  • Diffusers

  • Suitable diffusers for 0-100% airflow

    • LCP

    • LKP

    • LCC

  • Diffusers with integrated presence sensor for Demand control

    • LCP-P

    • LKP-P

    • LCC-P

  • No draft risk with suitable diffuser

Pascal components

  • MBBV

  • Standard MBB box with integrated actuator

  • Volume flow regulation with flow measurement in box

    • Correct airflow independent of pressure

    • No minimum limit – can regulate 0-100%

    • Can handle up to 200 Pa with low sound level

    • Characteristic curves pre-programmed for each size

    • Translates a voltage to an airflow

    • Indicates damper position by a voltage signal

    • Demounting of damper is possible

    • 7 sizes available

    • MBBV is delivered with 0-100% settings

    • (never set actual airflows in MBBV, since Regula Combi

    • will adjust the signal according to flow)

    • Regula Connect VAV integrated

    • Plugin play solution for easy wiring

Pascal components

  • VRU-2

  • With new sensor technology from Belimo

  • Used for regulation of exhaust air

  • Controlled by Regula Combi with special exhaust program

  • Indicates damper position to Regula Combi

  • Can be used for supply as alternative to MBBV boxes, typically used in rooms with multiple diffusers

  • Requires straight duct in front the unit

  • Requires silencer after the unit

  • In a Pascal system VRU is delivered with 0-100% settings

  • (never set airflows in VRU, since Regula Combi will adjust the signal according to flow)

Pascal components

  • Regula Combi

  • Special designed VAV program (program 6)

  • Special designed exhaust program (program 7)

  • Display and pushbuttons

  • Exoline communication

  • Flexible setup – adjustable parameters

  • Regulation of temperature in sequence; heating and cooling

  • Output signal for flow 2-10 V – 0 V closes damper

  • CO2 overrules temperature regulation resulting in higher airflows

  • Air volumes for standby (unoccupied), min. occupied and max occupied can be set

  • Transforms damper position to Exoline communication

  • Transforms exhaust damper signal from Exoline to 2-10 V (exhaust program)

  • All settings can be done with REGIO Tool

Pascal components

  • Regula Master

  • Standard hardware from Regin – known in the market

  • Special designed software for Pascal

  • One standard unit with three modes

    • Single Regula Master (SRM)

    • Local Regula Master (LRM)

    • Global Regula Master (GRM)

  • Three basic functions in the system

    • Exhaust control

      • Summary of supply air volumes which affect the exhaust damper

      • Summary of constant flows which affect the exhaust damper

      • Factor for more/less exhaust than supply

    • Fan optimizer

      • Secures that the most open damper is open to 85%. If the damper is more open, accelerate the fan – if less slow down

    • Operating control

      • Monitors damper behavior in the system

      • Gives alert if a damper does not move over time

  • All communication between Regula units with Exoline

  • Communication to overall BMS via Exoline or via an OPC solution (BMS contractor)

Pascal overview

  • Volume flow regulation / variable pressure system

  • Suitable diffusers 0-100%

  • Room regulation with special programs

  • Demand control

  • Exhaust control

  • Fan optimizer – on room level

  • Operating control

  • Exoline communication

  • Plug n’ play with Regula Connect

VAV study

  • Rehva Journal article October 2011 from Oslo University

  • Problem: Energy consumption for fans in VAV systems

  • Solution 1 – standard pressure controlled system

  • Solution 2 – fan optimizer on zone dampers

  • Solution 3 – fan optimizer on room dampers/boxes

Exhaust strategy

  • Central regulation and exhaust diffuser in rooms

  • Central regulation and overpressure valve in rooms

  • Room balanced exhaust with parallel signal

  • Room balanced with exhaust control in each room

Project Phases Pascal

  • Designing

  • No special demands for duct design

  • No pressure zones

  • Few standard components

  • Easy selection of components

  • Total system unchanged when redesigning one part

  • High accuracy in flow and sound

  • Simple and safe

  • Installing

  • Few components

  • Less dampers in the system

  • No pressure regulation

  • Components from stock

  • Easy wiring standardized with Regula Connect

  • No labelling with room ID needed

  • Configuration to be done after installation

  • Commissioning

  • Adjustable parameters

  • Technical manual with step-by-step guide available

  • Settings can be done directly in displays in Regula Combi and Regula Master

  • Possibility to use Regio Tool

  • No IT expertise needed

  • Can be done by installer

  • Operating

  • Operating control

  • Fan optimizer on room level

  • Demand control – with 3 airflows for energy saving

  • Easy maintenance with supply access points from diffuser

  • Flexible for future changes

  • Additional diffusers – no need for re-balancing

  • New room set-up can easily be configurated


  • Simple Design

  • Variable pressure system

  • Plenum box with flow regulation to secure correct airflow

  • No need for pressure regulation in duct system

  • No need of dampers between fan and diffuser

  • No special demands for duct design

  • Flexible system layout

  • No need for zoning

  • Plenum box with low sound even at high pressure

  • Flexible diffusers that handles 0-100% airflow

  • Can handle low airflows with new D3 sensor technology

  • No need for airflow measurement for exhaust control

  • Extra diffusers can be added without re-balancing

  • Change of room set-up can be easily be done

    • Easy Construction

  • Standard installation

  • Few standard components

  • Less dampers and silencers

  • No settings from factory

  • No need for ID labeling products for each room

  • Available from stock

  • Plug n´Play wiring with Regula Connect

  • All configuration to be done after installation

  • Easy commissioning

  • No balancing, only configuration

  • Configuration can be done by installer

  • Special Pascal programs in Regula Combi

  • Adjustable parameters

  • Simple addition of supply to control exhaust

  • All configuration can be done directly in Regula units or Regio Tool

  • Exoline is an open Protocol

  • Step-by-step guide available

  • Communication with overall BMS is possible

    • Low Energy consumption

  • Low fan pressure

  • Lower pressure drop due to variable airflows

  • Fan optimizer to secure only necessary fan pressure

  • Fan optimizer on room level

  • Low pressure drop in MBBV box

  • Demand control

  • Integrated presence sensor in diffuser

  • Low standby airflow at non-occupancy in room

  • CO2 control possible

  • Lower airflows means lower energy consumption for cooling

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