VAV
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Product overview / symbols Ceiling diffusers Ceiling diffusers - visible Plenum boxes Wall diffusers Displacement diffusers Constant- / variable flow dampers Fresh air valves/overflow units Cleanroom diffusers © 02.2013 Lindab Ventilation A/S. All forms of copying without written permission are forbidden. is Lindab AB’s registered trademark. Lindab’s products, systems and product group and product designations are protected by intellectual property rights (IPR).

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Optimized usage Ventilation makes up considerable part of energy costs in the daily usage of the building. At the same time authorities have several requirements concerning how much energy is to be spent on ventilation. In pretty much all types of systems, it consequently makes good sense to use some sort of VAV, making it possible to reduce the air volume depending on the need in each individual room. The reduction of air volume in connection with transport of the air, in addition to the energy needed to cool/heat the outer air, will reduce costs. Besides saving money on the energy, it...

Pressure regulation VAV is short for ”Variable Air Volume”. VAV is a demandcontrolled ventilation, to be used when the loads in a building vary. In rooms with changing numbers of people, a more satisfactory air quality can be ensured by regulating the air flow in relation to CO2 concentration, which is a good indicator of air quality. It is however often the heat load, such as people, computers and sun, that is dimensioning the ventilation need in a room. These heat loads will almost always vary throughout the day and the night. By maintaining a constant supply air temperature, lower than...

VAV Choice of regulation type In smaller zones, with a clear pressure conditions (not too long supply air ducts) both in supply air and exhaust air, a VAV-system with a pressure regulation of the distribution air ducts is preferable. If motorized VAV-diffusers are required, a pressure regulation of the zone is necessary. 2) Non-motorized supply air diffusers Advantages: Simple diffusers without moveable parts. Low sound level particularly at reduced air flow. For units with widely varying pressure conditions, we instead recommend an airflow regulation of each zone. Existing systems can be...

Component qualities Airflow control Pressure control Measurement of airflow - airflow signal to CTS Linear functions dependent on pressure variation dependent on pressure variation pressure dependent pressure dependent damper angle Shut-off possible Constant airthrow (only mixed ventilation) not necessary (diffusers are controlled) by setting of static pressure or damper-position by setting of static pressure or damper-position EXHAUST AIR Requirements for supply air Airflow control Mechanical slave control motor for slave control Measurement airflow (exhaust) - air flow signal to CTS...

Explanations of units PR: Pressure regulation incl. pressure sensor DCT-RU: Regulator controlled motorized damper DCT-SU: Modulating motorized damper VRU-2: Airflow regulator (compact model) DCT-SP: Modulating motorized damper, to be programmed PKV-TM: Motorized VAV-unit DJP-RP: Regulator controlled motorized damper, to be programmed DJP-SP: Modulating motorized damper, to be programmed Right to alterations reserved

The supply air in the zone is pressure regulated. For details, see section “Pressure regulation”, page 526, under “Description of regulation types”. The supply air to the rooms is carried through motorized VAV-units controlled by Regula Combi. Exhaust in the zone is regulated with an airflow regulator, connected by a Master/Slave connection to a measuring device in the supply air, which measures the airflow. That way the same airflow is ensured going in or out of the zone, or a percentage difference if desired. Regula Combi Regula Combi The supply air in the zone is pressure regulated. For...

The supply air in the zone is pressure regulated. For details, see section “Pressure regulation”, page 526 under “Description of regulation types”. Supply air to the rooms is carried by non-motorized diffusers. In the right-hand room the air flow variation is obtained by the Regula Combi controlling the airflow regulators in the distribution duct for both supply air and exhaust. In the lefthand room there is a constant air flow (CAV), which is possible due to the supply air duct being pressure regulated. Possible pressure changes caused by the air flow regulators in the right room will be...

Supply air in the zone is pressure regulated. For details, see section “Pressure regulation”, page 526 under “Description of regulation types”. The pressure regulation damper is supplied with a motor to be programmed, and whose signal gives information about the damper position. Supply air to the rooms is carried through non-motorized diffusers. The airflow variation is obtained by the Regula Combi controlling the damper in the distribution ducts, so that more diffusers can be controlled by a single motorized damper. The exhaust in the zone is controlled by a “mechanical slave control”,...

Both supply air and exhaust air in the zone are airflow regulated. For details see section “Airflow regulation”, page 526 under “Description of regulation types”. Diffusers for supply air and exhaust air are normal diffusers. The temperature in the zone is maintained by the signal from Regula Combi which is used as a parallel signal to the airflow regulators in supply and exhaust air. Using this connection, the same airflow can be ensured in and out of the zone or with a constant difference between supply and exhaust air. If instead a percentage difference is wanted, a Master/Slave...

Can vary the volume flow between 0-100 % Min. flow preset from factory *) Max. flow to be set in MBB box based on k-value Settings can be changed with ZTH-GEN or Belimo PC-tool • VAV zone pressure must be controlled • The diffuser must be installed together with a MBB-S type plenum box • For exhaust PKA can be used (with Motor) PKV is a square PKA type diffuser with integrated motor for supply air of variable air volume (VAV). The integrated motorized damper ensures a constant throw so the Coanda effect always is maintained. The damper setting can be controlled by a room regulator, BMS or...