Description
FOR PRECISE CONTROL OF NORMAL TO HIGH CONSTANT VOLUME FLOW RATES
Rectangular, mechanically self-powered air terminal units for supply and extract air systems with constant air volume flows
- Suitable for volume flow rates up to 7416 cfm
- Volume flow rate adjustment from outside by rotary knob
- Easy retrofitting of an actuator for volume flow setpoint adjustment
- High control accuracy
- No on-site test measurements required for commissioning
- Casing air leakage to EN 1751, class C
- Visual display of the damper blade position for operating point optimization
Optional equipment and accessories
- Acoustic cladding for the reduction of case-radiated noise
- Secondary silencer Type TX for the reduction of air-regenerated noise
- Hot water heat exchanger Type WT for reheating the airflow
- Actuator for setpoint value switching or steady operation
Application
- Rectangular CAV terminal units for supply or extract air volume flow control in constant volume flow systems
- Mechanical self-powered volume flow control without external power supply
- Simplified project handling by ordering based on nominal size
Special features
- Setting of the volume flow setpoint from the outside by rotary knob
- High control accuracy of the set volume flow rate
- Correct operation even under unfavorable upstream conditions
- Visual display of the damper blade position for operating point optimization
- Easy retrofitting of an actuator for volume flow setpoint adjustment
Nominal sizes
- 19 nominal sizes from 8 × 4 to 24 x 24 in
Variants
- EN: Air terminal units
- EN-D: Air terminal units with acoustic cladding
- Air terminal units with acoustic cladding and/or secondary silencer type TX for high acoustic requirements
Construction
- Galvanized sheet steel
- P1: Powder-coated, silver grey (RAL 7001)
Parts and characteristics
- Air terminal unit ready for commissioning
- Damper blade with low-friction bearings
- Bellows for vibration damping
- Cam plate with leaf spring
- Rotary knob pointer and scale for adjusting the flow rate setpoint
- Each air terminal unit is tested in the factory on a special ventilation test rig
- Visual display of the damper blade position for operating point optimization
Attachments
- Min/Max actuators: Actuators for switching between minimum and maximum volume flow rate setpoint values
- Variable actuators: actuators for variable volume flow or for switching volume flow setpoints
- EN with actuator only up to H = 12 in
Useful additions
- Rectangular casing
- Secondary silencer Type TX
- Heat exchangers Type WT
Construction features
- Rectangular casing
- Flanges on both ends, suitable for duct connections
- Air terminal units from H = 400 mm as double version (2 dampers with separate setting scales)
- Acoustic cladding cannot be retrofitted
Materials and surfaces
- Galvanized sheet steel construction
- Casing and damper blade made of galvanized sheet steel
- Leaf spring made of stainless steel
- Polyurethane bellows
- Plain bearings with PTFE coating
- Cam plate and adjusting unit made of galvanized sheet steel
- Powder-coated construction (P1)
- Variant with acoustic cladding (-D)
- Acoustic cladding made of galvanized sheet steel
- Rubber seal for the insulation of structure-borne noise
- Lining made of mineral wool
Mineral wool
- Acc. to EN 13501, fire rating class A1, non-combustible
- RAL quality mark RAL-GZ 388
- Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008
Standards and guidelines
Meets the hygiene requirements of
- EN 16798, Part 3
- VDI 6022, Sheet 1
- DIN 1946, Part 4
- For further standards and guidelines, please refer to the hygiene certificate
Casing air leakage
- EN 1751, Class C
Maintenance
- Maintenance-free as construction and materials are not subject to wear
Literature