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Patented ISOSTREAM® modular system with 45 mm thick wall panels made of galvanized steel sheet with external painting in RAL9002 (grey-white). The panels are internally filled with sound and thermal insulation made of non-combustible glass mineral wool. For ease of servicing, the unit cabinet is equipped with lockable doors with locks or fully removable panels. The unit frame is made of aluminium profiles, the wall panels are screwed into the frame. From the service side, the unit cabinet is equipped with an opening door with pressure locks, alternatively fully removable panels can be supplied. The condensate outlets from the heat exchanger and condenser are always located in the bottom panel of the unit and are ready for connection to the odour trap. At the customer's request, the unit shell can be provided with atypical surface protection with higher corrosion resistance.
Fans
Fans with backward curved blades are mounted on the supply and exhaust sides of the unit. The impeller is made of composite material and is statically and dynamically balanced.
Motors
An EC motor is directly mounted on the fan impeller. The fan motor can be continuously controlled by an external 0...10 V signal. The motor is equipped with its own built-in thermal protection. Motor efficiency class IE4, motor protection IP54.
Regenerator
Rotary regenerative heat exchanger for heat transfer or for transferring heat and moisture simultaneously. The heat exchanger is designed for operation at ambient temperatures of -20 °C to +55 °C. The rotor of the regenerator is alternately wound from a flat and shaped layer of aluminium foil. The standard spacing of the layers is 1.6 mm. The rotor casing is made of galvanized support profiles. The seal between the rotor and the housing is provided by a brush seal. To increase the tightness of the regenerator, the exchanger wheel can be equipped with a labyrinth seal with a leakage value below 1.5% of the air volume flow. The rotary heat exchanger drive consists of an electric motor with worm gear, pulley and belt. The supply voltage of the electric motor is 1x 230 V / 50 Hz or 3x 230 V / 50 Hz. On request, the regenerator can be equipped with a continuous speed control with 0...10 V control.
Filters
The fresh air intake and the exhaust air intake can be equipped with 2 sets of compact filter elements of different filtration classes with a thickness of 48 mm or 1 set of filter elements with a thickness of 96 mm. Filters are available in filtration classes from G4 to F9. Access to the filters is via the inspection door on the service side of the unit.
Flaps
Aluminum control dampers with servo drive mounting preparation are integrated on the fresh air intake and waste air discharge. The dampers meet leakage class 2 according to EN1751. On request, the unit can be retrofitted with dampers in leakage class 3.
Heaters and air coolers
Depending on the design, the unit is equipped with a water or electric air heater. For air cooling needs, a water cooler or direct evaporator is fitted. For direct heating and cooling, the evaporator can be made reversible and operation with bivalent water or electric heating can be selected. Evaporators are designed for R410A and R32 refrigerant as standard. Water heaters, chillers and evaporators have copper tubes and aluminium fins in a galvanised steel frame as standard. For the need of higher corrosion protection, the heat exchangers can be provided with additional corrosion protection. The electric heaters have smooth heating rods as standard and are equipped with an operating thermostat with a starting temperature of 60 °C and an emergency thermostat with manual reset and a starting temperature of 120 °C.
Electrical connection
Power supply voltage is 3x 400 V / 50 Hz. Supply cables, sensor cables and power cables are fed into the unit via plastic grommets in the wall of the unit. Inside the unit, rubber grommets with membrane are provided for cable routing.
Regulation
The unit is equipped as standard with Digireg® digital control according to the unit configuration. In case the unit is equipped with a MaR system directly from the factory, all sensors and actuators are electrically connected and tested. The control cabinet is located on the side service wall of the unit (in case of atypical location of the MaR control cabinet, this must be consulted with the manufacturer and specified in the order).
Mounting
In vertical position on the floor of the machine room or on the roof of the building. See below for the specific location of the supply and exhaust air outlets in relation to the service side. A prescribed service space must be maintained in front of the unit for service intervention, filter changes, etc. Space must be provided below the unit for the installation of a condensate drain trap. The unit must be installed with a 1° slope towards the condensate drain on the air cooler side. The HVAC piping shall be connected to the prepared rectangular outlets integrated in the sandwich panel. It is recommended that flexible sleeves be installed between the duct throats and the unit to eliminate vibration transfer from the unit to the ductwork. The rectangular throats are integrated in the wall sandwich panel of the unit and the spacing of the corner connection holes is optimized for P30 connection flanges (30 mm flange height).
Noise
Noise figures shown in the tables represent the sound power levels at the individual throats of the unit with weighting filter correction A, the sound power level of the whole unit shell. Acoustic parameters are within ±3 dB.
Variants
Individual unit variants are differentiated according to the equipment by means of a code. Atypical versions must be consulted.
Warranty conditions
The DUOVENT® MODULAR RV, including the DVAV, DCAV and DCOP control system, must be commissioned exclusively by the Seller or a person designated by the Seller for this purpose. Failure to comply with this condition shall result in the termination of the Buyer's rights under defective performance and the Quality Warranty. Further conditions are set out in the Seller's Complaints Procedure.
Air Conditioning Accessories
- SPIRO circular spiro pipes and fittings
- IAE flexible couplings
- IAA silencers
- TSK check valves
- MSK, IJK throttling and mixing dampers
- Plate valves, anemostats, nozzles, grilles
- Rain shutters
- ESU mixing nodes
- SF-P vacuum siphon
EL Accessories
- Digireg® digital control system for both heating and cooling units, touchscreen controller
- JTR triac switch for controlling electric heater output
- HIG, HYG hygrostats
- AIRSENS, EDF-CO2, SQA CO2
- RTR thermostats
- DTS PSA pressure sensors
- Servo drives
