Supply and extract air unit with heat exchanger and heat recovery unit, secondary air option (based on air quality), for vertical installation on an external wall, e.g. adjacent to a window.
SA-V
Under sill ventilation units for vertical installation on the façade
TROX SCHOOLAIR-V under sill ventilation unit with supply and extract air function, heat recovery and switchover option to secondary air mode (depending on air quality) as well as heating and/or cooling function, for vertical installation on the façade:
- Device casing made of galvanised sheet steel
- Cover and sheet metal connections: Connection via deep-drawn threads and stainless steel cross-head screws
- All necessary internal air ducts sealed and insulated by lining
- Internal electrical cable glands sealed
- Visible surfaces powder-coated (RAL 9005, jet black)
- Sound and heat-insulating lining on the suction and discharge side:
- Glass fibre-laminated mineral wool (building material class A, non-combustible according to DIN 4102, T1), abrasion-resistant up to air velocities of 20 m/s, or closed-cell insulation material
- The device meets the hygiene requirements of VDI 6022
- Height-adjustable levelling feet, +40 mm, to compensate for structural tolerances
- Connection to the on-site outdoor air and exhaust air openings in the façade:
- With circumferential closed-cell sealing tape on the back of the device, 10 mm thick
- The intake and discharge resistance of the on-site construction should not exceed 20 Pa at nominal volume flow
- Room-side extract air intake at the top of the unit front
- Use of 2 energy-saving EC centrifugal fans:
- Supply and extract air fan classified in category SFP 0 (< 300 W/(m³/s)) in accordance with DIN EN 16798-3:2017-11
- Suitable for 4 speed levels:
- Control via the unit-integrated single-room control
- Volume flow rate correction possible after installation by adjusting the control voltage
- Technical requirements of EU Regulation 1253/2014 for non-residential ventilation systems:
- Compliant and documented in accordance with the regulation
- Motorised shut-off dampers in outdoor and exhaust air areas:
- Normally closed in inactive state due to capacitor
- Open-close actuator 230 V AC
- Control via the unit-integrated single-room control
- Automatic switchover to energy-efficient secondary air operation:
- Only in conjunction with air quality sensor
- Comparison of setpoints with the internal CO2 sensor readings
- If the indoor air quality is adequate: Automatic changeover from outdoor air mode to secondary air mode
- Connection point to the on-site electrical system:
- Cable for on-site connection (not included in TROX scope of supply)
- Cable (L, N, PE) with wire end ferrules, approx. 1 m exiting the device
- On-site electrical system: 1~ 230 V AC, 50 Hz, 3 x 1.5 mm2 (3-core)
- Electrical components in the device:
- Completely wired with FSL-CONTROL III control system
- Control components integrated in the device
- Connection option for bus communication (optional)
- Connection of room control panel etc. after opening the customer area of the control system
- Connection point to the on-site Measurement/Control/Regulation technology: Rail-mounted terminals type Wago 260
- Master unit:
- Optional integration into MCE/BACS via RS485 (Modbus/BACnet)
- Master-slave connection RS485
- Digital outputs DO
- Digital inputs DI
- Room control panel for measuring room temperature
- Slave unit:
- Master-slave connection RS485
- Connection point to the on-site Measurement/Control/ Regulation technology: Network connection RJ45
- Optional integration into an on-site MCE/BACS via Ethernet (Modbus/BACnet)
- RJ45 connection socket as service access to the user interface
- Under-sill cladding, to be provided by the client:
- Must have perforations: for supply air intake, for extract air and secondary air intake
- Must not restrict maintenance work or installation and removal of the unit from the front
- Clear distance between the front edge of the unit to the inner edge of the under-sill cladding: approx. 30 mm
- Closed-cell sealing tapes for sealing and adapting to the on-site cladding: not included in the TROX supply package
- Filter change:
- Quick filter change
- Tool-free opening of the filter cover thanks to user-friendly quarter-turn fasteners (after opening the on-site cladding)
- Accessibility must not be restricted by the on-site sill cladding
HV
Variant: high volume flow and rotary heat recovery unit
- Fixing points for installation:
- Slotted hole brackets on the side for wall fixing
- 2 additional slotted holes in the rear wall of the casing below the heat exchanger
- Upstream and downstream sound attenuators minimise the sound power levels and increase the fan efficiency at the same time
- Power consumption and connection dimensioning
- Electrical power consumption of the entire unit at nominal volume flow 400 m³/h < 76 W
- For dimensioning the connecting cable: Take into account a connected load of 647 VA
- Integrated condensing rotary heat revovery unit
- Modulating control
- Control via the unit-integrated single-room control
- High efficiency (heat recovery efficiency > 75 %)
- Humidity recovery in winter (up to 50 %)
- Outdoor air filter as Mini Pleat filter class ePM1 (fine dust filter):
- Filter class according to ISO16890: ISO ePM1 65%
- Eurovent-certified
- Made from high-quality, wet-strength glass fibre paper
- In tight pleats
- Spacers:
- Made from thermoplastic hot-melt adhesive
- Even distance between the pleats (4 mm)
- Frame made of moisture-resistant nonwoven fabric with pull-out tabs
- The frame must not reduce the airflow cross-section (filter size = airflow cross-section)
- Filter area ≥ 2.68 m²
- Extract air filter class G3 (coarse dust filter) as flat filter medium, filter class according to ISO 16890: ISO Coarse 60 %
- Monitoring of the filter life by integrated differential pressure monitoring
- 2-pipe aluminium copper tube heat exchanger for air heating:
- Adapted to the project-specific data
- Easily removable for cleaning (the on-site connection to the main pipework is crucial, not included in the TROX scope of delivery)
- Drain and vent option for each heating/cooling circuit
- Cleaning the heat exchanger:
- For easy removal: We recommend a connection to the on-site pipe network with flexible hoses (not included in the TROX scope of supply)
- Connection points are the heat exchanger connections, ½" flat-sealing with union nut
- Connection point to the on-site heating/plumbing works:
- Pre‑assembled, hand‑tightened control components
- Connection with male thread ½" flat-sealing
- On the return side: Valve including actuator
- On the flow side: Lockshield valve
- We recommend additional shut-off devices in the on-site supply lines
In normal operation, the devices rarely reach the design temperatures used to size the heat exchanger. For control of the required supply air temperature, the units often operate at only partial load of the designed water‑side capacity. We therefore recommend weather‑compensated control of the flow temperature. This allows the units to continue to be flushed with sufficient water to control the valve position.Providing the required flow temperature quickly at the units prevents long system response times. We therefore recommend installing a bypass between the flow and return after the last consumer.
- 4-pipe aluminium copper tube heat exchanger for air heating and cooling:
- Adapted to the project-specific data
- Easily removable for cleaning (the on-site connection to the main pipework is crucial, not included in the TROX scope of delivery)
- Drain and vent option for each heating/cooling circuit
- Cleaning the heat exchanger:
- For easy removal: We recommend a connection to the on-site pipe network with flexible hoses (not included in the TROX scope of supply)
- Connection points are the heat exchanger connections, ½" flat-sealing with union nut
- Connection point to the on-site heating/plumbing works:
- Pre‑assembled, hand‑tightened control components
- Connection with male thread ½" flat-sealing
- On the return side: Valve including actuator
- On the flow side: Lockshield valve
- We recommend additional shut-off devices in the on-site supply lines
In normal operation, the devices rarely reach the design temperatures used to size the heat exchanger. For control of the required supply air temperature, the units often operate at only partial load of the designed water‑side capacity. We therefore recommend weather‑compensated control of the flow temperature. This allows the units to continue to be flushed with sufficient water to control the valve position. Providing the required flow temperature quickly at the units prevents long system response times. We therefore recommend installing a bypass between the flow and return after the last consumer.
- Easy-to-clean condensate drip tray without condensate drain: made of galvanised sheet steel, powder-coated (RAL 9005)
KM
- Easy-to-clean condensate drip tray with condensate drain: Ø 12 x 1 mm made of galvanised sheet steel, powdercoated (RAL 9005)
Nominal size
- Width: approx. 605 mm (without fixing brackets)
- Height: approx. 2200 mm (without levelling feet, without fixing bracket)
- Depth: approx. 413 mm (including façade seal)
C3
With FSL-CONTROL III:
- Single room controller for DIN rail mounting in the unit or in a separate control casing
- Integrated microSD card as flash memory medium
- At least 2 GB storage space
- Saves the trend data
- Accessible via RJ45 connection socket
- For simple master-slave communication via Modbus RTU
- Connection of up to 10 slave units to one master unit
- Software:
- 3 operating modes: Off, Automatic, Manual mode
- 3 operating states: Occupied, Unoccupied, Standby
- 4 operating state overrides: Boost, Class, night purge, fan forced circuit
- Basic distinction between room temperature control by controlling heating and cooling valves or modulating bypass damper, or supply air temperature control for isothermal ventilation operation
- Year-round heat recovery use
Control function Master
- Software package specially developed for decentralised ventilation units
- Factory-equipped
- Configured for master units
- 42 digital or analogue inputs and outputs
- CO2-guided air quality control
- Alarm messages: Type A (shutdowns) and Type B (notifications)
Control function Slave
- Software package specially developed for decentralised ventilation units
- Factory-equipped
- 28 digital or analogue inputs and outputs
Only with control function MA
Real-Time-Clock (RTC):
- Part of the master software package
- Includes a simple time programme
- 7 days with 10 switching points each
- Automatic switching between summer and winter time
- Night purge schedules
With Modbus TCP
Modbus TCP interface (Ethernet):
- FSL-CONTROL III can be integrated into an on-site MCE/BACS via the Modbus TCP protocol.
- Required for visualisation via the X-TAIRMINAL
- Additionally including web server for simplified configuration, commissioning and remote monitoring of the device.
With BACnet IP
BACnet IP interface (Ethernet):
- FSL-CONTROL III can be integrated into an on-site MCE/BACS via BACnet IP protocol.
- Additionally including web server for simplified configuration, commissioning and remote monitoring of the device.
Only with control function MA
With Modbus RTU
Modbus RTU interface (RS 485):
- FSL-CONTROL III can be integrated into an on-site MCE/BACS via Modbus RTU
Only with control function MA
With BACnet MS/TP
BACnet MS/TP interface (RS485):
- FSL-CONTROL III can be integrated into an on-site MCE/BACS via BACnet MS/TP
Only with control function MA
Air quality sensor
With CO2sensor:
- Component of the master unit
- Sensor located in the extract air intake to monitor indoor air quality and control the outdoor air volume flow accordingly.
- Measurement via an NDIR sensor that works on an infrared basis and compensates for any contamination through its 2-beam measuring principle
- Measuring range 0 – 2000 ppm
Only with control function MA
Air quality sensor
With VOC sensor
- Detection of a wide range of VOC emissions correlating with the CO2concentration in indoor air
- TVOC mit auto-calibration
- Detected indoor air substances include alcohols, aldehydes, aliphatic hydrocarbons, amines, aromatic hydrocarbons, CO, CH4, liquid gas, ketones, organic acids
- Detection range: 0 – 2000 ppm, VOC and CO2equivalent
- Self-test and automatic zero-point adjustment
With supply air temperature sensor
- Supply air temperature sensor with NTC thermistor sensing element
- Resistance 10 kΩ at 25 °C
- Measuring range -35 – 105 °C
- Very short response time due to perforated measuring tip
A
With outside air temperature sensor (only with MA control function)
- Outdoor air temperature sensor with NTC thermistor sensing element
- Resistance 10 kΩ at 25 °C
- Measuring range -35 – 105 °C
Thermoelectric valve actuator:
- For opening and closing valves
- With position indicator
- Including plug-in connection cable and adapter ring
- Supply voltage: 24 V DC
- Control voltage 0 – 10 V DC
- Power consumption 1 W
- Protection rating: IP 54
Only with heat exchanger 4
Thermoelectric valve actuator:
- For opening and closing valves
- With position indicator
- Including plug-in connection cable and adapter ring
- Supply voltage: 24 V DC
- Control voltage 0 – 10 V DC
- Power consumption 1 W
- Protection rating: IP 54
Electromotive valve actuator
- For opening and closing valves
- Supply voltage: 24 V DC
- Maximum power consumption: 1.1 W
- Actuation by 0 – 10 V control signal
- Permissible media temperature 1 – 110 °C
- Automatic detection of the valve travel using integrated sensors
- Resolution of the control signal (0 - 10 V) to the valve travel
- Frost protection function with an integrated capacitor to ensure that the valve actuator moves to a predefined fail-safe position in the event of power failure
- Status indication via LC display and LED
- Equipped with NFC chip, configurable via app (iOS or Android)
- Valve travel 8.5 mm
- Actuating force 150 N
- Travel time 15 s/mm
- Including plug-in connection cable and adapter ring
Only with heat exchanger 4
Electromotive valve actuator
- For opening and closing valves
- Supply voltage: 24 V DC
- Maximum power consumption: 1.1 W
- Actuation by 0 – 10 V control signal
- Permissible media temperature 1 – 110 °C
- Automatic detection of the valve travel using integrated sensors
- Resolution of the control signal (0 - 10 V) to the valve travel
- Frost protection function with an integrated capacitor to ensure that the valve actuator moves to a predefined fail-safe position in the event of power failure
- Status indication via LC display and LED
- Equipped with NFC chip, configurable via app (iOS or Android)
- Valve travel 8.5 mm
- Actuating force 150 N
- Travel time 15 s/mm
- Including plug-in connection cable and adapter ring
Lockshield
- For regulation and shut-off
- Valve casing: straight way
- External thread on both sides ½" flat sealing
- Hand-tightened pre-assembled
- Nominal width DN 15
- Maximum media temperature 120 °C
Straight-through small valve:
- Straight-through valve body
- Male thread on both sides ½" flat sealing
- Pre-assembled hand-tight
- PN 16
- DN 10
- Kvs value 0.25
- Operating fluid temperature 1 – 110 °C
Straight-through small valve:
- Straight-through valve body
- Male thread on both sides ½" flat sealing
- Pre-assembled hand-tight
- PN 16
- DN 10
- Kvs value 0.40
- Operating fluid temperature 1 – 110 °C
Straight-through small valve:
- Straight-through valve body
- Male thread on both sides ½" flat sealing
- Pre-assembled hand-tight
- PN 16
- DN 10
- Kvs value 0.63
- Operating fluid temperature 1 – 110 °C
1.00
Straight-through small valve:
- Straight-through valve body
- Male thread on both sides ½" flat sealing
- Pre-assembled hand-tight
- PN 16
- DN 10
- Kvs value 1.00
- Operating fluid temperature 1 – 110 °C
Pressure-independent control valve
- Straight-through valve body
- Male thread on both sides ½" flat sealing
- Pre-assembled hand-tight
- With modulating Open-Close control in combination with an externally adjustable, dynamic volume flow controller
- With full valve authority
- Nominal width DN 10
- Media temperature 0 – 120 °C
- Extract air filter: Filter pad
- Outdoor air filter: Mini-Pleat-Filter
