SCHOOLAIR-V-2/KO/397×2160×359/C3
Under sill units for installation vertically on the facade
Please note:The described under sill ventilation unit variant is equipped with a single room control system arranged in the unit for autonomous classroom operation. The supplied controllers contain the standard control parameters for operation according to our control system description.
School ventilation unit – vertical installation - master unit
Under sill ventilation unit TROX SCHOOLAIR-V-2L with supply and extract air function, heat recovery and switchover option to secondary air operation (air quality dependent), as well as heating function, for vertical installation on the facade:
- Casing made of galvanised sheet steel, cover and sheet metal connections via deep-drawn threads and stainless steel cross-head screws, all necessary internal air ducts sealed and lined, internal electrical cable penetrations sealed, exposed surfaces powder-coated (RAL 9005, jet black)
- Sound- and heat-insulating lining on intake and discharge side made of mineral wool faced with glass fibre scrim (material classification A, non-combustible according to DIN 4102, T1), erosion resistant up to air velocities of 20 m/s, or closed cell insulation material
- The device meets the hygiene requirements of VDI 6022
- Levelling feet, +40 mm
- Slotted bracket at the top, with 2 slotted holes (6.5 x 13.5 [mm]) for fastening the unit to the wall
- In the lower part of the unit (behind the heat exchanger), there are 2 slotted holes (6.5 × 13.5 [mm]) for fastening the unit to the wall; connection to the outdoor air and exhaust air openings (provided by others) of the façade by means of perimeter closed cell sealing tape on the rear side of the unit, d = 10 mm, the intake and discharge resistance of the construction provided by others should not exceed 20 Pa at a nominal volume flow rate
- Extract air removal at the front, at the top
- Use of 2 energy-saving EC centrifugal fans, supply and extract air fans classified in category SFP 1 (< 500 W/(m³/s)) according to EN 16798-3:2017-11, electrical power consumption of the entire unit at a nominal volume flow rate of 250 m³/h < 44 W, a power rating of 226 VA has to be considered for the connecting cable
- Suitable for 3 speed levels (150, 200 and 250 m³/h as well as boost level with 320 m³/h), signalling via device-internal single room control system, volume flow rate level correction by adjusting the control voltage is subsequently possible
- Meets the requirements of EU directive 1253/2014 (ErP)
- Sound power level in supply-extract air operation at 150/200/250/320 m³/h = 31/36/41/46 dB(A) (corresponds to a sound power level of = 23/28/33/38 dB(A) at a room attenuation of 8 dB). The measurement data refer to sound power measurements of a single unit in a reverberation chamber according to accuracy class 1. Depending on the installation situation, deviations are possible
- Integral recuperative cross flow heat exchanger for heat recovery, salt water resistant aluminium design, with high efficiency due to special plate structure, plate spacing and package length, including condensate drip tray and discharge into the condensate drip tray of the heat exchanger
- With electromotive bypass which causes a large partial air volume flow to bypass the heat recovery, actuator 24 V (modulating), signalling via internal single room control system
- Motorised shut-off dampers in the outdoor/exhaust air area, normally closed when there is no power by means of energy storage, actuator 230 V, open/close, signalling via device internal single room control system
- Automatic switching to secondary air mode (only with an air quality sensor) if the indoor air quality (measured, for example, with the integral CO2 sensor) lies within the limits defined beforehand. The fresh air damper closes, the selfpowered secondary air damper opens and the extract air fan is switched off
- Electrical components contained in the unit are completely wired with FSL-CONTROL III, control components are integrated in the unit. Cable for connecting the unit (connection not part of the supply package) to the power supply (L, N, PE) with wire end ferrules led approx. 1 m out of the unit: As a transfer point to the electrical installation provided by others:
- Supply voltage (230 V): 3 wires, 3 × 1.5 mm² (L, N, PE)
- Connection possibility for bus communication (optional), connection of control panel, etc. after opening the customer area of the controls. As a transfer point to the controls provided by others:
- Rail mount terminals type Wago 260 for the connection (provided by others) of
- Digital inputs DI
- Digital outputs DO
- Master-slave connection RS485
- BMS connection (optional) RS485
- Control panel
- RJ45 socket as service access to the user interface
- The following sensors are arranged in the unit to control the single room control system (the actual room temperature is recorded at the control panel):
- Indoor air quality sensor CO2
- Supply air temperature measurement downstream of the heat exchanger
- Outdoor air temperature measurement in the outdoor air intake
- 2-pipe aluminium copper tube heat exchanger for air heating, matched to project-specific data, easily removable for cleaning depends on the connection to the main pipe - by others, not included in the TROX supply package), drainage and venting option per heating circuit, on the right when seen from the room. We recommend a connection to the pipe network (provided by others) with flexible hoses (not includedin the TROX supply package) so that the heat exchanger can be easily removed for cleaning
- Transfer points are the manually preassembled control components
- Valves in the return: transfer with G ½" external thread, flat seal
- Lockshields in the flow: transfer with G ½" external thread, flat seal
- Easy-to-clean condensate drip tray with condensate drain Ø 12 x 1 [mm] made from galvanised sheet steel (powdercoated RAL 9005)
- Outdoor air filter as Mini Pleat filter class ePM1 (fine dust filter):
- Filter class to ISO16890: ISO ePM1 65 %
- Eurovent-certified
- ePM1 filter media made from high-quality, wetstrengthened glass fibre paper are pleated, the spacers are made from thermoplastic hot-melt adhesive and ensure uniform spacing (4 mm) between the pleats
- The frame is made from moisture-resistant non-woven fibre with lugs (for pulling it out) and must not reduce the flow cross-section (filter size = flow cross-section).
- Extract air filter (coarse dust filter) as flat filter medium, filter class according to ISO16890: ISO Coarse 50 %
- Quick change of the filters is possible, since the filter insert can be opened without tools after opening the casing (by others) with the user-friendly quarter-turn fasteners (accessibility must not be restricted by the under sill trim that is provided by others)
- Closed cell sealing tapes for sealing and adaptation to the outer casing (by others) are not included in the TROX supply package
- The under sill trim provided by the customer is perforated in areas to be specified for supply air, for extract air and secondary air removal, and must not restrict maintenance work and unit assembly and disassembly on the front of the unit
- Clear distance between the front edge of the unit and the inner edge of the under sill trim approx. 30 mm
- The front of the unit must be completely accessible after disassembly of the outer casing
Units – dimensions and weight
- Width: approx. 397 mm
- Height: approx. 2160 mm (without levelling feet, without fixing bracket)
- Depth: approx. 359 mm (without façade sealing)
- Approx. 85 kg
FSL-CONTROL III controller
Including control system FSL-CONTROL III, as described below:
FSL-CONTROL III is described as stand-alone single room control equipment with a simple timer. Optional expansions, such as connection to the central BMS provided by others via Modbus TCP / Modbus RTU, BACnet MS/TP or BACnet IP, humidity sensors, return flow temperature sensors, electromotive valve actuators or pressure-independent control valves are included in the product range, but must be replaced with the standard components in the following description. A room temperature signal is also required. Various room control panels and sensors are available for this purpose. The corresponding optional equipment text modules can be found in the appendix of the following standard equipment for room-autonomous operation. We recommend commissioning by our technical service. You will find related text modules below.
TROX control module FSL-CONTROL III (order code ...-C3-MA ...):
- Single room controller for mounting on DIN mounting rail in the unit or in a separate control casing
- 42 digital or analogue inputs and outputs
- A micro SD card with up to 2 GB storage space is integrated as a flash storage medium. The trend data is stored here and can be accessed via the RJ45 service socket.
- Equipped at the factory with a software package for master units specially developed for decentralised ventilation units. The software enables simple master-slave communication via Modbus RTU
- Up to 10 slave devices can be connected to one master device
- The software provides 3 types of operation (Off, Automatic and Manual), 3 operating modes (Occupied, Unoccupied and Standby) and 4 operating mode overrides (Boost, Class, Night Ventilation and Fan Forced Circuit)
- Basic distinction between room temperature control by opening/closing heating and cooling valves or modulating bypass damper or supply air temperature control for isothermal ventilation
- CO2-guided air quality control
- Year-round heat recovery
- Filter monitoring
- Configurable DI, e.g. for connection (by others) of PIR sensors, window contacts, holiday switching, etc.
- Alarm signals type A (= switch-offs) and type B (= notifications)
Real time clock (RTC)
Real Time Clock (RTC/real time clock) (order code ...-T/...):
- 7 days with 10 switching points each
- Automatic summer / winter time changeover
- Temporal activation of night purge
CO2 sensor
CO2 sensor (order code…/C/…):
- Sensor arranged in the extract air intake of the master unit for recording the indoor air quality and corresponding control of the outdoor air flow rate
- Measurement via an NDIR sensor, which works on an infrared basis and compensates for any contamination by its 2-beam measurement principle
- Measuring range 0 – 2000 ppm
Supply air temperature sensor
Supply air temperature sensor (order code .../Z/...):
- Supply air temperature sensor with NTC thermistor as sensing element, resistance 10 kΩ at 25 °C, measuring range 0 – 50 °C
- Especially fast response time due to perforated measuring tip
Outdoor air temperature sensor
Outdoor air temperature sensor (order code .../A/...):
- Outdoor air temperature sensor with NTC thermistor as sensing element, resistance 10 kΩ at 25 °C, measuring range -30 – 50 °C
Water side components
Water-side components (order code .../HV-R-…/KV-R-…):
- Valve actuator: 1 × thermoelectric actuator for opening and closing valves, with position indicator, including pluggable power rating, supply voltage 24 V DC, control voltage 0 – 10 V DC, power consumption 1 W, degree of protection: IP 54
- Straight-way valve: 1 × small straight-way valve ½" as standard, pre-assembled hand-tight, PN 16, nominal width 10, kVS 0.4 (alternatively: 0.25, 0.63 or 1.0 m³/h – please specify the required kVS value), threaded connection G 1/2B, fluid temperature 1 - 110 °C
- Lockshields: 1x lockshield on both sides ½", manually pre-assembled, nominal width DN 15; ½ inch, valve body straight through with male thread on both sides, flat seal, for flow restriction and shut-off, operating temperature maximal 120 °C
Optional control accessories
Optional equipment to increase the comfort of the FSL-CONTROL III:
TROX control panels for FSL-CONTROL III
- At least one room temperature signal is required per room. There are different variants of TROX control panels available, optionally with or without step switching. Additionally we offer a room temperature sensor RTF without control elements. Alternative control panels provided by the customer must be connected via bus communication:
Control panels with selector switch for surface mounting:
Control panel with selector switch, for surface mounting, type Honeywell
- Supplied loose as accessory, with room temperature sensor, setpoint adjuster (blue or white), override button, LED and 3-step switch as well as off and automatic, installation on 60 mm flush box or directly on the wall, NTC thermistor as sensor element, resistance 20 kΩ at 25 °C, dimensions (B x H x T): 99 x 104 x 30 mm, operating temperature: 6 - 40 °C
Control panel with selector switch, for surface mounting, type Thermokon
- Supplied loose as an accessory, with room temperature sensor, setpoint adjuster (blue or white), override button, LED and 3-step switch as well as off and automatic, casing made from pure white PVC0 (RAL 9010) installation on 60 mm flush box or directly on the wall, NTC thermistor as sensor element, resistance 20 kΩ at 25 °C, dimensions (B x H x T): 84.5 x 84.5 x 25 mm, operating temperature: -35 – 70 °C
Control panels without selector switch for surface mounting:
Control panel without selector switch, for surface mounting, type Schneider
- Supplied loose as additional part, with mode display, push button and setpoint adjustment, sensor NTC 10 kΩ, protection level: IP 20, wall mounting or on 70 mm flush-mounted box, dimensions (B x H x T) 84 x 116 x 24 mm, colour light grey/white
Control panel without selector switch, for surface mounting, type Thermokon
- Supplied loose as additional part, with mode display, push button and setpoint adjustment, sensor NTC 20 kΩ, protection level: IP 20, dimensions (B x H x T) 84.5 × 84.5 × 25 mm
Room temperature sensor for surface mounting:
Room temperature sensor TROX RTF, surface mounting
- Supplied loose as additional part, room sensor without control elements, measuring range: -35...- 70 °C, sensor NTC 10 kΩ, screw terminal, d = 1.5 mm, protection level IP 20, for mounting on the face of the wall or on 70 mm flush-mounted box, dimensions (B x H x T) 85 x 85 x 30 mm, casing ABS in RAL 9010
Control panels without selector switch for flush mounting:
For manual operation of the ventilation units with a high-quality look and the matching design frame from a wide range of switch programmes, the unit is suitable for particularly design-oriented facilities.
Control panel without selector switch, for flush mounting, type Thermokon, switch from Berker S.1 range polar white
- Supplied loose as additional part, with mode display, push button and setpoint adjustment, sensor NTC 20 kΩ, protection level: IP 20
Control panel without selector switch, for flush mounting, type Thermokon, switch from Berker Q.3 range, white
- Supplied loose as additional part, with mode display, push button and setpoint adjustment, sensor NTC 20 kΩ, protection level: IP 20
Control panel without selector switch, for flush mounting, type Thermokon, switch from Busch Jäger future linear range, white
- Supplied loose as additional part, with mode display, push button and setpoint adjustment, sensor NTC 20 kΩ, protection level: IP 20
Further switch programmes on request.
Control panels without selector switch and without setpoint value adjuster for flush mounting:
Control panel without selector switch and without setpoint value adjuster, for flush mounting, type Thermokon, switch from Gira E2 range
- Supplied loose as additional part, with mode display and button, sensor NTC 20 kΩ, protection class: IP 20
Further switch programmes on request
Electromotive valve actuator:
As an alternative to the standard installed thermoelectric actuator
- 1 x electromotive actuator for opening and closing valves, supply voltage AC/DC 24 V, maximum power consumption 2.5 VA, signalling of control signal 3-point DC 0...10 V, permissible fluid temperature 1...110 °C
Pressure independent control valve:
As an alternative to the standard installed straight-way small valve
- 1 x pressure-independent control valve, manually pre-assembled with modulating open and close control in combination with an externally adjustable dynamic volume flow controller, with full valve authority, nominal width DN 10, ½ inch, valve casing straight through with male thread on both ends, flat seal, fluid temperature 0...120 °C
Interface for connection to central building management system (BMS) provided by others:
Modbus TCP interface including web server (order code .../MT/...)
To increase comfort, we recommend integration into a central building management system provided by others. FSL-CONTROL III offers the possibility to be connected to a central BMS provided by others using Modbus TCP protocol. Additionally incl. web server for simplified configuration, commissioning and remote monitoring of the device. The central BMS is not included in the supply package from TROX, only the interfaces listed above are available here.
- Modbus TCP interface (Ethernet)
BACnet IP interface including web server (order code .../BI/...)
To increase comfort, we recommend integration into a central building management system provided by others. FSL-CONTROL III offers the possibility to be connected to a central BMS provided by others using BACnet IP protocol. Additionally incl. web server for simplified configuration, commissioning and remote monitoring of the device. The central BMS is not included in the supply package from TROX, only the interfaces listed above are available here.
- BACnet IP interface (Ethernet)
Modbus RTU (order code .../MR/...)
To increase comfort, we recommend integration into a central building management system provided by others. FSL-CONTROL III offers the possibility to be connected to a central BMS provided by others using Modbus RTU protocol. The central BMS is not included in the supply package from TROX, only the interfaces listed above are available here.
- Modbus RTU interface (RS485)
BACnet MS/TP (order code .../BM/...)
To increase comfort, we recommend integration into a central building management system provided by others. FSL-CONTROL III offers the possibility to be connected to a central BMS provided by others using BACnet MS/TP. The central BMS is not included in the supply package from TROX, only the interfaces listed above are available here.
- BACnet MS/TP interface (RS485)
Commissioning of the decentralised ventilation units
Commissioning / parameter setting of decentralised ventilation units without connection to the central building management system
- Visual inspection of the unit connections carried out by others for compliance with the respective installation specifications from the installation and configuration instructions: air connections, heating/cooling connection, electrical connections, integration into the outer casing, connections of external devices
- Checking and, if necessary, adapting the project parameters pre-set in the factory with regard to customer-specific adaptations
- Functional test of the individual components (actuators, fans, valves, dampers, sensors)
- Checking the project-specific control functions including any special functions such as volt-free switch contacts
- Documentation of the device settings, as well as their use in a service report. The service report must be signed by your company as the customer or your representative
- The invoice is made as a flat rate, derived from the number of devices and distance
Commissioning / parameter setting of decentralised ventilation units with connection to the central building management system
- Visual inspection of the unit connections carried out by others for compliance with the respective installation and configuration instructions: air connections, heating/cooling connection, electrical connections, integration into the outer casing, connections of external devices, central building management system connections
- Checking and, if necessary, adapting the project parameters pre-set in the factory with regard to customer-specific adaptations
- Functional test of the individual components (actuators, fans, valves, dampers, sensors)
- Checking the project-specific control functions including any special functions such as volt-free switch contacts
- Function test of the communication to the central BMS in cooperation with the ordered controls company:
- Check that the settings that are provided by others comply with the specifications in the installation and configuration instructions
- Input test of the data points sent by the customer
- Output test of the output data points
- Trial operation of the operating conditions switchable by the central BMS
- Documentation of the device settings, as well as their use in a service report. The service report must be signed by your company as the customer or your representative
- The invoice is made as a flat rate, derived from the number of devices and distance
Instruction in operation and maintenance
- One-off instruction for the operation of the decentralised ventilation units consisting of:
- Description of the equipment functions on the unit that has already been put into operation
- Description of the room control panel and the room conditions that can be influenced by it
- Description of maintenance work
- The invoice is a flat rate and is carried out by the responsible sales representative
