X-CUBE/SCHOOLAIR-B-2/KR/1590×646×420/C3

School ventilation unit – under sill installation – MASTER UNIT

Please note:

The described under sill ventilation unit variant is equipped with a single room control system arranged in the unit.

The supplied controllers contain the parameters of the standard control for operation according to our control description

Under sill ventilation unit TROX X-CUBE/SCHOOLAIR-B with supply and extract air function and switchover option to secondary air operation (air quality dependent), heat recovery and heating function for installation in front of the sill below the window sill:

• Unit casing made of galvanised sheet steel, cover and sheet metal connections with deep-drawn threads and stainless steel cross-head screws, all internal air ducts sealed and lined as required, internal cable penetrations sealed, exposed surface powder-coated (RAL 9005, jet black)
• Sound and heat-insulating lining on suction 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 unit meets the hygiene requirements of VDI 6022
• Height adjustable levelling feet, +40 mm, to compensate for structural tolerances
• Slotted hole brackets on both sides for fixing to the wall or sill
• Connection to the outdoor air and exhaust air openings (provided by others) to the existing facade by means of circumferential closed cell sealing tape on the rear side of the unit, d=10mm, the suction and discharge resistance of the construction provided by others should not exceed 20 Pa at a nominal volume flow rate
• Use of 2 energy-saving EC centrifugal blowers, supply and extract air fan classified in category SFP 0 (< 300 W/(m³/s) according to DIN EN 16798-3:2017-11 electrical power consumption of the entire unit at nominal flow rate 250 m³/h < 40 W, a connected load of 238 VA must be taken into account for rating the connecting cable
• Suitable for 3 speed levels (150, 200 and 250 m³/h as well as boost level of 320 m³/h), signalling by means of integrated single room control system. The volume flow rate can be corrected at a later stage by adjusting the control voltage
• Meets the requirements of EU Regulation 1253/2014 (ErP Directive)
• Sound power level in supply-extract air operation at 150/200/250/320 m³/h = 29/34/38/43 dB(A) (corresponds to a sound pressure level of = 21/26/30/35 dB(A) at a system 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. Results may vary, depending on the installation situation
• Integral cross flow heat exchanger, recuperative, salt water resistant aluminium construction, highly efficient thanks to special plate design, plate spacing and package length, including condensate drip tray
• With electromotive bypass which allows a large partial air volume flow ate to bypass the heat recovery unit, actuator 24 V (modulating), signalling via device-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/closed, signalling via device-internal single room control system
• Automatic switching to secondary air mode (only with an air quality sensor) if the room air quality (measured with the integrated CO₂sensor) is within the defined limits. For this purpose, the shut-off dampers are closed, the self-powered secondary air damper opens and the extract air fan is switched off
• Integral electrical components are completely wired with FSL-CONTROL III, control components are integrated in the unit. Cable for on-site connection (connection not included in TROX scope of supply) of the power supply (L, N, PE) with wire end ferrules led approx. 1 metre out of the unit: As a transfer point to the on-site electrical installation:
  • Supply voltage (230 V): 3 wires, 3 x 1.5 mm² (L, N, PE)
• Connection option for bus communication (optional), connection of room control panel etc. after opening the customer area of the control unit. As a transfer point to the on-site measurement/control/regulation system:
  • Rail mount terminals type Wago 260 for the on-site connection of
    • Digital inputs DI
    • Digital outputs DO
    • Master-slave connection RS485
    • Optional integration in MCE/BACS via RS485 (Modbus/BACnet)
    • Room control panel
    • RJ45 socket as service access to the user interface
    • Optional integration into an on-site MCE/BACS via Ethernet (Modbus/BACnet)

• The following sensors are included in the unit as part of the single room control system (the actual room temperature is captured at the room control panel):
  
  • Room air quality sensor CO₂
  • Supply air temperature measurement downstream of the heat exchanger
  • Outdoor air temperature measurement in the outdoor air intake
• 2-pipe heat exchanger for air heating and cooling, easily removable for cleaning, can be emptied and ventilated in heating circuits. We recommend using flexible hoses to connect the unit to the pipework so that the heat exchanger can be easily removed for cleaning.
• The transfer point of the heat exchanger are the union nuts, to which the control components (valve including actuator in the return flow, lockshield in the flow) are pre-assembled hand-tight
• Easy-to-clean condensate drip tray with condensate drain Ø 12 x 1 [mm] made from galvanised sheet steel (powder-coated RAL 9005)
• Outdoor air filter as Mini Pleat filter, class ePM1 (fine dust filter):
  • Filter class according to ISO 16890: ISO ePM1 65%
  • Eurovent-certified
  • ePM1 filter media are made of high-quality, wet-strengthened glass fibre paper, pleated, with spacers made of thermoplastic hot melt adhesive to ensure uniform spacing (4 mm) between the pleats
  • The frame is made of moisture-resistant non-woven fibre with pull-out brackets and must not reduce the flow cross-section (filter size = flow cross-section)
  • Filter area >= 2.90 m²
• Extract air filter class G3 (coarse dust filter) as flat filter medium, filter class according to ISO 16890: ISO coarse 55%
• Filters can be changed quickly, as the filter insert can be opened without tools after opening the on-site casing using user-friendly quarter-turn fasteners (accessibility must not be restricted by the on-site under sill trim)
• Possibility of supporting a window sill provided by the customer, extract air intake is below the window sill, on the top of the unit
• Closed cell sealing tapes for sealing and adaptation to the outer casing are not included in the TROX supply package
• The on-site sill cladding (scope of supply by TROX possible on request) is provided with perforations in specified areas of the radiator for the air supply into the room and must not restrict maintenance work or unit assembly/disassembly on the front of the unit. On the top of the casing, there is also a perforation in areas to be specified for extract air removal
• Clear distance of approx. 30 mm between the front edge of the unit and the inner edge of the under sill trim
• The front of the unit must be completely accessible after removal of the outer casing

Units - dimensions and weight:

Width: approx. 1590 mm (incl. fixing brackets)
Height: ca. 646 mm (levelling feet to top edge of unit, additional distance for extract air suction)
Depth: approx. 420 mm (without seals)
Weight: approx. 80 kg

FSL-CONTROL III controller

Including control system FSL-CONTROL III, as described below:

FSL-CONTROL III is described as a stand-alone single room control system with a simple timer. Optional expansions, such as integration into an on-site MCE/BACS via Modbus TCP, Modbus RTU, BACnet MS/TP or BACnet IP, humidity sensors, return temperature sensors, electromotive valve actuators or pressure-independent control valves, are included in the delivery programme, but must be exchanged for the standard components in the following description. A room temperature signal is also required. Various room control panels and sensors are available to provide this signal. Suitable optional equipment can be found after the following standard equipment for stand-alone operation. - please refer to: Optional control accessories. We recommend commissioning by TROX. You will find related text modules below.

TROX control module FSL-CONTROL III (order code ...-C3-MA ...):

• Single room controller to be mounted on a DIN mounting rail in the unit or in a separate control equipment box
• 42 digital or analogue inputs and outputs
• A MicroSD card (at least 2 GB storage space) is integrated as a flash memory medium. The trend data are stored there and can be retrieved via the RJ45 socket
• Factory-equipped 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 controlling heating and cooling valves or continuous bypass damper or supply air temperature control for isothermal ventilation operation
• CO₂ guided air quality control
• Heat recovery all year round
• Filter monitoring
• Configurable DI for on-site connection of presence detectors, window contacts, holiday switching, etc.
• Alarm messages: Type A (shutdowns) and Type B (notifications)

Real time clock (RTC)

Real Time Clock (RTC/real time clock) (order code ...-T/...):

• Component of the Master Software Package
• Enables a simple timer
  • 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, 10 kΩ at 25 °C, measuring range -35 to 105 °C
• Very short 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, 10 kΩ at 25 °C, measuring range -35 to 105 °C

Water side components

Water-side components (Order code…/HV-R-…):

Valve actuator:

1 × thermoelectric actuator for opening and closing valves, with position indicator, including plug-in connecting cable, operating voltage 24 V DC, control voltage 0 - 10 V DC, power consumption 1 W, protection class: IP 54

Straight-way valve:

1 × small straight-way valve ½" standard, hand-tight pre-assembled, PN 16, DN 10, k_vs 0.4 (alternatively 0.25, 0.63 or 1.0 m³/h - please let us know the required k_vs value), straight-way valve body with external thread on both sides ½" flat sealing, media temperature 1 to 110 °C

Lockshield:

1 × lockshield on both sides ½", hand-tight pre-assembled, nominal width DN 15; straight-through valve body with external thread on both sides ½" flat sealing, for regulating and shut-off, maximum media temperature 120 °C

Optional control accessories

Optional equipment to increase the comfort of the FSL-CONTROL III:

TROX room control panels for FSL-CONTROL III

At least one room temperature signal is required per room. There are several variants of TROX room control panels available, optionally with or without selector switch. Additionally, we offer a room temperature sensor RTF without control elements. Alternative on-site room control panels must be connected via bus communication.

Digital room control panels for surface mounting:

For operation and adjustment of the ventilation units.

• Supplied loosely as an accessory. Connection to the master unit via Modbus serial line. Project-specific software including setpoint value adjuster, various status displays, selector switch, CO₂ indicator. Touch-sensitive colour display 3.5" 320 × 240 pixels. Sensor: NTC 10 kΩ. Degree of protection: IP 20. Type: Schneider TM172DCLWT. Dimensions (H × B × T): 120 × 86 × 25 mm, weight: 340 g, colour: white. Installation: Surface mounting or on a standard flush-mounted box. Power supply: 24 V DC (including suitable switching power supply unit for flush-mounted installation). Power consumption: 3.2 VA/1.3 W. Other design frames are available upon request and for a surcharge.

Control panels with selector switch for surface mounting:

Control panel with selector switch, type Thermokon, for surface mounting:

• Supplied loosely as an accessory, with room temperature sensor, setpoint adjuster, override button, LED and 3-step selector switch as well as off and automatic, casing made of PVC0 pure white (RAL 9010), mounting on 60 mm flush-mounted box or directly on the wall, NTC thermistor as sensor element, resistance 20 kΩ at 25 °C, dimensions (B × H × T): 84.5 × 84.5 × 25 mm, operating temperature: -35 to 70 °C

Control panels without selector switch for surface mounting:

Control panel without selector switch, type Thermokon, for surface mounting:

• Supplied loosely 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 loosely as an accessory, room temperature sensor without any control elements, measuring range -35 to 70 °C, sensor NTC 10 kΩ, connection terminal screw terminal, d = 1.5 mm, protection level IP 20, surface mounting or on a 70 mm flush-mounted box, dimensions (B × H × 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 from a wide range of switch programmes, the unit is suitable for particularly design-oriented facilities.

Control panel without selector switch, type Thermokon, for flush mounting, switch programme Berker S.1, polar white

• Supplied loosely as an accessory, with mode display, push button and setpoint adjuster, NTC sensor 20 kΩ, protection level: IP 20

Control panel without selector switch, type Thermokon, for flush mounting, switch programme Berker Q.3, white

• Supplied loosely as an accessory, with mode display, push button and setpoint adjuster, NTC sensor 20 kΩ, protection level: IP 20
   

Control panel without selector switch, for flush mounting, type Thermokon, switch programme Busch-Jäger future linear, white

• Supplied loosely as an accessory, with mode display, push button and setpoint adjuster, NTC sensor 20 kΩ, protection level: IP 20

Other 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, type Thermokon, for flush mounting, switch programme Gira E2

• Supplied loosely as an accessory, with mode display and push button, NTC sensor 20 kΩ, protection level: IP 20

Other switch programmes on request

Electromotive valve actuator:

As an alternative to the thermoelectric actuator, installed as standard

• 1 x electromotive actuator for opening and closing valves, supply voltage AC/DC 24 V, maximum power consumption 2.5 VA, control input signal 3-point DC 0 to 10 V, operating fluid temperature 1 to 110 °C

Pressure-independent control valve

As an alternative to the small straight-way valve, installed as standard

• 1 × pressure-independent control valve, hand tight pre-assembled with modulating ON/OFF control in combination with an externally adjustable, dynamic volume flow controller, with full valve authority, nominal width DN 10, straight-through valve body with male thread on both sides ½" flat sealing, media temperature 0 to 120 °C

Interface for integration into an on-site MCE/BACS: Modbus TCP interface including web server (order code .../MT/...)

To increase convenience, we recommend integration into an on-site MCE/BACS or visualisation with X-TAIRMINAL. FSL-CONTROL III can be integrated into an on-site MCE/BACS via the Modbus TCP protocol. Additionally including web server for simplified configuration, commissioning and remote monitoring of the unit. The MCE/BACS is not included in the supply package from Trox SE, only the interfaces listed above are available here.

• Modbus TCP interface (Ethernet)

BACnet IP interface including web server (order code .../BI/...)

To increase convenience, we recommend integration into an on-site MCE/BACS. FSL-CONTROL III offers the option of being integrated into an on-site MCE/BACS via the BACnet IP protocol. Additionally including web server for simplified configuration, commissioning and remote monitoring of the unit. The MCE/BACS is not included in the supply package from Trox SE, only the interfaces listed above are available here.

• BACnet IP interface (Ethernet)

Modbus RTU (order code .../MR/...)

To increase convenience, we recommend integration into an on-site MCE/BACS. FSL-CONTROL III offers the option of being integrated into an on-site MCE/BACS via Modbus RTU. The MCE/BACS is not included in the supply package from Trox SE, only the interfaces listed above are available here.

• Modbus RTU interface (RS485)

BACnet MS/TP (order code .../BM/...)

To increase convenience, we recommend integration into an on-site MCE/BACS. FSL-CONTROL III offers the option of being integrated into an on-site MCE/BACS via BACnet MS/TP. The MCE/BACS is not included in the supply package from Trox SE, only the interfaces listed above are available here.

• BACnet MS/TP interface (RS485)

 Version as SLAVE DEVICE

Identical to the MASTER DEVICE, as described above, but with the following deviations:

• No room air quality measurement in the unit
• No connection option for room control panels
• No outdoor temperature detection in the outdoor air
• No connection to on-site bus communication possible
• Pre-assembled self-sufficient control system for decentralised façade ventilation units in SLAVE construction

Replacement filter set suitable for the appliance version

• Extract air filters cut to size as filter mats
• Outdoor air filter as Mini Pleat filter

Commissioning of the decentralised ventilation units

Commissioning/parameterisation of the decentralised ventilation units without integration into an on-site MCE/BACS

• Visual inspection of the device connections on site for compliance with the respective installation specifications from the installation and configuration instructions: air connections, heating/cooling connection, electrical connections, integration into the installed outer casing, connections of external components
• 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 (control elements, 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 and service work in a service report. The service report must be signed by your company or representative as the client.
• Invoicing is done as a flat rate, derived from the number of units and distance.

Commissioning/parameterisation of the decentralised ventilation units with integration into an on-site MCE/BACS

• Visual inspection of the device connections on site for compliance with the respective installation specifications from the installation and configuration instructions: air connections, heating/cooling connection, electrical connections, integration into the installed outer casing, connections of external components, connections of MCE/BACS
• 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 (control elements, 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 MCE/BACS in cooperation with the controls provider:
  • Checking that the on-site settings comply with the specifications in the installation and configuration instructions
  • Input test of the data points sent on site
  • Output test of the output data points
  • Trial operation of the operating states that can be switched by the MCE/BACS
• Documentation of the device settings and service work in a service report. The service report must be signed by your company or representative as the client.
• Invoicing is done as a flat rate, derived from the number of units and distance.

Instruction in operation and maintenance

• One-time 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 the maintenance work
• Invoicing is done on a flat-rate basis. The instruction is carried out by the responsible sales representative

Installation and commissioning

• Installation on the floor in front of the external wall
• Level adjustment using the 4 levelling feet (+40 mm)
• 4 side fixing brackets (supplied separately) for screwing in to the wall, alternatively 2 fixing points can be used on the top of the device