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Specification text
SA-B
Under sill units for horizontal mounting on the façade
TROX SCHOOLAIR-B 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 installation on an external wall below the window sill:
- 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 lined
- 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
- 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
- Extract air intake at the top of the device (below the window sill)
- 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
- Subsequent correction of volume flow rate steps possible by adjustment of 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 actual values measured, for example, by the internal CO2 sensor
- 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 unit
- 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 access area of the control system
- Connection point to the on-site Measurement/Control/ Regulation works: Rail-mounted terminal blocks, 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 works: 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 customer:
- Must have perforations: for introduction of supply air, and 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 userfriendly quarter-turn fasteners (after opening the onsite cladding)
- Do not restrict accessibility of the under-sill cladding
HVVariant high volume flow and rotary heat recovery unit
- Fixing points for installation:
- The unit is provided with six rivet nuts for mounting the separately supplied L‑brackets (4 pcs): two in each side wall and two in the top of the unit.
- For the corner points, please select either the fixing points on the top of the device or in the side panels
- Additionally, 4 slotted holes are provided in the rear wall of the casing next to the heat exchanger
- Upstream and downstream sound attenuators:
- For maximum reduction of sound power levels while increasing fan efficiency
- Integrated condensing rotary heat exchanger
- 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 ≥ 3.30 m²
- Extract air filter class G3 (coarse dust filter) as flat filter medium, filter class according to ISO 16890: ISO Coarse 60 %
- Monitoring of filter service life by integrated differential pressure monitoring
EH with electric heating coil
- Electric heating coil for air heating:
- Maximum surface temperature 60 °C: Dust smouldering is reliably prevented
- Including control loop consisting of: Temperature sensor NTC 10 kΩ and power controller
- Supply air temperature: max. 25 °C
- Including safeguards:
- Mechanical safety temperature limiter: self-resetting
- Mechanical safety temperature monitor: manual-reset
,
16
Variant: Electric heating coil
- EH-16:
- Maximum heating capacity 1650 W, modulating control
- For dimensioning the connecting cable: Take into account a connected load of 2400 VA
- Electrical power consumption of the entire unit at nominal volume flow 400 m³/h < 1755 W
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KO
Only with heat exchanger EH
,
Nominal size
- Width: approx. 2100 mm (without fixing brackets)
- Height: approx. 740 mm (without levelling feet, additional distance for extract air intake)
- Depth: approx. 403 mm (including façade seal)
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
,
MA
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)
,
SL
Control function Slave
- Software package specially developed for decentralised ventilation units
- Factory-equipped
- 28 digital or analogue inputs and outputs
,
T
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
MTWith 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.
,
BI
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.
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MR
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
,
BM
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
,
V
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
- Extract air filter: Filter pad
- Outdoor air filter: Mini-Pleat-Filter
| SA-B | – | HV | – | EH | – | 16 | – | KO | / | 2100 × 740 × 403 | / | C3 | – | MA | – | T | / | MT | / | C | / | Z | / | A |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| 1 | | 2 | | 3 | | 4 | | 5 | | 6 | | 7 | | 8 | | 9 | | 10 | | 11 | | 12 | | 13 |
1 Type
SA-B horizontal decentralised sill ventilation unit X-CUBE/ SCHOOLAIR-B
2 Variant
HV high volume flow and rotary heat recovery unit
3 Heat exchanger
EH with electric air heater
4 Heat exchanger construction
16 1650 W
5 Construction
KO without condensate drain
6 Nominal size [mm]
Width × height × depth
2100 × 740 × 403
7 Control system
OR without control system
C3 with FSL-CONTROL III
8 Control function
MA Master
SL Slave
9 Real-time clock
Only with control function MA
No entry: without real time clock
T with real time clock
10 Interface
No entry: without interface
MT with Modbus TCP
MR with Modbus RTU (only with control function MA)
BI with BACnet IP
BM with BACnet MS/TP (only with control function MA)
11 Air quality sensor
Only with control function MA
No entry: without air quality sensor
C with CO2 sensor
V with VOC sensor
12 Supply air temperature sensor
Z with supply air temperature sensor
13 Outdoor air temperature sensor
Only with control function MA
No entry: without outdoor air temperature sensor
A with outdoor air temperature sensor
Order example: SA-B-HV-EH-16-KO/2100×740×403/0/C3-MA-T/MR/C/Z/A
| Type | SA-B | horizontal decentralised sill ventilation unit X-CUBE/SCHOOLAIR-B |
| Variant | HV | high volume flow and rotary heat recovery unit |
| Heat exchanger | EH | with electric air heater |
| Heat exchanger construction | 16 | 1650 W |
| Construction | KO | without condensate drain |
| Nominal size [mm] | 2100×740×403 | Width 2100, height 740, depth 403 |
| Control system | C3 | with FSL-CONTROL III |
| Control function | MA | Master |
| Real time clock | T | with real time clock |
| Interface | MR | with Modbus RTU |
| Air quality sensor | C | with CO2 sensor |
| Supply air temperature sensor | Z | with supply air temperature sensor |
| Outdoor air temperature sensor | A | with outdoor air temperature sensor |
