SCHOOLAIR-D

Tested to VDI 6022

Conforms to VDI 6022

Plate heat exchanger

Cross flow heat recovery unit

Water connection

Water connections

Control equipment box

Supply air slot

Detail of supply air slot

X-CUBE SCHOOLAIR-D

SUPPLY AND EXTRACT AIR UNIT WITH SWITCHOVER OPTION FOR SECONDARY AIR OPERATION, INCLUDING CROSS FLOW HEAT RECOVERY UNIT AND HEAT EXCHANGER FOR INSTALLATION UNDER THE CEILING

Ready-to-operate decentralised ventilation unit that provides good comfort levels andis used for the ventilation of internal spaces such as classrooms, conference rooms and day nurseries

Flush ceiling installation
Acoustically optimised EC fans with low specific fan power, SFP = 0 to EN 16798-3
Cross flow heat recovery unit (heat recovery efficiency 54 %)
Highly efficient heat exchanger for heating and cooling
Heat exchanger connections are on the left when seen from the room
Reduction of fine dust and pollen contamination due to integral filters according to VDI 6022 – outdoor air filter ISO ePM1 65%
Easy filter change, no tools required
Motorised shut-off dampers, normally closed (NC)
Installation without interruption of school operations

Optional equipment and accessories

Modular control system FSL-CONTROL III, specially for decentralised ventilation systems

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

1 Fixing bracket for fixing the unit to the ceiling and wall

2 Equipment casing

3 Water connections

4 2-pipe or 4-pipe heat exchanger (optional)

5 Height-adjustable frame

6 Ceiling plate

7 Supply air slot diffuser

8 Extract air slot diffuser

9 Seal

10 Fresh air temperature sensor (optional)

11 Cable glands (master unit only; for wiring by others)

12 External control equipment box

13 Controls, inspection access panel

14 Network connections

15 Supply voltage connecting cable

SEH Single room exhaust air

SET Single room extract air

SRO Single room outdoor air

SRS Single room supply air

SEC secondary air (optional)

Functional description

Decentralised supply and extract air units ventilate the room and cover the cooling and heating load according to the technical data. An EC centrifugal fan takes in the outdoor air, which then flows through the motorised shut-off damper and the outdoor air filter. The outdoor air then flows through the cross flow heat recovery unit and it can be switched off when it is sensible with regard to energy efficiency. If necessary, the supply air is heated or cooled near the ceiling by the heat exchanger before it is discharged to the room as a displacement flow (optional in the case of 4-pipe systems). The extract air first passes through the extract air filter, then flows through the heat recovery unit, the extract air fan and the motorised shut-off damper before it is discharged to the outside as exhaust air. If the indoor air quality is sufficient, FSL-CONTROL III closes the outdoor air dampers and changes to secondary air operation, which is more energy efficient in any case. Here, the control system compares the setpoint values of the indoor air quality with the actual values measured at the CO2 sensor and switches automatically between outdoor air and secondary air operation. If the power fails, the outdoor air and exhaust air dampers are closed to ensure fire protection and frost protection and to avoid draughts. This is ensured by a capacitor in each actuator. The supply air is discharged near the ceiling with a medium velocity. The Coanda effect deflects the air jet upwards, where it remains attached to the underside of the ceiling, thereby increasing the throw distance. Once it has reached the wall, which is located opposite the air outlet, an air curtain is created. The supply air reaching the occupied zone has a very low airflow velocity and flows strongly at heat sources (e.g. people and devices), thus giving rise to natural convection. As a result, the air is primarily exchanged in these areas. The consumed air rises before it is extracted into the device directly under the ceiling and then released outside.

Width	1640 mm
Height	400 mm
Depth	800 mm
Volume flow rate	150, 200, 250 m³/h (boost 300 m³/h)
Nominal volume flow rate	250 m³/h
Sound power level	32 – 47 dB(A)
Heat recovery efficiency	54 %
Maximum operating pressure, water side	6 bar
Maximum operating temperature	75 °C
Supply voltage	230 V AC ±10 %, 50/60 Hz
Power rating	197 VA
Weight	100 kg

X-CUBE/SCHOOLAIR-D (example 2-pipe version, active heating)

Supply air flow rate	m³/h	150	200	250	300
Total heating capacity	W	2570	3420	4290	5100
Room heating capacity	W	757	1002	1271	1469
Air temperature inside the unit	°C	-12	-12	-12	-12
Supply air temperature	°C	33.4	33.3	33.5	33.0
Hot water flow rate	l/h	60	90	130	170
Water temperature, inlet	°C	50	50	50	50
Water temperature, outlet	°C	12.7	16.9	21.3	23.9
Water side pressure drop	kPa	3.4	7.0	13.5	21.6
Sound power level L_WA	dB(A)	32	38	43	47
Sound pressure level including 8 dB system attenuation	dB(A)	24	30	35	39
Active power P_el	W	26	36	53	72

Air-side data Heating mode:

Temperature/relative humidity outdoor air: -12 °C/90 %
Temperature/relative humidity indoor air: 20 °C/35 %

X-CUBE/SCHOOLAIR-D (example 2-pipe version – isothermal supply air)

Supply air flow rate	m³/h	150	200	250	300
Total heating capacity	W	1890	2480	3100	3740
Room heating capacity	W	79	60	85	113
Air temperature inside the unit	°C	-12	-12	-12	-12
Supply air temperature	°C	21.4	20.8	20.9	21.0
Hot water flow rate	l/h	40	55	75	100
Water temperature, inlet	°C	50	50	50	50
Water temperature, outlet	°C	8.8	10.8	14.0	17.4
Water side pressure drop	kPa	1.1	2.0	3.4	5.7
Sound power level L_WA	dB(A)	32	38	43	47
Sound pressure level including 8 dB system attenuation	dB(A)	24	30	35	39
Active power P_el	dB(A)	26	36	53	72

Air-side data Heating mode:

Temperature/relative humidity outdoor air: -12 °C/90 %
Temperature/relative humidity indoor air: 20 °C/35 %

X-CUBE/SCHOOLAIR-D (example 4-pipe version)

Supply air flow rate	m³/h	150	200	250	300
Total cooling capacity	W	680	910	1070	1290
Room cooling capacity	W	391	528	593	721
Air temperature inside the unit	°C	32	32	32	32
Relative humidity	%	40	40	40	40
Water content of the dry air	g/kg	11.9	11.9	11.9	11.9
Supply air temperature	°C	18.2	18.1	18.9	18.8
Condensation	g/h	0	0	0	0
Chilled water flow rate	l/h	110	150	150	200
Water temperature, inlet	°C	16	16	16	16
Water temperature, outlet	°C	21.3	21.2	22.1	21.6
Water side pressure drop	kPa	1.9	3.2	3.2	5.3
Total heating capacity	W	2880	3720	4440	5080
Room heating capacity	W	892	1089	1169	1182
Air temperature inside the unit	°C	-12	-12	-12	-12
Supply air temperature	°C	38.8	37.3	35	32.8
Hot water flow rate	l/h	100	150	180	200
Water temperature, inlet	°C	60	60	60	60
Water temperature, outlet	°C	34.9	38.4	38.5	37.9
Water side pressure drop	kPa	4.5	9.2	12.5	15.1
Sound power level L_WA	dB(A)	32	38	43	47
Sound pressure level including 8 dB system attenuation	dB(A)	24	30	35	39
Active power P_el	W	26	36	53	72

Air-side data Cooling mode:

Temperature/relative humidity outdoor air: 32 °C/40 %
Temperature/relative humidity room air: 26 °C/50 %

Air-side data Heating mode:

Temperature/relative humidity outdoor air: -12 °C/90 %
Temperature/relative humidity room air: 21 °C/30 %

SCHOOLAIR-D-0-2/1690×400×800/C3

Ventilation units for installation on the façade in the ceiling area

Please note:

The ceiling ventilation unit variant described is equipped with an integrated individual room control for independent classroom operation.

The supplied controllers contain the parameters of the standard control for self-sustaining operation according to our control description.

Ventilation unit for schools – ceiling installation – master unit

TROX X-CUBE/SCHOOLAIR-D ventilation unit for ceiling installation, for supply and extract air function, and switchover option to secondary air mode (depending on room air quality), heat recovery and heating function for installation in the ceiling area:

Unit casing made of galvanised sheet steel, cover and sheet metal connections with deep-drawn threads and stainless steel cross-head screws, all required internal air ducts sealed and lined, 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 (building material class A, non-combustible as per DIN 4102, T1), abrasion-resistant up to air velocities of 20 m/s, or closed cell insulation material
The unit meets the hygiene requirements of VDI 6022
Brackets with slotted holes (60 × 20 mm) on both sides, for fixing the unit to the ceiling
Connection to the on-site outdoor air and exhaust air openings on the existing façade with circumferential closed-pore sealing tape on the back of the device, d = 10 mm. The suction and discharge resistance of the on-site construction should not exceed 20 Pa at nominal volume flow rate
2 energy-saving EC centrifugal fans, supply and extract air fans classified as SFP 0 (< 300 W/(m³/s)) as per EN 16798-3:2017-11, electrical power consumption of the entire unit 250 m³/h <53 W at the nominal volume flow rate; the connecting cable has to be suitable for a power rating of 197 VA
Suitable for 3 speed levels (150, 200 and 250 m³/h as well as boost level of 300 m³/h), signalling via integrated single room control system. The volume flow rate can be corrected at a later stage by adjusting the control voltage
The technical requirements of EU directive 1253/2014 for non-residential ventilation systems are fulfilled and documented in accordance with the directive
Air discharge and intake of room supply and extract air on the underside of the unit via PURELINE 50-2 slot diffusers (natural anodised aluminium), including specially adapted magnetic cover secured by concealed screw fixing (RAL 9010). Cover secured against falling by safety cables. The ceiling tiles adjacent to the ventilation unit have to be removable for inspection and maintenance of the unit.
Project-specific integrated heat revorery unit, recuperative, salt water resistant aluminium design, highly efficient thanks to special plate structure, plate spacing and package length, including condensate drip tray
With electromotive bypass that allows a large partial air volume flow to bypass the heat recovery, 24 V actuator (modulating), signalling via integrated single room control system
Motorised shut-off dampers in the outdoor air and exhaust air ducts, normally closed when there is no power (energy storage), 230 V open/close actuator, signalling with integrated single room control system
Automatic switching to secondary air mode (only with an air quality sensor) if the room air quality (measured with the integral 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
Integrated electrical components are connected to FSL-CONTROL III; the control components are arranged in a control equipment box to be mounted separately, connection cable approx. 5 m long. Cable for on-site connection (connection not in the TROX supply package) of the power supply (L, N, PE) with wire end ferrules, led approx. 1 m out of the unit, as a transfer point to the on-site electrical installation:
- Supply voltage (230 V): 3 wires, 3 × 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 into MCE/BACS via RS485 (Modbus/BACnet)
  - 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, removable for cleaning, also drainage and venting option in the heating circuit. We recommend flexible hoses (not part of the supply package) to connect the unit to the on-site pipe network, as they simplify removal of the heat exchanger for cleaning
The transfer point of the heat exchanger are the union nuts to which the control components (valve including actuator in the flow, lockshield in the return) are pre-assembled hand-tight
Easy-to-clean condensate drip tray made of galvanised sheet steel, powder-coated RAL 9005, without condensate drain
Outdoor air filter as Mini Pleat filter, class ePM1 (fine dust filter):
- Filter class as per ISO 16890: ISO ePM1 65%
- Eurovent-certified
- ePM1 filter media are made of high-quality, wet-strength glass fibre paper and laid in tight pleats. The spacers are made of thermoplastic hot melt adhesive to ensure uniform spacing (4mm) 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 ≥ 2.2 m²
For extract air, filter media as an additional protection of the components
Internal components can be accessed after removing the separate maintenance cover with the slot diffusers (screw-fixed and also secured with magnets and safety cables). The unit must be freely accessible from below.
The supply air is drawn in and extract air is removed via the integrated slot diffusers

Units - dimensions and weight:

Width: approx. 1640 mm (including fixing brackets)
Height: minimum 400 mm (with additional adjustment option of approx. +29 mm)
Depth: approx. 800 mm (without seals)
Weight: approx. 100 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

CO₂sensor (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 GmbH, 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 GmbH, 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 GmbH, 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 GmbH, 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

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

<ParaStyle:2:ExcelTable:1spaltig:TableCaption>
SA-D	–		–	0	–	4	–	1	–	BB	–	W	/	1640 × 400 × 800	/	0	/	C3	–	MA	–	T	/	MR	/	C	/	Z	/	A	/	HV	–	R	–	0,40	/	KV	–	R	–	0,40
\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|		\|
1		2		3		4		5		6		7		8		9		10		11		12		13		14		15		16		17		18		19		20		21		22

1 Type
SA-D Ventilation unit for ceiling installation X-CUBE/SCHOOLAIR-D

2 Variant
No entry: Standard

3 Installation situation
0 Installation integrated in suspended ceiling

4 Heat exchanger
2 2-pipe
4 4-pipe

5 Heat exchanger construction
Specify construction (technical design with TROX EPF or TROX CONFIGURATOR)

6 Construction
BB (Outdoor air) connection to the rear, (exhaust air) connection to the rear

7 Connection
W Wall connection sealing kit for outdoor air and exhaust air

8 Nominal size [mm]
Width × height × depth
1640 × 400 × 800

9 Exposed surface
0 powder-coated, RAL 9010 (pure white), GU 30

10 Control system
OR without control system
C3 with FSL-CONTROL III

11 Control function
MA Master
SL Slave

12 Real time clock
Only with control function MA
No entry: without real time clock
T with real time clock

13 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)

14 Air quality sensor
Only with control function MA
No entry: without air quality sensor
C with CO₂sensor
V with VOC sensor

15 Supply air temperature sensor
Z with supply air temperature sensor

16 Outdoor air temperature sensor
Only with control function MA
No entry: without outdoor air temperature sensor
A with outdoor air temperature sensor

17 Heating valve
HV with thermoelectric actuator
HVE with electromotive actuator

18 Lockshield – heating circuit
R with lockshield

19 Kvs-value heating valve
0.25 (straight-way valve)
0.40 (straight-way valve)
0.63 (straight-way valve)
1.00 (straight-way valve)
F0.50 (pressure-independent control valve)

20 Cooling valve
Only with heat exchanger 4
KV with thermoelectric actuator
KVE with electromotive actuator

21 Lockshield cooling circuit
Only with heat exchanger 4
R with lockshield

22 kVS value cooling valve
Only with heat exchanger 4
0.25 (straight-way valve)
0.40 (straight-way valve)
0.63 (straight-way valve)
1.00 (straight-way valve)
F0.50 (pressure-independent control valve)

Order example: SA-D-0-4-1-BB-W/1640×400×800/0/C3-MA-T/MR/C/Z/A/HV-R-0.40/KV-R-0.40

Type	SA-D	Ventilation unit for ceiling installation X-CUBE/SCHOOLAIR-D
Variant	-	Standard
Installation situation	0	integrated in suspended ceiling
Heat exchanger	4	4-pipe
Heat exchanger construction	1	Heat exchanger type 1
Construction	BB	(Outdoor air) connection to the rear, (exhaust air) connection to the rear
Connection	W	Wall connection sealing kit for outdoor air and exhaust air
Nominal size [mm]	1640×400×800	Width 1640, height 400, depth 800
Exposed surface	0	powder-coated, RAL 9010 (pure white)
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 CO₂sensor
Supply air temperature sensor	Z	with supply air temperature sensor
Outdoor air temperature sensor	A	with outdoor air temperature sensor
Heating valve	HV	with thermoelectric actuator
Lockshield – heating circuit	R	with lockshield
kVS value – heating valve	0.40	0.40 (straight-way valve)
Cooling valve	KV	with thermoelectric actuator
Lockshield – cooling circuit	R	with lockshield
kVS value – cooling valve	0.40	0.40 (straight-way valve)

Product details

Installation below the ceiling slab near the façade or an external wall
The ventilation unit is fitted with two hanging brackets to screw-fix it to the façade or an external wall
Weather protection for the intake air and exhaust air openings to be provided by others
The outdoor air intake or exhaust air discharge takes place via 2 façade openings. The façade openings must be professionally provided by the customer and ideally have a slope to the outside
Free area of outdoor air openings: at least 0.031 m² per opening
Installation and connections to be performed by others. Fixing, connecting and sealing material not included
The water flow and return connections are on the left-hand side of the unit when seen from the room
The customer must ensure that the unit can be drained and vented.
The electrical connection is on the left-hand side of the unit when seen from the room
The single room control system FSL-CONTROL III (optional) comes in an control box that should be installed in such a way that it is easily accessible for inspection.

Downloads

product information

Product data sheet X-CUBE SCHOOLAIR-D

SA-D_PD_2024_07_10_DE_en product data sheet 620 KB pdf
SCHOOLAIR-D_BIM 3D

170 KB zip

brochures

Brochure SCHOOLAIR TROX

AL_2022_05_School_Ventilation_DE_en_web brochure 3,6 MB pdf

certificates

Declaration of conformity or declaration of incorporation Type SCHOOLAIR-D

2021/06 Certificate 190 KB pdf
Declaration of hygiene conformity X-CUBE-SCHOOLAIR-D

X-CUBE-SCHOOLAIR-D_HC_2023_12_12_DE_en 670 KB pdf
ErP certificate SCHOOLAIR-D

Schoolair-D_ErP_2021_12_DE_en Certificate 200 KB pdf

operation manuals

Installation and configuration manual Type FSL-CONTROL II

SM_2018_04_A00000046303_FSL-CONTROL_II_V6 1,5 MB pdf
Installation and configuration manual Type FSL-CONTROL III

FSL-C_III_SM_A00000080125_V1_2020_04_GB_en 4,9 MB pdf
Installation and operating manual Schoolair-D/-HV

SA-D-xx_IOM_A00000060547_2021_10_V2_GB_en Installation and operating manual 3,1 MB pdf
Installation manual Type FSL/SCHOOLAIR

Installation manual 450 KB pdf

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SA-D

X-CUBE SCHOOLAIR-D

SUPPLY AND EXTRACT AIR UNIT WITH SWITCHOVER OPTION FOR SECONDARY AIR OPERATION, INCLUDING CROSS FLOW HEAT RECOVERY UNIT AND HEAT EXCHANGER FOR INSTALLATION UNDER THE CEILING

Technical information