FSL-B-ZAB/SEK

Inspection access panel for G3/F7 filter and heat recovery

Inspection access panel for filter and heat recovery unit

X-CUBE ROOMAIR-B-ZAB/SEK

Supply and extract air unit with heat exchanger and heat recovery unit, secondary air option, for installation under the sill

Ready-to-operate decentralised ventilation unit that provides good comfort levels, used for the ventilation of internal spaces

Acoustically optimised EC fans with low specific fan power, SFP = 0 to EN 16798-3
Cross flow heat recovery unit (heat recovery efficiency 60 %)
Highly efficient heat exchanger for heating and cooling as 2-pipe or 4-pipe system
Heat exchanger connection is on the right when seen from the room
Condensate drip tray with condensate drain (on the right when seen from the room)
Heat recovery all year round (condensate drainage by others)
Reduced fine dust and pollen contamination due to integral filters that conform to VDI 6022 – filter class ISO ePM1 65 % / ISO coarse 85 %
Inspection access panel simplifies filter change and cleaning of the heat exchanger
Motorised shut-off dampers, normally closed (NC)
Automatic switching to secondary air mode (based on air quality)

Optional equipment and accessories

Modular control system FSL-CONTROL III, specially for decentralised ventilation systems
Various fixing systems to fix the unit to the floor or wall
Wood panelling as outer casing in various colours, with TROX ventilation grilles for supply air and extract air (assembly kit)

Technical information

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

SEH Single room exhaust air

SRO Single room outdoor air

SRS Single room supply air

SET Single room extract air

SEC Secondary air individual room

1 Outdoor air temperature sensor (optional)

2 Volume flow limiter

3 Non-return damper

4 Shut-off damper with actuator (outdoor air)

5 Fine dust filter ePM1

6 EC fan (supply air and extract air)

7 Recuperator

8 Sound attenuator

9 Heating coil

10 Cooling coil

11 Supply air temperature sensor (optional)

12 Bypass damper with actuator (modulating)

13 CO₂ sensor (optional)

14 Extract air filter ISO coarse

15 Shut-off damper with actuator (exhaust air)

Decentralised supply and extract air units ensure room ventilation. They dissipate the cooling loads and heat loads in accordance with the technical data. An EC centrifugal fan takes in the outdoor air and this then flows through the maintenancefree and mechanical self-powered type VFL volume flow limiter, which is pre-set at the factory to the maximum volume flow rate. This ensures maximum limitation of the outdoor air flow rate to a pre-set value for all façade positive pressure situations without an electrical external power supply. The air then flows through the motorised shut-off damper, the self-powered non-return damper and the outdoor air filter. The self-powered non-return dampers in the outdoor air intake and exhaust air outlet prevent the return flow of the conditioned air or undesired airflow directions. Once the outdoor air has passed the fan, it flows through the heat recovery unit; it is possible to bypass the heat exchanger in order to protect it, or when it is sensible with regar to energy efficiency. If necessary, the air is heated or cooled by the heat exchanger before it is discharged to the room as a displacement flow. The extract air first passes through the outdoor air filter, then flows through the heat recovery unit, the extract air fan, the non-return damper and the motorised shut-off damper before it is discharged to the outside as exhaust air. If the room 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. The control system compares the room air quality setpoint value to the actual value measured by 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 external wall and with a medium velocity between 1.0 and 1.5 m/s. Due to the induction effect, the supply air velocity is rapidly reduced so that, in cooling mode, the supply air displaces the room air over the entire floor area. The convection from people and other heat sources causes the outdoor air to rise and create comfortable conditions in the occupied zone.

FSL-B-ZAB/SEK-4-KM/1085x630x320/C3

Under sill units for installation horizontally on the façade Please note: The described under sill ventilation unit variant is equipped with a single room control system arranged in the unit for autonomous room operation

The supplied controllers contain the standard control parameters for operation according to our control system description.
FSL-B-ZAB/SEK with self-powered secondary air switchover function - MASTER UNITUnder sill ventilation unit TROX FSL-B- ZAB/SEK with supply and extract air function and switchover option to secondary air operation (air quality dependent), heat recovery, and heating and cooling function for installation on an external wall below the window sill

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)
Intake for extract and secondary air on the top, sheet metal edges of the intake openings are formed accordingly (without sealing tape) and can be used as an additional support for the under sill trim (trim provided by others); closed cell sealing tape is required between the unit and the trim so as to avoid any mixing of airflows (short circuit); (sealing tape not included in the TROX supply package)
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
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, b × d = 50 × 10 mm, the intake 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 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 120 m³/h <24 W, for the connecting cable a power rating of 195 VA has to be considered
Suitable for up to 5 speed levels (80 to 150 m³/h), signalling via device-internal single room control system, volume flow rate level correction by adjusting the control voltage subsequently is possible
Meets the requirements of EU directive 1253/2014 (Erp)
Sound power level in supply-extract air operation at 80/100/120m³/h = 30/34/38 dB(A) (corresponds to a sound pressure level of = 22/26/30 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. Depending on the installation situation, deviations are possible
Integral recuperative cross flow heat exchanger for heat recovery in a salt water resistant aluminium design, with high efficiency due to special plate structure, plate spacing and package length, including condensate drip tray. A separate service opening allows for maintenance without removing the top of the unit casing
With electromotive bypass which allows the volume flow to bypass the heat recovery, actuator 24 V (modulating), 100 % open – closed, signalling via device-internal single room control system FSL-CONTROL III
Self-powered non-return dampers in the outdoor/exhaust air area that are integrated into the locking devices for outdoor air and exhaust air can be hinged down, and these prevent a return flow of conditioned air or undesired airflow directions when the shutoff damper device is opened and closed
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
Integral mechanical self-powered volume flow limiter type VFL, maintenance-free, pre-set to a maximum volume flow rate, without electrical external power supply for maximum limiting of the outdoor air flow rate to a pre-set value for all façade positive pressure situations. The VFL consists of the control component with setpoint value adjustment and control mechanics. Control by mechanical self-powerd damper blade. Control spring and low-friction, silicone-free cushioning element, any installation orientation and maintenance-free, high control accuracy of ±10 %, referring to the maximum in the pressure range of between 30 and 300 Pa
Automatic switching to secondary air mode (only with an airquality sensor) if the indoor air quality (measured, for example, with the integral CO2 sensor) is within the limits defined beforehand. The outdoor air damper closes, the self- powered 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. Cable for connection (connection is not part of the 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 electrical installation provided by others:
- Supply voltage (230 V): 3 wires, 3 x 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
4-pipe aluminium cooper tube heat exchanger for air heating or air cooling, 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/cooling circuit, on the right when seen from the room. We recommend a connection to the pipe network (provided by others) with flexible hoses (not included in 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 made from galvanised sheet steel, powder-coated RAL 9005, with condensate drain Ø 12 x 1 [mm]
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, wet- strengthened 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 of moisture-resistant non-woven fibre, with lugs (for pulling it out) and must not reduce the flow cross section (filter size = flow cross section).
- Filter area >= 1.6 m²
Extract air filter (coarse dust filter) as flat filter medium, filter class according to ISO16890: ISO Coarse 55 %
Quick change of the filters is possible, since the filter insert can be opened without tools after opening the casing that is provided by others via user-friendly quarter-turn fasteners (accessibility must not be restricted by the under sill trim that is provided by others)
Possibility of supporting a window sill provided by the customer, intake of the extract air below the window sill is on the top of the unit
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 others (supply package by TROX possible on request) is to be perforated in areas of the radiator to be specified for the introduction of supply air into the room and must not restrict maintenance work and 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 suction
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 device must be completely accessible after disassembly of the outer casing

Units, dimensions and weight:

Width: approx. 1085 mm (including fixing brackets)
Height: approx. 630 mm (without seal for window sill,without condensate drain, without levelling feet)
Depth: approx. 320 mm (without compressible façade seal on the back of the unit)

Weight: approx. 65 kg

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 andStandby) 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) (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 (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 (order code .../Z/...):

Supply air temperature sensor with NTC thermistor, 10 kΩ at25 °C, measuring range -35 to 105 °C
Very short response time due to perforated measuring tip

Outdoor air temperature sensor (order code .../A/...):

Outdoor air temperature sensor with NTC thermistor, 10 kΩat 25 °C, measuring range -35 to 105 °C

Water-side components (order code…/HV-R-…/KV-R-…):
Valve actuators:

2 × thermoelectric actuators for opening and closing valves, with position indicator, including pluggable connection power, operating voltage 24 V DC, control voltage 0 - 10 V DC, power consumption 1 W, protection class: IP 54

Straight-way valves:

2 × straight through small valves ½" standard, hand-tight pre- assembled, PN 16, DN 10, kvs 0.4 (alternatively 0.25, 0.63 or 1.0 m³/h - please state the required kvs-Value), valve body straight through with external thread on both sides ½" flat sealing, medium temperature 1 - 110 °C

Lockshields:

2 × return fittings on both sides ½", hand-tight pre-assembled, nominal width DN 15; valve body straight through with external thread on both sides ½" flat sealing, for regulation and shut-off, media temperature max. 120 °C

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 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 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. Protection level: 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 to70 °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 mmRoom temperature sensor for surface mounting

Room temperature sensor TROX RTF, surface mounting:

Supplied loosely as a separate part, room sensor without operating elements, measuring range: -35 to 70 °C, NTC 10 kΩ sensor, screw terminal connection terminal, cable cross- section 1.5 mm2, protection level IP 20, mounting on wall or on 70 mm flush-mounted box, dimensions (B × H × T) 85 × 85 × 30 mm, ABS casing in RAL 9010Control panels without selector switch for flush mounting: Manual operation of the ventilation units, high-quality appearance, matching design frames from various switch ranges. The units are particularly suitable for design-oriented interiors.

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 from Busch Jäger future linear range, 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 andpush button, NTC sensor 20 kΩ, protection level: IP 20
Other switch programmes on request

Electromotive valve actuators as an alternative to the thermoelectric actuators installed as standard:

2 x electromotive actuators for opening and closing valves, supply voltage AC/DC 24 V, maximum power consumption2.5 VA, signalling of control signal 3-point DC 0 – 10 V,permitted operating fluid temperature 1 to 110 °C

Pressure-independent control valves as an alternative to the small straight-way valves installed as standard:

2 x pressure-independent control valves, hand-tight pre- assembled with modulating open/close control in combination with an externally adjustable dynamic volume flow controller, with full valve authority, nominal width DN 10, straight- through valve body with external 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

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

RA-B-ZAB/SEK

–

1124 × 763 × 320

–

0.4

–

0.4

1 Type
RA-B-ZAB/SEK horizontal decentralised sill ventilation unit XCUBE/ROOMAIR-B-ZAB/SEK

2 Heat exchanger
2 2-pipe
4 4-pipe

3 Variant
No entry: Standard
HE high degree of heat recovery

4 Construction
KR with condensate drain on the right

KL with condensate drain on the left (only with variant HE)

5 Dimensions [mm]
Width × height × depth

1085 × 630 × 320 (only with standard variant)
1124 × 763 × 320 (only with variant HE and version KR)

1174 × 763 × 320 (only with variant HE and version KL)

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

7 Control function
MA Master
SL Slave

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

9 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)

10 Air quality sensor
Only with control function MA
No entry: without air quality sensor
C with CO₂-sensor
V with VOC sensor

11 Supply air temperature sensor
Z with supply air temperature sensor

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

13 Heating valve
HV with heating valve

14 Lockshield – heating circuit
R with lockshield

15 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

16 Cooling valve
With heat exchanger '4' only
KV with cooling valve

17 Lockshield – cooling circuit
R with lockshield

18 kVS value – cooling 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

Order example: FSL-B-ZAB/SEK-4-KM/1085x630x320/C3-MA-T/C/Z/A/HV-R-0.40/KV-R-0.25

FSL-B-ZAB/SEK	Horizontal under sill unit
4	With 4-pipe heat exchanger
KM	With condensate drain
C3	With FSL-CONTROL III
MA	Master
T	With real time clock
C	With CO₂sensor
Z	With supply air temperature sensor
A	With outdoor air temperature sensor
HV-R-0.40	With straight-way valve (heating circuit) K_VS 0.40 and lockshield
KV-R-0.25	With straight-way valve (cooling circuit) K_VS 0.25 and lockshield

Product details

Under sill installation either standing on the floor or hanging on an external wall
Level adjustment using the 4 levelling feet (+40 mm)
The outdoor air connection is provided by two ventilation openings in the façade system or external wall (to be provided by others)
Weather protection for the outdoor air and exhaust air openings to be provided by others

Installation and connections to be performed by others; fixing, connection and sealing material to be provided by others
The water flow and return connections are on the right-hand side of the unit when seen from the room
Vents and drainage by others
We recommend using flexible hoses to connect the unit to the pipework as they facilitate removing the

heat exchanger for cleaning
The under sill trim provided by others must not obstruct installation or deinstallation of the unit or maintenance access on the front of the unit

Downloads

product information

Product data sheet RA-B-ZAB/SEK

RA-B-ZAB-SEK_PD_2024_01_31_DE_en Product data sheet 11 MB pdf

certificates

ERP-Product information RA-B-ZAB/SEK

X-CUBE-ROOMAIR-B-ZAB-SEK_ErP_2025_02_DE_en 280 KB pdf
Energy Label Type FSL-B-ZAB/SEK

Energy Label 500 KB pdf
Declaration of Conformity

X-CUBE-ROOMAIR-B-ZAB-SEK_CE_DoC_2024_10_DE_en Declaration of Conformity 660 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 operating manual Serie FSL-B und Schoolair-B

FSL-B_Schoolair-B-x_IOM_2020_07_A00000080773_V1_GB_en Installation and operating manual 6,6 MB pdf
Installation and operating manual ROOMAIR-B-ZAB/SEK

RA-B-ZAB_SEK_IOM_CD10070_V1_2025_05_GB_en Installation and operating manual 5,6 MB pdf

References

Installation example FSL-B-ZAB

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Supply air flow rate	m³/h	80	100	120	150
Total cooling capacity	W	370	460	550	670
Room cooling capacity	W	214	267	321	386
Air temperature inside the unit	°C	32.0	32.0	32.0	32.0
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	18.0	18.0	18.0	18.3
Condensate	g/h	0	0	0	0
Chilled water flow rate	l/h	90	115	160	200
Water temperature, inlet	°C	16	16	16	16
Water temperature, outlet	°C	19.5	19.4	19.0	18.9
Water side pressure drop	kPa	3.0	4.0	7.5	11.0
Total heating capacity	W	1370	1720	2060	2440
Room heating capacity	W	326	421	501	506
Air temperature inside the unit	°C	-12.0	-12.0	-12.0	-12.0
Supply air temperature	°C	33.2	33.6	33.5	31.1
Hot water flow rate	l/h	50	80	120	145
Water temperature, inlet	°C	60	60	60	60
Water temperature, outlet	°C	36.2	41.2	45.0	45.3
Water side pressure drop	kPa	2.5	5.5	11.0	15.0
Sound power level LWA	dB(A)	30	34	38	43
Sound pressure level with 8 dB system attenuation	dB(A)	22	26	30	35
Active power Pel	W	19	23	24	34

Supply air flow rate	m³/h	80	100	120	150
Total cooling capacity	W	420	520	640	800
Room cooling capacity	W	216	267	321	406
Heat recovery efficiency	%	63	61	60	56
Air temperature after heat recovery	°C	29.4	29.5	29.6	29.7
Relative humidity	%	46.3	46.0	46.0	45.6
Water content of the dry air	g/kg	11.9	11.9	11.9	11.9
Supply air temperature	°C	17.9	18.0	18.0	17.9
Condensate	g/h	177	207	266	324
Chilled water flow rate	l/h	50	68	80	105
Water temperature, inlet	°C	8	8	8	8
Water temperature, outlet	°C	15.2	14.6	14.8	14.5
Water side pressure drop	kPa	1.5	2.0	2.7	4.5
Total heating capacity	W	770	960	1200	1560
Room heating capacity	W	329	404	481	571
Thermal efficiency	%	61	60	57	54

Width	1085 mm
Height	630 mm
Depth	320 mm
Outdoor air flow rate	80 – 150 m³/h
Nominal volume flow rate	120 m³/h
Sound power level	30 – 43 dB(A)
Heat recovery efficiency	60 %
Max. operating pressure, water side	6 bar
Max. operating temperature	75 °C
Supply voltage	230 V AC ±10 %, 50/60 Hz
Power rating	234 VA
Weight	65 kg

Air temperature after heat recovery	°C	6.1	5.9	4.8	3.3
Supply air temperature	°C	33.3	33.1	33.0	32.4
Condensate	g/h	200	200	200	200
Hot water flow rate	l/h	55	75	110	180
Water temperature, inlet	°C	50	50	50	50
Water temperature, outlet	°C	37.8	38.9	40.5	42.5
Water side pressure drop	kPa	0.5	1	1.5	3.3
Sound power level LWA	dB(A)	30	34	38	43
Sound pressure level with 8 dB system attenuation	dB(A)	22	26	30	35
Active power Pel	W	19	23	24	34

X-CUBE ROOMAIR-B-ZAB/SEK

Supply and extract air unit with heat exchanger and heat recovery unit, secondary air option, for installation under the sill

Technical information

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

Product details

Downloads

product information

Product data sheet RA-B-ZAB/SEK

certificates

ERP-Product information RA-B-ZAB/SEK

Energy Label Type FSL-B-ZAB/SEK

Declaration of Conformity

operation manuals

Installation and configuration manual Type FSL-CONTROL II

Installation and operating manual Serie FSL-B und Schoolair-B

Installation and operating manual ROOMAIR-B-ZAB/SEK

References

Installation example FSL-B-ZAB

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