FSL-B-ZAB/SEK
Ready-to-operate decentralised ventilation unit that provides good comfort levels, used for the ventilation and extract ventilation of rooms
Optional equipment and accessories
Application
Special characteristics
Nominal sizes
Construction
Useful additions
Construction features
Materials and surfaces
Standards and guidelines
Maintenance
Functional description
Decentralised supply and extract air units for room ventilation and for dissipating cooling loads and heat loads.
An EC centrifugal fan takes in the fresh air which then flows through the motorised shut-off damper, the volume flow controller and the F7 filter.
Once the fresh air has passed the fan, it flows through the recuperative heat exchanger for heat recovery; it is possible to bypass the recuperative heat exchanger in order to protect it, or when it is sensible with regard 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 a G3 filter, then flows through the heat exchanger (for heat recovery), the extract air fan and the motorised shut-off damper before it is discharged to the outside as exhaust air.
Automatic switching to secondary air mode (only with an air quality sensor) if the room air quality is sufficient.
The fresh air damper closes, the self-powered secondary air damper opens and the extract air fan is switched off.
The unit always starts in secondary air mode, which is more energy efficient.
Width | 1085 mm |
Height | 630 mm |
Depth | 320 mm |
Fresh air flow rate | Up to 150 m³/h |
Supply air flow rate | Up to 150 m³/h |
Cooling capacity | Up to 690 W |
Heating capacity | Up to 2600 W |
Room cooling capacity | Up to 400 W |
Room heating capacity | Up to 1000 W |
Max. operating pressure, water side | 6 bar |
Max. operating temperature | 75 °C |
Sound power level | 31 – 43 dB(A) |
Supply voltage | 230 V AC ±10 %, 50/60 Hz |
FSL-B-ZAB/SEK (sizing examples)
Supply air flow rate | m³/h | 80 | 100 | 120 |
Fresh air flow rate | m³/h | 80 | 100 | 120 |
Total cooling capacity | W | 360 | 460 | 550 |
Room cooling capacity | W | 216 | 271 | 329 |
Temperature of the air in the unit | °C | 32.0 | 32.0 | 32.0 |
Relative humidity | % | 40.0 | 40.0 | 40.0 |
Water content of the dry air | g/kg | 11.9 | 11.9 | 11.9 |
Supply air temperature | °C | 17.9 | 17.9 | 17.8 |
Condensation | g/h | 0 | 0 | 0 |
Chilled water flow rate | l/h | 100 | 130 | 170 |
Water temperature, inlet | °C | 16 | 16 | 16 |
Water temperature, outlet | °C | 19.1 | 19.0 | 18.8 |
Pressure drop – water side | kPa | <3 | <3 | <3 |
Total heating capacity | W | 1500 | 1830 | 2140 |
Room heating capacity | W | 446 | 521 | 573 |
Temperature of the air in the unit | °C | –12.0 | –12.0 | –12.0 |
Supply air temperature | °C | 37.7 | 36.6 | 35.3 |
Hot water flow rate | l/h | 90 | 130 | 170 |
Water temperature, inlet | °C | 60 | 60 | 60 |
Water temperature, outlet | °C | 45.4 | 47.7 | 49.0 |
Pressure drop – water side | kPa | <3 | <3 | <3 |
Sound power level LWA | dB(A) | 30 | 34 | 38 |
Sound pressure level with 8 dB system attenuation | dB(A) | 22 | 26 | 30 |
Decentralised supply and extract air units of Type FSL-B-ZAB/SEK, with heat recovery and heat exchanger, for installation under the sill or on the façade system.
Special characteristics
Materials and surfaces
Construction
Technical data
Sizing data
Fresh air
Supply air
Room cooling capacity
Room heating capacity
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Decentralised ventilation units are technically advanced products of high quality; they offer a wide range of configuration options. For specification details regarding your project please contact your nearest TROX branch or subsidiary.
Installation and commissioning
LN [mm]
Nominal length
LWA [dB(A)]
Sound power level
tPr [°C]
Primary air temperature
tWV [C°]
Water flow temperature – cooling/heating
tR [C°]
Room temperature
tR [C°]
Room temperature
tAN [C°]
Secondary air intake temperature
QPr [W]
Thermal output – primary air
Qtot [W]
Thermal output – total
QW [W]
Thermal output – water side, cooling/heating
VPr [l/s]
Primary air volume flow rate
VPr [m³/h]
Primary air volume flow rate
VW [l/h]
Water flow rate – cooling/heating
V [l/h]
Volume flow rate
∆tW [K]
Temperature difference – water
∆pW [kPa]
Pressure drop, water side
∆pt [Pa]
Total pressure drop, air side
∆tPr = tPr - tR [K]
Difference between primary air temperature and room temperature
∆tRWV = tWV - tR [K]
Difference between water flow temperature and room temperature
∆tWm-Ref [K]
Difference between mean water temperature and reference temperature
LN [mm]
Nominal length
Inducing displacement flow
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 such 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 fresh air from the pool to rise and create comfortable conditions in the occupied zone.
Heat exchanger
The maximum water-side operating pressure for all heat exchangers is 6 bar.
The maximum water flow temperature (heating circuit) for all heat exchangers is 75 °C; if flexible hoses are used, the water flow temperature should not exceed 55 °C. Units for other pressures and temperatures are available on request.
The water flow temperature (cooling circuit) should be at least 16 °C such that it does not permanently fall below the dew point. For units with a condensate drip tray the water flow temperature may be reduced to 15 °C.
Heat exchanger as 2-pipe system
Air-water systems with a 2-pipe heat exchanger may be used for either heating or cooling. In changeover mode it is possible to use all units within a water circuit exclusively for cooling in summer and exclusively for heating in winter.
Heat exchanger as 4-pipe system
Air-water systems with a 4-pipe heat exchanger may be used for both heating and cooling. Depending on the season, i.e. especially in spring and autumn, it may be possible that an office has to be heated in the morning and cooled in the afternoon.
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Onze afdeling voor service-aanvragen zal op korte termijn contact met u opnemen.
Voor algemene vragen over producten en diensten kunt u ons ook bereiken op:
Tel.: +32 (0) 2/522 07 80
Contact
Wij zijn er om u te helpen.
Wilt u het onderwerp van uw aanvraag en uw contactgegevens specificeren a.u.b.
Tel.: +32 (0) 2/522 07 80
Contact
Bedankt voor uw bericht!
Uw aanvraag is door ons ontvangen en wordt behandeld.
Onze afdeling voor service-aanvragen zal op korte termijn contact met u opnemen.
Voor algemene vragen over producten en diensten kunt u ons ook bereiken op:
Tel.: +32 (0) 2/522 07 80
Type
Heat exchanger
Condensate drip tray
Dimensions [mm]
Control equipment
Real time clock
Interface
Air quality sensor
Supply air temperature sensor
Fresh air temperature sensor
Heating valve
kVS value – heating valve
Cooling valve
kVS value – cooling valve
