Application
Special characteristics
Nominal sizes
Variants
Construction
Accessories
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 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 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 (that protects the unit), 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.
If the room air quality is good, the unit can be operated in secondary mode only.
Width | 1590 mm SCHOOLAIR-B, 2090 mm SCHOOLAIR-B-HE |
Height | 650 mm SCHOOLAIR-B, 750 mm SCHOOLAIR-B-HE |
Depth | 420 mm |
Volume flow rate | 150, 200, 250 m³/h (boost: 320 m³/h) with SCHOOLAIR-B |
Volume flow rate | 150, 225, 300 m³/h (boost: 400 m³/h) with SCHOOLAIR-B-HE |
Cooling capacity | Up to 1750 W |
Heating capacity | Up to 6500 W |
Room cooling capacity | Up to 1000 W |
Room heating capacity | Up to 1700 W |
Sound power level | 32 – 49 dB(A) (depending on variant) |
Max. operating pressure, water side | 6 bar |
Max. operating temperature | 75 °C |
Supply voltage | 230 V AC ±10%; 50/60 Hz |
Weight | 70 kg (SCHOOLAIR-B), 125 kg (SCHOOLAIR-B-HE) |
SCHOOLAIR-B (sizing examples)
Supply air flow rate | m³/h | 150 | 200 | 250 | 320 |
Fresh air flow rate | m³/h | 150 | 200 | 250 | 320 |
Total cooling capacity | W | 687 | 913 | 1130 | 1390 |
Room cooling capacity | W | 401 | 534 | 668 | 791 |
Temperature of the air in the unit | °C | 32 | 32 | 32 | 32 |
Rel. 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 | 18 | 18 | 18.6 |
Condensation | g/h | 0 | 0 | 0 | 0 |
Chilled water flow rate | l/h | 90 | 150 | 220 | 250 |
Water temperature, inlet | °C | 16 | 16 | 16 | 16 |
Water temperature, outlet | °C | 22.6 | 21.2 | 20.4 | 20.8 |
Pressure drop – water side | kPa | <3 | <3 | <3 | <5 |
Total heating capacity | W | 2910 | 3780 | 4660 | 5810 |
Room heating capacity | W | 972 | 1202 | 1445 | 1721 |
Temperature of the air in the unit | °C | –12 | –12 | –12 | –12 |
Supply air temperature | °C | 39.4 | 38.0 | 37.3 | 36.1 |
Hot water flow rate | l/h | 70 | 100 | 140 | 200 |
Water temperature, inlet | °C | 60 | 60 | 60 | 60 |
Water temperature, outlet | °C | 24 | 27.3 | 31.2 | 34.8 |
Pressure drop – water side | kPa | <3 | <3 | <3 | <5 |
Sound power level LWA | dB(A) | 29 | 34 | 38 | 43 |
Sound pressure level with 8 dB system attenuation | dB(A) | 21 | 26 | 30 | 35 |
SCHOOLAIR-B-HE (sizing examples)
Supply air flow rate | m³/h | 150 | 225 | 300 | 400 |
Heating capacity (without heat recovery) | W | 2920 | 4060 | 5310 | 6530 |
Internal heating capacity | W | 927 | 1105 | 1383 | 1363 |
Temperature of the air in the unit | °C | -12 | -12 | -12 | -12 |
Supply air temperature | °C | 39.5 | 35.7 | 34.8 | 31.2 |
Hot water flow rate | l/h | 80 | 120 | 200 | 250 |
Water temperature, inlet | °C | 60 | 60 | 60 | 60 |
Water temperature, outlet | °C | 28.4 | 30.7 | 37.0 | 37.3 |
Pressure drop – water side | kPa | <3 | <4 | <15 | <22 |
Sound power level LWA | dB(A) | 33 | 40 | 44 | 49 |
Sound pressure level with 8 dB system attenuation | dB(A) | 25 | 32 | 36 | 41 |
Decentralised ventilation unit with supply and extract air function, with heat exchanger and heat recovery, secondary air option (based on air quality), for installation under a sill.
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
4 side fixing brackets (supplied separately) for screwing in to the wall or ceiling slab, alternatively 2 fixing points can be used on the top of the device
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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Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265