SCHOOLAIR-V

SCHOOLAIR-V-1800

Tested to VDI 6022

Levelling foot

SCHOOLAIR-V, Filter

Cross counter flow heat recovery unit

SCHOOLAIR-V

Supply and extract air unit with heat exchanger and heat recovery unit, secondary air option, for vertical installation on an external wall, e.g. adjacent to a window

Ready-to-operate decentralised ventilation unit that provides good comfort levels, used for the ventilation and extract ventilation of rooms such as classrooms in schools

Acoustically optimised EC fans with low specific fan powers, SFP-1 according to EN 13779
Recuperative plate heat exchanger (air/air), including bypass damper with electric actuator (open-close)
Alternatively: Rotary heat exchanger for heat recovery (air/air), including bypass with electric actuator (modulating or open-close)
Heat exchanger for heating and cooling as 2-pipe or 4-pipe system
Unit base of approx. 0.24 m²
Easy filter change, no tools required
Condensate drip tray with or without condensate drain
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 II, specially for decentralised ventilation systems
Demand-based fresh air volume, free cooling and night purge, depending on control strategy
Variable heat recovery
Powder-coated RAL 9005 (black)

Application

Application

Ventilation and extract ventilation of rooms with a depth up to approx. 6 m
2-pipe or 4-pipe heat exchangers enable good comfort levels
Inducing displacement flow
Energy-efficient solution since water is used for heating and cooling
For new buildings, refurbishment projects and revitalisation projects
Vertical installation on the façade system or an external wall
Typical applications include classrooms in schools, playrooms in daycare facilities, meeting rooms and offices with a high air change rate

Special characteristics

Decentralised ventilation unit for high volume flow rates
Motorised shut-off dampers for fresh air and exhaust air, normally closed (NC) in order to prevent uncontrolled airflows
Demand-based ventilation and extract ventilation is possible by means of monitoring the room air quality and with dedicated control equipment
The type of heat recovery unit depends on the unit variant: cross flow plate heat exchanger, cross counter flow plate heat exchanger including bypass damper with electric actuator (open-close or modulating) or rotary heat exchanger
Heat exchanger as 2-pipe or 4-pipe system, with G½" union nuts and flat seals
Meets the hygiene requirements of VDI 6022
Filter class: F7 for fresh air, G3 for extract air
Easy filter change with quick release fasteners, no tools required
Condensate drip tray with or without condensate drain
Compact construction, hence particularly suitable for refurbishment projects
Automatic switching to secondary air mode (only with an air quality sensor) if the room air quality (measured with the integral VOC sensor, for example) is between the previously defined range. The unit always starts in secondary air mode, which is more energy efficient.
Depending on the unit, an enthalpy heat recovery unit may be used

Nominal sizes

SCHOOLAIR-V 2-pipe system: 397 × 2160 × 359 mm (B × H × T)
SCHOOLAIR-V 4-pipe system: 397 × 2350 × 359 mm (B × H × T)
SCHOOLAIR-V-1800 2-pipe system, 4-pipe system: 600 × 1800 × 359 mm (B × H × T)
SCHOOLAIR-V-HE 2-pipe system, 4-pipe system: 600 × 2000 × 408 mm (B × H × T)
SCHOOLAIR-V-HV 2-pipe system, 4-pipe system: 600 × 2200 × 408 mm (B × H × T)

Technical information

Function, TECHNICAL DATA, QUICK SIZING, Specification text, Order code, Related products

Schematic illustration of SCHOOLAIR-V

① Cover of G3 coarse dust filter chamber
② Cover of F7 fine dust filter chamber
③ Casing
④ Cover of control equipment
⑤ Heat exchanger
⑥ Supply air temperature sensor (optional)
⑦ Fresh air opening with fresh air temperature sensor (optional)
⑧ Exhaust air opening
⑨ Mounting bracket (sliding)
⑩ Extract air opening

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 heat recovery unit; it is possible to bypass the 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 recovery unit, 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	397 mm (2-pipe or 4-pipe), 600 mm (2-pipe or 4-pipe, 1800, HE and HV)
Height	1800 mm (2-pipe or 4-pipe, 1800 version), 2000 mm (HE version), 2160 mm (2-pipe), 2200 mm (HV version), 2350 mm (4-pipe)
Depth	359 mm (2-pipe or 4-pipe, 1800 version) 408 mm (2-pipe or 4-pipe HE and HV versions)
Fresh air flow rate	Up to 500 m³/h
Supply air flow rate	Up to 500 m³/h
Cooling capacity	Up to 1685 W
Heating capacity	Up to 6020 W
Max. operating pressure, water side	6 bar
Max. operating temperature	75 °C
Sound power level	31 – 50 dB(A)
Supply voltage	230 V AC ±10 %, 50/60 Hz
Weight	From 80 kg

SCHOOLAIR-V-0 (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	From 680	From 900	From 1130	From 1440
Room cooling capacity	W	From 401	From 534	From 668	From 844
Air temperature inside 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	18.1
Condensation	g/h	0	0	0	0
Chilled water flow rate	l/h	80	130	190	250
Water temperature, inlet	°C	16	16	16	16
Water temperature, outlet	°C	23.3	22	21.1	21
Water side pressure drop	kPa	<3	<5	<8	<12
Total heating capacity	W	2780	3700	4490	5470
Room heating capacity	W	862	1136	1303	1422
Air temperature inside the unit	°C	–12	–12	–12	–12
Supply air temperature	°C	37.2	37.0	35.6	33.3
Hot water flow rate	l/h	90	150	200	250
Water temperature, inlet	°C	60	60	60	60
Water temperature, outlet	°C	32.9	38.5	40.4	40.9
Water side pressure drop	kPa	<3	<5	<7	<11
Sound power level L_WA	dB(A)	31	36	41	46
Sound pressure level with 8 dB system attenuation	dB(A)	23	28	33	38

SCHOOLAIR-V (1800 mm) (sizing examples)

Supply air flow rate	m³/h	150	230	280	350
Fresh air flow rate	m³/h	150	230	280	350
Total cooling capacity	W	684	1060	1310	1590
Room cooling capacity	W	406	630	786	935
Air temperature inside the unit	°C	32.0	32.0	32.0	32.0
Rel. humidity	%	40.0	40.0	40.0	40.0
Water content of the dry air	g/kg	11.9	11.9	11.9	11.9
Supply air temperature	°C	17.9	17.8	17.6	18.0
Condensation	g/h	0	0	0	0
Chilled water flow rate	l/h	60	120	180	210
Water temperature, inlet	°C	16	16	16	16
Water temperature, outlet	°C	25.8	23.6	22.3	22.5
Water side pressure drop	kPa	1.1	3.8	8	10.4
Total heating capacity	W	2950	4230	4900	5630
Room heating capacity	W	907	1122	1150	1005
Air temperature inside the unit	°C	–12.0	–12.0	–12.0	–12.0
Supply air temperature	°C	40.1	36.6	34.3	30.6
Hot water flow rate	l/h	100	170	200	210
Water temperature, inlet	°C	60	60	60	60
Water temperature, outlet	°C	34.4	38.4	38.8	36.8
Water side pressure drop	kPa	4.8	12.3	16.5	18.1
Sound power level L_WA	dB(A)	31	38	42	47
Sound pressure level with 8 dB system attenuation	dB(A)	23	30	34	39

SCHOOLAIR-V-HE (sizing examples)

Supply air flow rate	m³/h	150	200	240	360
Total heating capacity (without heat recovery)	W	2960	3820	4520	6020
Room heating capacity	W	671	781	890	675
Air temperature inside the unit	°C	–16	–16	–16	–16
Supply air temperature	°C	35.4	33.7	33.1	27.5
Quantity of condensate	g/h	510	690	830	1180
Hot water flow rate	l/h	75	110	150	200
Water temperature, inlet	°C	60	60	60	60
Water temperature, outlet	°C	26	30	34	34
Water side pressure drop	kPa	2.9	5.7	10.0	16.7
Sound power level L_WA	dB(A)	36	40	43	50
Sound pressure level with 8 dB system attenuation	dB(A)	28	32	35	42

SCHOOLAIR-V-HV (sizing examples)

Supply air flow rate	m³/h	200	300	400	500
Total heating capacity (with heat recovery)	W	1300	1960	2530	3150
Room heating capacity	W	508	772	962	1169
Air temperature inside the unit	°C	10.0	10.0	10.0	10.0
Supply air temperature	°C	28.6	28.7	28.2	28.0
Hot water flow rate	l/h	35	60	85	120
Water temperature, inlet	°C	60	60	60	60
Water temperature, outlet	°C	27.8	31.7	34.1	37.2
Water side pressure drop	kPa	2	5	9.5	17

Supply and extract air unit with heat exchanger and heat recovery unit, secondary air option (based on air quality), for vertical installation on an external wall, e.g. adjacent to a window.

Special characteristics

Decentralised ventilation unit for high volume flow rates
Motorised shut-off dampers for fresh air and exhaust air, normally closed (NC) in order to prevent uncontrolled airflows
Demand-based ventilation and extract ventilation is possible by means of monitoring the room air quality and with dedicated control equipment
The type of heat recovery unit depends on the unit variant: cross flow plate heat exchanger, cross counter flow plate heat exchanger including bypass damper with electric actuator (open-close or modulating) or rotary heat exchanger
Heat exchanger as 2-pipe or 4-pipe system, with G½" union nuts and flat seals
Meets the hygiene requirements of VDI 6022
Filter class: F7 for fresh air, G3 for extract air
Easy filter change with quick release fasteners, no tools required
Condensate drip tray with or without condensate drain
Compact construction, hence particularly suitable for refurbishment projects
Automatic switching to secondary air mode (only with an air quality sensor) if the room air quality (measured with the integral VOC sensor, for example) is between the previously defined range. The unit always starts in secondary air mode, which is more energy efficient.
Depending on the unit, an enthalpy heat recovery unit may be used

Materials and surfaces

Casing, filter chamber cover, fans and levelling feet are made of galvanised sheet steel
Heat exchanger with copper tubes and aluminium fins
Heat recovery unit made of aluminium or plastic (depending on variant)
Casing powder-coated, black (RAL 9005)
F7 filter medium made of moisture-resistant glass fibre paper (certified by Eurovent)
Mineral wool lining to DIN 4102, fire rating class A, faced with glass fibre fabric as a protection against abrasion, effective with airflow velocities up to 20 m/s
Closed cell sealing strips

Construction

Powder-coated RAL 9005, black

Technical data

Width: 397 mm (2-pipe or 4-pipe), 600 mm (2-pipe or 4-pipe, 1800, HE and HV)
Height: 1800 mm (2-pipe or 4-pipe, 1800 version), 2000 mm (HE version), 2160 mm (2-pipe), 2200 mm (HV version), 2350 mm (4-pipe)
Depth: 359 mm (2-pipe or 4-pipe, 1800 version) 408 mm (2-pipe or 4-pipe HE and HV versions)
Fresh air flow rate: up to 500 m³/h
Supply air flow rate: up to 500 m³/h
Cooling capacity: up to 1685 W
Heating capacity: up to 6020 W
Max. operating pressure: 6 bar
Max. operating temperature: 75 °C
Sound power level: 31 – 50 dB(A)
Supply voltage: 230 V AC ±10 %, 50/60 Hz
Weight: from 80 kg
Rating: SCHOOLAIR-V-2L: 136 VA, SCHOOLAIR-V-4L: 117 VA, SCHOOLAIR-V-1800: 141 VA, SCHOOLAIR-V-HE: 208 VA, SCHOOLAIR-V-HV: 495 VA
Power consumption with nominal air volume: SCHOOLAIR-V-2L: 44 W, SCHOOLAIR-V-4L: 45 W, SCHOOLAIR-V-1800: 46 W, SCHOOLAIR-V-HE: 42 W, SCHOOLAIR-V-HV: 147 W

Sizing data

Fresh air

V_________________[m³/h]

Supply air

V_________________[m³/h]

Room cooling capacity

Q_________________[W]

Room heating capacity

Q_________________[W]

L_WA_______________[dB(A)]

Type
SCHOOLAIR-V Vertical ventilation unit

Variant
       No entry: standard
HE       High heat recovery percentage
HV       High volume flow rate

Heat exchanger
2 2-pipe
4 4-pipe

Condensate drip tray
No entry: none
KM with condensate drain

Dimensions [mm]
B × H × T
397 × 2160 × 359 (2-pipe)
397 × 2350 × 359 (4-pipe)
604 × 1800 × 359 (2- or 4-pipe, length 1800)
600 × 2000 × 408 (2- or 4-pipe, construction HE)
600 × 2200 × 408 (2- or 4-pipe, construction HV)

Control
No entry: none
R With

Control function
MA Master (room module and control module)
SL Slave (control module)

Real time clock
       No entry: none
       master only
T       With

Interface
       No entry: none
       master only
B       BACnet MS/TP or Modbus RTU
L       LonWorks LON-FTT10

Air quality sensor
       No entry: none
       master only
V       VOC sensor

Supply air temperature sensor
Z With

Fresh air temperature sensor
       No entry: none
       master only
A       With

Heating valve
HV With

Lockshield – heating circuit
R With

kVS value – heating valve
0,25
0,40
0,63
1,00
F0,50

Cooling valve
For 4-pipe systems only
KV with

 Lockshield – cooling circuit
R With

 kVS value – cooling valve
0,25
0,40
0,63
1,00
F0,50

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.

Variants, Dimensions and weight

SCHOOLAIR-V-1800

SCHOOLAIR-V-2350 4L FSL-CONTROL II

Installation examples, Installation details, Basic information and nomenclature

Installation example

Installation and commissioning

Vertical installation (floor standing) on the façade system or an external wall, e.g. adjacent to a window
Level adjustment using the 4 levelling feet (+40 mm)
1 adjustable mounting bracket to screw-fix the unit to the wall
Weather protection for the fresh air and exhaust air openings to be provided by others
The fresh air connection is provided by two ventilation openings in the façade system or external wall (to be provided by others), preferably sloping towards the outside
Free area of ventilation openings: 0.05 m² for each opening
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
The electrical connection is on the lower right when seen from the room
The under sill trim must not obstruct installation or deinstallation of the unit or maintenance access on the front of the unit

Schematic illustration of inducing displacement flow ventilation

Nomenclature

L_WA [dB(A)]

Sound power level

t_Pr [°C]

Primary air temperature

t_WV [C°]

Water flow temperature – cooling/heating

t_R [C°]

Room temperature

t_AN [C°]

Secondary air intake temperature

Q_Pr [W]

Thermal output – primary air

Q_tot [W]

Thermal output – total

Q_W [W]

Thermal output – water side, cooling/heating

V_Pr [l/s/m³/h]

Primary air volume flow rate

V_W [l/h]

Water flow rate – cooling/heating

V [l/h]

Volume flow rate

∆t_W [K]

Temperature difference – water

∆p_W [kPa]

Water side pressure drop

∆p_t [Pa]

Total pressure drop, air side

∆t_Pr = t_Pr - t_R [K]

Difference between primary air temperature and room temperature

∆t_RWV = t_WV - t_R [K]

Difference between water flow temperature and room temperature

∆t_Wm-Ref [K]

Difference between mean water temperature and reference temperature

Principal dimensions

L_N [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.

Downloads

product information

Product data sheet Type SCHOOLAIR-V

PD_2018_02_SCHOOLAIR-V_DE_en Product data sheet 2,8 MB pdf

certificates

Declaration of hygiene conformity Type SCHOOLAIR-V

SCHOOLAIR-V_HC_2020_06_05_DE_en Hygiene certificate 1000 KB pdf

References

Installation example SCHOOLAIR-V

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SCHOOLAIR-V

Supply and extract air unit with heat exchanger and heat recovery unit, secondary air option, for vertical installation on an external wall, e.g. adjacent to a window

Application

Technical information

Function, TECHNICAL DATA, QUICK SIZING, Specification text, Order code, Related products

Variants, Dimensions and weight

Installation examples, Installation details, Basic information and nomenclature

Downloads

product information

Product data sheet Type SCHOOLAIR-V

certificates

Declaration of hygiene conformity Type SCHOOLAIR-V

References

Installation example SCHOOLAIR-V

TROX Services

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE