Create a Comfortable Classroom Environment
AirCraft Air Handling are a leading British Manufacturer of Air Handling Units providing quality products and cost effective solutions.
Established in the 1990’s, AirCraft have designed and manufactured bespoke and versatile units that have provided quality service in varied environments including Education, Offices, Shopping Centres, Laboratories and Hotels. AirCraft products have created comfortable environments all over the UK, Europe and the Middle East.
Compact Designs
Cost Effective Solutions
Individually Customised
Quiet Operation
Classroom Ventilation Units
Due to our policy of continuous product development, we reserve the right to change the specification without notice. Optional extras may occur a charge. The specifications shown in this literature are for guidance only.
CASINGUnit frame work shall be 30mm aluminium section with cast corner pieces, AirCraft Air Handling Classroom Ventilation Units use 2mm thick aluminium for the profile sections.
Panels shall be flush into the framework providing a smooth outer and inner finish. Panels shall be of double skinned construction tray form comprising of the following:-
25mm thick and manufactured using 0.7mm plastisol outer skin and 1.0mm galvanised inner skin.
25mm thick insulation with thermal conductivity of 0.04 w/m3 between skins.
Access panels shall be of hinged design and shall seat into compression rubber seals.
Lockable handles shall be fitted to all access doors.
Inner skin acoustically treated.
FAN SECTIONFans shall be double inlet double width with forward curved impellor. Fan wheels shall be statically and dynamically balanced and mounted on a solid steel shaft turning in sealed for life bearings.
Drive motors shall be of the TEFC type with class F insulation wound for 415 v 3 phase 50Hz electrical supply. Motors shall be mounted on slide rails for Vee belt tensioning.
Drives shall be by means of Vee belt drive and taper lock pulleys.
Fan assembly shall be isolated from unit casing with anti vibration mounts and a flexible connection.
Inverters / speed controllers supplied as “free issue” items for fixing / wiring by others.
FILTER SECTIONFilters shall be mounted in a galvanised steel frame for side withdrawal. The panel filters shall be G4. Bag filters shall be F7.
Manometers are fitted to all filters. Model ref AHC 600 operating range 0-600 pa. Operating limits maximum pressure 200 kpa temperature limits -40 /+60 0C. Accuracy 5 pa (inclined scale) 20 pa (vertical scale). Gauge fluid ISO-paraffin, s.g. 0.786 kg/dm3 (150C).
Note – structure of gauge prevents the gauge fluid escaping from the meter.
DAMPER SECTIONWhere stated, the units shall have a fresh air intake and return dampers. Damper to have edge seals fitted to blades and suitable for motorized operation.
Damper torque = 4 Nm per 1m2 of damper face area.
HEATING COILSHeating coils shall be suitable for operation with LPHW. All colis shall be constructed from seamless copper tubes expanded into aluminium fins.
The coil block shall be housed in a galvanised steel casing suitable for “slide in” application. Connections to be steel BSP screwed.
A 10% margin in capacity shall be included in all coil selections.
All coils shall be tested to 30 kg.cm2 air under water and copies of test certificates provided.
Coil face velocity not to exceed 2.5 m3/s.
RECUPERATORRecuperator to be of aluminium plate type and shall be of a minimum efficiency of 50%
Aluminium exchange plates contained within an extra strong galvanised steel casing. Exchange block is mechanically sealed. Face and bypass damper fitted to the supply side. Condensate drain tray fitted.
AirCraft Air Handling LtdMoorfields Industrial Estate
Cotes HeathStafford ST21 6QY
Tel: 01782 791 545Fax: 01782 791 283
www.aircraftairhandling.co.uk
SAMPLE SPECIFICATION
Air Volumes 0.21cum/sec ‐ 0.66cum/sec (Maximum Boosted Air Volumes)
0.16cum/sec ‐ 0.44cum/sec (Normal Operating Air Volumes)
Unit Size 4/10 4/8 4/6
Unit Dims 2.4m l x 2.0m w x 0.38mm deep 2.4m l x 1.6m w x 0.38mm deep 2.4m l x 1.2m w x 0.38mm deep
Configuration Horizontal Side x Side Horizontal Side x Side Horizontal Side x Side
Construction: 30mm thick Double Skinned c/w 65kg Rockwool in‐fill
Air Volume Supply Extract Supply Extract Supply Extract
Max Boost Volume 0.66 cum/sec 0.66 cum/sec 0.36 cum/sec 0.36 cum/sec 0.21 cum/sec 0.21 cum/sec
Normal Vol @ 2/3rd Speed 0.44 cum/sec 0.44 cum/sec 0.24 cum/sec 0.24 cum/sec 0.16 cum/sec 0.16 cum/sec
Dampers (suitable for actuation) Fitted Fitted Fitted Fitted Fitted Fitted
Primary Filter G5 Panel G5 Panel G5 Panel
Secondary Filter F7 Bag F7 Bag F7 Bag
Return Air Filter G5 Panel G5 Panel G5 Panel
Plate Recuperator Fitted Fitted Fitted
Data based on Face & Bypass Damper Fitted Fitted Fitted
Normal Volume Supply Air "On" (degC) ‐4degC ‐4degC ‐4degC
2/3 speed Supply Air "Off" (degC) 9.1degC 9.0degC 9.9degC
Extract Air "On" (degC) 22.0degC 22.0degC 22.0degC
Extract Air "Off" (degC) 11.1degC 11.3degC 10.7degC
Temp Efficiency 50.30% 50.20% 53.30%
Capacity (kW) 6.94kW 3.77kW 2.67kW
Heater Battery Fitted Fitted Fitted
Data based on Coil Velocity (m/sec) 2.3m/sec 1.7m/sec 1.6m/sec
Normal Volume "On Coil" Temp (degC) ‐4degC ‐4degC ‐4degC
2/3 speed "Off Coil Temp" (degC) 28degC 28degC 28degC
Htg Medium LPHW LPHW LPHW
Medium F&R Temps (degC) 82/71degC 82/71degC 82/71degC
Coil Duty/Size (kW) 16.9kW 9.44kW 6.29kW
Fan Details Supply Extract Supply Extract Supply Extract
Data based on Air Volume (cum/sec) 0.44 0.44 0.24 0.24 0.16 0.16
Normal Volume External Static (Pa) 150 150 150 150 150 150
2/3 speed Fan Static (Pa) 692 586 453 341 408 294
Absorbed kW 0.877kW 0.725kW 0.274kW 0.203kW
Motor Size (kW) 1.5kW 1.5kW 1.1kW 0.55kW 279watts 279watts
Start Current (x) x5.3 x5.3 x4.7 x4.3
Run Current (FLC) 3.4 3.4 2.7 1.45 1.3 1.3
Elec Supply 415v 415v 415v 415v 240v 240v
In Duct Noise Levels dBA dBA dBA dBA dBA dBA
63 80 77 70 67 68 67
125 85 85 78 75 77 72
250 84 80 72 66 71 65
500 79 76 70 66 69 65
1K 77 75 70 68 69 66
2K 78 76 69 66 68 64
4K 74 72 66 64 64 61
8K 71 69 62 59 60 57
Fan Type F/C F/C F/C F/C F/C F/C
Fan Speed (rpm) 2979 2750 2312 2007 1945 1945
Outlet Velocity (m/s) 5.2m/s 5.2m/s 5.7m/s 5.7m/s 7.8m/s 7.8m/s
Speed Controllers/Inverters Inverter Inverter Inverter Inverter Speed Cntrl Speed Cntrl
Inner Skin Acoustically Treated Yes Yes Yes Yes Yes Yes
Access Units c/w side/bottom sealed access panels/doors
Available Optional Variations: Electrical Heaters DX Cooling Coils Chilled Water Coils
AirCraft Air Handling Ltd. Tel: 01782 791 545. Fax: 01782 791 283. Email: [email protected]. Www.aircraftairhandling.co.uk