AM 900 - ventilation system suitable for larger rooms

AM 900 is a balanced decentralised ventilation unit with heat recovery, which is offered in two different versions for mixing and displacement ventilation. The different ventilation principles give the unit a high level of flexibility, and the model is chosen according to the layout and use of the room.

The unit can stand freely on the floor or discreetly between cabinets, as an integrated part of the room. Like all Airmaster units, the ventilation unit can be demand-controlled with a CO₂ sensor, motion sensor (PIR), or hygrostat, for example. The unit can be supplied with a separate control panel but can also be connected to a central control.

Examples of applications

Offices
Meeting rooms
Institutions
Gyms and the like

AM 900 data

Technical data

Technical data	Filter class	30 dB(A)	35 dB(A)
* At filter class, supply air/extract air: ePM10 75% / ePM10 75%
Mixed
Maximum capacity	ePM10 75% ePM1 55% ePM1 80%	690 m3/h 669 m3/h 649 m3/h	830 m3/h 805 m3/h 780 m3/h
Throw length (0,2 m/s)		6 m at 690 m3/h	7,2 m at 830 m3/h
Maximum capacity	ePM10 75% ePM1 55% ePM1 80%	650 m3/h 631 m3/h 611 m3/h	800 m3/h 776 m3/h 752 m3/h
Displacement ventilation
Adjacent zone (0,2 m/s)		Adjacent zone to outlet, approx. 1,2 m at 650 m³/h	Adjacent zone to outlet, approx. 1,5 m at 800 m³/h
Nominal current*		1,8 A
Nominal power consumption*		240 W
Electrical connection		1 x 230 V + N + PE / 50 Hz
Duct connections		Ø315 mm
Condensate drain		Ø4/6 mm
Weight		180 kg
Counterflow heat exchanger		3 x PET
Supply air filter		ePM10 75%, ePM1 55% or ePM1 80%
Extract air filter		ePM10 75%
Colour, casing		Ral 9010 (white)
Power cable		3 x 1,5 mm²
Recommended fuse		13 A
Leakage current		<– 6 mA
Dimensions (WxHxD)		Mixed: 800 x 2323 x 602 mm
		Displ.: 800 x 2323 x 687 mm
Minimum ceiling height		2490 mm

Electric heating surface	Preheater	Comfort heater
Heat output	1500 W	1050 W
Thermal circuit breaker, aut. reset	75°C	75°C
Thermal circuit breaker, man. reset	120°C	120°C

WATER HEATING SURFACE	comfort heater
* Capacity at: supply/return temperature 60/40°C, water volume 111 l/h
Max. operating temperature	90°C
Max. operating pressure	10 bar
Heat output	2345 W*
Connection dimension	1/2" (DN 15)
Materials pipes/fins	copper/aluminium
Open/close time, motor valve	60 s

Standard and options

Standard and options	AM 900
x: standard o : option
Bypass	x
Electric preheater	o
Electric comfort heater	o
Water comfort heater (mixing ventilation)	o
CO2 sensor (built-in)	o
Condensate pump	o
Motor driven exhaust air damper	x
Motor driven supply air damper	x
Capacitive return for motorised damper	o
Counterflow heat exchanger (PET)	x
Energy meter	o

Throw length and adjacent zone

Throw length, mixed

Throw length illustrated for volume flow rate 830 m3/h. At other volume flow rates the throw can be extrapolated: L2 = L1 x q2 / q1.

The AM 900 unit spreads an air stream below the ceiling depending on the given flow rate. Blue shading in the illustration indicates spread pattern and throw.

1. Spread pattern seen from above, symmetric inlet (default).
2. Spread pattern seen from above, asymmetric inlet.
3. Spread pattern seen from the side.

Throw length and spread of the supply air in the room can be adjusted to the geometry of the room by adjusting the inlet opening with a pair of plyers (see operator's manual).

Notes regarding ceiling height
The AM 900 will fit into a room with minimum ceiling height of 2,49 m. The illustrated throw will manifest itself in these circumstances. The AM 900 will also work with larger ceiling heights, up to 4,50 m has been tested. Height above 2.50 m should be subtracted from the length of the throw.

Adjacent zone, displacement

The result applies to an undertemperature of the inlet air of 3-5°C.

Versions

AM 900 HM – supply in the top

AM 900 HM is a horizontal version with the supply and exhaust at the rear. The supply grill is at the top of the unit and ventilates according to the principle of mixing ventilation.

AM 900 HMF – supply at the top of the front

AM 900 HMF is a horizontal version with the supply and exhaust at the rear. The supply grill is at the top of the unit’s front and ventilates according to the principle of mixing ventilation.

AM 900 VM – supply in the top

AM 900 VM is a vertical version with the supply and exhaust through the top of the unit. The supply grill is also at the top of the unit and ventilates according to the principle of mixing ventilation

AM 900 VMF – supply at the top of the front

AM 900 VMF is a vertical version with the supply and exhaust through the top of the unit. The supply grill is at the top of the unit’s front and ventilates according to the principle of mixing ventilation.

Product catalogue 6.0

Extend the service life of the unit.

You can help extend the service life of your Airmaster unit.

One way to do this is to make sure you change the filter in the unit - and to use original Airmaster filters.

This also ensures that energy consumption remains minimal throughout the service life of the unit.

Contact us if you want to know more about decentralized ventilation

Our competent sales team is ready to answer your questions and advise you on everything from dimensioning, configuration, installation, and planning - so you can find just the right unit for your needs.