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External air supply for ATMOS A25 pellet burner

The device enables the supply of combustion air to the ATMOS A25 burner from outside areas.

The device (accessory) allows the supply of combustion air to the ATMOS A25 burner from outdoor areas, for example for objects requiring a blower door test (building airtightness test).
The device is intended only for the ATMOS A25 burner and pure pellet boilers from the ATMOS company up to a boiler output of 25 kW.

Designed for boilers with an exhaust fan

D20P, D15PX, D20PX, D25PX

Designed for boilers without an exhaust fan

D15P, D10PX, D14P, D21P, D25P

Kit composition:
1 – 1x external air supply flange for A25

2 – 1x seal under the flange of the external air supply
3 – 15x screw Ø 4 mm (with drill)
4 – 4x screw 4×30 mm (for dowel)
5 – 4x dowel
6 – 1x aluminum hose with an inner diameter of 100 mm and a length of 5 m (for a hole in the wall Ø 110 mm)
7 – 1x flexible hose with a diameter of 100 mm and a length of 70 cm (for DxxPX, PXxx)
8 – 1x hose holder with socket – flexible and fixed hose coupling (for DxxPX, PXxx)
9 – 3x hose holder – for attaching the hose to the boiler or to the wall
10 – 3x cable tie to attach the hose to the hose holder with a nozzle
11 – 1x cover – external grille on the facade of the house (round – Attention: not to be confused)

Examples of installation of external air supply in boiler rooms

Boiler: DxxPX

Installation with right outlet and flexible hose for easy door opening – one 90 ° elbow

 

6 – aluminum hose Ø 100 mm
7 – flexible hose
8 – hose holder with nozzle
9 – hose holder
11 – external grille on the facade of the house