3
x
Set-up and Installation
12
FA ROTEX A1 BO - 10/2007
3.2
Different set-ups
The oil condensing boilers in the series A1 BO are basically designed for
operation independent of ambient air
. They are fitted
with a concentric flue gas/air supply pipe DN 80/125.
ROTEX recommends operating the oil condensing boiler independently of ambient air.
If possible, choose this set-up!
In partial ambient air-independent and ambient-dependent operation, the installation room must have a
ventilation opening of at least
150 cm
2
to the outside. According to some country-specific regulations, this can
, which downgrades the energy rating of the building.
Fig. 3-4
Different set-ups for the oil condensing boiler in the series A1 BO
1-8
Different set-ups
(Description, see section 3.2.1 to 3.2.3)
1) Set-up version for ambient air-independent mode
2) Set-up version for operation partially independent of ambient air
3) Set-up version for ambient air-dependent operation
Ö
Air supply
Î
Flue gas
a) Longitudinally ventilated shaft with a fire-resistance period of 90 minutes
(30 minutes in low height residential buildings). Observe country-specific
regulations for fire-resistance periods!
b) Humidity-resistant flue gas pipe in compliance with DIN 14 478 (temperature
category T120 or higher, pressure category P1 or H1, condensate resistance
category W, corrosion resistance class 2)
c) Ventilation opening 1 x 150 cm
2
or 2 x 75 cm
2
d) Rear ventilation
