Atag XL-W 105, Planner Manual

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Gas condensing boiler XL - W
Models and output
Application possibilities
Value propositions
Models and output
The XL - W is a condensing and
modulating gas boiler with one or
two pre - mix burners and
avaliable in 7 types within an
output range from 60 to 200 kW.
Application possibilities
The XL - W is applicable for all
central heating sytems built
according to EN12828 with a
maximum target temperature of
90*C.
In cascade applications (max. 8
boilers with boiler/cascade con-
troller) the XL - W can cover in-
stallations up to 1600 kW.
Preferred applications are
central heating and sanitary hot
water production in multi - family
buildings, municipal and
industrial buildings.
Value propositions
A large modulation range that
guarantees along
Description
The XL - W is a fully modulating
condensing boiler with one or two
pre - mix burners. The control unit of
the boiler adapts the modulation
ratio automatically to the heat de-
mand requested by the system.
This is done by controlling the
speed of the fan. As a result, the
mixing system will adapt the gas
ratio to the chosen fan speed, in
order to maintain the best possible
combustion figures and therewith
the best efficiency. The flue gases
created by the combustion are
transported downwards through
the heat exchanger and leave at
the boiler at the top into the chim-
ney connection.
The return water from the system
enters the boiler in the lower sec-
tion, where is the lowest flue gas
temperature in the boiler. In this
section condensation takes place.
The water is being transported
upwards through the heat ex-
changer, in order to leave the boil-
er at the flow connection. The
cross flow working principle (water
up, flue gas down) ensures the
most efficient combustion results.