Installation & Servicing instructions
AT
AG XL
10
4
Description
The ATAG XL is a condensing and modulating CH-boiler.
The boiler has one or two stainless steel heat exchangers with smooth pipes. A high-
tec principle with durable materials suitable for room sealed open flue or over pressure
cascade flue systems
The CH-boiler uses (natural) gas to supply heat. This heat is transferred in the heat
exchanger to the water contained in the CH-installation. Severe cooling down of the
flue-gases causes condensation. That is the reason why they are so highly efficient.
The internal siphon drains off the resulting condensate, which does not have a negative
impact on the heat exchanger or its functioning.
The boiler is equiped with its own controller per heat exchanger and is fitted with an in
-
tegrated cascade manager. The control unit (MMI) allows central read-outs of settings.
Each boiler anticipates the heat demands of the CH-installation or the hot water supply.
Consequently, the boiler modulates its capacity to the installation. As a result, the boiler
will be operational longer at a lower level. The cascade manager controls the boiler order
and even allocation of burning hours.
Connected to an external sensor, the control can operate weather dependent. This means
that the control system measures outside temperatures and water flow temperatures.
Using this data, the control system works out the optimum water flow temperature re
-
quired for the installation.
Standard connection facilities for external controls via OpenTherm, on/off-contact or 0-10
volt control are available, including built in time program.
ATAG XL CH-boilers are high-powered wall-mounted gas boilers for instances where
a lot of power is required. Cascading the XL CH-boilers provides ample room to con-
nect up to a maximum of 8 boilers and an output capacity of 1.1 MW. The XL-series is
structured as follows:
- XL70
Nominal capacity (80/60°C)
60.0kW
- XL110
Nominal capacity (80/60°C)
95.0kW
- XL140
Nominal capacity (80/60°C)
120.0kW
Explanation of type indication:
ATAG XL 140
XL = Type
140 = Indication of input load in kW
In principle any combination is possible. Based on the requested capacity, ATAG’s online
cascade configurator offers various options.
You can choose either the most efficient or the most compact solution yourself.
The capacity of the hydraulic pipes, gas line and low velocity header are adjusted to the
selected overall demand.
When installing a single XL boiler or cascaded XL boilers, you should always
use a low velocity header adjusted to the set demand. ATAG supplies 2 low ve-
locity header versions, which are suitable for a maximum demand of either 452
kW or 960kW (80/60°C)
respectively.
If changes are made to the boiler construction the boiler no longer complies with
the CE requirements.
