Connecting to main board / X11
Cascade
Controllers
(slaves)
Cascade
Controllers
(slaves)
Cascade
Controllers
(slaves)
Main board
Main board
Main board
Fig. 41. Principles of Cascade
Fig. 42. Cascading Module
alt
er
na
tiv
e
Common
Common
I-64
B-070343_EN • B
A
dditionAl
i
nformAtion
for
the
i
nstAller
Boilers in a Cascade System
In a heating system comprised of several boilers, it
is important that the power generated by the boilers
adapts at any moment to the demand of the instal-
lation, always optimising the generators’ efficiency.
Up to 4 boilers can be connected in a cascade to
one chimney, and 4 such groups of boilers with
their chimneys can be controlled using the control
unit of one boiler.
The boiler with device address 1 assumes the role
of the cascade master, and the others are slaves.
The master boiler activates the required functions
and shows the additional menus with the parame-
ters for use with the cascaded system.
This boiler has all the logic control of the cascaded
system and also regulates the stop/start sequence
of each boiler according to the demand of the in-
stallation.
The boilers are connected to each other using the
cascade module (see
Fig. 42
). Each boiler has its
own module, which is connected directly to the
board.
When several boilers are cascaded through their
chimney system, make sure to install a non-return
valve (flue damper) between the boiler flue outlet
and the chimney connection. This will prevent any
back flow of the flue gases into a boiler that is not
in operation. Please refer to the manual provided
with the accessory for installation and maintenance
recommendations.
