AIC COILMASTER 100, Installation And Maintenance Manual For The Installer And The User

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Connecting to main board / X11
Cascade
Controllers
(subsequent)
Cascade
Controllers
(subsequent)
Cascade
Controllers
(subsequent)
Main board Main board
Main board
Fig. 27. Principles of Cascade
Fig. 28. Cascading Module
alt
er
na
tiv
e
Common
Common
PRINCIP
AL
Boiler
SUBSEQUENT
Boiler
SUBSEQUENT
Boiler
SUBSEQUENT
Boiler
I-73
G-084383_EN • 03
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 Principal, and the others are Sub-
sequent.
In the controller menus, please note
that the Principal boiler is called “Mas-
ter” and a Subsequent boiler is called
“Slave”.
The principal boiler activates the required functions
and shows the additional menus with the parame-
ters for use with the cascaded system.
i
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 with each other using
the cascade module (see Fig. 28 ) . 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 (back-flow preventer) between the boiler flue
outlet and the chimney connection. This will pre-
vent any back flow of the flue gases into a boiler
that is not in operation. Please refer to the manu-
al provided with the accessory for installation and
maintenance recommendations.