EN
56
BIOCLASS iC DX
18
MULTI-FUNCTIONAL RELAY (P.20)
Bioclass iC DX
is equipped with an auxiliary relay output that may be used to select a series of additional
functions that increase the boiler performance, features and comfort of the installation.
Several operating modes may be set at
P.20
parameter of the
“Technical Menu”
to define the
"multi-
functional relay"
function. The default value of this parameter is 0 (disabled). The following sections
describe the functions that could be set.
18.1
Boiler alarms external signal (P.20 = 1)
When this function is selected (
P.20 = 1
) if the boiler shows an error or an operating alarm code the
multi-functional relay output will be activated, supplying voltage (230 V~) between terminals no.
4
:
"
NO
" and
N
of the terminal strip
J3
, where any external alarm signalling device may be connected to
warn of boiler malfunctioning.
When the boiler lockage is reset, the multi-functional relay output will supply voltage again (230 V~)
between terminals no.
3
: "
NC
" and
N
of the terminal strip
J3
.
18.2
DHW re-circulation function (P.20 = 2)
The DHW recirculation function (
P.20 = 2
) will keep the whole DHW installation hot during the
operating periods programmed in the boiler, so when any hot water tap is turned on the hot water will
be supplied instantly, increasing the comfort of the DHW installation.
A DHW re-circulation pump will be required to install in the installation. This pump has to be connected
in the multi-functional relay output, between the terminals No
4
(
NO
) and
N
of the terminal strip
J3
(see
”Connections diagram”)
. The hydraulic installation and electrical connection of re-circulation
system must be made by qualified personnel.
During the operating periods programmed in the boiler, the multi-functional relay output will be
activated, supplying voltage (230 V~) between terminals No
4
("
NO
") and
N
of the terminal strip
J3
,
where the recirculation pump must be connected. During the switched off periods programmed the
multi-functional relay output will be deactivated, supplying voltage (230 V~) between terminals No
3
("
NC
") and
N
of the terminal strip
J3
and the re-circulation pomp will be stop.
18.3
Automatic water filling function (P.20 = 3)
Bioclass iC DX
boiler may be connected to an automatic water filling system which can be activated
or deactivated by
P.20
parameter.
It will be required to install a motorised valve to filling the water between the distribution water and
the primary circuit of the boiler. This valve has to be connected in the multi-functional relay output
between the terminals No
4
(
NO
) and
N
of the terminal strip
J3
(see
”Connections diagram”)
. The
hydraulic installation and electrical connection of the automatic water filling system must be made by
qualified personnel.
If the function is enabled (
P.20 = 3
) the electronic controller of the boiler will active the multi-functional
relay output supplying voltage (230 V~) between the terminals No
4
(
NO
) and
N
of the terminal strip
J3
(see
”Connections diagram”)
that activates the connected filling valve to refill the primary circuit up
to the pressure set at
P.21
parameter. If the boiler pressure drops below the minimum pressure set at
P.19
parameter the boiler will automatically fill up again until the filling pressure value is reached.
