BioClass TR
48
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.
19.3
Automatic water filling function (P.20 = 3)
BioClass TR
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.