19
BIOCLASS iC 66
2.11
Installation with a BT-DUO buffer tank (Optional)
The
BioClass iC 66
boiler can be accompanied by a
BT-DUO Buffer Tank
during the installation
from the wide range offered by
DOMUSA TEKNIK
, which may increase the benefits provided by the
boiler in the heating service. This tank has a hot water storage tank inside, thereby adding the provision
of DHW in addition to the buffer tank functionality. For this reason, its connection to the boiler as well
as its operating configuration are specific.
For this reason the electronic control of the boiler is equipped with an input for connecting the primary
control thermostat
Tcp
of the BT-DUO tank (input
Sbt
; terminals
18-19
on connection strip
J7
) and
a circulation pump output (
Bbt
; terminals
N-7
on the connection strip
J2
) dedicated exclusively to
managing the heating of the buffer tank. Also, for correctly managing the DHW production in the tank
integrated in the
BT-DUO tank
, a DHW temperature sensor (supplied optionally) must be included in
the installation.
The boiler is supplied with this installation option disabled. To enable it, the electrical resistance (
Rbt
)
connected between terminals
18
and
19
of connection strip
J7
(see "Connection Diagram")
must be
disconnected and replaced with a temperature sensor (supplied as an option by DOMUSA TEKNIK) or
a control thermostat installed in the BT buffer tank. After disconnecting the resistance in the
"Technician" menu of the control panel, parameter
P.08
must be enabled, via which you can select the
installation mode and appropriate functioning for this type of buffer tank.
The BT-DUO buffer tank is hydraulically connected to the boiler, interposing a circulation pump (
Bbt
),
and all the central heating circuits of the system are connected to the
BT-DUO
tank. For the correct
hydraulic installation of the BT-DUO tank and the feed pump
Bbt
, carefully follow the instructions in
the following hydraulic diagram:
Heating
Installation
