BioClass TR
28
9
OPERATION WITH A BT-DUO BUFFER TANK (OPTIONAL)
The
BioClass TR
boiler can be accompanied by a
BT-DUO Buffer tank
from the wide range of tanks
offered by
DOMUSA TEKNIK
. This tank accumulates heat energy that improves the performance of
the system when switching the boiler on and off. It also incorporates a DHW cylinder in its interior
for obtaining Domestic Hot Water. For its correct installation, carefully follow the assembly
instructions included with the tank and for its correct integration with the
BioClass TR
boiler, read
the instructions in the section
"Installing a BT-DUO Buffer tank"
in this manual.
In this operating mode you must select the desired setpoint temperature of the boiler
(see
"Selecting the boiler setpoint temperature")
and, using the adjustment thermostat of the control
panel in the BT-DUO buffer tank, you must also select the desired setpoint temperature in the
buffer tank.
It is essential for the operation of the installation that the setpoint temperature
selected for the boiler exceeds the setpoint selected for the thermostat of the BT-DUO buffer
tank and it is recommended that it be at least 5 to 10 °C higher
. The modulating burner of the
BioClass TR
boiler will start working to heat the water within it. When the boiler temperature
exceeds 60 ºC the feed pump for the buffer tank will start up to heat the BT-DUO tank, provided
that its control thermostat is activated (demanding heating). When the BT-DUO tank thermostat
reaches the desired temperature and turns off the heating demand, the operation of its feed pump
will be disabled.
Regarding the central heating service of the boiler, the circulation pump connected to it (
BC
) will be
activated whenever room thermostat No. 1 (
TA1
), or the remote control
LAGO FB OT+
(if present),
demands heating. In other words, when the room temperature where the thermostat or the remote
control is installed is lower than that which is set. When the atmosphere reaches the desired
temperature and after a time of post-circulation (parameter
P.15
in the "Technician Menu"), the
operation of the heating pump (
BC
) will turn off.
Regarding the operation of the service for providing DHW, provided that a DHW temperature
sensor is installed in the
BT-DUO
tank, you must select the desired DHW setpoint temperature
(see
"Selecting the DHW setpoint temperature")
. The burner will ignite and the feed pump for the
BT-
DUO
tank will be activated whenever the water temperature of the boiler exceeds 60 °C. When the
tank reaches the DHW setpoint temperature selected and after a waiting period (parameter
P.16
in
the "Technician Menu"), it will once again be available to heat the central heating system, activating
the central heating service. In order to provide an optimal production of DHW, while this is active
the boiler's central heating service will remain disabled and it will not be restored until it has
finished heating the DHW cylinder of the
BT DUO
tank.
The boiler's central heating service can be totally disabled (
Summer
mode) by selecting a boiler
setpoint value of "
OFF
". In this operating mode, only the DHW production function will remain
enabled, via the cylinder integrated inside the
BT-DUO
tank. Also, you may totally disable the
domestic hot water production function by selecting "
OFF
" as the DHW setpoint temperature.
IMPORTANT: It is essential that the setpoint temperature of the boiler exceeds the setpoint
selected for the control thermostat of the buffer tank.
NOTE: When the heating function is disabled, all the circuits of the BIO hydraulic Kit will also
be disabled, if connected.
NOTE: For the correct operation of the BT-DUO buffer tank, parameters P.08 and P.09 in the
"Technician" menu must be set to 4 and 0 respectively.
