7
4.2
Hydraulic installation
The hydraulic installation must be made by qualified personnel. The applicable installation
legislation is to be complied with, and the following recommendations should also be taken into
account:
- It is essential to install the external circulation kit (back in protection Kit)
with the
BioClass
HM 66
boiler, to prevent any water condensation in the heat exchanger. If this requirement is
not complied with,
DOMUSA TEKNIK
’s guarantee of the appliance will automatically be null
and void.
- The inside of the installation piping should be thoroughly cleaned before switching on the
boiler.
- We recommend inserting cut-off valves between the installation piping and the boiler to
simplify maintenance tasks.
- Leave a free space around the boiler for carrying out any maintenance and repair operations.
- Drain valves and suitable devices for correctly bleeding the air from the circuit during the boiler
filling stage should be fitted.
- Install all the necessary safety elements (expansion vessel, safety valve, etc.) to comply with the
applicable regulations for the installation.
- If the boiler is installed at a lower height than the heating installation, it is recommendable to
create a siphon at the boiler outlet, to prevent the installation from heating up due to natural
convection when heating is not required.
4.3
Cascade circuit control and regulation
The
BioClass HC
boiler is not fitted with a hydraulic regulation and control circuit in cascade. The
control must be carried out using an external controller (optionally supplied by
DOMUSA TEKNIK
).
The controller of the hydraulic circuit manages the activation of the boiler through the (
TA1
)
connectors of such boiler. Each boiler has a terminal strip
J6
where the controller is connected (
TA)
(see
”Connections diagram”
). The
J6
borne is equipped with a jumper which is removed to connect
the controller.
The following figures show an example of a hydraulic layout for a
BioClass HC
boiler system with an
inertia tank or hydraulic separator regulated by an E26 controller (optionally supplied by
DOMUSA
TEKNIK
).
