9
RECOMMENDATIONS
• the detailed design of the system must be carried out by a
heating engineer.
• we recommend applying simple patterns of proven
effectiveness and providing the system with useful elements to
check correct operation: temperature probes, mixing valves,
thermometers, etc.;
• the heat distribution circuit (radiators or radiant floor panels)
must be designed to prevent the return line from entering
directly into the boiler;
• provide for an adequate
anti-condensation circuit
or a
lukewarm return line: the supply temperature of the boiler
water should be kept at about 70/80°C with a
return line not
below 55°C;
• we recommend using a heat storage tank to increase the
autonomy between one charge and the next one and absorb
the peaks of energy;
• at regular intervals, it is advisable to clean the combustion
chamber and heat exchangers inside the boiler to keep them in
good working order.
INSTALLATION MODES
The technical law UNI 10412-2 has introduced the possibility to
install the solid combustion based devices matched with devices
with closed expansion tank, endowed with thermal discharge with
emergency exchanger inside the boiler. Thermal cookers and ther-
mal stoves are endowed with all the predispositions for the ther-
mal discharge.
Thermocookers and thermostoves can be installed with open
expansion tank.
SAFETY
On every solid combustible based boilers it is not technically
possible to break the combustion immediately as happens
for boilers based on liquid or gas combustible according to
necessity. For this reason, it is mandatory to swallow always
the produced heating also even if the heating system does
not request that and also in case of lack of AC power. On
contrary, the water in the boiler could boil without possibility
of outlet, with serious danger of explosion of the boiler and
serious injury risk for the people present near the thermal
cooker. For this reason, we recommend to follow strictly the
norm UNI 10412-2, in the various cases. We also suggest
inserting a boiler/puffer in the hydraulic system in order to
accumulate the heating.
Here below you find a few examples of installation diagrams.
The system should be designed by a heating technician.
CONNECTION TO A CLOSED SYSTEM
According to standard UNI 10412/2 (March 2009), a solid
fuel appliance can be installed on a closed water piping sys-
tem providing the appliance has a thermal discharge system
with additional circuit in the heater (coil).
The thermal discharge system allows to cool directly the boil-
er when it is necessary by making flow cold leaking water in
a separate circuit inside the boiler.
All the components of the thermal discharge system external
to the thermal cooker must be obtained by third parts accord-
ing to the specifies of designer and installer.
To make this auxiliary system it is necessary to make the
going and return connections, the detector that rules the
device must be inserted in the apposite connection bulb. The
system, to be effective, must be able to work and must have
availability of cold water also in case of lack of AC power.
All safety devices must be accessible after installation of the
appliance in order to guarantee proper maintenance and
functional verification. Functionality of equipments must be
regularly checked: at least once per year.The thermal dis-
charge circuit must not be used for the production of hot
water for domestic use.
The
thermo stoves
and thermo cookers
FKA900
and
EK90
are already configured for closed-cup installation, as they
always have an exchanger with a built-in coil.
Standard cookers
FK600
and
FK900
are not equiped with a
thermal discharge system in their boiler. So, you have to
clearly specify if you need it when ordering the cooker.
The
FK80P
,
FK110P
and
FKA110P
models have a safety sys-
tem with thermal discharge, safety valves, pumps and plate
exchangers to separate the primary and secondary circuits
and instantly produce domestic hot water.
Along with the anti-condensation function, these models, fit-
ted with an electronic control unit, allow for interaction with a
gas boiler.
As the
EKB110
model has a built-in open cup, it does not
require additional safety systems.
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Summary of Contents for EKB110
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