Rizzoli RT Série Manuel D'utilisation page 85

3.5 THERMOSTAT
RT and RP thermal cookers are endowed with
thermostat to control the working of the
pump. The thermostat, or a control unit with
the same function, must be always used when
there is a circulation pump in the system.
The thermostat must be placed outside
WARNING! For a longer duration of the boiler of the thermal cooker, you must
not make circulate the water with temperatures lower than 55-60° C. Lower
temperatures generate acid condensation and gas-black on the walls of the
boiler.
3.6 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
3.7 THERMAL DISCHARGE
For more safety, it is possible to make an
auxiliary circuit of thermal discharge connected
directly to the boiler. The thermal cooker has
a predisposition for this solution. The thermal
discharge system allows to cool directly the
boiler when it is necessary by making flow cold
leaking water in a separate circuit inside the
boiler. The making of the thermal discharge
system is under responsibility of the installer.
All the components of the thermal discharge
system external to the thermal cooker must
be obtained by third parts according to the
specifies of designer and installer. To make
this auxiliary system it is necessary to make
the going and return connections, that are
Cold water
pipe
Pression
reduction
Picture 19 - Thermal discharge circuit scheme.
No return
valve of cleaning
Safety
valve
valve
the device with the temperature detector
inserted in an appropriate hole in the rear
part of the thermal cooker. The thermostat
must guarantee that the pump works when
the boiler hot water temperature overtakes
the set temperature.
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 what is written
in UNI 10412-2 law in the various cases and
we suggest also to insert in the system also
a boiler able to accumulate the heating in
excess produced as sanitary hot water.
interchangeable, 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.
The safety devices must be accessible also after
the installing for the maintenance and the
functional verify. The functional verify must be
done regularly: we suggest at least once a year.
The thermal discharge circuit must not be used
for the production of hot water for domestic
use.
On demand, Rizzoli can give a thermal
discharge valve appropriate for the use with its
thermal cookers.
Sensor
detector
T
Inflow Downflow
83
Sonda
sensore
Discharge
pipe
Thermal
discharge valve