3. HEATING SYSTEM (LT 90 - ST 90)
3.1 GENERAL NOTES
LT - ST thermal cookers are endowed with boiler to use the heating produced by the device
through a system with fluid vector for heating and for the production of hot water. Usually the
system shall be designed according to UNI 10412-2 law by a qualified thermal technician and
installed by specialized staff according to the existing laws and the UNI 10683 law. The LT - ST
Range thermal cookers are endowed with all the necessary predispositions for a correct
installation, every external component (as pumps, valves, acoustic alarms system, pressure
switches, expansion tank) must be obtained by third parts according to the specifies of designer
and installer.
3.2 CONNECTIONS TO THE HEATING SYSTEM
Before the lighting of the thermal cooker it is necessary to make the connections to the heating
system. The use of the thermal cooker with empty or not connected to the system boiler causes
the irreversible damaging of the boiler itself. Anyway, it is necessary to connect the going
connector, the return connector and the discharge connector (necessary to empty the boiler in
case of maintenance).
3.3 AUXILIARY CONNECTIONS
According to the system you want to install, there are some auxiliary connectors for facultative
use, but sometimes necessary. These are the connectors for the thermal discharge circuit, the
connector for the detector of thermal discharge valve and the connector for the thermostat. If not
used, these connectors must be covered.
3.4 THERMOSTAT
LT - ST thermal cookers are not endowed with thermostat. If you want to create a forced
circulation based heating system it is necessary to use an external thermostat to control the
working of the circulation pump of the system, according to the temperature of the water in the
boiler. The thermostat must be placed external to the device with the temperature detector
inserted in an suited cockpit in the rear part of the thermal cooker. The thermostat must
guarantee the working of the pump each time the water temperature of the boiler exceeds the set
temperature.
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.
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