Installation, use and maintenance guide
COMPACT S18 EVO
Page 18
ENG
ATTENTION: it is mandatory to earth the generator. If this instruction is not observed serious damage, which
is not covered by warranty, will result to the body of the appliance. Have a skilled electrician check the
earthing. There must be no electric potential (Volt) between the generator earth and the system’s real earth
(earth plate). To prevent electrochemical corrosion of the appliance body do not use galvanised pipes and
fittings. Other materials must be earthed with special earthing cables in order to obtain a unipotential
earthing system.
ATTENTION: Sensor S2 and sensor S1 must be connected to the dedicated clamps on the terminal block as indicated in the
diagram. To view the readings of Sensors S1 and S2 on the display it is necessary to activate the THERMOCONTROL function.
5.7 INSTRUCTIONS FOR EXECUTING THE HYDRAULIC SYSTEM CLOSED EXPANSION TANK
To install the system with a closed expansion tank refer to the requirements laid down in EN 10412-2:2009 for appliances with
nominal heat output not exceeding 35 kW or in the Ministerial Decree Collection R edition 2009 for appliances with nominal he at
output exceeding 35kW.
The hydraulic system must be installed by qualified personnel who are familiar with the standards mentioned above and who have
the appropriate professional requirements to release the declaration of conformance in accordance with Ministerial Decree n° 37 of
22 January 2008.
The generator is already supplied with the following safety devices on board:
a) closed expansion tank for generator protection only*
b) ordinary safety valve 3 bar, not I.S.P.E.S.L. approved
c) an automatic reset temperature limiting device;
This is an automatic adjustment device that interrupts the fuel supply to the generator when the water reaches the
temperature setting. The system starts up again automatically when the water temperature drops below the preset value.
d) a manual reset temperature limiting safety device;
This is an automatic device that interrupts the fuel supply when the water reaches the maximum permissible temperature.
The fuel infeed will only restart when the water temperature drops below a preset value and after the device has been
reset manually.
e) circulation system.
The appliance is fitted with a circulating pump connected to the return pipes which is controlled directly by the
generator’s control board.
*
An additional closed expansion tank must be series-connected to the generator as protection for the system.
The nominal volume of the additional closed expansion tank must be sized in relation to the volume of expansion of the water
contained in the system. Thermorossi prescribes that the size of the additional closed expansion tank must be equal to 10% of the
water contained in the system.
The previous chapter does not replace the above standards to which it makes reference. The qualified installer must in
any case be fully aware of the above standards and their amending versions
.
