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12 ENGLISH
HYDRAULIC SYSTEM
Certain concepts referring to the Italian UNI 10412-2 Standard are described in this chapter.
As previously described, when installing, all national, regional, provincial and town council Standards in force provided by the country in
which the appliance has been installed must be complied with.
When installing the generator, it is MANDATORY to adjust the system with a pressure gauge to display the water pressure.
TABLE OF SAFETY DEVICES FOR CLOSED VESSEL SYSTEM AND NOT PRESENT IN THE PRODUCT
Safety valve
p
Pump control thermostat (it is managed by the water probe and the board program)
p
Water temperature indicator (display)
p
Pressure transducer with display
X
Automatic circuit breaker adjustment switch (managed by board program)
p
Manometer
p
Water overheating automatic circuit breaker switch (block thermostat)
p
Circulation system (pump)
p
Expansion system
p
DSA thermal discharge coil
X
DSA valve (Automatic Safety Device)
X
INSTALLATION AND SAFETY DEVICES
The installation, relative system connections, commissioning and inspection of correct functioning must be carried out perfectly, in full
compliance with Standards in force, national, regional and municipal, as well as these instructions. For Italy, installation must be carried out by
professionally qualied sta (Ministerial Decree dated 22.01.08 n°37).
Extraame S.p.A. declines all responsibility for damage to objects and/or persons caused by the system.
TYPE OF SYSTEM
There are 2 dierent types of system:
Open vessel system and closed vessel system.
The product has been designed and built to work with closed vessel systems.
J
CHECK THAT THE PRELOAD OF THE EXPANSION VESSEL IS SET TO 1.5 BAR.
SAFETY DEVICES FOR CLOSED VESSEL SYSTEM
According to the UNI 10412-2 Standard in force in Italy, closed systems must feature the following: safety valve, pump control thermostat,
temperature indicator, pressure indicator, automatic temperature regulation device, automatic thermal cut-o switch (safety thermostat),
pump system, expansion system.
Pay attention to the correct sizing of the system:
Generator power compared to the thermal requirement
Possible need for a buer tank
12


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