Dal Zotto WANNA IDRO Manuel Utilisateur page 39

HYDRAULIC SYSTEM
Certain concepts referring to the Italian Standard UNI 10412-2 (2009) are described in this chapter.
As previously described, when installing, all national, regional, provincial and council Standards in force provided by the country in which the
appliance has been installed must be complied with.
During installation of the generator it is MANDATORY to adjust the system with a manometer in order to display the water pressure.
TABLE OF SAFETY DEVICES FOR CLOSED VESSEL SYSTEM AND NOT PRESENT IN THE PRODUCT
Safety valve
Pump control thermostat (it is managed by the water probe and the board program)
Water temperature indicator (display)
Pressure transducer with display
Automatic circuit breaker adjustment switch (managed by board program)
Pressure transducer with minimum and maximum pressure switch alarm
Water overheating automatic circuit breaker switch (block thermostat)
Circulation system (pump)
Expansion system
Pay attention to the correct sizing of the system:
Š generator power compared to the thermal requirement
Š possible need for a bu er tank
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
Š There are 2 di erent types of system:
Š Open vessel system and closed vessel system.
Š The product has been designed and made to work with closed vessel systems.
SAFETY DEVICES FOR CLOSED VESSEL SYSTEM
In accordance with the UNI 10412-2 (2009) regulation in force in Italy, all the closed systems must be tted with: safety valve, pump control
thermostat, temperature indicator, pressure indicator, automatic circuit breaker block switch (block thermostat), circulation system,
expansion system, and safety dissipation built-in to the generator with thermal safety valve (self-activated), if the appliance does not have a
temperature self-adjustment system.
CHECK THAT THE PRELOAD OF THE EXPANSION VESSEL IS SET TO 1.5 BAR.
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