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CONTROL PANEL
General
Display
hydrometer
switch
The control panel is composed of: display, function selection keys, general switch and the
hydrometer it si placed in the lower left corner in front of the unit (see image above).
Using analogical hydrometer
The analogical hydrometer control panel has a dial with unit of measure in a bar, by 0 to 6
bar. The water pressure in the heating system is indicated by the index of the black arrow.
The optimum pressure for the system is between 1 and 1,5 bar.
More then 1,5 bar you can have a maximum pressure of the 2 bar (maximum expansion of
the system during the rise in temperature). More than 2 bar pressure the system is not in
the range of operation, and the mechanical safety valve (preset to 3 bar) can start to lose
water (to access the valves remove the knockout openings at the valves, see page 2
hydraulic installation diagram).
The minimum op rating pressure is 0,8 bar (+/-0,2 bar). The differential positive or negative
tolerance is due to the operation of the water pressure switch with fixed setting..
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