Idiomas disponibles
Idiomas disponibles
IMPORTANT - frost protection
If the solar circuit TIGHTNESS TEST is done with pure water without added antifreeze (INADVISABLE), make sure to empty the
circuit COMPLETELY at the end of the test and immediately fill it with a solution containing ANTIFREEZE or a suitable premixed
solar fluid (e.g. FERSOL LT or ULTRA LT).
The rule for calculating the frost protection level for a solar system is to consider the MINIMUM DESIGN TEMPERATURE of the
place for heating systems (e.g. Law 10/91) SUBTRACTING ANOTHER 7° for "windchill" (rapid heat loss due to wind) and the
"clearsky" effect (night radiance with clear sky) on the collector installed on the roof.
NEVER use solar circuit automatic filling devices directly connected to the mains water, as these do not allow the replenishing
of any small leaks (even prolonged) with the correct added mixture of antifreeze, diluting the level of protection and putting at
risk the integrity of the collector at the connections (plastic unions) and, in serious cases, the internal piping.
Any devices for replenishing the specific fluid solar can be used only in the presence of good quality mains water (absence of
sludge, hard or brackish water) after a chemical-physical analysis, and in any case providing for a specific antifreeze dosing
pump to add a suitable mixture of quality equal to the solar mixture of the original filling.
The manufacturer declines any liability for damage caused by frost whenever the
above COMPULSORY instructions are ignored.
Deaeration
To install an automatic deaeration system, it is necessary to remove (by unscrewing) the manual deaerator and fit the valve and
automatic deaerator (optional kit code 0722370 for model VHm) as shown in the figure.
If the solar system is deaerated with an automatic deaerator (accessory), close the ball valve after deaeration.
EN
46
3
4
Cod. 3541I450 - Rev. 03 - 02/2017
VHM 2.1 - 2.7
2
1
Legend
1 - Manual deaerator
2 - Ball valve
3 - Automatic deaerator
4 - O-ring
