Immergas 3.029660, Instruction Booklet And Warning

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1.15 EXPANSION VESSEL
The water held in the accumulator of the SOLARSMART solar
collector is subjected to notable thermal excursions and, as a result,
important variations in volume.
The system is protected from the overpressure caused by these fluc-
tuations by the safety and one-way valve which, if necessary, opens
and allows the system to return to its correct working pressure.
Should the user wish to prevent the safety and one-way valve from
opening, it is advisable to use an EXPANSION VESSEL, suitably
sized according to use.
When the EXPANSION VESSEL is assembled, the overpressure
that can originate in the accumulation tank is absorbed by vessel
deformation, therefore the safety valve does not need to intervene
in normal conditions of use.
The EXPANSION VESSEL must be installed between the safety
and one-way valve and the inflow connection of the solar collector.
The EXPANSION VESSEL must be connected using all the me-
thods indicated for heating systems, therefore it must be directly
connected to the accumulator (without placing valves or taps
between them) and pre-set at a pressure of 0.5 bar less than that
of the system working pressure.
The EXPANSION VESSEL and its pre-set values must be sized
using the normal formulas that can be found in normal hydraulic
documents.
The expansion vessel must be installed by specialist technicians
and/or companies.
1.16 STARTING
Use of the covering sheet
The SOLARSMART integrated solar collector is supplied with a
plasticizer-free PVC covering sheet which serves the purpose of
blacking out the surface that captures the solar irradiation. This
will prevent the product from overheating from solar exposure
in the event of the collector being installed but not connected to
the water mains (therefore with no water inside), or in any other
situation where the collector volume is wholly or partially empty.
The solar collector is not designed for exposure to direct sunlight
unless it is filled with water. If to the contrary, the direct irradia-
tion on the empty product will cause overheating and subsequent
damage to the internal components.
In the event of using a different sun protection system, make
sure that it is plasticizer-free in order to prevent damage to the
transparent cover.
The cover sheet must be kept in position from system
installation to starting. Do not remove it before having
filled the collector.
Exposure to the sun when the system is empty can
damage the product; in this case the manufacturer
will not recognise any guarantee rights.
If the solar collector should not be covered at the time of com-
missioning, cover it with the supplied cover or with a suitable
blackout system and wait no less than 3 hours before starting the
system loading operation.
In any case, the system must be charged with the cold system
(covered collector or early in the day).
Keep the cover sheet for future use.
If used again, position the sheet carefully, making
sure that the smooth grey PVC side is turned towards
the outside.
Image of the sticker on the cover sheet
ATTENTION
ONLY EVER REMOVE THE PROTECTION AFTER HAVE
FILLED THE SYSTEM WITH WATER.