lnstall the expansion tank in a suitable place and in way to prevent damage due to water leaks.
A safety valve must be present in the plant, with pressure calibration lower than or equal to the
maximum pressure of the tank and/or pressure tank;
absence of the safety valve with the max operating
pressure exceeded, can cause serious injury/damage to persons, animals and objects.
lnitial pre-charge pressure stated on the label and for standard applications;
ca n be regulated 0.2 bar
lower than the pressure switch start setting; within the range ±20%. The pre
-
charge must be controlled
(with calibrated mano meter a pplied to the valve) before prod uct insta llation.
Prevent corrosion of the painted tank by not exposing it to aggressive environments. Make sure that the
tank does not constitute a conductive part and that there are no stray currents in the plant in order to
prevent the risk of tank corrosion.
S. Maintenance.
Maintenance and/or re1>lacement must be performed by specialised and authorised technicians in
compliance with current national Standards, making sure that:
Ali plant electrical equipment is not live
The expansion tank has cooled down sufficiently
The expansion tank and/or pressure tank is completely drained of water and the air pressure is d ischarged
before performing any operat ions on the same. The presence of pre-charge air is very dangerous for the
projection of pieces, which can cause serious injury/damage to persons, animal and objects. The presence
of water in the tank increases its weight greatly.
Period ic checks:
Pre
-
charge
:
once a year
check that the pre-charge pressure is that lndicated on the label,
with tolerance of
+/
-
20%. IMPORT AN T: to perform the operation the water must be emptied completely from the tank
(empty tanks).
lf the tank and/or pressure tank is discharged, the pre
-
c
harge value must be taken to that indicated on the
label.
Once a year, visually check the lack of corrosion on the tank. The tank MUST be replaced in the event of
corrosion.
6. Safety precautions for residua! rlsks.
Failure to comply with the following provisions can cause lethal wounds, damage to objects and property
and make the tank unusable.
The pre-charge pressure must be regulated withln the range of 0.5-3.5 bar;
the initial value is for standard appllcations.
lt is prohibited to drill and weld the expansion tank and/or
pressure tank with flame. The expansion tank and/or pressure tank must never be uninstalled when in work
conditions. Do not exceed the maximum operating temperature and/or maximum pressure accepted. lt is
prohibited to use the expansion tank and/or pressure tank differently than its declared use. Every VAREM
expansion tank and/or pressure tank is tested, controlled and packaged before being dispatched. The
manufacturer is not liable for any damage caused by incorrect transport and/or handling if the most
suitable means are not used, which guarantee integrity of the products and safety of persons. VAREM DOES
NOT accept any type of responsibility for damage/injury to objects/persons deriving from dimensioning,
incorrect use, installation, improper use of the product ar of the integrated system.
Do not use the heatlng
ranges for santtary use.
