Jolly Mec J20 Ficha De Montaje, Uso Y Mantenimiento página 59

The pressure relief valve (C) must always be
connected to a water drain pipe, to avoid
wetting the floor in case of intervention. The
tube must be capable of with standing high
temperature and pressure.
The kit task ( preassembled by the manufacturer's if
requested by the customer) is to heat the domestic
water from the water line of the dwelling. In the
moment in which there is request for opening a hot
water tap, the flow switch commands the diverter
valve to convey the hot water contained inside of the
boiler towards the plate heat exchanger.
Directions for use
If the installation of the boiler provides interaction
with another existing system complete with a
heater (gas boiler, gas boiler, oil boiler, etc..)
consult qualified personnel who can then answer
the compliance of the system, as envisaged by the
law in force.
Flushing the system
In accordance with the UNI-CTI 8065 is strongly
recommended to wash the entire system before
connecting it in order to get rid of residues and
deposits. After flushing the system to protect it
against corrosion and deposits, it is recommended
the use of inhibitors. Upstream from the Boiler,
always install shutters so as to disconnect it from
the plumbing system should it be necessary to
move it, or when it requires routine and/or special
maintenance.
FILLING TAP
AIR VENT VALVE
Filling the boiler
Once all the water connections, proceed
to check pressure seal by filling the boiler.
During this operation, any air in the system is
released from the automatic vent valve.
The filling pressure of the system when COLD must
be 1 bar
During operation, if the system pressure
.
drops (due to evaporation of dissolved gases in the
water) to values lower than the minimum indicated
above, the user must use the filling tap to bring
the pressure back up to its normal pressure.
For proper operation of the boiler when HOT, the
pressure in the boiler must be 1,1 bar.
Water Characteristics
The characteristics of the water used to fill the
system are very important to prevent the build-up
of mineral salts and the formation of incrustations
along the pipes, in the boiler and in the heat
exchangers. Therefore, please get your plumber's
advice concering:
• Hardness of water circulating in the system, to
prevent problems of incrustation and limescale,
especially in the domestic water heat exchanger
(>15° French).
• Installation of a water softener (if water hardness
> 15° French).
• Filling the system
(demineralised).
If you have very extensive system, with a large
amount of water, or which require frequent
refilling, it is recommended the installation of
water softening system. It 'should be noted that
the encrustations drastically reduce performance
because of their low thermal conductivity.
with treated water
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