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9 Installation on appliances that are old or that need to be updated
When the solar storage cylinders Riello 7200/2 HV PLUS are
installed on appliances that are old or that need to be
updated, check that:
- The installation comes with the safety and control com-
ponents in compliance with the specific regulations
- The appliance has been washed, cleaned of mud and
grime, de-aerated and the water seals have been
checked
- There is a treatment system for when the supply/make-
up water is particular (the values in the table can be
used as reference values).
10 First commissioning
Before the start-up and before testing the storage cylinder, it is absolutely necessary to
check that:
- The domestic hot water circuit supply taps are open
- Any water connections which connect to the boiler and to the water unit of the solar system have been carried out
correctly
- The procedure for washing and filling up the solar heating circuit with the water-glycol has been carried out correctly,
and the equipment has been de-aerated at the same time.
The transfer of heat into the solar heating circuit takes
place when the temperature of the solar collector is high-
er than that of the storage cylinder. Therefore in managing
the solar equipment the exact temperature is not impor-
tant, but rather the temperature difference.
- Set the temperature difference between the collector
and the storage cylinder (see the instruction manual of
the regulator).
- Commission the boiler for the auxiliary heating of the
storage cylinder.
At the start-up make sure that:
- The flow rate of the solar heating circuit is 30 l/h per m2
of collector surface
- The solar heating circuit is completely vented
- The cold pressure of the equipment is about 3 bar
- The safety valves intervenes at 6 bar
- The piping of the hydraulic supply are insulated in full
respect of current regulations.
If all conditions have been met, restart the boiler and
storage cylinder and check the regulated temperature and
the amount of DHW that can be taken.
REFERENCE VALUES
pH
Electric conductivity
Chlorine ions
Sulphuric acid ions
Total iron
M alkalinity
Total hardness
Sulphur ions
Ammonia ions
Silicon ions
prog
9
Riello 7200/2 HV PLUS
6-8
less than 200 μS/cm (25°C)
less than 50 ppm
less than 50 ppm
less than 0.3 ppm
less than 50 ppm
less than 35°F
none
none
less than 30 ppm
A1
prog
3
2
4
1
5
6
0
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