Unical MODULEX EXT 100, Инструкции по установке и обслуживанию

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44
Instructions for the installer
3.25- FILLING THE SYSTEM
Warning!
Do not mix the CH system’s water with anti-
freeze or anti-corrosion solutions using wrong
concentrations! It could cause damage to the
washers and could provoke noise during normal
boiler operation.
UNICAL refuses all liability for injury to persons,
animals or damage to property deriving from not
having respected the above mentioned recom-
mendations.
For filling-up the system a filling tap has to be foreseen on
the system return pipe.
The filling-up can also be made through the draining tap on
the boiler return manifold.
Never use such a tap to drain the system, since the system dirt
could gather in the boiler and compromise its operation. The
system itself shall be equipped with its own draining tap, whose
size depends on the system capacity. The application of a filter
on the return pipe to the boiler is advisable.
EXAMpLE OF FILLING-Up SYSTEM MANIFOLD
Filling group with pRV
IMpORTANT NOTE
Once the system has been filled up
at the right filling pressure, the filling
group has to be closed.
3
.26 - BOILER FREEzE PROTECTION
Should the flow temperature (measured at global flow tempera-
ture NTC) decrease under 7°C, the system pump is set up. Shoul
temperature decrease to under 3°C, all modules will start at min.
output until the return temperature reaches 10°C.
Such protection device is exclusively for the boiler. For the pro-
tection of the system, a second freeze protection thermostat is
necessary to switch on the heating system pump.
To protect the C.H. system from freezing when boiler is not in
operation during cold season, it is necessary to add to the C.H.
system water an anti freezing solution.
NB: The antifreezing solution must be compatible with the
materials present in the system, and mainly with the
aluminum.