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Instructions for the installer
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For the correct operation of boilers AIREX is necessary to
provide a recirculation pump to prevent a return to low
temperature which could compromise the life of the boiler.
The UNICAL, to help its customers has therefore developed
a hydraulic kit for recirculation that enhances the function of
the circulating water in the boiler.
This kit is supplied as an option and is available by quoting
the order code on the model of your boiler.
fig. 18