Unical ALKON 50 kW, Installation And Servicing Manual

Page: 18 / 64

18
Instructions for the installer
3.7 - FLOW AND RETURN PIPE CONNEC-
TIONS
The CH flow and return circuits have to be connected to the
boiler via the respective connections
1” or 1’’¼
as indicated
on page 16.
When determining the size of the CH circuit pipes it is
essential to bear in mind the pressure losses induced by any
of the system’s components and by the configuration of the
same system.
The route of the piping has to be conceived taking all the
necessary precautions in order to avoid air locks and to
facilitate the continuous purging of the system.
GATE
VALVES
R
M
WARNING!
IT IS ABSOLUTELY FORBIDDEN TO FIT ON-OFF
VALVES ON THE GENERATOR TO THE FORE
OF THE SAFTEY DEVICES
WARNING!
Before installing the boiler we recommend
that the system is flushed out with a suitable
product, in order to eliminate any metallic
tooling or welding residues, oil and grime
which could reach the boiler and affect the
proper running of the boiler.
Non-observance of these instructions could
cause injury to persons, animals or damage
to property. The manufacturer shall not be
held liable for any such injury and/or damage.
Ensure yourself that the system’s piping is not
used as the earth clamps for the electrical or
telephonic system. They are absolutely
unsuitable for this use. In a short time this could
cause serious damage to the piping, boiler
and radiators.