16
Instruction for the installer
3.8 - DOMESTIC HOT WATER CONNECTIONS
(Model “C”)
WARNING!
Before connecting the boiler to the water
mains supply ensure 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.
The hot water distribution and domestic hot water supply
pipework must be connected to their respective ½ boiler pipe
connections C and F as indicated on page 13.
The pressure in the system must be between 1
and 2,5 bar (if the pressure is higher fit a reducing
pressure valve).
WARNING!
The hardness of the mains water supply
conditions the frequency with which the DHW
heat exchanger is cleaned.
In hard water areas the opportunity of fitting
an adequate scale reducing device for
domestic purposes for treating the mains water
supply to the boiler, in compliance to the DM
n°443 dated 21/12/90, should be taken into
consideration.
Where water hardness exceeds 15°f, a scale
reducing device is always recommended.
Ensure yourself that the system’s water and
central heating piping are not used as 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.
3.9 - PIPEWORK CONNECTIONS
CH flow
DHW Out
Mains
Gas
Supply
Mains Water In
CH return
