Instruction manual

20
Instructions for the installer
WARNING!
IT IS ABSOLUTELY FORBIDDEN TO FIT ON-
OFF VALVES ON THE BOILER BEFORE THE
SAFTEY DEVICES
CH pressure relief valve drainage
In correspondence to the CH pressure relief valve, provi-
sion should be made to install a discharge pipe with a
funnel and a siphon which lead to an adequate drainage.
The drainage has to be controllable by sight.
WARNING!
If this precaution is not taken it could lead to
injury to persons, animals or damage to
property. The manufacturer shall not be held
liable for any such injury and/or damage
Expansion vessel connection
The PK...X 2S boilers are suitable for opera-
ting with a forced water circulation with an
open or closed water tank.
An expansion vessel is always needed
because it compensates the increase in
water volume caused by heating.
Filling /drainage connection
The boiler can be filled and drained by providing an appro-
priate external cock on the system's return pipe T5.
3.11 - SYSTEM CONNECTION
WARNING!
Before connecting the boiler to the heating
system 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.
Do not use any solvents for flushing out the
system as they could damage the system
and/or its components.
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 dama-
ge.
The CH flow and return circuits have to be connected to the
boiler via the respective connections as indicated on page
8.
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 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
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.