17
Instruction for the installer
By-Pass CLOSED
rotate the screw in a
clockwise direction
By-Pass OPEN
rotate the screw in a
anti-clockwise direction
Alkon C
By-pass adjustment
clockwise
anti-clockwise
By-Pass
CLOSED
Alkon R
By-pass adjustment
By-Pass
OPEN
3.7 - CENTRAL HEATING CONNECTIONS
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.
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
damage.
The CH flow and return circuits have to be connected to the
boiler via the respective connections ¾” M and R as indicated
on page 14.
When determining the size of the CH circuit pipes it is essential
to bear in mind the pressure losses induced by the radiators,
any eventual thermostatic radiator valves, lockshield valves
and by the system’s layout.
The routing of the piping has to be laid down 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 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.
The boiler is fitted with an automatic BY-PASS (differential valve
with a flow rate of about 150 l/h) which always ensures a
minimum water flow rate to the heat exchanger even if, for
example, all the thermostatic valves fitted on the heating system
are closed.
It is possible to adjust the by-pass by acting on the adjustment
screws.
Pressure relief valve drain pipe
In correspondence to the heating pressure relief valve provision
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.
Summary of Contents for ALKON R 24
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