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The ball valve mounted on the inlet pipe must be open in normal system
operating conditions in order to allow water to be added to the boiler. It
may be closed when it is necessary to drain the system.
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For connections of the various parts shown in the diagrams, please read
the following paragraph carefully.
i
The delivery and return pipes have a diameter of ¾".
The expansion vessel must be made of a covered vessel located above the
highest point reached by the water in the system.
The safety, inlet and outlet pipes must be protected from ice where this may
occur.
The safety pipe must allow the highest part of the generator to be in contact
with the atmosphere and not have reverse gradients, except for the section
intended to lead into the upper part of the expansion vessel.
The inlet pipe must allow the lowest part of the generator to be in contact with
the lowest part of the expansion vessel and must not have reverse gradients
capable of preventing circulation by gravity in the circuit (safety and inlet pipes,
stove, expansion vessel).
The outlet pipe in contact with the outside must have a section at least equal to
that of the safety pipe. The overflow pipe may also be used as an outlet pipe
provided that it has a section no longer than that of the safety pipe.
"
Our generator must not be mounted inside closed expansion vessel
circuits.