Immergas EOLO Mini Technical Documentation Manual page 7

Technical documentation
- SAFETY DEVICES AND CONTROLS
System bypass (1) (optional)
Ensures circulation of water in the primary circuit
(between delivery and return) even when the high
resistance of the system does not permit.
It is fitted between the system delivery and return
connection pipes.
System filling valve
This cock is located between the boiler circuit and
the cold d.h.w. inlet and permits pressurising the
heating system
The housing is obtained in the lower part of the
three-way valve body to which it is screwed up.
(see no. "13" 3-way valve ).
System drain valve (3)
This is a brass cap featuring a hose connector
fitted (screwed) on the bottom part of the return
manifold (2).
By loosening this, the water of the primary circuit
can be externally released.
3-bar safety valve (4)
Prevents safety pressure being exceeded in the
circuit (3 bar).
It is connected in the front part of the manifold (2)
to which it is fitted on the side by a socket screw.
Operation of this valve causes water to run out of
the return pipe.
Automatic air vent (6)
Allows automatic expulsion of any gaseous
substances in the boiler circuit.
It is fitted to the delivery pipe of the pump directly
to the body.
Expansion vessel (7)
This compensates for any changes in volume
caused by water heating and permits restricting
pressure changes.
It is positioned on the right of the boiler alongside
the sealed chamber and has a pre-load pressure of
0.8 bar and a capacity of 6 l.
It is connected to the return manifold (2) by means
of a copper pipe (5) with threaded fittings.
STEME ed 07/03
7
Technical documentation
EOLO MINI