6
STESkW ed 05/06
EOLO Star 23 kW
Technical Documentation
Technical Documentation
Safety devices and controls.
Automatic system by-pass (4).
This device ensures circulation in the central heating circuit
even when this is prevented by the system’s high resistance.
It works between the delivery and return of the central heating
circuit and is accessible after having unscrewed the cap (5) on
the brass manifold’s hook (1).
System water pressure switch (7).
This is an absolute pressure switch that reads the pressure inside
the central heating circuit.
It is housed in the manifold (1) and coupled to a microswitch
that prevents the boiler working when the pressure measured
is below 0.3 bar.
This prevents the bithermal exchanger from overheating.
Filling valve (3).
This valve is between the boiler circuit and the domestic cold
water inlet and permits pressurisation of the central heating
system.
It is located underneath the brass manifold (1) to which it is
screwed.
3-bar safety valve (2).
This valve prevents the safety pressure being exceeded in the
circuit (3 bar).
It is on the front of the manifold (1), secured to it on the side
with an Allen screw.
When this valve triggers, water exits from the boiler return
pipe.
Automatic air vent (8).
It automatically expels any gaseous substances from the cir-
cuit.
It is mounted on the pump’s delivery side.
Expansion vessel (9).
It compensates for variations in volume as a result of heating
the water which also limits pressure variations.
It has a 6-litre capacity
(3.95 useful litres)
and a pre-load pres-
sure of 1.0 bar.
It is located on the right of the boiler alongside the sealed
chamber and is connected to the return manifold (1) by a
copper pipe (6) with threaded fittings.
8
9
6
7
4
5
1
2
3
6
Central
heating
exchanger
delivery
Pump
return
System
delivery
System
return
http://serviceimmergas.ro
Summary of Contents for EOLO Star 23 kW
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