16
STEkW ed 12/06
EOLO Maior kW
Technical Documentation
Technical Documentation
1
2
1
1
Primary
circuit
delivery
Primary
circuit
return
D.h.w. flow switch (1).
When domestic hot water is drawn at a rate of 2 litres/min or
less and dynamic pressure is 0.3 bar, the d.h.w. flow meter (1)
enables the boiler to work in the d.h.w. mode.
This takes place by means of a magnet that, upon lifting when
it is hit by the flow of domestic cold water, moves closer to
an electrical contact
(reed relay)
causing it to move due to the
magnetic effect.
When the contact closes, located outside the pipe through
which the water flows, it enables the integrated board to start
the domestic hot water priority functioning phase.
It is fixed with a pin to the valve supporting plate.
A flow limiting device (2) is mounted on the outlet of the
d.h.w. flow switch, 7.55 l/min
(2 bar)
for model 24 kW, 9.0
l/min
(2 bar)
for model 28 kW and a 11.28 l/min
(2 bar)
for
model 32 kW.
D.h.w. exchanger.
This is a water-water exchanger consisting of stainless steel
plates placed on top of each other
(16 in the 24
kW version,
20 in the 28 kW version, and 22 in the 32 kW version)
on the
surface of which flows, in counter current, the water of the
boiler circuit and the domestic cold water and through which
heat exchange occurs between the two liquids.
For the hydraulic coupling four O rings (1) are used that al-
low direct coupling to the d.h.w. inlet body and to the d.h.w.
outlet body.
D.h.w.
outlet
D.c.w.
inlet
Domestic cold water
inlet
Summary of Contents for EOLO Maior kW
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