Immergas EOLO Maior kW, Руководство пользователя

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9
STEkW ed 12/06 EOLO Maior kW
Technical Documentation Technical Documentation
Primary circuit (boiler circuit).
The primary circuit with relevant control and safety devices
is triggered each time there is a request for central heating
or domestic hot water.
Operation (see EOLO Maior kW).
The heat contained in the flue produced by combustion is ab-
sorbed by the copper blades of the primary water-gas exchanger
(6) which, in turn, transfers it to the water circulating inside
it by means of the boiler pump (15).
The water is transferred directly into the system or else can
be diverted inside the stainless steel instantaneous plate ex-
changer (3).
This depends on the position of the motorised 3-way valve
H
ead (kP
a)
Flow rate Litres/h
A
A = Head available to the system on maximum speed with the by-pass off (adjustment screw fully tightened)
B = Head available to the system on maximum speed (screw tightened 1.5 turns compared to the adjustment screw completely loose)
C = Head available to the system on maximum speed with the by-pass open (adjustment screw completely loose)
H
ead (m H
2
O)
EOLO Maior 24 kW
H
ead (kP
a)
Flow rate Litres/h
H
ead (m H
2
O)
EOLO Maior 28 kW - 28 kW X
B
C
A
B
C
(16) which, when idle, lets the water flow through the d.h.w.
exchanger (3); on the other hand, when responding to a heat-
ing request, the flow is diverted to the system delivery (M)
and return (R) pipes.
Flow-head graph.
The trend of the curve that represents the system’s flow-head
ratio depends on how fast the pump is working and on how
the system by-pass is adjusted. Depending on the position,
it provides the system with a higher or a smaller head. The
characteristic curves are shown in the following graphs.