Immergas HERCULES Condensing 26 2 E Manual page 15

Technical Documentation
Central heating circuit.
HERCULES Condensing functioning with 1 pump (Zone 1)
(standard configuration).
STORAGE TANK
COILS
RETURN
STORAGE TANK
COILS
FLOW
Following a central heating type request, the P.C.B. starts the
boiler pump (2), powers the central heating pump (4) and
powers the electric 3-way valve motor (3) causing it to shift
to the central heating position.
In this way the passage towards the storage tank coil is closed
and that towards the hydraulic manifold is opened (1) into
which the water from the primary circuit is introduced.
The hot water is introduced directly into the system through
the flow (MA1) and return (RA1) pipes via the central heat-
ing pump (4).
Thanks to functioning with the two pumps (2 and 4) and
the use of an open hydraulic manifold (1) the water flow rate
and the head available are particularly high (see flow rate/head
graphics).
STHCkW ed 04/09
Technical Documentation
1
4
2
3
13
RA1
MA1
HERCULES Condensing Export