Immergas HERCULES Condensing 26 2 E Manual page 18

Technical Documentation
HERCULES Condensing functioning with 2 or 3 additional homogeneous zones (optional)
(configuration with high temperature zones kit).
STORAGE TANK
COILS
RETURN
STORAGE TANK
COILS
FLOW
Any division of the zone system (2 or 3) requires the assembly
of a relevant kit inside the casing, which envisions the use of
the zones management board (21) (see "Digital zones board"
functioning) and additional pumps to be used (max 2) with
that mounted as standard.
With the installation f these kits, the pumps (7 and 10) are
connected to the hydraulic manifold (1) (return) and to the
respective system flow pipe (flow) into which the primary
circuit water is introduced directly.
The return pipes of zones 2 or 3 are fitted tot he same hy-
draulic manifold (1) connected to the primary heat exchanger
return.
The functioning of each pump (7 and 10) depends on the
functioning request of the respective room thermostats (or CAR
for zone n. º 1) connected to the zones control unit (21).
For every additional zone the lit includes a pump, a system by-
pass (9 and 12) and a one-way valve (8 and 11) to be inserted
into the system flow pipe.
N.B.: Regarding the wiring diagram, settings, signals, etc. see
the "Zones digital control unit" technical sheet.
STHCkW ed 0409
Technical Documentation
21 10
7
16
8
11 12 9
RA3
MA3
RA2
MA2
RA1
MA1
HERCULES Condensing Export