Immergas HERCULES Condensing 26 2 E Manual page 21

Technical Documentation
N.B.: Regarding the wiring diagram, settings, signals, etc. see
the "Zones digital control unit" technical sheet.
Head available at the additional low temperature zone.
In functioning condition with mixed systems, the use of several
pumps guarantees a greater total flow rate to the system.
The graphics below represent the trend of the head available to
the low temperature zone system, depending on pump speed
and with the by-pass inserted between flow and return.
A - Head available to the additional zones (2nd zone) at maximum speed (standard for HERCULES Condensing ABT)
B - Head available to the additional zones (2nd zone) at 4,5 speed (standard for HERCULES Condensing ABT)
C - Head available to the additional zones (2nd zone) at 3 speed (standard for HERCULES Condensing ABT)
STHCkW ed 04/09
A
B
C
Technical Documentation
19
Flow rate Litres/h
HERCULES Condensing Export