Immergas MAGIS HERCULES PRO Manual page 78

Constant head (ΔP C).
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A = Head available at speed Min ÷ Max
B = Power absorbed by the system pump (dotted area)
37.1 ZONE 1 (DIRECT) FLOW CIRCULATOR PUMP SETTINGS AND CONFIGURATIONS
MAGIS HERCULES PRO 4-6-9 is equipped with 2 circulator
pumps with speed regulator.
As for the circulator pump located on the primary circuit,
the factory settings are generally suitable for the various plant
applications.
On the other hand, the system circulator pump controls the
room heating or cooling requests downstream of the hydraulic
manifold.
In fact, the pump is equipped with electronic control that allows
to set advanced functions.
For proper use one must select the most suitable type of oper-
ation for the system.
By rotation, it is possible to select the following pump control mode:
Fixed speed I, II, III.
Proportional head I, II, III.
Constant head I, II, III.
- Fixed speed
Adjusts the pump speed in fixed mode.
It is possible to set 3 different speeds:
I: Minimum Speed.
II: Intermediate speed.
III: Maximum speed (factory set speed).
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MAGIS HERCULES PRO 4-6-9
WILO PARA 15-7 CM 130
A
400 600 800 1000 1200
Flow rate (l/h)
B
1400 1600 1800 2000 2200
X1
- Proportional head (ΔP-V)
This allows the pressure level (head) to be proportionally reduced
as the system heat demand decreases (flow rate reduction).
Thanks to this function, the electric power consumption of the
circulator pump is reduced further: the energy (power) used by
the pump decreases according to the pressure level and flow rate.
With this setting, the pump guarantees optimal performance in
most heating systems, proving particularly suitable in single-pipe
and two-pipe installations. Any noise originating from the water
flow in the pipes, valves and radiators is eliminated by reducing
the head. Optimal conditions for thermal comfort and acoustic
well-being.
- Constant head (ΔP-C)
The circulator pump maintains the pressure level (head) constant
as the system heat demand decreases (flow rate reduction). With
these settings, the circulator pump is suitable for all floor systems
where all the circuits must be balanced for the same drop in head.
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EEI ≤ 0.20-Part.3