Circulation Pump - Immergas Maior Eolo 24 4E Installation Manual

1.16 CIRCULATION PUMP.

The boilers are supplied with a built-in circula-
tion pump with 3-position electric speed control.
The boiler does not operate correctly with the
circulation pump on first speed. To ensure opti-
mal boiler operation, in the case of new systems
(single pipe and module) it is recommended to
use the pump at maximum speed. The pump is
already fitted with a condenser.
Total head available to the system.
Maior Eolo 24 4 E
Maior Eolo 28 4 E
Maior Eolo 32 4 E
Pump release. If, after a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor shaft
using a screwdriver. Take great care during this
operation to avoid damage to the motor.
A
B
C
D
Flow rate (l/h)
A
B
D
C
Flow rate (l/h)
A
B
C
D
Flow rate (l/h)
By-pass regulation (part. 25 Fig. 1-34). If neces-
sary, the by-pass can be regulated according to
system requirements from a minimum (by-pass
excluded) to a maximum (by-pass inserted)
represented by the graphics (Fig. 1-33). Make
the regulation using a flat head screwdriver, turn
clockwise and insert the by-pass, anti-clockwise
it is excluded.
A = Head available to the system at
maximum speed with by-pass
excluded.
B = Head available to the system at
maximum speed with by-pass
inserted.
C = Head available to the system
at second speed with by-pass
excluded.
D = Head available to the system
at second speed with by-pass
inserted.
ES
PT
GR
CZ
HU
IE
Fig. 1-33
155