18
A
B
C
D
Maior Eolo 24 4 E
Maior Eolo 28 4 E
Maior Eolo 32 4 E
A
A
B
B
C
C
D
D
1-29
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
Total head available to the system.
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.
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.
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.
By-pass regulation (part. 26 Fig. 1-30).
If ne-
cessary, 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. 1-29). Make
the regulation using a flat head screwdriver, turn
clockwise and insert the by-pass, anti-clockwise
it is excluded.
H
ea
d (kP
a)
H
ea
d (kP
a)
H
ea
d (m H
2
O)
H
ea
d (m H
2
O)
H
ea
d (m H
2
O)
Flow rate (l/h)
Flow rate (l/h)
Flow rate (l/h)
H
ea
d (kP
a)
Содержание Maior Eolo 24 4E
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