Immergas Maior Eolo 24 4E - Page 18

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
INSTALLERUSER
MAINTENANCE TECHNICIAN
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.
e boilers are supplied with a built-in circula-
tion pump with 3-position electric speed control.
e boiler does not operate correctly with the
circulation pump on rst 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. e pump is
already tted with a condenser.
Pump release. If, aer a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor sha
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 at head screwdriver, turn
clockwise and insert the by-pass, anti-clockwise
it is excluded.
Head (kPa)Head (kPa)
Head (m H
2
O)Head (m H
2
O)Head (m H
2
O)
Flow rate (l/h)
Flow rate (l/h)
Flow rate (l/h)
Head (kPa)