Immergas MAIOR EOLO - Page 18

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1-28
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B
C
D
Maior Eolo 24
Maior Eolo 28
Maior Eolo 32
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A
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INSTALLERUSERMAINTENANCE TECHNICIAN
1.21 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 circulation
pump is already tted with a capacitor.
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. 25 Fig. 1-29). If nec-
essary, the by-pass can be adjusted according to
system requirements from a minimum (by-pass
excluded) to a maximum (by-pass inserted)
represented by the graph (Fig. 1-28). Make the
regulation using a at head screwdriver, turn
clockwise and insert the by-pass, anti-clockwise
it is excluded.
Head available to the system.
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)Head (kPa)Head (kPa)
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
STD.002998/004