Circulation Pump; Kits Available On Request - Immergas EOLO STAR 24 4E Instructions And Warnings

1.22 CIRCULATION PUMP.

The boilers are supplied with a built-in circulation pump with
three-position electric speed control. The boiler does not opera-
te correctly with the circulation pump on first speed. To ensure
optimal boiler operation, in the case of new systems (single pipe
and module) it is recommended to use the pump at maximum
speed. The circulation pump is already fitted with a condenser.
Pump release. If, after a prolonged period of inactivity, the circu-
lation 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 adjustment (Part. 24 Fig.29). If necessary, the by-pass
can be adjusted according to system requirements from a mi-
nimum (by-pass excluded) to a maximum (by-pass inserted)
represented by the graph (Fig. 28). Make the adjustment using a
flat head screwdriver, turn clockwise and insert the by-pass; by
turning it anti-clockwise it is excluded.
Head available to the system.
Y1
Key:
X1 = Flow rate (l/h)
Y1 = Head (kPa)
Y2 = Head (m H O)
2
26
D
B
C
X1
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.

1.23 KITS AVAILABLE ON REQUEST.

• Connection unit kit (on request). The kit includes pipes, fittings
and cocks (including gas cock), to carry out all connections to
the boiler system.
• System cut-off valve kits with or without inspectionable filter
(on request) The boiler is designed for installation of system
interception cocks to be placed on flow and return pipes of the
connection assembly. This kit is very useful for maintenance
because it allows to empty just the boiler without having to empty
the entire system. Moreover, the version with filter preserves the
functioning characteristics of the boiler thanks to its inspectio-
nable filter.
• Polyphosphate dispenser kit (on request). The polyphosphate
dispenser reduces the formation of lime-scale and preserves
the original heat exchange and domestic hot water production
conditions. The boiler is prepared for application of the polypho-
sphate dispenser kit.
The above-mentioned kits are supplied complete with instructions
for assembly and use.
A
Y2
28