Immergas EOLO STAR 24 4E - Circulation Pump; Kits Available on Request

28
Y1
Y2
X1
A
B
C
D
26
INSTALLER
USER
MAINTENANCE TECHNICIAN
TECHNICAL DATA
1.22 CIRCULATION PUMP.
e boilers are supplied with a built-in circulation pump with
three-position electric speed control. e boiler does not opera-
te correctly with the circulation pump on rst 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. e circulation pump is already tted with a condenser.
Pump release. If, aer a prolonged period of inactivity, the circu-
lation 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 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
at head screwdriver, turn clockwise and insert the by-pass; by
turning it anti-clockwise it is excluded.
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.
Key:
X1 = Flow rate (l/h)
Y1 = Head (kPa)
Y2 = Head (m H
2
O)
1.23 KITS AVAILABLE ON REQUEST.
• Connection unit kit (on request). e kit includes pipes, ttings
and cocks (including gas cock), to carry out all connections to
the boiler system.
• System cut-o valve kits with or without inspectionable lter
(on request) e boiler is designed for installation of system
interception cocks to be placed on ow and return pipes of the
connection assembly. is 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 lter preserves the
functioning characteristics of the boiler thanks to its inspectio-
nable lter.
• Polyphosphate dispenser kit (on request). e polyphosphate
dispenser reduces the formation of lime-scale and preserves
the original heat exchange and domestic hot water production
conditions. e boiler is prepared for application of the polypho-
sphate dispenser kit.
e above-mentioned kits are supplied complete with instructions
for assembly and use.