21
9.3 PRESSURE DROPS,
WATER FILTER
kPa
10 ACCUMULATION
The versions with accumulation offer
different set-ups that vary on the basis
of the effective pressure that you
want to obtain, the characteristics of
the pumping unit, and the presence
or absence of holes for integrative
resistance.
The following tables show the main
characteristics of the components of
the hydraulic circuit, while the graphs
on these pages show the relative
pressures.
The accumulation tanks with holes
for heaters are equipped with plastic,
temporary closing plugs.
WARNING
Before start-up, the installer must
assemble the heaters. If these
heaters are not immediately
necessary, the plastic plugs must be
replaced with suitable metal plugs.
10.1 MAXIMUM WATER CONTENT
in the system
The table below indicates the
maximum water content, in litres,
of the hydraulic system, compatible
with the capacity of the expansion
tank supplied as standard. The values
shown in the table refer to three
conditions of maximum and minimum
water temperature. If the effective
water content of the hydraulic
system (including the accumulation
tank) is greater than that shown in
the operational conditions table,
another, additional expansion tank
Altezza idraulica
H m 30 25 20 15
≥ 12.25
Taratura del vaso di espansione bar 3.2 2.8 2.3 1.8 1.5
Valore di riferimento contenuto acqua l
(1)
2.174 2.646 3.118 3590 3852
Valore di riferimento contenuto acqua l
(2)
978 1190 1404 1616 1732
Valore di riferimento contenuto acqua l
(3)
510 622 732 844 904
Acqua glicolata Temp. acqua °C Coefficiente
di correzione
Condizione di
riferimento
max. min.
10% 40 -2 0, 507 (1 )
10% 60 -2 0, 686 (2)
10% 85 -2 0, 809 (3)
20% 40 -6 0,434 (1)
20% 60 -6 0,604 (2)
20% 85 -6 0,729 (3)
35% 40 -6 0,393 (1)
35% 60 -6 0,555 (2)
35% 85 -6 0,677 (3)
Working reference conditions:
(1) Cooling: max water temp. = 40°C, min water temp. = 4°C.
(2) Heating (heat pump): max water temp. = 60°C, min water temp. = 4°C.
(3) Heating (boiler): max water temp. = 85°C, min water temp. = 4°C.
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~
Water flow rate m
3
/h
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