Accumulation - AERMEC NRA 0800 Manual Tecnico

9.3 PRESSURE DROPS,
WATER FILTER
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
h e a t e r s a r e n o t i m m e d i a t e l y
necessary, the plastic plugs must be
replaced with suitable metal plugs.
10. 1 MAXIMUM WATER CONTENT
in the system
The t able below indicat es t he
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
kPa

ACCUMULATION

10
water temperature. If the effective
wat er cont ent of t he hydraulic
system (including the accumulation
Altezza idraulica
Taratura del vaso di espansione
Valore di riferimento contenuto acqua
Valore di riferimento contenuto acqua
Valore di riferimento contenuto acqua
Acqua glicolata Temp. acqua °C
max.
10% 40
10% 60
10% 85
20% 40
20% 60
20% 85
35% 40
35% 60
35% 85
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.
Water flow rate m 3 /h
tank) is greater than that shown in
the operational conditions table,
another, additional expansion tank
H m 30 25
bar 3.2 2.8
l (1)
2. 1 74 2.646
l (2)
978 1190
l (3)
510 622
Coefficiente
di correzione
min.
-2 0,507
-2 0,686
-2 0,809
-6 0,434
-6 0,604
-6 0,729
-6 0,393
-6 0,555
-6 0,677
20 15 ≥ 12.25
2.3 1.8 1.5
3. 1 18 3590 3852
1404 1616 1732
732 844 904
Condizione di
riferimento
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
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