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14
Technical
characteristics and dimensions
Th
e pump is not an integral part of the boiler. It is advisable to choose a
pump with a
flo
w rate and head of approximately 2/3 of its typical curve.
ARES TEC 550 ErP
Maxim
um flo
w rate in l/h (∆t = 15 K)
30.404
Nominal requeste
d flo
w rate in l/h (∆t = 20 K)
22.804
ARES TEC 900 ErP
Maxim
um flo
w rate in l/h (∆t = 15 K)
48.647
Nominal requeste
d flo
w rate in l/h (∆t = 20 K)
36.487
ARES TEC 440 ErP
Maxim
um flo
w rate in l/h (∆t = 15 K)
24.326
Nominal requeste
d flo
w rate in l/h (∆t = 20 K)
18.243
ARES TEC 770 ErP
Maxim
um flo
w rate in l/h (∆t = 15 K)
42.570
Nominal requeste
d flo
w rate in l/h (∆t = 20 K)
31.926
ARES TEC 660 ErP
Maxim
um flo
w rate in l/h (∆t = 15 K)
36.487
Nominal requeste
d flo
w rate in l/h (∆t = 20 K)
27.365
Th
e boiler pump must have head that can ensure circulator
flo
w rates
according to the circuit’s ∆t.
The pumps must be determined by the installer or
designer based on the data for the boiler and system.
2.4.2 DETERMINING THE PRIMARY CIRCUIT PUMP OR BOILER PUMP
EXAMPLE:
For a ∆T 20K, of an ARES Tec ErP 900 the maximum
require
d fl
ow rate is 10514 l/h.
From the head loss graph it is possible to deduce that
the pump must ensure a head of at least 1.6 m/H
2
O.
NOTE:
It is always advisable to set up a hydraulic compensator
between the boiler circuit and the system circuit. It
becomes ESSENTIAL if the system requires greater
fl
ow rates than the maximum allowed by the boiler,
i.e. ∆t below 15K.