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5.2 Pressure loss
Circulating pumps Head/Pressure loss
A = Boiler pressure loss
1 -2 - 3 = Circulating pump speed
H [m H
O]
2
8
7
3
6
5
2
4
3
1
2
1
0
0
5.3 Technical data table
Model
Number of elements
Max. heating capacity
Min. heating capacity
Max. heat output
Min. heat output
Pmax efficiency (80-60°C)
Efficiency 30%
Efficiency class Directive 92/42 EEC
Max. working pressure in heating
Min. working pressure in heating
Max. heating temperature
Heating water content
Heating expansion tank capacity
Heating expansion tank prefilling pressure
Max. working pressure in DHW
Min. working pressure in DHW
DHW flow rate t 25°C
DHW flow rate t 30°C
Protection rating
Power supply voltage
Electrical power input
Electrical power input in hot water production
Empty weight
Combustion chamber length
Combustion chamber diameter
Pressure loss on fume side
46
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0.5
1
Q [m
fig. 37 - Pressure losses
no.
kW
kW
kW
kW
bar
bar
litres
litres
bar
bar
bar
l/min
l/min
V/Hz
mm
mm
mbar
cod. 3541I070 - Rev. 04 - 04/2018
ATLAS D SI UNIT
A
1.5
2
3
/h]
ATLAS D 25 SI UNIT
3
Hs 28.3 / Hi 26.6
Hs 22.4 / Hi 21.0
25.0
20.0
%
Hs 88.2 / Hi 93.9
%
Hs 92.2 / Hi 98.2
6
0.8
°C
110
20
1
9
0.3
14.3
11.9
IP
X0D
230/50
W
200
W
200
kg
160
350
300
0.11
2.5
3
ATLAS D 37 SI UNIT
4
Hs 41.9 / Hi 39.4
(Q)
Hs 22.3 / Hi 21.0
(Q)
37.0
(P)
20.0
(P)
Hs 88.3 / Hi 94.0
Hs 91.5 / Hi 97.4
6
(PMS)
0.8
110
(tmax)
25
10
1
9
(PMW)
0.3
21.2
17.7
X0D
230/50
200
200
200
450
300
0.35
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