ATLAS D SI UNIT
46
(1
5.2 Pressure loss
Circulating pumps Head/Pressure loss
A =
Boiler pressure loss
1 -2 - 3 =
Circulating pump speed
fig. 37 - Pressure losses
5.3 Technical data table
Model
ATLAS D 25 SI UNIT
ATLAS D 37 SI UNIT
Number of elements
no.
3
4
Max. heating capacity
kW
Hs 28.3 / Hi 26.6
Hs 41.9 / Hi 39.4
(Q)
Min. heating capacity
kW
Hs 22.4 / Hi 21.0
Hs 22.3 / Hi 21.0
(Q)
Max. heat output
kW
25.0
37.0
(P)
Min. heat output
kW
20.0
20.0
(P)
Pmax efficiency (80-60°C)
%
Hs 88.2 / Hi 93.9
Hs 88.3 / Hi 94.0
Efficiency 30%
%
Hs 92.2 / Hi 98.2
Hs 91.5 / Hi 97.4
Efficiency class Directive 92/42 EEC
Max. working pressure in heating
bar
6
6
(PMS)
Min. working pressure in heating
bar
0.8
0.8
Max. heating temperature
°C
110
110
(tmax)
Heating water content
litres
20
25
Heating expansion tank capacity
litres
10
Heating expansion tank prefilling pressure
bar
1
1
Max. working pressure in DHW
bar
9
9
(PMW)
Min. working pressure in DHW
bar
0.3
0.3
DHW flow rate
'
t 25°C
l/min
14.3
21.2
DHW flow rate
'
t 30°C
l/min
11.9
17.7
Protection rating
IP
X0D
X0D
Power supply voltage
V/Hz
230/50
230/50
Electrical power input
W
200
200
Electrical power input in hot water production
W
200
200
Empty weight
kg
160
200
Combustion chamber length
mm
350
450
Combustion chamber diameter
mm
300
300
Pressure loss on fume side
mbar
0.11
0.35
0
1
2
3
4
5
6
7
0
0.5
1
1.5
2
Q
[m
3
/h]
2.5
3
8
H
[m H
2
O]
3
2
1
A
cod. 3541I070 - Rev. 04 - 04/2018
