ATLAS D UNIT
50
EN
cod. 3541I080 - Rev. 00 - 04/2016
5.2 Diagrams
Circulating pumps Head/Pressure loss
- Circulating pump head with setting at "fixed speed”.
fig. 39
A
Boiler pressure losses
1 - 2 - 3
Circulating pump speed
- Circulating pump head with setting at "proportional head”.
fig. 40
A
Boiler pressure losses
5.3 Technical data table
Min
.
4
1
7
III
II
I
0
1
2
3
4
5
6
7
0
0.5
1
1.5
2
Q
[m3/h]
2.5
3
8
H
[m H2O]
3
2
1
A
Min
.
4
1
7
III
II
I
0
1
2
3
4
5
6
7
H
[m H
2
O]
Q
[m
3
/h]
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0.0
A
Data
Unit
ATLAS D
25 UNIT
ATLAS D
37 UNIT
Number of elements
no.
3
4
Max. heating capacity
kW
28.3
41.9
(Q)
Min. heating capacity
kW
22.4
22.3
(Q)
Max. heat output in heating
kW
25
37
(P)
Min. heat output in heating
kW
20
20
(P)
Pmax efficiency (80-60°C)
%
93.9
95.0
Efficiency 30%
%
92.2
96.0
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
100
100
(tmax)
Heating water content
litres
19
24
Heating expansion tank capacity
litres
8
10
Heating expansion tank prefilling pressure
bar
1
1
Protection rating
IP
X0D
X0D
Power supply voltage
V/Hz
230/50
230/50
Electrical power input
W
195
195
Empty weight
kg
157
196
Combustion chamber length
mm
350
450
Combustion chamber diameter
mm
300
300
Pressure loss on fume side
mbar
0.11
0.35
