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4.5
Technical data ADVANCE 25S
Heat input
Nominal net
central heating
(A)
Nominal gross
central heating
(B)
Minimum net
(A)
Minimum gross
(B)
Useful output
Maximum
Minimum
Maximum condensing
Minimum condensing
- 24 -
TECHNICAL INFORMATION
kW
25,0
BTU/h 85304
kW
27,8
BTU/h 94687
kW
7,5
BTU/h 25591
kW
8,3
BTU/h 28406
kW
24,4
BTU/h 83256
kW
7,0
BTU/h 23885
kW
26,8
BTU/h 91445
kW
7,8
BTU/h 26615
Central heating
Min/Max flow temperature settings*
Maximum pressure
Minimum pressure
Available head (in 1000 l/h)
Seasonal efficiency G20
(c)
Seasonal efficiency G31
(c)
* to the minimum useful output
referred to the net calorific value at 15 °C and
(A)
1013,25 mbar: G20 = 34,02 MJ/m
kg
referred to the gross calorific value at 15 °C and
(B)
1013,25 mbar: G20 = 37,78 MJ/m
kg
The value is used in the UK Government's Standard
(C)
Assessment Procedure (SAP) for energy rating of
dwellings. The test data from which it has been calcu-
lated have been certified by a notified body.
Values subject to tolerance
(D)
Gas supply pressures
Gas
Nom
Natural G20
Min
Max
Nom
Propane G31
Min
Max
Gas rate maximum
Natural G20
Propane G31
Gas rate minimum
Natural G20
Propane G31
°C
25 -80
kPa
250
bar
2,5
kPa
30
bar
0,3
kPa
34,0
bar
0,34
%
88,7
%
90,7
- G31 = 46,34 MJ/
3
- G31 = 50,37 MJ/
3
Pa
mbar
2000
20
1700
17
2500
25
3700
37
2500
25
4500
45
m
/h
2,65
3
kg/h
1,94
m
/h
0,79
3
kg/h
0,58
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