11
GENERAL INFORMATION
Description
Steel Pro Power
U.M.
300-3
P/V
345-3
P/V
405-3
P/V
460-4
P/V
540-4
P/V
TYPE OF APPLIANCE
Appliance type
Condensing boiler heating system
B23, B53; B53P
Fuel
G20-G25-G30-G31
Combustion chamber
vertical
Flue exhaust homologations
B23, B23P, B53P, C13(*), C33(*), C53(*), C63(*)
Device category according to UNI 10642
II2H3P
POWERS AND EFFICIENCY
Nominal rated heat input (PCI)
291
334,8
393
446,4
524
kW
Nominal rated heat input (PCS)
324
372
438
496
584
kW
Maximum rated heat output (80°-60°C)
G20
285,9
329,4
387
439,2
516
kW
Maximum rated heat output (60-40°C)
G20
303,3
348,6
411,9
464,8
549,2
kW
Maximum rated heat output (50-30°C)
G20
315,3
363,6
426,3
484,4
568,4
kW
Minimum rated heat input (PCI)
G20
19,4
22,4
26,3
22,4
26,3
kW
Minimum rated heat input (PCS)
G20
21,6
24,9
29
24,9
29
kW
Minimum thermal output 80/60°C
G20
19,2
22,1
26
22,1
26
kW
Minimum thermal output 50/30°C
G20
21,1
24,5
28,9
24,5
28,9
kW
Useful efficiency at nominal heat output 80-60°C (PCI)
98,25
98,40
98,47
98,40
98,47
%
Useful efficiency at minimum heat output 80-60°C (PCI)
98,8
99,2
99,1
99,2
99,1
%
Useful efficiency at nominal heat output 50/30°C (PCI)
108,2
108,6
108,3
108,6
108,3
%
Useful efficiency at minimum heat output 50/30°C (PCI)
109,2
110
110
110
110
%
Useful efficiency 30% - 50/30°C PCS (PCI)
97,84
(108,93)
98,39
(108,93)
98,17
(109,41)
98,39
(108,93)
98,17
(109,41)
%
Combustion efficiency
99,0
99,3
99,3
99,3
99,3
%
Chimney losses with burner off
0,1
0,1
0,1
0,1
0,1
%
Chimney losses with burner on P. max. 80-60°C
2,6
2,5
2,6
2,5
2,6
%
Chimney losses with burner on at 30% Pn 50-30°C
0,6
0,5
0,6
0,5
0,6
%
Chimney losses with burner on P. min. 80-60°C
0,2
0,1
0,1
0,1
0,1
%
Losses through the casing with average T 70°C and burn-
er on
0,33
0,33
0,33
0,25
0,25
%
Losses through the casing with average T 70°C and burn-
er off
0,33
0,33
0,33
0,25
0,25
%
Flue gas temperature at max power and min power 80-
60°C
78 -62
75 - 61
77 - 61
75 - 61
77 - 61
°C
Flue gas temperature at max power and min power 50-
30°C
49 - 35
45 - 33
48 - 35
45 - 33
48 - 35
°C
Air index
λ
at max power
G20
1,27
1,27
1,27
1,27
1,27
no.
G31
1,29
1,29
1,29
1,29
1,29
no.
Air index
λ
at min power
G20
1,27
1,27
1,27
1,27
1,27
no.
G31
1,29
1,29
1,29
1,29
1,29
no.
Max Flue flow at max-min power
G20
136 - 9
156 - 10
183-12
208-10
245-12
g/s
G31
132 - 9
152-10
179-12
203-10
238-12
g/s
Flue Residual prevalence at min power
32
30
28
30
28
Pa
Flue gas residual head with max power
610
500
353
500
353
Pa
Maximum rated heat input (LCV)
G25
279
321
381
428
508
kW
Minimum rated heat input (LCV)
G25
18,5
21,4
24,5
21,4
24,5
kW
(*)
Configurations possible only with the installation of the dedicated accessories (available separately).