C 640
560
700
860
1000
1140
1300
Full load central heating ef
ficiency
P
n
(
H
s
) 80/60 °C
%
88.2
88.3
88.4
88.5
88.6
88.7
Full load central heating ef
ficiency
P
n
(
H
s
) 70/50 °C
%
88.7
88.7
88.7
88.7
88.8
88.8
Full load central heating ef
ficiency
H
s
50/30 °C
%
94.3
94.7
95.0
95.4
95.8
96.1
Min load central heating ef
ficiency
H
s
Return tem
perature 60 °C
%
85.2
85.8
86.2
86.7
87.1
87.6
Part load central heating ef
ficiency
P
n
(
H
s
) Return
temperature
30 °C
%
98.3
98.1
97.9
97.7
97.5
97.3
(1)
Factory setting
Tab.142 Gas and flue gas data
C 640
560
700
860
1000
1140
1300
Gas inlet pressure
G20
mbar
min
max
17
25
17
25
17
25
17
25
17
25
17
25
Gas inlet pressure
G25
mbar
min
max
20
30
20
30
20
30
20
30
20
30
20
30
Gas consumption
G20
m
3
/h
min
max
8.5
56.3
9.6
70.5
13.5
85.1
13.4
99.3
16.2
115.8
18.0
129.1
Gas consumption
G25
m
3
/h
min
max
9.9
65.5
11.2
82.0
15.8
99.0
15.6
115.4
18.7
134.7
20.9
150.2
NOx annual emissions
G20 O
2
= 0%
(EN15502)
ppm
29
29
30
30
30
31
NOx annual emissions
G20
H
i
(EN15502)
mg/kWh
47
48
49
50
51
52
NOx annual emissions
G20
H
s
(EN15502)
mg/kWh
43
43
44
45
46
47
NOx weighted average
emissions
G20
H
s
mg/kWh
45
-
-
-
-
48
CO annual emissions
G20
H
s
mg/kWh
11
-
-
-
-
13
Flue gas amount
kg/h
min
max
135
896
153
1121
216
1354
214
1579
258
1842
286
2054
Flue gas temperature
°C
min
max
30
60
30
61
30
64
30
63
30
66
30
65
Maximum counter pressure
for flue gas outlet
Pa
130
120
130
150
150
150
Flue efficiency
(
H
i
) 80/60 °C Am
bient temperature
20 °C
%
97.8
97.8
97.8
97.7
97.7
97.7
Flue losses
(
H
i
) 80/60 °C Am
bient temperature
20 °C
%
2.2
2.2
2.2
2.3
2.3
2.3
Tab.143 Central heating circuit data
C 640
560
700
860
1000
1140
1300
Water content
l
98
120
142
164
186
208
Water operating pressure
bar
min
0.8
0.8
0.8
0.8
0.8
0.8
Water operating pressure
PMS
bar
max
7.0
7.0
7.0
7.0
7.0
7.0
Water temperature
°C
max
110
110
110
110
110
110
Operating temperature
°C
max
90
90
90
90
90
90
Water flow at full load cen
tral heating
80/60 °C
m
3
/h
max
22.2
27.8
33.6
39.2
45.1
51.0
13 Technical specifications
182
C 340 / C 640
7762666 - v.02 - 29092020
