43
ENGLISH
DESCRIPTION
UM
FAMILY Cx
25 KIS
30 KIS
35 KIS
G20
G31
G20
G31
G20
G31
Gas pressure
Nominal methane gas pressure (G20) mbar
mbar
20
-
20
-
20
-
Nominal liquid gas LPG pressure (G31)
mbar
-
37
-
37
-
37
Hydraulic connections
CH input - output
Ø
3/4”
3/4”
3/4”
DHW input-output
Ø
1/2”
1/2”
1/2”
Gas input
Ø
3/4”
3/4”
3/4”
Boiler dimensions
Height at casing
mm
740
740
740
Overall height of the SRB device
mm
822
822
822
Width
mm
470
470
470
Depth
mm
275
350
350
Boiler weight
kg
35
40
40
Heating output
Air capacity
Nm
3
/h
24,298
24,819
30,372
31,094
36,447
37,228
Flue gas capacity
Nm
3
/h
26,304
26,370
32,880
32,963
39,456
39,555
Mass fl ue gas fl ow rate (max-min)
g/s
9,086-
1,635
9,297-
2,324
11,357-
2,226
11,621-
3,254
13,629-
2,226
13,946-3,254
Domestic hot water capacity
Air capacity
Nm
3
/h
30,372
31,024
36,447
37,228
42,035
42,937
Flue gas capacity
Nm
3
/h
32,880
32,963
39,456
39,555
45,506
45,620
Mass fl ue gas fl ow rate (max-min)
g/s
11,357-
1,635
11,621-
2,324
13,629-
2,226
13,946-
3,254
15,718-
2,226
16,084-3,254
Fan performance
Residual discharge head of concentric pipes 0.85 m
Pa
60
60
60
Residual discharge head of separate pipes 0.5 m
Pa
174
150
190
Residual discharge head of boiler without pipes
Pa
180
170
195
Concentric fl ue gas outlet pipes
Diameter
mm
60-100
60-100
60-100
Maximum length
m
10
6
6
Losses for a 45°/90° bend
m
1.3/1.6
1.3/1.6
1.3/1.6
Hole in wall (diameter)
mm
105
105
105
Concentric fl ue gas outlet pipes
Diameter
mm
80-125
80-125
80-125
Maximum length
m
25
15
15
Losses for a 45°/90° bend
m
1/1.5
1/1.5
1/1.5
Hole in wall (diameter)
mm
130
130
130
Twin fl ue gas outlet pipes
Diameter
mm
80
80
80
Maximum length
m
60+60
33+33
35+35
Losses for a 45°/90° bend
m
1/1.5
1/1.5
1/1.5
Forced open installation B23P-B53P
Diameter
mm
80
80
80
Maximum discharge tube length
m
110
65
65
NOx
class 6
class 6
class 6
Emission values at maximum and minimum output (**)
G20
G31
G20
G31
G20
G31
Maximum
CO s.a. less than
p.p.m.
130
130
120
140
140
150
CO2 (***)
%
9.0
10.0
9.0
10.0
9.0
10.0
NOx s.a. lower than
p.p.m.
30
30
50
50
40
40
T fl ue gases
°C
69
68
67
65
65
63
Minimum
CO s.a. less than
p.p.m.
10
10
10
10
10
10
CO2 (***)
%
9.0
10.0
9.0
10.0
9.0
10.0
NOx s.a. lower than
p.p.m.
30
30
25
50
25
40
T fl ue gases
°C
63
62
59
59
65
63
(*) average value between various hot water operation conditions
(**) Check performed with concentric pipe Ø 60-100, length 0.85 m. - water temperature 80-60°C.
The data indicated must not be used to certify the system; for certifi cation, use the data indicated in the “System handbook” measured during fi rst ignition.
(***) tolerance CO
2
+0.6% -1%
