4.4 Technical data M270V.2025 SM
(nom.Q.) Nominal heat input in
heating mode (Hi)
(nom.Q.) Nominal heat input in
d.h.w. mode (Hi)
(nom.Q.) Minimum heat input (Hi)
* Max. heat input in heating mode
60°/80°C
* Max. heat input in d.h.w. mode
60°/80°C
* Min. heat input 60°/80°C
** Max. heat input in heating mode
30°/50°C
** Max. heat input in d.h.w. mode
30°/50°C
** Min. heat input 30°/50°C
Data in heating mode
NOx class
Weighted NOx ***
Weighted CO EN483 (0% O2)
CO at nom. Q. (0% O2) ***
CO at nom. Q. (0% O2) ***
CO2 at nom. Q. with G20
CO2 at min. Q. with G20
CO2 at nom. Q. with G31
CO2 at min. Q. with G31
** Condensate quantity at nom.Q.
30°/50°C
** Condensate quantity at min.Q.
30°/50°C
Condensate pH
- 22 -
TECHNICAL SPECIFICATIONS
kW
21,0
kcal/h
18057
kW
26,0
kcal/h
22356
kW
5,1
kcal/h
4385
kW
20,5
kcal/h
17627
kW
25,4
kcal/h
21840
kW
4,8
kcal/h
4127
kW
22,4
kcal/h
19261
kW
27,8
kcal/h
23904
kW
5,3
kcal/h
4557
6
mg/kWh
43
ppm
24
ppm
n.a.
ppm
225,0
ppm
7,0
%
9,0 - 9,6
%
8,2 - 8,8
%
10,1 - 10,7
%
9,4 - 10,0
l/h
4,2
l/h
0,8
l/h
4,0
Data in d.h.w. mode
CO2 at nom. Q. with G20
CO2 at min. Q. with G20
CO2 at nom. Q. with G31
CO2 at min. Q. with G31
* With return water temperature that does not permit
condensation
** With return water temperature that does permits
condensation
*** With coax. flue gas discharge 60/100 0.9 m and
METHANE gas G20
Measured efficiency in heating mode
* Nominal efficiency 60°/80°C
* Min. efficiency 60°/80 C
** Nominal efficiency 30°/50°C
** Min. efficiency 30°/50°C
* Efficiency At 30 % of load
** Efficiency At 30 % of load
Heat loss at the chimney with
burner operating
Heat loss at the chimney with
burner off ΔT 50°C
Heat loss towards the environment
through the casing with the burner
operating
Energy efficiency
Gas supply pressures
Gas
Nom.
Methane G20
Min.
Max.
Nom.
Propane G31
Min.
Max.
%
9,1 - 9,7
%
8,2 - 8,8
%
10,3 - 10,9
%
9,4 - 10,0
%
97,7
%
93,5
%
106,8
%
103,9
%
n.a.
%
107,5
Pf (%)
1,8
Pfbs
0,2
(%)
Pd (%)
1,6
* * * *
Pa
mbar
2000
20
1700
17
2500
25
3700
37
2500
25
4500
45