Appendix
0020258610_00 ecoVIT exclusiv Installation and maintenance instructions
39
VKK 226/4-H
VKK 226/4-L
VKK 286/4-H
VKK 286/4-L
VKK 366/4-H
VKK 366/4-L
Nominal efficiency (sta-
tionary) at 80/60 °C
97.0 %
97.0 %
97.0 %
97.0 %
97.0 %
97.0 %
Nominal efficiency (sta-
tionary) at 60/40 °C
102.0 %
102.0 %
102.0 %
102.0 %
102.0 %
102.0 %
Nominal efficiency (sta-
tionary) at 50/30 °C
104.0 %
104.0 %
104.0 %
104.0 %
104.0 %
104.0 %
Nominal efficiency (sta-
tionary) at 40/30 °C
107.0 %
107.0 %
107.0 %
107.0 %
107.0 %
107.0 %
30% efficiency
108 %
108 %
108 %
108 %
108 %
108 %
Standard efficiency
(when set to nominal
heat output, DIN 4702,
T8) at 75/60 °C
107.0 %
107.0 %
107.0 %
107.0 %
107.0 %
107.0 %
Standard efficiency
(when set to nominal
heat output, DIN 4702,
T8) at 40/30 °C
109.0 %
109.0 %
109.0 %
109.0 %
109.0 %
109.0 %
NOx class
5
5
5
5
5
5
NOx emissions
42 mg/kW
⋅
h
42 mg/kW
⋅
h
34 mg/kW
⋅
h
34 mg/kW
⋅
h
51 mg/kW
⋅
h
51 mg/kW
⋅
h
CO emissions
11 mg/kW
⋅
h
11 mg/kW
⋅
h
8 mg/kW
⋅
h
8 mg/kW
⋅
h
5 mg/kW
⋅
h
5 mg/kW
⋅
h
Boiler dimensions, width
570 mm
570 mm
570 mm
570 mm
570 mm
570 mm
Boiler dimensions, height
1,257 mm
1,257 mm
1,257 mm
1,257 mm
1,257 mm
1,257 mm
Boiler dimensions, depth
691 mm
691 mm
691 mm
691 mm
691 mm
691 mm
Approx. net weight
100 kg
100 kg
100 kg
100 kg
110 kg
110 kg
Ready for operation
weight approx.
210 kg
210 kg
235 kg
235 kg
255 kg
255 kg
VKK 476/4-H
VKK 476/4-L
VKK 656/4-H
VKK 656/4-L
Designated country (des-
ignation in accordance
with ISO 3166)
DE (Ger-
many),
AT (Austria)
DE (Ger-
many),
AT (Austria)
DE (Ger-
many),
AT (Austria)
DE (Ger-
many),
AT (Austria)
Approved unit categories
II
2ELL3P
(DE),
II
2H3P
(AT)
II
2ELL3P
(DE),
II
2H3P
(AT)
II
2ELL3P
(DE),
II
2H3P
(AT)
II
2ELL3P
(DE),
II
2H3P
(AT)
Gas connection, boiler
side
R 3/4 inch
R 3/4 inch
R 3/4 inch
R 3/4 inch
Flow/return heating con-
nections, boiler side
Rp1
Rp1
Rp1
Rp1
Air/flue connection
80/125 mm
80/125 mm
80/125 mm
80/125 mm
Condensate discharge
pipe (min.)
21 mm
21 mm
21 mm
21 mm
G20 natural gas flow
pressure
2 kPa
(20 mbar)
2 kPa
(20 mbar)
G25 natural gas flow
pressure
2.5 kPa
(25.0 mbar)
2.5 kPa
(25.0 mbar)
G31 liquid gas flow pres-
sure
5 kPa
(50 mbar)
5 kPa
(50 mbar)
5 kPa
(50 mbar)
5 kPa
(50 mbar)
Gas flow rate at 15 °C
and 1013 mbar (G20)
4.8 m
³
/h
6.6 m
³
/h
Gas flow rate at 15 °C
and 1013 mbar (G25)
5.5 m
³
/h
7.6 m
³
/h
Gas flow rate at 15 °C
and 1013 mbar (G31)
3.5 m
³
/h
3.5 m
³
/h
4.8 m
³
/h
4.8 m
³
/h
Min. flue gas mass flow
rate (G20)
6.9 g/s
9.2 g/s
Max. flue gas mass flow
rate (G20)
20.3 g/s
27.8 g/s
Min. flue gas temperature
(at tV/tR = 80/60 °C)
62
℃
62
℃
62
℃
62
℃
Max. flue gas temperat-
ure (at tV/tR = 80/60 °C)
75
℃
75
℃
85
℃
85
℃
