8 Installation and maintenance instructions ecoFIT pure 0020230535_07
VU 256/6-3 OV (H-GB) VU 306/6-3 OV (H-GB) VU 356/6-3 OV (H-GB)
Gas category
I
2H
I
2H
I
2H
Diameter of the gas pipe
1/2 inch 1/2 inch 1/2 inch
Diameter of the heating
connections
3/4 inch 3/4 inch 3/4 inch
Expansion relief valve con-
nection pipe (min.)
15 mm 15 mm 15 mm
Condensate discharge
pipe (min.)
21.5 mm 21.5 mm 21.5 mm
G20 gas supply pressure
2.0 kPa
(20.0 mbar)
2.0 kPa
(20.0 mbar)
2.0 kPa
(20.0 mbar)
Gas flow at P max. – hot
water (G20)
3.2 m³/h 3.8 m³/h 3.8 m³/h
Gas flow at P max. – heat-
ing mode (G20)
2.7 m³/h 3.2 m³/h 3.8 m³/h
Gas flow at P min. (G20)
0.648 m³/h 0.756 m³/h 0.762 m³/h
CE number (PIN)
CE-0063CP3646 CE-0063CP3646 CE-0063CP3646
SAP 2009/2012 annual effi-
ciency (%)
89.7 89.8 –
Flue gas mass rate in heat-
ing mode at P min.
2.81 g/s 3.27 g/s 3.30 g/s
Flue gas mass rate in heat-
ing mode at P max.
11.5 g/s 13.8 g/s 16.1 g/s
Flue gas mass rate in hot
water handling mode at P
max.
13.8 g/s 16.1 g/s 16.1 g/s
Flue gas temperature (80
°C/60 °C) at P max.
77 ℃ 86 ℃ 90 ℃
Flue gas temperature (80
°C/60 °C) at P min.
55 ℃ 56 ℃ 56 ℃
Flue gas temperature (50
°C/30 °C) at P max.
62 ℃ 60 ℃ 62 ℃
Flue gas temperature (50
°C/30 °C) at P min.
35 ℃ 37 ℃ 37 ℃
Flue gas temperature in
hot water handling mode
68 ℃ 75 ℃ 75 ℃
Flue gas temperature when
overheating
95 ℃ 104 ℃ 104 ℃
Released system types
C13, C33, C43, C53 C13, C33, C43, C53 C13, C33, C43, C53
Nominal efficiency at 80/60
°C
98.8 % 99.2 % 97.5 %
Nominal efficiency at
50/30 °C
104.0 % 104.0 % 100.2 %
Nominal efficiency at
40/30 °C
106.0 % 106.0 % 106.0 %
Nominal efficiency in par-
tial load operation (30%) at
40/30 °C
109.7 % 109.8 % 108.5 %
NOx class
5 5 6
Product dimensions, width
375 mm 375 mm 375 mm
Product dimensions, depth
295 mm 280 mm 295 mm
Product dimensions,
height
602 mm 602 mm 602 mm
Net weight
22 kg 22 kg 23 kg
Weight when filled with
water
26 kg 27 kg 28 kg
Technical data – G20 power/load G20
VU 126/6-3 OV (H-GB) VU 156/6-3 OV (H-GB) VU 186/6-3 OV (H-GB)
Maximum heat output
12 kW 15 kW 18 kW
Effective output range (P)
at 40/30 °C
4.8 to 13.0 kW 4.8 to 16.2 kW 5.3 to 19.5 kW