Technical data

Technical data
64 Installation and maintenance instructions ecoTEC pro 0020129672_03
17
17 Technical data
ecoTEC pro Unit pro 24 (VUW GB 246/5-3) pro 28 (VUW GB 286/5-3)
Nominal heat output range P at 50/30 °C kW 5.7 - 19.9 6.9 - 25.7
Nominal heat output range P at 80/60 °C kW 5.2 - 18.9 6.2 - 24.4
Maximum heat output for hot water generation kW 23.4 28.6
Maximum heat input for hot water generation kW 23.7 28.9
Maximum heat input at the heating side kW 19.1 24.7
Minimum heat input G20 kW 5.5 6.6
Minimum heat input G31 kW — 8.7
Minimum heat output G31 kW — 8.2
Heating setting range kW 5 - 19 6 - 24
Heating
Max. flow temperature °C 85
Max. flow temperature setting range(factory setting: 75 °C) °C 30-80
Min. pressure for full operation MPa/bar 0.08/0.8
Permissible total over-pressure MPa/bar 0.3/3.0
Expansion vessel capacity l 8
Circulation water quantity (with reference to DT = 20 K)
l/h 796 1032
Condensate rate approx. (pH value 3.5 – 4.0)
in heatin
g
mode 50 °C su
pp
l
y
/30 °C return
l/h 1.9 2.5
Remaining feed head of pump (at nominal circulation water
volume)
MPa/bar 0.025/0.25
DHW mode
Lowest water volume l/min 1.5
Water volume (at DT = 42 K)
l/min 7.8 9.6
Water volume (at DT = 35 K)
l/min 9.4 11.5
Water volume (at DT = 30 K)
l/min 11.0 13.4
Permitted overpressure MPa/bar 1.0/10.0
Required connection pressure MPa/bar 0.035/0.35
Hot water output temperature range °C 35-65
General
Boiler-side
g
as connection mm 15
Flow/return heating connections, boiler side mm 22
Connecting the hot and cold water, boiler side Inches G 3/4
Connector expansion relief valve (minimum) mm 15
Condensate discharge pipework (minimum) mm 19
Flue gas spigot mm 60/100 (concentric), optional 80/125 (concentric)
Gas connection pressure (gas inlet working pressure)
natural
g
as, G20
kPa/mbar 0.20/20
Gas connection pressure (gas inlet working pressure)
p
ro
p
ane, G31
kPa/mbar 0.37/37
Gas flow rate at 15 °C and 1013 mbar
(based on hot water generation if applicable) G20
G31
m
3
/h
k
g
/h
2.5
1.84
3.1
2.25
Flue gas mass flow min./max. g/s 2.5/10.6 3.0 (H gas); 3.9 (P gas)/13.0
Flue gas temperature min./max. °C 40/70 40/75
Certificated flue gas connections C13, C33, C43 , C53, C83, C83, B53P
NOx class 5
NOx mg/kWh 27.3 33.4
SEDBUK (2005) A
SEDBUK (2009) (G20/G31) 89.1/- 89.3/90.3
Boiler dimensions (H x W x D) mm 720 x 440 x 335
Mounting weight approx. kg 35 36
Electrical connection V/Hz 230/50
Built-in fuse 2 A, slow-blow
Electrical power consumption min./max. W 90/105
Standby electrical consumption W < 2 < 2
Level of protection IP X4 D
Certification number CE-0085CM0320
17.1 Technical data