Technical data
82 Installation and maintenance instructions ecoTEC plus 0020116700_01
17
ecoTEC plus Unit
824 (VUW GB
246/5-5)
831 (VUW GB
316/5-5)
837 (VUW GB
376/5-5)
Nominal heat output range P at 50/30 °C kW 4.1 - 20.4 5.6 - 25.7 6.9 - 30.1
Nominal heat output range P at 80/60 °C kW 3.8 - 19.0 5.2 - 24.0 6.4 - 28.0
Maximum heat output for hot water generation kW 24.0 30.3 38.0
Maximum heat input for hot water generation kW 24.7 31.2 39.2
Maximum heat input at the heating side kW 19.6 24.7 28.9
Minimum heat input G20 kW 4.0 5.5 6.8
Minimum heat input G31 kW 6.4 6.4 9.0
Minimum heat output with G31 kW 6.0 6.0 8.5
Heating output setting range kW 4 - 19 5 - 24 6 - 28
Heating
Max. flow temperature °C 85
Max. flow temperature setting range
(factory setting: 75 °C)
°C 30 - 80
Permissible total over-pressure MPa/bar 0.3/3
Expansion vessel capacity l 10
Circulation water quantity (with reference to DT = 20 K)
l/h 817 1032 1204
Condensate rate approx. (pH value 3.5 – 4.0)
in heating mode 50 °C supply/30 °C return
l/h 2.0 2.5 2.9
Remaining feed head of pump (at nominal circulation
water volume)
MPa/bar 0.025/0.25 0.020/0.20
DHW mode (VUW boiler only)
Lowest water volume l/min 1.5
Water volume (at DT = 42 K)
l/min 8.2 10.3 13.0
Water volume (at DT = 35 K)
l/min 9,8 12,4 15,6
Water volume (at DT = 30 K)
l/min 11.5 14.5 18.2
Permitted overpressure MPa/bar 1.0/10
Required connection pressure MPa/bar 0.035/0.35
Hot water output temperature range °C 35 - 65
General
Gas connection, boiler side mm 15 15 22
Flow/return heating connections, boiler side mm 22
Hot and cold water connection, 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 gas, G20
kPa/mbar 0.20/20
Gas connection pressure (gas inlet working pressure)
propane, G31
kPa/mbar 0.37/37
Gas flow rate at 15 °C and 1013mbar
(based on hot water generation if applicable) G20
G31
m
3
/h
kg/h
2.6
1.924
3.3
2.42
4.1
3.05
Flue gas mass flow min./max. g/s 1.8/11.1 2.4/14.0 3.0/17.6
Flue gas temperature min./max. °C 40/70
Certificated flue gas connections C13, C33, C43, C53, C83, C93, B53P
NOx class 5
Boiler dimensions (H x W x D) mm 720 x 440 x 335 720 x 440 x 369
Mounting weight approx. kg 36 38 41
Electrical connection V/Hz 230/50
Built-in fuse 2 A, slow-blow
Electrical power consumption min./max. W 80/105 70/105 100/130
Electrical power consumption at 30% partial load W 45 50 50
Standby electrical consumption W < 2 < 2 < 3,3
Level of protection IP X4 D
Certification number CE-0085CM0320
17.2 Technical data for ecoTEC plus VUW boiler
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