8 Installation and maintenance instructions ecoTEC plus 0020244998_04
3 Technical data
Technical data – General
VUI 286/5-
5 (H-GB)
ecoTEC plus
938
Designated country (des-
ignation in accordance
with ISO 3166)
GB (Great
Britain), IE
(Ireland)
Approved unit categories
II
2H3P
Gas connection, boiler
side
15 mm
Flow/return heating con-
nections, boiler side
22 mm
Domestic hot and cold
water connection, boiler
side
G 3/4″
Expansion relief valve
connection pipe (min.)
15 mm
Air/flue gas connection
60/100 mm
Condensate drain pipe-
work (min.)
19 mm
G20 natural gas flow
pressure
2.0 kPa
(20.0 mbar)
G31 propane gas flow
pressure
3.7 kPa
(37.0 mbar)
Gas flow rate at 15 °C
and 1013 mbar (based
on domestic hot water
generation, if applicable),
G20
4.2 m³/h
Min. flue gas mass flow
rate (G20)
3.05 g/s
Max. flue gas mass rate
17.9 g/s
Min. flue gas temperature
40 ℃
Max. flue gas temperat-
ure
70 ℃
Approved gas boiler
types
B33, B33P,
B53,
B53P,C13,
C33, C43,
C53, C83,
C93
30% efficiency
109.4 %
NOx class
6
Test symbol/registration
no.
CE‑
0085CM0321
SAP 2009/2012 annual
efficiency (%)
89.4 %
Boiler dimension, width
440 mm
Boiler dimension, height
720 mm
Boiler dimension, depth
624 mm
Mounting weight
– 43 kg
VUW
– 17 kg
VIHCL
Operating weight (with
water)
– 51 kg
VUW
– 32 kg
VIHCL
Shift-load cylinder capa-
city
15 l
Technical data – G20 power/loading G20
VUI 286/5-
5 (H-GB)
ecoTEC plus
938
Nominal heat output
range P at 50/30 °C
7.1 to 30.9 kW
Nominal heat output
range P at 80/60 °C
6.5 to 28.6 kW
Maximum heat output
for domestic hot water
generation
38.7 kW
Maximum heat input for
domestic hot water gen-
eration
39.2 kW
Maximum heat input,
heating side
28.9 kW
Minimum heat input
6.8 kW
Heating adjustment range
6 to 29 kW
Nominal heat input ef-
ficiency (stationary) at
40/30 °C
107.0 %
Nominal heat input ef-
ficiency (stationary) at
50/30 °C
107.0 %
Nominal heat input ef-
ficiency (stationary) at
60/40 °C
101.0 %
Nominal heat input ef-
ficiency (stationary) at
80/60 °C
98.0 %
Technical data – Power/loading G31
VUI 286/5-
5 (H-GB)
ecoTEC plus
938
Nominal heat output
range P at 50/30 °C
9.4 to 29.8 kW
Nominal heat output
range P at 80/60 °C
8.7 to 28.6 kW
Maximum heat output
for domestic hot water
generation
38.7 kW
Maximum heat input for
domestic hot water gen-
eration
39.2 kW
Maximum heat input,
heating side
28.9 kW
Minimum heat input
9.0 kW
Nominal heat input ef-
ficiency (stationary) at
40/30 °C
104.0 %
Nominal heat input ef-
ficiency (stationary) at
50/30 °C
103.0 %
Nominal heat input ef-
ficiency (stationary) at
60/40 °C
101.0 %
Nominal heat input ef-
ficiency (stationary) at
80/60 °C
98.0 %
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