1.3 Specification
Gas boiler, type B
11
/B
11 BS
, category II
2ELL3 P
Rated output kW 11 15 18 22 29 35 42 48 60
Rated heat input kW 12.1 16.6 19.9 24.3 32.0 38.6 46.4 53.0 66.2
Heating surface
m
2
1.04 1.04 1.51 1.51 1.99 2.46 2.93 3.40 4.35
U-value of thermal insulation
W/m
2
K
0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45
Product ID CE 0085 AS 0297
Gas supply pressure (nominal pres-
sure)
Natural gas mbar 20 20 20 20 20 20 20 20 20
LPG mbar 50 50 50 50 50 50 50 50 50
Max. permissible gas supply pres-
sure
Natural gas mbar 25 25 25 25 25 25 25 25 25
LPG mbar 57.5 57.5 57.5 57.5 57.5 57.5 57.5 57.5 57.5
Total dimensions (height is given
incl. 13 mm adjustable feet)
Length mm 580 580 580 580 580 580 580 580 580
Total length c mm 760 760 760 760 760 780 780 780 780
Width a mm 446 446 526 526 596 706 796 886 1076
Total width b mm 500 500 580 580 650 760 850 940 1130
Height without control unit mm 788 788 788 788 788 788 788 788 788
Height with control unit mm 890 890 890 890 890 890 890 890 890
Height with flue pipe bend d mm 950 980 1005 1005 1025 1025 1025 1095 1095
Plinth height mm 250 250 250 250 250 250 250 250 250
Total weight
Boiler with thermal insulation, burner
and boiler control unit
kg 101 101 124 124 148 170 194 218 264
Content boiler water litres 7.6 7.6 9.7 9.7 11.7 13.8 15.9 17.9 21.9
Permiss. operating pressure bar 3 3 3 3 3 3 3 3 3
Boiler connections
Boiler flow and return G 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½
Safety flow G 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½ 1½
Drain R ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
Gas connection R ½ ½ ½ ½ ½ ½ ½ ½ ½
Connection values
in relation to the max. load
Natural gas E
m
3
/h
1.28 1.76 2.11 2.57 3.39 4.09 4.91 5.61 7.01
Natural gas LL
m
3
/h
1.49 2.04 2.45 2.99 3.94 4.75 5.71 6.52 8.15
LPG kg/h 0.95 1.30 1.56 1.90 2.50 3.02 3.62 4.14 5.17
Flue gas parameters
(calculation values for sizing the flue
gas system to EN 13384)
Flue gas temperatures
(gross values, measured at 20 °C
combustion air temperature)
50 °C boiler water temperature
(actual values are significant for the
sizing of the flue system)
°C 80 95 90 97 102 101 114 114 109
80 °C boiler water temperature
(actual values for determining the
application range of flue gas lines with
max. permissible operating tempera-
tures)
°C 90 104 102 106 118 113 130 130 122
Mass flow rate
Natural gas kg/h 32 48 58 73 92 107 105 127 160
at CO
2
content % 5.5 5.0 5.0 4.8 5.0 5.2 6.5 6.1 6.0
LPG kg/h 30 48 54 67 84 95 101 126 153
at CO
2
content % 6.6 5.6 6.0 5.9 6.2 6.7 7.6 6.9 7.1
Required draught Pa 3 3 3 3 3 3 3 3 3
mbar 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03
Flue gas connection Ø mm 90 110 130 130 150 150 150 180 180
Seasonal efficiency [to DIN]
T
V
/T
R
= 75/60 °C
% 84 (H
s
)/93 (H
i
)
Standby heat loss at 60 °C boiler
water temperature
% 1.9 1.5 1.5 1.2 1.1 1.0 0.9 0.8 0.8
Product information
(cont.)
6
VIESMANN
VITOGAS
1
5822 428 GB
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