8
2.3 Technical Data
The following table lists the general specifications for the boiler.
Specifications
Unit
NCB-
20LHWE
NCB-
23LHWE
NCB-
28LHWE
NCB-
33LHWE
Heat input range
kW
20.0/4.2
24.0/4.2
29.0/5.1
34.0/4.0
Heat output range @ 80/60°C
kW
19.5/3.9
23.4/3.9
28.3/4.9
33.2/3.8
Condensing heat output range @ 50/30°C
kW
21.4/4.5
25.6/4.5
31.1/5.4
36.3/4.3
Full load efficiency at Max./Min. output @ 80/60°C
%
97.5/96.4
97.5/96.4
97.6/96.4
97.6/95.8
Full load efficiency at Max./Min. output @ 50/30°C
(Condensing)
%
106.9/107.8
106.6/107.8
107.3/106.9
106.9/106.9
Partial load (30%) efficiency with 47°C return temp.
%
101.9
103.1
102.0
103.1
Partial load (30%) efficiency with 30°C return temp.
%
108.6
108.9
108.5
108.8
Heat loss through the case with burner switched on
%
0.1
0.1
0.1
0.1
Heat loss through the chimney with burner switched on
%
1.6
1.8
1.5
1.9
Seasonal efficiency rate (SEDBUK 2009)
-
89.0
89.1
89.0
89.1
NOx Classification
-
Class 5
Category
-
II2H3P
Type
-
Heating and instantaneous hot water production
Heat output adjustment
-
Adjustable over entire Max./Min. output range
Type of heating installation
-
Close circuit
Max. heating operation pressure
bar
2.5
Max. heating temperature
°C
90
Adjustable heating temperature range
°C
40-90
Expansion vessel volume
l
6.0
Expansion vessel pre-charged pressure
bar
1.0
Electrical power supply
-
230 V/50 Hz
Nominal current
A
0.6
0.6
0.62
0.62
Max. power consumption
W
130
Appliance protection rating
-
IP X5D
Boiler mounting system type
-
Wall-mounted
Flue exhaust/Air intake system types
-
B23-B33-B53-C13-C33-C43-C53-C63-C83
Flue exhaust/Air intake system diameters
mm
Coaxial Ø60/100 and Ø80/125–Dual duct Ø80/80
Max. gas pipe pressure drop
Pa
167
167
294
294
Max. horizontal coaxial length Ø60/100
m
20
Max. vertical coaxial length Ø60/100
m
21
Equivalent elbow length @ 90° Ø60/100
m
1.3
Equivalent elbow length @ 45° Ø60/100
m
1.0
Max. horizontal coaxial length Ø80/125
m
68
Unit
NCB-
20LHWE
NCB-
23LHWE
NCB-
28LHWE
NCB-
33LHWE
Max. vertical coaxial length Ø80/125
m
70
Equivalent elbow length @ 90° Ø80/125
m
2.2
Equivalent elbow length @ 45° Ø80/125
m
1.0
Equivalent length of adapter Ø60/100 => Ø80/125
m
0.5
Max. dual duct length Ø80/80
m
110
Equivalent elbow length @ 90° Ø80
m
2.2
Equivalent elbow length @ 45° Ø80
m
1.4
Hydraulic connection
diameter
Central Heating
mm
22
DHW
mm
15
Gas supply
mm
22
Dimensions (Width x Depth x Height)
mm
440 x 358 x 695
440 x 408 x 695
Total boiler weight (lift weight)
Kg
36
36
40
40
About the Boiler
Summary of Contents for NCB-20LHWE
Page 41: ...41 Wiring Examples for Different Applications...
Page 71: ...71 13 4 Ladder Diagram 3 15A Appendices...
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