8 About the Boiler
2.3 Technical Data
The following table lists the general specifications for the boiler.
Specifications
Unit
NCB700-42C
NCB700-54C
Heat input range
kW
34.8/3.5
34.8/3.5
DHW heat input range
kW
40.8/3.5
52.4/3.5
Heat output range @ 80/60°C
kW
34.0/3.4
34.0/3.4
DHW output range
kW
42.0/3.5
42.0/3.5
Condensing heat output range @ 50/30°C
kW
37.2/3.7
37.2/3.7
Full load efficiency at Max./Min. output @ 80/60°C
%
97.0/97.0
97.0/97.0
Full load efficiency at Max./Min. output @ 50/30°C (Condensing)
%
107.0/107.8
107.0/107.8
Partial load (30%) efficiency with 47°C return temp.
%
103.0
103.0
Partial load (30%) efficiency with 30°C return temp.
%
108.5
108.5
Heat loss through the case with burner switched on
%
0.1
0.1
Heat loss through the chimney with burner switched on
%
1.9
1.9
Seasonal efficiency rate (SEDBUK 2009)
-
89.1
89.1
NOx Classification
-
Class 6
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
10.0
Expansion vessel pre-charged pressure
bar
1.0
Min. DHW working pressure
bar
1.2
1.2
Min. DHW working flow
l/min
2.0
Max. DHW working pressure
bar
10
Adjustable DHW temperature range
°C
30–65
DHW flow rate @ 25°C temp. rise.
l/min
24.1
31.0
DHW flow rate @ 30°C temp. rise.
l/min
20.1
25.8
DHW flow rate for kitchen @ 45°C temp. rise.
l/min
13.4
17.2
Electrical power supply
-
230 V/50 Hz
Nominal current
A
0.62
Max. power consumption
W
140
Appliance protection rating
-
IP X5D
Boiler mounting system type
-
Wall-mounted
Summary of Contents for NCB700-42C
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