Technical Data - Navien NCB700-42C Installation & Operation Manual

2.3 Technical Data

The following table lists the general specifications for the boiler.
DHW heat input range
Heat output range @ 80/60°C
DHW output range
Condensing heat output range @ 50/30°C
Full load efficiency at Max./Min. output @ 80/60°C
Full load efficiency at Max./Min. output @ 50/30°C (Condensing)
Partial load (30%) efficiency with 47°C return temp.
Partial load (30%) efficiency with 30°C return temp.
Heat loss through the case with burner switched on
Heat loss through the chimney with burner switched on
Seasonal efficiency rate (SEDBUK 2009)
Heat output adjustment
Type of heating installation
Max. heating operation pressure
Max. heating temperature
Adjustable heating temperature range
Expansion vessel volume
Expansion vessel pre-charged pressure
Min. DHW working pressure
Min. DHW working flow
Max. DHW working pressure
Adjustable DHW temperature range
DHW flow rate @ 25°C temp. rise.
DHW flow rate @ 30°C temp. rise.
DHW flow rate for kitchen @ 45°C temp. rise.
Electrical power supply
Max. power consumption
Appliance protection rating
Boiler mounting system type
8 About the Boiler
Specifications
Heat input range
NOx Classification
Category
Type
Nominal current
Unit NCB700-42C
kW 34.8/3.5
kW 40.8/3.5
kW 34.0/3.4
kW 42.0/3.5
kW 37.2/3.7
% 97.0/97.0
% 107.0/107.8
% 103.0
% 108.5
% 0.1
% 1.9
- 89.1
-
-
- Heating and instantaneous hot water production
- Adjustable over entire Max./Min. output range
-
bar
°C
°C
l
bar
bar 1.2
l/min
bar
°C
l/min 24.1
l/min 20.1
l/min 13.4
-
A
W
-
-
NCB700-54C
34.8/3.5
52.4/3.5
34.0/3.4
42.0/3.5
37.2/3.7
97.0/97.0
107.0/107.8
103.0
108.5
0.1
1.9
89.1
Class 6
II2H3P
Close circuit
2.5
90
40-90
10.0
1.0
1.2
2.0
10
30–65
31.0
25.8
17.2
230 V/50 Hz
0.62
140
IP X5D
Wall-mounted