Technical Data; General Specifications - Navien NCB-700-2S+/42K Service Manual

3. Technical Data

3.1 General Specifications

The table below lists the boiler's general specifications.
Specifications
Heat input range
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)
NOx Classification
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 @ 35°C temp. rise.
DHW flow rate for kitchen @ 45°C temp. rise.
Gas rate
Gas rate
Electrical power supply
Nominal current
Max. power consumption
Category
Type
Q
(G20) max
Q
(G20) min
Unit NCB700-2S+/42K
kW 35.0/3.5
kW 40.6/3.5
kW 34.0/3.4
kW 42.0/3.5
kW 37.1
% 98.5
% 107.1
% -
% 109.7
% -
% -
- 93.61
-
-
- Heating and instantaneous hot water production
- Adjustable over entire Max./Min. output range
-
bar
°C
°C
L
bar
bar 0.5
L/Min
bar
°C
L/Min 24.1
L/Min 17.2
L/Min 13.4
m /h 3.77
3
m /h 0.33
3
-
A 0.6
W 130
NCB700-3S/54K
35.0/3.5
52.0/3.5
34.0/3.4
54.0/3.5
37.1
98.6
106.9
-
109.4
-
-
93.51
Class 6
ll2H3P
Close circuit
2.5
90
40-90
10
1
0.5
2.0
10.0
30-65
31.0
22.1
17.2
4.83
0.33
230V / 50Hz
0.7
150
Technical Data 17