Technical Data - Navien NCB500-1.5S/37K 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. output @ 80/60°C
Full load efficiency at Max./Min. output @ 50/30°C (Condensing)
Partial load (30%) efficiency with 30°C return temp.
Heat loss through the case 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
Flue exhaust/Air intake system types
Flue exhaust/Air intake system diameters
8 About the Boiler
Specifications
Heat input range
NOx Classification
Category
Type
Nominal current
NCB500-1.5S/37K
Unit
kW 26.8/4.6
kW 37.0/4.6
kW 26.0/4.5
kW 37.0/4.6
kW 28.2/4.8
% 88.4
% 106.5
% 108.1
%
-
-
-
- Heating and instantaneous hot water production
- Adjustable over entire Max./Min. output range
-
bar
°C
°C
L
bar
bar 0.7
l/min
bar
°C
l/min 21
l/min 18
l/min 12
-
A 0.6
W 70
-
-
- B23-B33-B53-C13-C33-C43-C53-C63-C83
mm Coaxial Ø60/100 and Ø80/125–Dual duct Ø80/80
NCB500-2S/41K
26.8/4.6
41.0/4.6
26.0/4.5
37.0/4.6
28.2/4.8
88.4
106.5
108.1
0.1
Class 6
II2H3P
Close circuit
2.5
90
40-90
6
1.0
1.1
2
10
30-65
24
20
13
230V/50Hz
0.6
75
IPX5D
Wall-mounted