Technical Data; General Specifications - Navien NCB-180 Service Manual

3. Technical Data

3.1 General Specifications

The following table lists the specifications for the boiler. Additional specifications about water, gas, electric, and air supplies (venting)
appear in the Installation section.
Space Heating Specifications
Heating Input, MBH
Model
1
Number
Min
NCB-180 14
NCB-210 18
NCB-240 18
1. Ratings are the same for natural gas models converted to propane use.
2. Heating capacity values are based on U.S. Department of Energy (DOE) test procedures.
3. The net AHRI water ratings shown are based on a piping and pickup allowance of 1.15. Consult Navien before selecting a boiler for installations
having unusual piping and pickup requirements, such as intermittent system operation, extensive piping system, etc.
Domestic Hot Water Specifications
Item
Min
Input Ratings
Max
Water Pressure
Minimum Flow Rate
Flow Rate 77°F (43°C) Temp. Rise
DHW Supply Connection Size
Cold Water Input Connection Size
16 NCB Service Manual
Navien Combination Boiler
Space Heating Ratings
Heating Capacity
Max
80 74
100 92
120 109
NCB-180
14,000 BTU/H
150,000 BTU/H
15-150 psi
0.5 GPM (1.9 L/m)
3.4 GPM
3/4 in NPT
3/4 in NPT
Net AHRI Rating Water
2 , MBH
MBH
64
80
95
NCB-210
18,000 BTU/H
180,000 BTU/H
4.0 GPM
3 ,
2
AFUE
, %
93.5
93.6
93.3
NCB-240
18,000 BTU/H
199,900 BTU/H
4.5 GPM
Version 1.0