Navien NCB-250/150H User's Information Manual

WARNING
If the information in these instructions is not followed exactly, a fire or explosion may result,
causing property damage, personal injury, or death.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
●
Do n ot try to light any appliance.
●
Do not touch any electrical switch; do not use any phone in your building.
●
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instructions.
●
If you can not reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
H
NSF/ANSI 372
Keep this manual near this boiler for future reference
whenever maintenance or service is required.
* The wetted surface of this product contacted by consumable water
contains less than one quarter of one percent (0.25%) of lead by
weight.
User’s Information Manual
NCB-H Condensing Combi-Boilers
Model
NCB-190/060H
NCB-190/080H
NCB-240/110H
NCB-240/130H
NCB-250/150H

Navien NCB-250/150H Specifications

General

Category	Boiler
Brand	Navien
Model	NCB-250/150H
Fuel Type	Natural Gas / Propane
Min. Input (Heating)	15, 000 BTU/h
Min. Input (DHW)	15, 000 BTU/h
Heating Capacity	150, 000 BTU/h
Efficiency	95% AFUE
Gas Connection Size	3/4" NPT
Type	Combination Boiler
DHW Flow Rate	4.8 GPM
Water Connection Size	3/4" NPT
Vent Size	3 inches
Water Flow Rate (GPM)	9.8 GPM at 45°F rise
Vent Diameter (inches)	3 inches