Product Information - Navien NCB-24LSWE Service Manual

2. Product Information

2.1 Product Information
The NCB series gas boiler is a fully modulating gas appliance which has a built-in circulation pump and air vent. It provides central
heating and domestic hot water. Depending on the heat capacity, three models are available with different ratings: 24 kW, 28 kW,
34kW, and 40 kW.
Model
NCB-24LSWE
NCB-28LSWE
NCB-34LSWE
NCB-40LSWE
 By default, the boiler assigns system priority to DHW supply.
 The NCB Series boiler has a built-in circulation pump, 3-way valve assembly, flow sensor, DHW plate heat exchanger and, a
safety valve (or relief valve). A separate heating expansion vessel is required.
 Internal freeze protection and an electronic control unit are incorporated inside the boiler. The boiler is compatible with all
brands of standalone room thermostats and various sets of relay contacts can be used with the boiler.
12 NCB Service Manual
Maximum Space Heating Input
20.0 kW
24.0 kW
29.0 kW
34.0 kW
Maximum DHW INPUT
24.0 kW
28.0 kW
34.0 kW
40.0 kW
Version 1.0