Product Information - Navien NCB500-2S/37K Service Manual

2. Product Information

2.1 Product Information
The NCB500 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: 37 kW, and 41 kW.
Model
NCB500-2S/37K
NCB500-2S+/41K
By default, the boiler assigns system priority to DHW supply.
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The NCB500 Series boiler has a built-in circulation pump, 3-way valve assembly, flow sensor, DHW plate heat exchanger and, a safety
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valve (or relief valve). A separate additional heating expansion vessel may be required depending on size of the whole system.
Internal freeze protection and an electronic control unit are incorporated inside the boiler. The boiler is compatible with all brands of
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standalone room thermostats and various sets of relay contacts can be used with the boiler.
Maximum Space Heating Input
26.8 kW
26.8 kW
Maximum DHW INPUT
37.0 kW
41.0 kW
Product Information 11