Navien NCB-700-2S+/42K, Руководство по обслуживанию

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12 Product Information
2.1 Product Information
The NCB700 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, two models are available with different ratings: 40.6 kW and 52 kW.
Model Maximum Space Heating Input Maximum DHW INPUT
NCB700-2S+/42K 350 kW 40.6 kW
NCB700-3S/54K 35.0 kW 52.0 kW
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By default, the boiler assigns system priority to DHW supply.
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The NCB700 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 additional heating expansion vessel may be required depending on size of the whole system.
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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.
2. Product Information