Navien NP Condensing Tankless Gas Water Heater - Service Manual
Navien NP Condensing Tankless Gas Water Heater - Service Manual
Navien NP Condensing Tankless Gas Water Heater - Service Manual
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4.6.17. Secondary Heat Exchanger<br />
<strong>Navien</strong> Part No.<br />
Function<br />
Failure Event<br />
Effects<br />
Error Code<br />
Diagnostic<br />
Color /<br />
Number of wires<br />
1. Main part for heat transfer from the burner.<br />
2. There is additional path of water pipes on the heat exchanger surface<br />
as well as inside the combustion chamber and it minimizes the heat loss.<br />
1. <strong>Water</strong> and/or exhaust gas leakage through a crack.<br />
2. Improper heat transfer can cause the water in heat exchanger to boil.<br />
1. The unit will stop operating once detecting water leakage.<br />
2. Exhaust gas leakage.<br />
3. Make boiling sound.<br />
E001, E016, E030, E037<br />
1. Visual inspection: check if there is a crack on the surface of heat exchanger.<br />
2. Sound inspection: check if there’s boiling noise.<br />
N/A<br />
N/A Check Point N/A<br />
©<strong>Navien</strong> America Inc. 2010<br />
59<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0
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