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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4.6.20. Bypass Mixing Valve (“Non-A” Series)<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 />
AAVC9EXMIX01 Check Point I<br />
1. Mixes hot water from the heat exchanger with cold water from the water<br />
inlet in order to modulate and control outlet water temperature.<br />
1. <strong>Water</strong> leakage from the bypass mixing valve<br />
2. The valve cannot modulate or make open/close positions.<br />
1. Stop operating once detecting water leakage.<br />
2. Temperature fluctuations in the hot water outlet.<br />
E045<br />
1. Visual inspection: Connection and/or breakage of wires.<br />
Clean the Domestic cold water inlet filter.<br />
2. Voltage check: Check range of voltage shown below.<br />
1. Red – black : DC 7 ~ 13 V<br />
2. White – black : DC 0 ~ 13 V<br />
3. Blue – yellow : Pulse<br />
4. Pink – orange : Pulse<br />
Feedback<br />
Flow adjust<br />
The physical appearance of the bypass mixing valve is similar to that of the water adjustment valve.<br />
However, their functions differ and cannot be substituted for each other.<br />
©<strong>Navien</strong> America Inc. 2010<br />
62<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0
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