Navien NPE-180A Service Manual

Also see for NPE-180A: Installation manual Installation & operation manual Specification sheet Installation manual Operation manual

Contents

Navien NPE-180A Service Manual Manual pdf 162 page image

H2Air++ 16110.3 Wiring the DeviceThis section provides information required to plan and install thesystem wiring.10.3.1 System Wiring ExamplesRefer to the following wiring diagrams to properly install wiring forvarious setups you may need in your system. Set DIP switch (SW)#3 as specified for each configuration.1-Stage Thermostat / 2-Stage Control SystemSet DIP switch (SW) #3 to ‘Off’ to configure the system to use a1-stage thermostat/ 2-stage control.1-Stage Thermostat / 1-Stage Control SystemSet DIP switch (SW) #3 to ‘Off’ to configure the system to use a1-stage thermostat / 1-stage control.5. Install the H2Air++ onto the NPE-180A/240A water heater’s PCBtray. Align the latch at the back of the case with the front lip ofthe PCB tray.6. Align the two latches at the back of the H2Air++ with the twocatch bars at the back of the water heater’s PCB tray. Thenpivot the H2Air++ onto the PCB tray until the latches snap-onto the catch bars.7. Connect cables to the H2Air++. For more details, refer to “10.5.2Entering the R&D Information Menu”, on page 165.8. Set the proper DIP switches for the desired installation setup.For more details, refer to “Dip Switch Function Table”, on page159.9. Replace the PCB tray back into the water heater and secure itwith the two screws.10. Close the front cover and secure it with the 4 screws.CAUTIONBefore disconnecting cables inside the unit, label all cables.Wiring errors can cause improper operation and dangeroussituations. Verify wiring connections and unit operation afterservicing.