Navien NPE-180A Installation Manual

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

Navien NPE-180A Installation Manual Manual pdf 68 page image

68 Appendixes5.8 Navien On-Demand Control Kit (Optional)Navien On Demand Control Kit is an add-on input board for the Navien NPE-A series water heaters. It addssignal input functions to the NPE-A series water heaters for more efficient DHW hot water recirculationfunctionality.With the On Demand Control Kit, DHW recirculation is carried out exactly when the actual demands arise.This prevents energy loss caused by unnecessary operation of the burner a nd pump throughout th e day.The On Demand Control Kit can receive signals from multiple push buttons installed in various areas andperforms optimal DHW recirculation only when there is a demand for hot water.CAUTIONThis device is designed to work with the NPE-A series models ONLY.Basic PrinciplesThe following diagram shows the basic operation of an NPE-A series water heater system with the Navien On-Demand control kit.CAUTIONThe Navien On-Demand control kit can be used ONLY with a water heater system configured for DHW recirculation.DHW return(to recirculation inlet)(to hot water fixtures)DHW supplyCold water lineCity water supply1 2 3 4ONSW1CE1RA1U1CE1C1C2C7R6SW1Q112 V SIGNALSIGNAL 1GND 5 VJ1R5J2C4ZD1R7D1 CON3CON2CON1SIGNALSIGNAL 3GNDSIGNAL 2To cold water inletPush buttoncontact signalPush buttoncontact signalPush buttoncontact signalFor details, refer to the installation manual that is provided with the On-Demand control kit.

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