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2.2 NPE-A2/S2 System
For more information about external recirculation mode and DIP
switch settings, refer to the NPE A2/S2 Installation Manual.
2.2.1 Setting External Recirculation Mode
To use the external recirculation mode:
1. Connect the water supply to support recirculation.
2. Set the 2-way valve inside the water heater to “EXT.“