Navien NaviCirc Series - System Application and Installation; Navien NPE-A System Integration; NPE-A System Application Guidelines

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2. Application System
2.1 NPE-A System
2.1.1 Application Guidelines
See the installation guidelines below for additional instructions.
1. Locate the 10-switch set of dipswitches on the front panel and
verify that DIP SW2 is ON for EXTERNAL recirculation.
1 2 3 1 2 4 5 6 7 8 9 10
ON ON
1-OFF
2-ON
2. On the front panel, press the Power button to turn o the
water heater.
3. Enter the R&D information menu by pressing the Up [+] button
three times, the Down [-] button three times, and then the Up
[+] button four more times.
Note
Maximum recirculation pipe lengths:
●
100 feet (30 m) equivalent length of ½” copper pipe
●
400 feet (120 m) equivalent length of ¾” copper pipe
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