Navien Tankless Water Heater: Set up a cascade (assign sub unit IDs)
Set up a cascade (assign sub unit IDs) on a Navien tankless water heater: Cascade units are linked with Ready-Link cables and the main unit hands out the sub unit IDs.
Applies to: NPE-A2, NPE-S2
How to fix set up a cascade (assign sub unit ids): step by step
- Wire the cascade with Ready-Link cables and switch all units on.
- Main unit: hold Menu + Back 3 s, open 2. Cascade Status and Set > 3. Cascade System Setting, press OK at START.
- Sub unit: hold OK for 3 seconds; the panel shows 'ID 1. Allocated!' when the ID is received.
If the unit shows an error code, look it up: Navien Tankless Water Heater codes
Models
NPE-150S2NPE-180A2NPE-180S2NPE-210A2NPE-210S2NPE-240A2NPE-240S2
Source: Navien NPE-A2/S2 Installation Manual, 5.2.1 Configuring the Communication Settings, p.73. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.