72 Installing a Cascade System
5. After an ID is assigned to each sub unit, press the
OK button (
) on the main unit. The temperature
information on the main unit’s display will sync
with the sub unit’s display.
Note
●
To add additional sub units later,
repeat step 3.
●
To cancel the cascade setup, press
and hold the Menu button (
) and
the Back button (
) simultaneously
for 3 seconds to access the Service/
Installer menu. Then select
2. Cascade Status and Set >
4. Cascade System Removal.
Now the water heaters will operate
independently.
●
To reassign a main unit, repeat steps
1 - 5.
5.2.2 Multiple Unit Series Cascade
Settings
Unit Combinations
Main Unit
Assignment
Sub Unit(s)
Assignment
Cascade
Protocol
Setting
Water Heaters
NPE + NPE-2 NPE NPE-2 NPE
NPE + NPE-2 +
NR or NP
NR or NP NPE, NPE-2 NR
NPE-2 + NR or NP NR or NP NPE-2 NR