SBB80UX-2
Disconnect
Power
Ground
System Controller
SCU-401-12M,-24M
Requests to Installers
Potential dangers from accidents during installation and use are divided into the following two categories.
Closely observe these warnings, they are critical to your safety.
WARNING indicates a potentially hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury.
WARNING
CAUTION
• Failures and damage caused by erroneous work or work not as instructed in this manual are not covered by the warranty.
• Refer to installation manual attached to the appliance as well.
• Check that installation was done in accordance with this Installation Manual upon completion.
• After completion of installation, be sure to hand this Installation Manual to the customer.
• When you fasten the screws on the terminals (Warning lamp terminal and so on),do not use electric drivers,
impact drivers and so forth.Tightening with excessive force may cause the terminals to be damaged and lead
to failures.
In order to use this product safely, read this installation manual carefully and follow
the installation instructions.
WARNING
Contents
1. Included Accessories ................................................. 2
2. Optional Accessories ................................................. 2
3. Introduction ................................................................ 3
4. Installing the System Controller ................................. 4
5. Wiring Diagram .......................................................... 7
------------------------------ [RC-9018M] -----------------------------
6. Remote Controller ...................................................... 8
7. Remote initial setup .................................................. 10
8. Recirculation Pump Timer Setup .............................. 14
9. System Check Button ................................................... 16
10. Maintenance Monitors and Additional Settings ......... 17
11. Additional Remote features .......................................... 19
------------------------------ [RC-7649M] -----------------------------
12. Remote Controller .................................................... 21
13. Remote initial setup ................................................. 22
14. Additional Remote features .......................................... 25
----------------------------------------------------------------------------
15. Additional System Controller Features ....................... 28
16. System design, Gas, and Water piping ...................... 32
17. Follow-up Service .................................................... 36
18. Dimensions .............................................................. 37
----------------------------Service Manual ---------------------------
19.Procedure for replacing Main Controller in the System Controller ..... 38
20.Procedure for replacing Sub Controller in the System Controller ...... 39
If at any time during the installation and setup of this product you have questions or concerns, contact Noritz America at 866-
766-7489 or visit http://support.noritz.com/.
Rev. 03/21
Note: If the system controller (SCU-401-12M,-24M) is installed in conjunction with the NC380-SV-ASME (with
remote controller RC-7649M), the initial settings (refer to page 22) must be followed. Failure to change the
initial settings may result in an error code “730” appearing on the remote controller.
Installation Manual
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