Noritz SCU-401-24M System Controller for NCC199 and NCC300 (up to 24 units) - HCNAC1115
The SCU‐301‐24M is made from premium materials, this Water Heater Part offers great function and value for your home. This fixture is part of Noritz's decorative Collection, so make sure to check out other styles of fixtures to accessorize your room.
Noritz has been an innovator in the water heating industry for over 60 years. Noritz introduced the first modern, electronically controlled tankless hot water heater in 1981 and we remain the leader in energy savings and superior hot water delivery today. Serving both homeowners & commercial users across the U.S. and Canada, Noritz America offers a broad range of tankless gas water heaters to meet the varying needs of its broad spectrum of customers.
Features
- System Controller for 13 to 24 Units
- Will Automatically Rotate Heaters for Balanced Run Time
- Will fire heaters proportional to demand
- Alternates lead heater every 8 hours of run time, or 24 hours of elapsed time
What our Experts Think
-
Large-scale system control: Designed to manage multiple Noritz NCC199 and NCC300 tankless water heaters, supporting complex high-demand installations
-
Massive capacity support: Controls up to 24 units, making it ideal for large commercial or multi-building hot water systems
-
Smart load balancing: Automatically distributes demand across units to optimize efficiency and reduce wear on individual heaters
-
Rotating operation logic: Staggers and alternates lead units to ensure even runtime and extended equipment lifespan
-
Demand-based firing control: Proportional activation ensures only required units run, improving energy efficiency and system stability
-
Centralized control hub: Allows operation of the entire system through a single controller interface, simplifying management
-
Built for commercial reliability: Heavy-duty construction designed for hotels, apartments, hospitals, and large facilities
-
Advanced system communication: Coordinates heater response, monitoring, and fault handling across all connected units
Q&A
Q: What is the Noritz SCU-401-24M system controller?
A: The Noritz SCU-401-24M is a multi-unit system controller designed to manage and coordinate up to 24 Noritz NCC199 and NCC300 tankless water heaters in large-scale commercial systems.
Q: What is its main function?
A: It provides centralized control, load balancing, and communication between multiple water heaters, ensuring they operate efficiently based on hot water demand.
Q: How does it improve system performance?
A: It rotates operation between units, stages heaters based on demand, and balances runtime, helping reduce wear and improve overall system efficiency.
Q: What types of systems is it used in?
A: It is used in large commercial or high-demand hot water systems where multiple tankless units are installed in parallel for continuous supply.
Q: Does it support monitoring and control features?
A: Yes, it allows system-level monitoring and coordinated control of multiple heaters through a single controller interface, simplifying operation of large setups.
Q: Why is a system controller needed in multi-unit installations?
A: It ensures even usage across all heaters, prevents overloading a single unit, and maintains consistent hot water delivery under high demand conditions.
Maintenance Tips
-
Check communication network monthly: Ensure all NCC199/NCC300 units are properly detected and communicating to prevent staging or load-balance issues.
-
Inspect control wiring: Verify data cables, connectors, and remote cords are tight, dry, and undamaged to avoid system dropouts.
-
Review operating rotation: Confirm automatic heater rotation (lead/lag switching) is functioning for even wear across up to 24 units.
-
Monitor system logs: Regularly check for fault codes or irregular firing patterns to catch issues early across the cascade system.
-
Keep controller clean & ventilated: Dust-free environment prevents overheating or signal interference in the control module.
-
Test pump control functions: If recirculation is used, verify timer/aquastat control and pump activation are working correctly.
-
Verify load balancing behavior: Ensure units fire proportionally based on demand for optimal efficiency and fuel savings.
-
Annual professional inspection: Have a technician validate system staging logic, communication integrity, and multi-unit synchronization.
Damage 
Loss 
Theft 
![Chery Industrial [BARGAIN] 7' Garage Storage Cabinets with 20 Drawers - A_WW000208](http://backyardprovider.com/cdn/shop/files/bargain-7-ft-work-bench-with-20-drawers_30.png?v=1775546940)
