Commercial Noritz Water Heater Multi-System Application Sheet

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1 Commercial Noritz water heaters can be used individually or in a Multi-System (2+ units) when used with either a Quick Connect Cord or a multi-unit. QC-1 (Quick Connect Cord) SC-1-6M SC-1-12M SC-1-24M Quick Connect Cord QC-1 SC-1-6M SC-1-6M-EXT(-OD, -EXT) SC-1-12M SC-1-24M Quick Connect Cord and s for Use with Multi-Systems 2 Units Only Noritz Commercial Unit Model No. Without Storage With Storage Tank Tank Up to 6 Units Up to 12 Units Up to 24 Units NC199-OD QC-1 SC-1-6M-EXT-OD SC-1-6M-EXT-OD N/A N/A NC199-DVC QC-1 SC-1-6M-EXT-DVC SC-1-6M-EXT-DVC N/A N/A NC199-DVC-CA QC-1 SC-1-6M-EXT-DVC SC-1-6M-EXT-DVC N/A N/A NCC199-SV QC-1 SC-1-6M SC-1-6M SC-1-12M SC-1-24M NCC199-DV QC-1 SC-1-6M SC-1-6M SC-1-12M SC-1-24M NC-SV-ASME QC-1 SC-1-6M SC-1-6M SC-1-12M SC-1-24M NC-DV-ASME QC-1 SC-1-6M SC-1-6M SC-1-12M SC-1-24M NC38-SV-ASME QC-1 SC-1-6M SC-1-6M SC-1-12M SC-1-24M Various Multi-System Applications With Compatible s

2 2-Unit Quick Connect System Two Noritz Commercial water heaters installed in parallel can provide hot water to fixtures at twice the capacity as compared to when a single unit is used. The Quick Connect Cord (QC-1) is used to link two identical units together in a simple installation. This connection acts as a communication link between the two units and provides the following features: 1) Doubles the output of the system by allowing the secondary unit to fire when the primary unit reaches capacity 2) Rotates the operation of the two units evenly to prevent premature wear on one unit Quick Connect (QC-1) Isolator Kit Globe Valve Pump 2-Unit Quick Connect System Quick Connect Cord can only be used for a 2-unit Multi-System. Only one should be connected to the primary unit while the Quick Connect Cord is attached to the proper connectors labeled QUICK CONNECT CORD located inside both units. When the Quick Connect is in use, an will be required on the recirulation line to efficiently control the recirculation pump. The should be set at F below the set output temperature of the water heater. Size the recirculation pump for 2 GPM through the system at feet of head plus piping losses. Adjust the flow using a globe valve and verify the flow rate with the maintenance monitors. NOTE: If you are using a 2-unit system with a storage tank, please use SC-1-6M(-EXT)(-OD, -DVC) for the application instead of the Quick Connect Cord. The includes a feature that modifies the operation of the 2 units by providing optimum performance for a specific application such as a storage tank, recirculation, or a filtration system. See Page for more details regarding the System Select Connectors.

3 Multi-System Application For Up to 6 Units Up to 6 Noritz Commercial water heaters installed in parallel with a can provide hot water to fixtures at up to 6 times the capacity as compared to when a single unit is used. models SC-1-6M(-EXT)(-OD, -DVC) are available and can be used to manifold up to 6 identical units together while providing the following features: 1) Increases the output of the system with the ability to add more BTU s per added unit. 2) Rotates the operation evenly within the Multi-System to prevent premature wear on one unit. External for up to 6 Units (SC-1-6M-EXT-OD) (SC-1-6M-EXT-DVC) for up to 6 Units (SC-1-6M) Isolator Kit Globe Valve Pump Multi-Unit Application for Up to 6 Units The #SC-1-6M(-EXT)(-OD, -EXT) can be used for a multi-system that has 3 to 6 units. Only one should be attached to the proper connections on the labeled REMOTE CONTROLLER TERMINAL BLOCK. When installating the piping, an will be required on the recirulation line to efficiently control the recirculation pump. The should be set at F below the set output temperature of the water heater. Size the recirculation pump for 2 GPM through the system at feet of head plus piping losses. Adjust the flow using a globe valve and verify the flow rate with the maintenance monitors. NOTE: If you are using a 2-unit system with a storage tank, ensure that the System Select Connectors are properly set to provide optimum performance from the multi-system. See Page for more details regarding the System Select Connectors.

4 Multi-System Application For Up to 12 or 24 Units Up to 12 or 24 Noritz Commercial water heaters installed in parallel can provide hot water to fixtures at up to 24 times the capacity as compared to when a single unit is used. models SC-1-6M(-EXT)(-OD, -DVC) are available and can be used to manifold up to 6 identical units together while providing the following features: 1) Increases the output of the system with the ability to add more BTU s per added unit. 2) Rotates the operation evenly within the Multi-System to prevent premature wear on one unit. for up to 12 or 24 Units SC-1-12(-24)M Globe Valve Pump Multi-Unit Application for Up to 12 or 24 Units The #SC-1-12(-24)M can be used for a multi-system that has 3 to 12 (or 24) units. Only one should be attached to the proper connections on the labeled REMOTE CONTROLLER TERMINAL BLOCK. When installating the piping, an will be required on the recirulation line to efficiently control the recirculation pump. The should be set at F below the set output temperature of the water heater. Size the recirculation pump for 2 GPM through the system at feet of head plus piping losses. Adjust the flow using a globe valve and verify the flow rate with the maintenance monitors. NOTE: If you are using the system with a storage tank, ensure that the System Select Connectors are properly set to provide optimum performance from the multi-system. See Page for more details regarding the System Select Connectors.

5 Multi-System Application with Storage Tank A hot water storage tank can be used with the system when a specific application requires higher flow capacity with minimum pressure loss. With the proper model, the system can handle from 2 up to 24 units that would provide recovery heat to the storage tank while controlling the primary pump in the system. The time in which hot water in the storage tank reaches the required temperature depends on the amount of BTU s that is applied to the system, which is directly proportional to the number of units installed in the multi-system. Refer to the Noritz Specification Sheets that include data for BTU and flow capacity ratings to properly size for your specific application. for up to 12 or 24 Units SC-1-12(-24)M for up to 6 Units (SC-1-6M) Isolator Kit Thermostat Pump 1 Pump 2 Multi-Unit Application with Storage Tank For SC-1-6M, the System Select Connectors must be properly adjusted when the system is used with a Storage Tank or Recirculation System. Attach the clip labeled SELECTER to the Storage System plug to modify the system for optimum use with a storage tank. For SC-1-12/-24M, the System Select Connectors can be found near the dipswitches which is centrally located within the device. Unlike the SC-1-6M, the necessary connector(s) need to be detached for use with the proper system. When the units are installed with a storage tank, disconnect the connector labeled STORAGE SYSTEM. Selecter Filtration System (3) Storage System (2) Recirculation System (1) Warning Light Warning Light Operation Relay Operation Relay Fan Fan Pump1 Pump1 Pump2 Pump2 M AX W AC1V System Select Connectors (1) Recirculation System (2) Filtration System (3) Storage System DIPSW Only one is installed for the whole system. Use the Control Terminal Block to complete System Select Connectors for SC-1-6M System Select Connectors for SC-1-12(-24)M

6 Model No. Temperature Rise ( F) Flow Rate Capacity (GPM) Flow Rate Capacity (GPH) Flow Rate Capacity (GPM/GPH) NC199 Series NCC199 Series NC Series NC38-SV-ASME unit unit unit unit unit unit unit unit unit unit unit unit unit unit NC199 Series Pressure Loss NCC199 Series Pressure Loss (psi) : F) : 1 F or less) Pressure Loss (psi) Set temperature: 13 F or higher : 17~18 F) Set temperature: 1 F or less : 1 F or less) NC Series NC38 Series Pressure Loss (psi) : 17~18 F) Set temperature: 1 F or less : 1 F or less) Pressure Loss (PSI) : 17~18 F) Set temperature: 1 F or less : 1 F or less) NOTE: For Quick-Connect and Multi-System installations, pressure loss remains constant throughout the system regardless of the number of units installed. Multiply the total number of units in the system by the required flow rate from each unit to determine the total pressure loss from the chart above.

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