Installation Manual

ManualsBrandsNoritz ManualsWater Heater Parts & AccessoriesSystem Controller - For NCC199 and NCC300 (Up to 24 Units)

SBB80UX

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

6. Remote Controller ...................................................... 8

7. Remote initial setup .................................................. 10

8. Recirculation Pump Timer Setup .............................. 14

System Check Button

................................................... 16

10. Maintenance Monitors and Additional Settings

.........

11. Additional Remote features

..........................................

12. Additional System Controller Features

.......................

13. System design, Gas, and Water piping

......................

14. Follow-up Service .................................................... 29

15. Dimensions .............................................................. 30

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. 04/17

Installation Manual

─1─

Summary of content (30 pages)

PAGE 1
System Controller SCU-401-12M,-24M Installation Manual 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 WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
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Check for any missing items before starting installation. 1. Included Accessories Part Shape Qty Anchoring Screw Part *1 Assembly & Setup Instructions 5 Shape Qty 1 *1 Attached in the system controller. 2. Optional Accessories Name Remote controller RC-9018M Remote controller Cord RC-CORD10 RC-CORD26 NWC-ADAPTER (NAW-1 US) Usage Qty * Always necessary. 1 -The communication cord between the system controller and the remote controller can be lengthened up to a maximum total length of 450 feet.
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. Introduction (see list of points below) Introduction to the “SCU-401” System Controller Overview This manual is intended to provide instruction for the installation, operation, and features of the SCU-401 system controller. It is divided into 4 main sections: 1. Installation of the SCU-401 system controller 2. Initial programming of the remote controller 3. Additional features of the remote controller and the SCU-401 system controller 4.
PAGE 4
. Installing the System Controller Securing to the wall Be sure to do ● The weight of the device will be applied to the wall. If the strength of the wall is not sufficient, reinforcement must be done to prevent the transfer of vibration. ● Do not drop or apply unnecessary force to the device when installing. Internal parts may be damaged and may become highly dangerous. ● Install the unit on a vertical wall and ensure that it is level.
PAGE 5
WARNING Electrical Shock Hazard Do not turn power on until electrical wiring is finished. Disconnect power before servicing. Failure to do so may result in death or serious injury from electrical shock. • The electrical supply required by the system controller is 120VAC at 60 Hz. Use an appropriate circuit. • Do not let the power cord contact the gas piping. Tie the redundant power cord outside the system controller.
PAGE 6
Connection with Water Heater Connect the communication cords with the water heaters. Before making wiring connections from each unit to the system controller, make sure that the electrical power of each unit including the system controller has been disconnected. Slave controller 1 1. Remove the front cover from the system controller and the cover of the external remote controller cord terminal block of each water heater. Connecting the communication cord to Unit 1 2.
PAGE 7
5. Wiring Diagram CAUTION • The below diagram shows the connection of 3 units to the system controller. When connecting 4 or more units, follow the same procedure. • Connect the water heaters to the system controller following the detailed wiring instructions included with the system controller. • Always connect a remote controller to the system controller. * The remote controller terminal location may differ depending on the unit.
PAGE 8
6. Remote Controller Remote Controller (Required Accessory : RC-9018M) The remote controller will emit a tone when a button is pressed. * This Remote Controller is not resistant to water, steam, chemicals, or UV rays. Install it in a location where it will not be exposed to these conditions. If it must be installed outdoors, use a weatherproof enclosure. Refer the RC-9018M Installation Manual for details. Alarm Off Button / Indicator (Red) Stops the tone that is emitted when an error occurs. (page 29.
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Screen Display * The screen display shown below is for illustration purposes only. The actual display will vary depending on how the water heater is being used. * After a button is pressed, the display will gradually become darker to prevent unnecessary power consumption by the remote controller. Flame Symbol The flame symbol is displayed during combustion when using hot water or recirculation functions.
PAGE 10
7. Remote initial setup Initial Setting Procedure in the “System Settings” Screen Note: When power is first connected to the multi-unit system (system controller and units), the remote enters an initial setting mode. The following instructions explain how to perform an initial setting. If you need to change these settings at a future date, follow the instructions titled System Selection and Settings in the “Initial Settings” Screen (page 11 - 13).
PAGE 11
System Selection and Settings in the “Initial Settings” Screen Note: Use this procedure if you need to change the system type or settings after running the “initial setting procedure” List of the Initial settings System type The system type can be changed. Sys settings The system settings can be changed. [°F/gal]<=>[°C/L] The unit of temperature and flow rate on the screen can be changed. The gap of time per month on the clock can be adjusted.
PAGE 12
Operation Screen Display Description Change System Settings. 1 2 In the initial settings menu select “Sys settings”. 1) The “Sys settings” menu will display several options for the selected system type. 2) Press the button to select the system setting you would like to alter. 3 1) Use the * You may use the button to return to the previous menu at any time. buttons to turn the feature on (“yes”) or off (“no”). button to 2) Press the select “yes” or “no”.
PAGE 13
Operation Screen Display Description Change the way the units of temperature and flow rate are displayed on the screen (standard vs. metric). 1 2 1) In the initial settings menu [°C / L]”. select “[°F / gal] 2) Press the 1) Use the button. * You may use the button to return to the previous menu at any time. buttons to select the unit “[°F / gal] “or “[°C / L]”. 2) Press the button to set the units to be displayed. 3) The display will say “Set complete” once an option is chosen.
PAGE 14
8. Recirculation Pump Timer Setup * This functionality is only available if you have selected “Recirc” as your system type in the “Initial Setting Procedure” and “System Selection and Settings” on page 10 to 11. Setting the Recirculation System Operation Timer For * With the recirculation operation timer set, hot water will be automatically circulated in the hot water pipes.
PAGE 15
Operation 4 Screen Display Description 1) Select "AM8:00" using 1) the * Every time when you press the button, the time changes by one hour. Here [To keep the current “End” time] buttons. Press the 2) button to 2) Press the complete the “End” time setting. 1) Select "Add" using 1) the button without changing the "End" time, and proceed to step 5. * You can set multiple operation time periods. buttons. 2) Press the button.
PAGE 16
9. System Check Button If you press the button, you can check the status of the system (Display Screen Example [System [Rcrc] ]) Cover shown in the open position. System Displayed on the Remote Controller System Description Water heater only operation. * Water heater and recirculation operation. * During recirculation operation, hot water is always circulated in the piping to provide instant hot water when a fixture is opened. [If you set the button to "ON", is displayed.
PAGE 17
10. Maintenance Monitors and Additional Settings * It is necessary to check the flow rate for Recirculation system, and Storage Tank Recirculation system (for adjusting the recirculation flow rate). ▲/▼ Buttons (1) Press Menu Button and press the ▼ Button several times to select "Sys monitor", and then press Enter Button. (2) Press the ▼ Button once to select "Yes", and then press Enter Button for five seconds or more. (3) Sys monitor is displayed.
PAGE 18
Additional settings of system controller Following setting can be changed in addition to the system settings. When determining whether or not to change a particular setting, please consult with the customer first. Power ON/OFF Button ▲/▼ Buttons - Item No. 19 When multiple units are connected to the system controller, two units fire upon startup as the factory default. However, this setting can be changed so that only one unit fires upon startup. - Item No.
PAGE 19
11. Additional Remote features For All Systems Clock Adjustment Cover shown in the open position. Operation 1 2 3 Press the Screen Display Description * This adjustment can be made regardless of whether the button inside the cover. Press the button is ON/OFF. button. 1) 1) Use the buttons to (Ex: AM10:15) reset the clock. 2) Press the button 2) * The time changes in 1-minute increments with each press of the button, and then in 10-minute increments if the button is kept pressed down.
PAGE 20
For All Systems Locking the Remote Controller By locking the remote controller, the settings cannot be accidentally changed if a button is pressed by mistake. Cover shown in the open position. Operation 1 Press and hold Screen Display Description * The operation can be locked button regardless if the for approximately 2 seconds to lock the remote controller. button is “ON” or “OFF”. * The operations of and , , buttons are locked.
PAGE 21
12. Additional System Controller Features System Controller Terminals (Optional Connections) System controller Circulation Pump Terminals 1,2 ● Use these terminals to control the pumps in any circulating system. Connected this way, the system controller will control the function of the pumps. Use normally open relays (electromagnetic switches) to supply power to the pumps. Use thermal relays if necessary. Connect them when they are used for recirculation system or storage tank recirculation system.
PAGE 22
System controller Warning Light Terminal Operation Light Terminal Pump 1 Pump 2 Warning Exhaust Operation Light Light Fan Pump 1 Pump 2 Warning Exhaust Operation Light Light Fan Connect to terminals Connect to terminals Warning light Operation light AC Power Supply AC100-240V Under 1A ● If you make the connections as shown above, the light will turn on when a failure (error code) of any water heater in the system is generated. It will remain lit until the failure has been resolved.
PAGE 23
Connections of Pressure Switch, External Operation Switch, and Thermostat (input terminals) System controller Pressure Switch Terminal * Do not connect communication cords with each unit or remote controller to these terminals by mistake. External Pressure operation switch switch Connect to terminals Remote controller 12V, 5.
PAGE 24
System controller External operation switch Terminal ● This terminal is short-circuited when the product is shipped from factory. When you use this feature, disconnect a short-circuit connector as shown below. External Pressure operation switch switch External operation switch Connect to terminals Remote controller 12V, 5.4mA External operation switch Disconnect this connector when external operation switch is connected.
PAGE 25
Hot water supply pipe (1 1/2” - 5”) Unit 12 ─25─ Unit 10 Remote Controller Cord ...... Unit 3 Unit 2 Unit 1 Cold water supply pipe (1 1/2” - 5”) Remote Controller Cord Remote Controller NWC-ADAPTER (NAW-1 US) * Size the cold water supply piping to allow for maximum flow rates of the units. • Insulate or apply heating materials to both the cold water supply piping and the hot water supply piping to prevent freezing during cold weather and to prevent heat loss through the piping.
PAGE 26
Hot water supply points ─26─ Unit 11 Unit 10 Remote Controller Cord .... Unit 2 Hot Water Supply Pipe (1 1/4” - 5”) (Size for max. flow) Unit 3 Unit 1 Expansion Tank Circulation pump 1 Circulation pump 2 (If necessary) Cold water supply pipe (1 1/4” - 5”) * Size the cold water supply piping to allow for maximum flow rates of the units. Set “Yes” for the question “Pump error check” in the Sys settings when connecting these wires to system controller (Refer to page 12).
PAGE 27
Unit 12 ─27─ Storage tank return line (copper or stainless steel pipe) (Size for max. flow) Remote Controller Cord Unit 3 Storage tank supply line (copper or stainless steel pipe) (Size for max. flow) Unit 10 Unit 2 Unit 1 Circulation pump 1 Circulation pump 2 (if necessary) Set “Yes” for the question “Start pump rotation?” in system settings (Refer to page 10).
PAGE 28
Gas piping * Follow the instructions from the gas supplier. Gas connection Gas Valve Gas flex lines are not recommended unless they are sized for the maximum input kW (Btu/h • MJ) of each unit. Install a gas shutoff valve for every unit installed. Do not use piping with a diameter smaller than the size of the gas inlet to each unit. After installation, check the gas line for any leaks before using.
PAGE 29
14. Follow-up Service Checking for Error Conditions When a failure occurs, information relating to the error blinks on the display. The error alarm may also continuously sound. ● Error Code Display Screen The display may indicate the type of failure that has occured depending on the system configuration. ● To Stop the Error Alarm Press the button (the indicator will turn off). Requesting Service * Service and warranty periods are based on the type of product and the application type.
PAGE 30
15. Dimensions 13.2" (336mm) 6.7" (170mm) 2.8" (70mm) 6-Ø0.2"x0.4" (6x10mm) OBLONG HOLE 1.4" (36mm) 7.9" (200mm) 0.4" (10mm) 13.8" (350mm) 13.1" (334mm) 5.5" (140mm) 4-Ø0.5" (13mm) 23.6" (600mm) 5.5" (140mm) 22.3" (566mm) 4-Ø0.5" (13mm) 23.6" (665mm) 3.9" (100mm) 3.9" (100mm) 0.4" (10mm) 6-Ø0.2"x0.4" (6x10mm) OBLONG HOLE 1.4" (36mm) 2.8" (70mm) 6.