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INSTALLATION ADJUSTMENT SERVICE
IMPORTANT! Provide serial number when ordering parts!!
INSTALLATION AND FIELD ADJUSTMENTS ARE THE
RESPONSIBILITY OF INSTALLER. READ ALL
1. Leonard Nucleus Valves are factory pre-assembled and
tested and include digital mixing valve and controls
which function as a system to meet both high and low
demand for tempered water.
2. System should be installed at a location where it can
easily be cleaned, adjusted or repaired.
3. System supplies must be connected as shown (Hot-left,
Cold-right). Exercise caution when soldering.
Maximum Operating Pressure 125PSI (8.6 BAR) for Hot and Cold Water.
Hot Water Temperature Range: 120º - 180ºF (49º - 82ºC)
Cold Water Temperature Range: 39º - 80ºF (4º - 27ºC)
Temperature Adjustment Range: 65º - 180ºF (18º - 82ºC)
NUCLEUS VALVE
INSTALLATION
HOT INLET
MIXED OUTLET
INSTRUCTIONS PRIOR TO INSTALLATION
Model NV-150-LF – 1¼" Inlets, 1½" Outlet
Model NV-200-LF – 2" Inlets and Outlet
Model NV-300-LF – 3" Inlets and Outlet
1360 Elmwood Avenue, Cranston, RI 02910 USA
Phone: 401.461.1200 Fax: 401.941.5310
info@leonardvalve.com
Email:
Web Site: http://www.leonardvalve.com
COLD INLET
WARNING: This product can expose you to
chemicals including lead, which is known to the State
!
of California to cause cancer. For more information, go
to
www.P65Warnings.Ca.gov
4. Flush pipes thoroughly after system has been
connected.
5. This assembly
MUST be piped according to
LEONARD'S REQUIRED PIPING METHOD W.
6. Refer to pages 2-4 of this bulletin for correct Setup
Instructions.
Bulletin NUC-1
August, 2018
1
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Summary of Contents for Leonard NUCLEUS VALVE NV-150-LF
- Page 1 INSTALLATION AND FIELD ADJUSTMENTS ARE THE RESPONSIBILITY OF INSTALLER. READ ALL INSTRUCTIONS PRIOR TO INSTALLATION 1. Leonard Nucleus Valves are factory pre-assembled and 4. Flush pipes thoroughly after system has been tested and include digital mixing valve and controls connected.
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Page 2: Setup Instructions
ISOLATION VALVE WARNING The Leonard Nucleus Digital Mixing Valve is an electronically controlled device utilizing DC circuitry. The Green Wire Earth Ground Connector MUST be properly grounded to a nearby suitable earth ground prior to connecting the Outlet RTD Probe, Motor Wiring Harness and the Main Unit Power Supply. -
Page 3: Installation Instructions
INSTALLATION INSTRUCTIONS 1. The Nucleus Unit MUST be piped according to a Leonard Required Piping Method W (see page 31). 2. Mount valve body and plumb inlet and outlet connections. DO NOT introduce water to the valve until completion of these instructions. 3. Mount Nucleus Control Box to supplied Mounting Bracket and adjust the tuning screw on the bracket to desired position. Ensure all wiring exiting the box is accessible. 4. Connect Green Wire Earth Ground Connector to suitable nearby earth ground location. 5. Remove compression fitting from left side of the valve outlet. Slide RTD Probe #1 through the compression fitting and insert into the left side of the valve outlet. Tighten compression fitting by hand, and then tighten just 1/8 to 1/4 turn. DO NOT overtighten fitting. See page 30 for more detail. 6. If additional RDT probes and pressure sensors are included, install them at the appropriate locations. If ‘IF‐RTS’ option is included, leave provisions for the RTD probe marked “RETURN” to be installed on the tempered return line (1/2” NPT Connection). Tighten compression fittings by hand, and then tighten just 1/8 to 1/4 turn. DO NOT overtighten fittings. See page 30 for more detail. Plug in pressure sensor harnesses into the pressure sensors. 7. Connect and tighten Motor Wiring Harness, if needed. 8. Open all inlet and outlet check‐stops and ball valves to pressurize Nucleus valve. 9. Plug power supply into 110V receptacle. GFCI receptacles are recommended. Installer to follow local electrical codes. 10. Powering Valve Control Box will cause the valve motor to initiate a FULL VALVE SWEEP (End to End), indicating that the motor has traveled 900‐1500 Steps. Following the FULL SWEEP, the valve is ready for commissioning and the LED Screen will display the following: ERR: 1 EEPROM Commission Unit 11. Installer will then press the ENTER key which will lead to the following LED screen display CUR TEMP: XXXF... - Page 4 Nucleus Digitally Controlled Mixing Valve User Interface The Nucleus Digitally Controlled Mixing Valve consists of an electronics box that is simplistic in design and has a user interface that is intuitive. The Overlay pictured above is a graphical representation of a typical plumbing system where a Digital Thermostatic Mixing Valve provides mixed hot water to the plumbing system. At key locations on the diagram, there are 6 LED indicators that provide system status either “within range” (Green) or “out of range” (Red) and they are as follows: Inlet Hot Water Pressure (P1), Inlet Hot Water Temperature (T1), Inlet Cold Water Pressure (P2), Inlet Cold Water temperature (T2), Mixed Water Temperature Sensor (T3), and Return Water Temperature Sensor (T4). Above the Overlay is a 2 Line, 16 character LED digital display screen, which serves as the User Interface by utilizing a simple 3‐button keypad interface:▲, ▼ and ENTER On Initial Power up, the valve will go through a full sweep function, which moves the motor its ...
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Page 5: Home Screen
User Screens Home Screen: Current outlet temperature and Set point temperature Home Screen: After initial “Full Sweep” the digital display indicates current measured temperature on the mixed outlet of the valve (T3) and shows set point temperature on the line below. Note: A large negative value displayed at the Cur temp line indicates the sensor is damaged or not properly wired to the main control board. Temperature is easily adjusted by pressing the ENTER key and pressing the ▲ and ▼ keys to adjust temperature up or down. When desired value is reached, pressing the ENTER key will store the new set point temperature the valve will target and a message stating that the set point has been saved will be displayed. If no new temperature is saved, the screen display will revert back to the Home Screen after approximately 10 seconds and the set point will remain unchanged. Symbols + and – indicate whether the outlet temperature is being adjusted higher (+) or lower (‐) by the controller. Standard Menu: Options on Board/Equipped: Pressing either the ▲ or ▼ keys will allow a user to scroll through other data points, features and options of the valve and will show the following screens and features in order. Note: ▼ key was used for this manual’s sequence and should be considered forward direction in the menu. Pressing the ▲ key will reverse the order and can be considered reverse direction. Menu Screen 1: Inlet Hot Water Temperature Pressing ▼ 1 time displays Hot temp: XXX F or C This screen displays actual hot water inlet supply temperature as measured at RTD (T1) if the ... -
Page 6: Menu Screen
Menu Screen 2: Inlet Cold Water Temperature Pressing ▼ 2 times displays Cold temp: XXX F or C This screen displays actual cold water inlet supply temperature as measured at RTD (T2) if the Nucleus is so equipped with the optional inlet temperature sensors. Note: A large negative value displayed at the Cold temp line is an indication that there is no sensor installed to the main control board, the wiring to the main board is improper or the sensor is damaged. Menu Screen 3: Return Water Temperature Pressing ▼ 3 times displays Rtrn temp: XXX F or C This screen displays actual return water temperature if the Nucleus is equipped with the ... - Page 7 Pressing ▼ 4 times displays Hot psi: XX.XX This is a measurement of the inlet hot water supply pressure (PSI) available to the mixing valve if the Nucleus is so equipped with the optional Pressure Sensor (P1). Note: A large negative value displayed at the Hot psi line is an indication that there is no sensor installed to the main control board, the wiring to the main board is improper or the sensor is damaged. Menu Screen 5: Inlet Cold Water Pressure Pressing ▼ 5 times displays Cold psi: XX.XX This indicates of the inlet cold water supply pressure (PSI) available to the mixing valve if the Nucleus is so equipped with the optional Pressure Sensor (P2). Note: A large negative value displayed at the Cold psi line is an indication that there is no sensor installed to the main control board, the wiring to the main board is improper or the sensor is damaged. Menu Screen 6: Optional Daughter Board Pressing ▼...
- Page 8 Note: If the Nucleus control box is equipped with a Daughter Board the following will show: This Menu Screen will be followed by the additional screens associated with the optional equipment that may or may not be incorporated into the Nucleus configuration. The following additional equipment may be on board: 4 additional Temperature Probes (RTD’s) T5, T6, T7, T8, 2 Flow Meters (F1 & F2) and/or 1 additional pressure sensor (P3) which are standard 4‐20mA inputs (See Page 28 for details regarding Daughter Board) Menu Screen 7: Optional Temperature Probe 5 (T5) Pressing ▼ 7 times displays Temp 5: XXX F or C This indicates and displays actual temperature as measured on RTD (T5) if the Nucleus is so equipped with the optional temperature sensors. Note: A large negative value displayed at the Temp 5 line is an indication that there is no sensor installed to the main control board, the wiring to the main board is improper or the sensor is damaged. ...
- Page 9 Menu Screen 8: Optional Temperature Probe 6 (T6) Pressing ▼ 8X displays Temp 6: XXX F or C This indicates and displays actual temperature as measured on RTD (T6) if the Nucleus is so equipped with the optional temperature sensors. Note: A large negative value displayed at the Temp 6 line is an indication that there is no sensor installed to the main control board, the wiring to the main board is improper or the sensor is damaged. Menu Screen 9: Optional Temperature Probe 7 (T7) Pressing ▼ 9 times displays Temp 7: XXX F or C This indicates and displays actual temperature as measured on RTD (T7) if the Nucleus is so equipped with the optional temperature sensors. Note: A large negative value displayed at the Temp 7 line is an indication that there is no sensor installed to the main control board, the wiring to the main board is improper or the sensor is damaged. Menu Screen 10: Optional Temperature Probe 8 (T8) Pressing ▼ 10 times displays Temp 8: XXX F or C This indicates and displays actual temperature as measured on RTD (T8) if the Nucleus is so equipped ...
- Page 10 Menu Screen 11: Optional Flow Sensor (F1) Pressing ▼ 11 times displays Flow 1: XXX This indicates and displays actual flow in (GPM) on Flow channel 1 for the optional Daughter Board. See Page 28 for wiring setup. Note: A large negative value displayed at the Flow 1 line is an indication that there is no sensor installed to the main control board, the wiring to the main board is improper or the sensor is damaged. Menu Screen 12: Additional Optional Flow Sensor (F2) OR Optional Pressure Sensor Input Channel (P3) Pressing ▼ 12 times displays Flow 2: XXX or Psi 3: XX.X This indicates and displays actual flow in (GPM) on Flow channel 2 for the optional Daughter Board. See Page 28 for wiring setup. NOTE: This channel can also be configured to accept a Pressure Sensor as an alternate and can be ...
- Page 11 Menu Screen 15: Building Management System Module Pressing ▼ 15X displays BMS Connected: N or Y In order for this to be 'Y', or YES, the control box needs the following conditions: The Leonard supplied ProtoCessor needs to be installed on the main Printed Circuit Board. This screen confirms that the protocol converter is communicating with the main PCB. If ‘N’ is displayed and...
- Page 12 Menu Screen 15: Building Management System Module Pressing ▼ 16 times displays FW Rev: X.X.X.X This screen shows the current version of Firmware loaded into the Nucleus processor. It may be used for reference and troubleshooting. Home Screen: Current outlet temperature and Set point temperature Pressing ▼ 17 times displays Cur Temp: XXX F or C The user is returned to the ‘Home Screen’ which displays current temperature as measured on valve outlet (T3) and the set point temperature on the line below. Note: A large negative value displayed at the Cur temp line indicates the sensor is damaged or not properly wired to the main control board. Note: Pressing the ▲ key will reverse the order previously shown and allow the user to scroll through the above menu items in reverse order.
- Page 13 Nucleus Digitally Controlled Mixing Valve Commissioning The commissioning menu on the Nucleus Digitally Controlled Mixing Valve is entered by pressing a sequence of keys on the keypad as a “protected” step as this requires the end‐user to be aware of potential changes to the programming and the subsequent associated potential risk to users downstream of the device. WARNING: You are about to enter commissioning menu of the Nucleus Digitally Controlled Mixing Valve and adjustments to the mixing valve may result in severe burns, injury and/or death to users downstream of the device if proper safety precautions are not adhered to.
- Page 14 Commissioning Menu Screen 2: Temperature Scale Pressing ▼ 1 time displays Min temp Initial Screen in commissioning menu requests the scale of temperature measurement in Fahrenheit (F) or Celsius (C) Commissioning Menu Screen 3: Minimum System Temperature Pressing ▼ 2 times displays Min temp This is minimum temperature as measured on the primary outlet temperature sensor of the Nucleus Mixing Valve RTD (T3). Measured values above this value will cause an alarm condition that will switch a relay to Normally Opened (See Page 27, Alarm Relay Detail). Default value is 65°F. Commissioning Menu Screen 4: Maximum Outlet Temperature Pressing ▼ 3 times displays Max temp This is maximum temperature as measured on the primary outlet temperature sensor of the Nucleus Mixing Valve RTD (T3). Measured values above this value will cause an alarm condition that will ...
- Page 15 Commissioning Menu Screen 5: Error Time to Make Live Pressing ▼ 4 times displays Err TTML This indicates the TIME TO MAKE LIVE, which is an elapsed time in seconds as to when an actual error will be identified by the processor (e.g. low inlet supply pressure) and then subsequently recognized as a true error and displayed on the LCD screen. The error must exist for at least this minimum time before being considered a true error. The default value is 15 seconds. Commissioning Menu Screen 6: Error Time to Live Pressing ▼ 5 times displays Err TTL This indicates TIME TO LIVE, which is a time in seconds and starts as soon as Err TTML has elapsed. An error that exists past both TTML and TTL will require user recognition to clear error from screen by pressing ENTER. If the problem corrects itself during the elapsing TTL time, the Error will be automatically removed from the display on the user interface and therefore does not exist in memory. Default time is 60 seconds. Commissioning Menu Screen 7: Auxiliary Flow Sensor #2 Pressing ▼ 6 times displays Aux2 flow: N or Y This indicates whether or not the configurable auxiliary channel, if utilized, is a 2 flow meter or a pressure sensor supplied with the Nucleus unit. Select ‘Y’ if a flow meter is used or ‘N’ if a pressure sensor is used. See Page 28 for proper wiring configuration...
- Page 16 Commissioning Menu Screen 8: Shuttle Full Sweep Pressing ▼ 7 times displays Commissioning Full sweep: N or Y This feature allows the user to manually ‘sweep’ the shuttle inside the main valve body from full hot to full cold position in order to verify mechanical integrity of the device, and verify that the valve is traveling the entire range of its expected travel or operating range. To initiate a full sweep, press ENTER and change the flashing value to ‘Y’ (yes) and press ENTER to confirm. Commissioning Menu Screen 9: Minimum Alarm Temperature for Temperature Sensor #5 Note: There are four (4) additional RTD temperature probe provisions (T5, T6, T7, T8) if the Nucleus is equipped with an optional Daughter Board. Please see Screen 6 (Page 7) from Options/Equipped section above and if Daughter Board is showing ‘Y’ (Yes), then these temperature probes should be configured, if they are being utilized. Pressing ▼ 8 times displays Commissioning Temp 5 min: 32F This is the minimum temperature for RTD probe T5. Any temperature below this setting at T5 will trigger an error message. Default setting is 32˚F.
- Page 17 Commissioning Menu Screen 10: Maximum Alarm Temperature for Temperature Sensor #5 Pressing ▼ 9 times displays Commissioning Temp 5 max: 185F This is the maximum temperature for RTD probe T5. Any temperature above this setting at T5 will trigger an error message. Default setting is 185˚F Commissioning Menu Screen 11: Minimum Alarm Temperature for Temperature Sensor #6 Pressing ▼ 10 times displays Commissioning Temp 6 min: 32F This is the minimum temperature for RTD probe T6. Any temperature below this setting at T6 will trigger an error message. Default setting is 32˚F. Commissioning Menu Screen 12: Maximum Alarm Temperature for Temperature Sensor #6 Pressing ▼11 times displays Commissioning Temp 6 max: 185F This is the maximum temperature for RTD probe T6. Any temperature above this setting at T6 will trigger an error message. Default setting is 185˚F...
- Page 18 Commissioning Menu Screen 13: Minimum Alarm Temperature for Temperature Sensor #7 Pressing ▼12 times displays Commissioning Temp 7 min: 32F This is the minimum temperature for RTD probe T7. Any temperature below this setting at T7 will trigger an error message. Default setting is 32˚F Commissioning Menu Screen 14: Maximum Alarm Temperature for Temperature Sensor #7 Pressing ▼ 13 times displays Commissioning Temp 7 max: 185F This is the maximum temperature for RTD probe T7. Any temperature above this setting at T7 will trigger an error message. Default setting is 185˚F Commissioning Menu Screen 15: Minimum Alarm Temperature for Temperature Sensor #8 Pressing ▼ 14 times displays Commissioning Temp 8 min: 32F This is the minimum temperature for RTD probe T8. Any temperature below this setting at T8 will trigger an error message. Default setting is 32˚F...
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Page 19: Thermal Disinfection
Commissioning Menu Screen 16: Maximum Alarm Temperature for Temperature Sensor #8 Pressing ▼ 15 times displays Commissioning Temp 8 max: 185F This is the maximum temperature for RTD probe T8. Any temperature above this setting at T8 will trigger an error message. Default setting is 185˚F ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ THERMAL DISINFECTION WARNING: The Nucleus Digitally Controlled Mixing Valve is equipped with the ability to program the valve to move to full hot position, which will allow ONLY high temperature hot supply water to enter the device and subsequently deliver that high temperature water downstream of the device. There is inherent risk in this procedure and it is a feature which allows the user to ‘Disinfect’ the plumbing system downstream of the device. Commissioning Menu Screen 17: Thermal Disinfection Pressing ▼16 times displays Commissioning Disinfect: N or Y BEFORE THIS MODE IS ENGAGED, AN AUTHORIZED USER MUST BE AWARE OF THE POTENTIAL RISKS TO END USERS DOWNSTREAM OF THIS DEVICE, AND MUST ALSO MAKE PROVISIONS TO PUT SAFETY MEASURES IN PLACE DURING THE DISINFECTION STAGE TO ENSURE USER SAFETY. - Page 20 Before a disinfection cycle is initiated, the MIN and MAX settings MUST be changed to accommodate higher outlet temperatures. MIN setting should be set to the minimum desired disinfection temperature. MAX setting should be changed to the maximum desired disinfection temperature. After the first minute of disinfection, an error will be triggered if the outlet temperature is below the MIN or above the MAX settings, which will automatically end the cycle. SEVERE BURNS, SEVERE INJURY AND/OR EVEN DEATH MAY OCCUR IF SUCH PROVISIONS ARE NOT IN PLACE WHEN SELECTING ‘Y’ ON THIS MENU! Once ‘Y’ (yes) is chosen, the authorized user will then be prompted to enter the desired disinfection time, adjustable in 15 minute increments, up to 12 hours. Choose the desired time and press ENTER to start the timer. Extreme care must be taken during the disinfection process! Disinfection can be cancelled at anytime by pressing the ENTER Key.
- Page 21 Once the disinfection cycle has ended, the valve will enter COOL DOWN mode and go back to its last position before disinfection was engaged. The screen will display the current outlet temperature. Cool down can be a lengthy process, as water will need time to cool via radiation. Provisions should be made to manually “dump” water from the loop if a faster cool down time is desired. SEVERE BURNS, SEVERE INJURY AND/OR EVEN DEATH MAY OCCUR IF SAFETY PROVISIONS ARE NOT IN PLACE WHEN MANUALLY DUMPING HIGH TEMPERATURE WATER. Controller will display MIN screen setting once COOL DOWN is complete. Change the MIN and MAX parameters to their previous values if system disinfection has been adequately implemented. ...
- Page 22 Commissioning Menu Screen 18: Manually Adjust Motor Pressing ▼ 17 times displays Commissioning Adj motor: N or Y SEVERE BURNS, SEVERE INJURY AND/OR EVEN DEATH MAY OCCUR IF SAFETY PROVISIONS ARE NOT IN PLACE WHEN MANUALLY ADJUSTING THE MOTOR POSITION! THIS ACTION SHOULD ONLY BE PERFORMED BY AUTHORIZED PERSONNEL This feature allows the user to manually move the motor to ensure that it is mechanically connected, mechanically sound, and moving properly with no mechanical binding. When “Y” is selected, the motor position is only being controlled by the authorized user and the screen will display the current position of the motor. Pressing ▲ will move the shuttle to allow more hot water into the valve, while pressing ▼ will move the shuttle to allow more cold water into the valve. To exit this mode, press the ENTER key. Once this mode has been exited, the valve will revert back to its standard operation. Commissioning Menu Screen 19: Erase Commissioned Settings Pressing ▼ 18 times displays Commissioning Erase EEPROM: N or Y SEVERE BURNS, SEVERE INJURY AND/OR EVEN DEATH MAY OCCUR IF SAFETY PROVISIONS ARE NOT IN PLACE WHEN ERASING COMMISSIONED VALUES! THIS ACTION SHOULD ONLY BE PERFORMED BY AUTHORIZED PERSONNELL This feature allows for the user to erase the Electrically Erasable Programmable Read Only Memory (EEPROM). Entering ‘Y’ will decommission the controller and return it back to factory settings. Once decommissioned the controller will no longer display or send errors to the Building Management System and alarms will no longer be triggered. These features will be inactive until the controller is re‐commissioned.
- Page 23 Commissioning Menu Screen 20: Save Commissioned Values Pressing ▼ 19 times displays Commissioning Save: N or Y This feature will save by selecting ‘Y’ all commissioning menu settings if they have been altered. Selecting ‘N’ will not save any altered values and will not commission the controller if it has not been commissioned. Selecting ‘N’ will also exit commissioning mode and the home screen will then be displayed. Commissioning Menu Screen 21: Exit Commissioning Mode Pressing ▼ 20 times displays Commissioning Exit: N or Y This feature will allow users to exit the commissioning menu or continue by selecting. Selecting ‘Y’ will exit commissioning mode without saving any changes made to the commissioning values will then be displayed. Selecting ‘N’ will keep the control box in the commissioning menu. ...
- Page 24 Nucleus Digitally Controlled Mixing Valve Error Codes Error codes are displayed on LCD screen once TTML has been exceeded. Errors must be manually cleared by pressing ENTER when TTL time has elapsed and the error condition has not been corrected. Error codes below are listed in order of importance to valve and system performance. ERROR CODE CAUSE ACTION Full sweep value less than 90% of Service internals of mixing valve and clean or commissioned value. This is likely due to replace parts. See page 34 for complete debris inside of the valve. service instructions ERPR Inlet pressure differential greater than 10% Investigate cause of pressure differential Outlet temperature probe disconnected Check wired connection to controller and ERT3OS from controller, not properly installed to confirm proper configuration (see page 28 for controller, or broken. wiring diagram). Replace probe if broken Inlet hot water temperature probe Check wired connection to controller and ERT1OS disconnected from controller, not properly confirm proper configuration (see page 28 for installed to controller, or broken. wiring diagram). Replace probe if broken Outlet temperature greater than 5°F above ...
- Page 25 Ensure sensor and harness are properly Inlet hot water pressure sensor connected. Check wired connection to disconnected from harness or controller, ERP1OS controller and confirm proper configuration not properly installed to controller or (see page 28 for wiring diagram). Replace broken probe if broken Ensure sensor and harness are properly Inlet cold water pressure sensor connected. Check wired connection to disconnected from harness or controller, ERP2OS controller and confirm proper configuration not properly installed to controller or (see page 28 for wiring diagram). Replace broken probe if broken Inlet hot water pressure is greater than 125 Investigate cause. Valve and related fittings ERP1+ are rated up to 125 PSI working pressure ERP1‐ Inlet hot water pressure is less than 40 PSI Investigate cause Inlet cold water pressure is greater than 125 Investigate cause. Valve and related fittings ERP2+ are rated up to 125 PSI working pressure ERP2‐ Inlet cold water pressure is less than 40 PSI Investigate cause Ignore error if no probe is present. Check Optional temperature probe (5) wired connection to controller and confirm ERT5OS disconnected from controller, not properly proper configuration (see page 28 for wiring installed to controller, or broken.
- Page 26 Temperature at probe (7) above configured ERT7+ Investigate cause maximum temperature Temperature at probe (7) below configured ERT7‐ Investigate cause minimum temperature Ignore error if no probe is present. Check Optional temperature probe (8) wired connection to controller and confirm ERT8OS disconnected from controller, not properly proper configuration (see page 28 for wiring installed to controller, or broken. diagram). Replace probe if broken Temperature at probe (8) above configured ERT8+ Investigate cause maximum temperature Temperature at probe (8) below configured ERT8‐ Investigate cause minimum temperature Ignore error if no sensor is present. Check Optional flow sensor (1) disconnected from wired connection to controller and confirm controller, not properly installed to ERF1OS proper configuration (see page 28 for wiring controller, or broken. diagram). Replace probe if broken Ignore error if no sensor is present. Check Optional flow sensor (2) disconnected from wired connection to controller and confirm ERF2OS controller, not properly installed to proper configuration (see page 28 for wiring controller, or broken. diagram). Replace probe if broken Ignore error if no sensor is present. Ensure ...
- Page 27 ALARM RELAY DETAIL SECTION DETAIL MASTER PCB ALARM NC COM NO ALARM RELAY LOCATION ON MASTER PCB The Nucleus Electrical Control Board has one Alarm Relay Circuit. See Master PCB location above. The alarm relay is rated for the following: 30 Volts DC, 2A Max, 60W, NO Only, SELV, LPS or Class 2 The alarm relay is only activated based on input from the primary RTD temperature probe on the mixed water outlet (T3). The alarm has a preset default MIN (65°F) and MAX (130°F) in the commissioning menu, and it will activate on measured temperature values of T3 above or below these MIN / MAX values. The above values are user adjustable and programmable in the commissioning menu. See COMMISSIONING section in this manual, starting on page 13. Once alarm has been triggered, the error must be manually cleared from the LCD screen by pressing ENTER. If alarm condition is still present, the TTML (page 15) begins and alarm is re‐ triggered after TTML has elapsed. This process can continue until outlet temperature is within the MIN / MAX parameters. The alarm will be de‐activated as soon as the measured temperature value at T3 returns to a measured value between MIN and MAX. When in a non‐alarm state, the relay is in a Normally Closed (NC) position. When the alarm is triggered, the relay switches to a Normally Opened (NO) position. MASTER PCB DETAILS The Primary PCB for this device comes with the following connectivity: Linear motor connection for valve motion. Four standard temperature input channels – T1, T2, T3, T4 – all are 3‐wire RTD connection types.
- Page 28 BOARD WIRING DIAGRAMS WIRING KEY MOTOR WIRING PRESSURE RTD TEMPERATURE FLOW FROM MOTOR TO FROM BOARD TO SENSOR PROBE METER CONNECTOR CONNECTOR M-1 = RED M-1 = RED P#-1 = RED = +5V T#-1 = WHITE = NEG M-2 = RED / WHITE M-2 = WHITE F#-1 = BLACK = SIG P#-2 = BLUE = SIG...
- Page 29 SENSOR TROUBLESHOOTING AND REPLACEMENT When a sensor is disconnected or no longer in proper working condition, an error message is displayed on the controller (see complete error list starting on page 24). If this sensor is on the master printed circuit board (PCB) then the error will be accompanied by a flashing red LED light on the overlay. TURN OFF POWER TO THE NUCLEUS CONTROL BOX BEFORE TROUBLESHOOTING OR REPLACING ANY WIRES AND SENSORS. USE ELECTROSTATIC DISCHARGE SAFE TOOLS WHEN WORKING INSIDE OF THE CONTROL BOX! 1. Determine if the sensor is truly broken and not a simple disconnection. Identify the appropriate sensor wires inside of the control box (see wiring diagram on page 28). Check the connection by pulling gently on the wire, best done with needle nose pliers. If the wire can be easily removed from the connector, reinstall and tighten connection with small flathead screwdriver. For pressure sensors ensure that the sensor and wire harness are properly connected as well. 2. If the sensor is properly connected to the controller and the condition persists, then the sensor needs to be replaced. Identify the appropriate sensor wires inside of the control box (see wiring diagram on page 28). Using an flathead screwdriver, loosen the connections between the board and wires. Remove the wires from the connectors. 3. Remove the disconnected wires from the control box. Begin by loosening the cable gland nut on the bottom of the box. Motor wires, T1, T2, T3, T4, P1, P2 wires run through the right‐side cable gland, while all other sensors run through the left‐side cable gland. Open the cable sleeve and fully remove the defective wires. 4. Shut down hot, cold and outlet ball valves and depressurize the pipes. Remove the defective sensor from the piping and install new sensor in its place. For RTD probes new compression fittings are required. Do not overtighten compression nuts before re‐ pressurizing valve (See Page 30). Replacement pressure sensors will also include a new harness. 5. Snake new sensor wires through the cable gland. Install replacements wires to their corresponding connectors on the PCB. Refer to wiring diagram on page 28 for the correct configuration. 6. Bundle any loose wires from the new sensor and place into the cable sleeve. Place end of the cable sleeve into the cable gland and tighten the gland nut to secure the sleeve in place. Take care to not put excess strain on the end of the sensor’s wires. 7. Open hot, cold and outlet ball valves to pressurize valve. Introduce power to the Nucleus control box and confirm that the replacement sensor is providing proper feedback and ...
- Page 30 INSTALLING AND REPLACING TEMPERATURE PROBES The RTD temperature probes used with Nucleus assemblies are simple to install. On the valve body the temperature probe is connected to the valve with a ¼” MNPT x ⅛”compression fi ng. The remaining temperature probes, if present, are installed into the pipe using a ½” MNPT x ⅛” compression fi ng. Teflon tape and a small amount of thread sealant should be used on the NPT side of the fittings. The ferrule, installed with the cone facing down, then sits on the top of the compression inlet. The compression nut is then put over the ferrule and tightened slightly, just enough to hold the ferrule in place. The RTD temperature probe is then inserted through the entire fitting until the end of the probe reaches approximately the center of the desired measured water stream. Finally, the compression nut is tightened by hand to “hand‐ ght” plus ⅛ to ¼ turn with an adjustable or open end wrench. Use cau on not to overtighten the fitting and only tighten until dripping stops. In some instances, it may be easier to loosely install the probe into the compression fitting and then installing the assembly a single piece. NOTE: if overtightened, leaks are probable and the entire RTD and compression fitting must be replaced! INSTALLATION OF COMPRESSION FITTING AND OUTLET RTD PROBE ON 2” NUCLEUS VALVE BODY ¼” NPT x Compression Fitting RTD Probe with Compression Nut Ferrule 10’ Lead Wire...
- Page 31 REQUIRED PIPING METHOD W NOTE: FOR MULTIPLE TEMPERED LOOPS, A BALANCING VALVE AND CHECK VALVE MUST BE INSTALLED ON EACH LOOP AFTER TEMPERED FIXTURES Leonard Nucleus Digital Mixing Valves are simple NOTE: Leonard Nucleus Digital Mixing Valves in design and may be easily cleaned, adjusted must be regularly maintained to provide best and repaired. If the installation is accessible, performance. Frequency of cleaning depends on servicing completed without quality of local water conditions and usage. See disconnecting the valves. Maintenance Guide and Record MGR‐1000 TROUBLESHOOTING INSTRUCTIONS Note: Provide serial number when ordering parts for each valve!
- Page 32 NV150 / NV200 NV300 KIT TYPE INCLUDES KIT R/NV KIT R/NV3 COMPLETE REPAIR 1 - 8 KIT 1/NV KIT 1/NV3 O-RING 1 - 5 ITEM # DESCRIPTION QTY. NV150 / NV200 NV300 O-RING, COVER KIT 1/NV, KIT R/NV KIT 1/NV3, KIT R/NV3 O-RING, COVER KIT 1/NV, KIT R/NV KIT 1/NV3, KIT R/NV3...
- Page 33 NV‐150‐LF, 1‐1/4” CHECKS DESCRIPTION INCLUDES KIT 4/984 REBUILD KIT 11-15 ITEM # DESCRIPTION QTY. PART # / KIT # LOWER STEM & PACKING KIT 4/984 SCREEN KIT 4/984 SPRING,CHECK KIT 4/984 O-RING, COVER KIT 4/984 O'RING, UPPER STEM KIT 4/984 STEM, UPPER CHECK 1761 CHECK BONNET 1786...
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Page 34: Servicing Instructions
SERVICING INSTRUCTIONS WARNING: Before servicing Nucleus series valves, be sure to shut down inlet hot, cold and outlet water supplies and power down the Nucleus control box. Failure to do so could result in damage to the control box and could cause injury and/or death to the service technician 1. Disconnect Motor Connectors. 5. Turn the cover assembly on its side. While securing the hex‐coupling under the motor mounting plate, remove the nut, lock washer and shuttle from the control stem. 2. If the control box is mounted to the mixing valve, remove it along with the mounting bracket. Place in a safe location without putting tension on sensor wires. 6. Inspect the shuttle and clean any sediment or debris that has built up. Replace O‐ring if necessary. 3. Remove the aluminum guarding and cover screws from cover assembly. 7. Inspect and clean all surfaces of the cover. Replace cover O‐rings if necessary. 4. Remove complete cover assembly. Do not remove motor assembly at this time. 7A. If a new Teflon® gasket is required, remove the locking disk (special tool required) and then the damaged gasket. Press the replacement disk into the groove evenly. NOTE: For best results, remove motor assembly from cover by unthreading the 4 bolts on top of the assembly. - Page 35 8. Reassemble the cover assembly. Place in a safe Remove Sleeve Assembly from Body location. Disassemble Sleeve 9. Remove sleeve assembly from valve body and clean all surfaces. Replace O‐ring on bottom of part if 9B. Model NV‐300‐LF: Using 5/32” Allen key, remove the damaged or worn. If necessary, disassemble the 4 bolts at the bottom of the sleeve assembly. Remove the sleeve to install replacement Teflon® disk. sleeve assembly from valve body. Next, fully disassemble the sleeve by removing 4 bolts using a 5/16” Allen Key. Loosen Sleeve Locking Nut (Use fork side of tool on the upper notches 10. Reassemble the sleeve assembly and carefully install it back into valve body. Remove Sleeve Assembly Use flat side of tool on the lower notches 11. Reinstall the cover assembly and guarding. 9A. Models NV‐150‐LF and NV‐200‐LF: First loosen the 12. Reinstall bracket and Nucleus control box locking nut and then remove the sleeve assembly by 13. Reconnect Motor Connectors and power up the unthreading it from the base (special tool required). Nucleus control box...
- Page 36 MINIMUM PRESSURE DROP FLOW (GPM) (l/min) 0.70 0.97 1.4 3.4 BAR 0.25* 100 115 122 136 140 158 165 GPM 0.95* 189 273 326 379 435 462 515 530 598 625 l/min MINIMUM PRESSURE DROP FLOW (GPM) (l/min) 0.97 1.4 3.4 BAR 0.25* 115 130 147 165...
- Page 37 Leonard’s instructions, for a period of one year from the date of shipment. During this period, Leonard will at its option repair or replace any product, or part thereof, which shall be returned, freight prepaid, to the Leonard factory and determined by Leonard to be defective in materials or workmanship.
- Page 38 COMMISSIONED PARAMETERS RECORD KEEPER Use the table below to record all of the commissioned parameters from the Nucleus. These parameters can be referenced later using this form. PARAMETER VALUE 5V Motor Scale Min Temp Max Temp Err TTML Err TTL Aux2 Flow Temp 5 min Temp 5 max Temp 6 min Temp 6 max Temp 7 min Temp 7 max Temp 8 min Temp 8 max...
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