Leonard NUCLEUS VALVE NV-200-LF Guida

HOT INLET COLD INLET

MIXED OUTLET

Bulletin NUC-1

March 2022

1360 Elmwood Avenue, Cranston, RI 02910 USA

Phone: 401.461.1200 Fax: 401.941.5310

Email: [email protected]m

Web Site: http://www.leonardvalve.com

INSTALLATION ADJUSTMENT SERVICE

NUCLEUS VALVE

IMPORTANT! Provide serial number when ordering parts!!

INSTALLATION

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.

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.

Model NV-150-LF – 1¼” Inlets, 1½” Outlet

Model NV-200-LF – 2” Inlets and Outlet

Model NV-300-LF – 3” Inlets and Outlet

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)

INSTALLATIONAND FIELD ADJUSTMENTS ARE THE

RESPONSIBILITYOF INSTALLER. READ ALL

INSTRUCTIONS PRIOR TO INSTALLATION

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

SETUP INSTRUCTIONS

110V POWER

SUPPLY

GREEN WIRE

EARTH GROUND

CONNECTOR

MIXED OUTLET

ISOLATION VALVE

ETHERNET

CONNECTION

MIXED OUTLET

TEMPERATURE

PROBE

NUCLEUS VALVE

CONTROL PANEL

COLD INLET

CHECK VALVE

MOTOR WIRING

CONNECTOR

NUCLEUS VALVE

MOTOR & BODY

HOT INLET

CHECK 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. Installer must follow detailed instructions below to ensure

proper operation of valve.

RELAY RATING: 30 V DC, SELV, LPS, or Class 2, 2 Amp MAX, 60W, NO Only

Valve assembly is suitable for indoor use only

Valve outlet must face down and be piped to Method W, see page 31

•NOTE! READ ALL INSTRUCTIONS PRIOR TO INSTALLATION

INSTALLATION INSTRUCTIONS

1. The Nucleus Unit MUST be piped according to a Leonard Required Piping Method W (see

page 31).

2. Mount valve body outlet facing down 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

SET POINT: XXXF

12. Press ENTER to adjust SET POINT temperature. Use ▲▼ buttons to adjust SET POINT

temperature to required outlet temperature. The Nucleus Valve will automatically adjust to

new SET POINT, though this does not mean the unit is fully commissioned.

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

full travel, end-to-end of hot and cold ports of the valve body. This process assigns a

numerical value to the distance travelled by the motor, in steps, that will be used in future

comparisons to indicate if there is a potential maintenance problem or internal mechanical

issue with the components of the valve.

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

Nucleus is so equipped with the optional inlet temperature sensors.

Note: A large negative value displayed at the Hot 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. 5

Menu Screen2: 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 temperaturesensors.

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 Screen3: 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

optional Return Temperature RTD, value as measured on (T4).

Note: A large negative value displayed at the Rtrn 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 4: Inlet Hot Water Pressure

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 supplypressure (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 ▼6 times displays Daughter Brd: N or Y

This screen indicates whether or not the control box is equipped with a Daughter Board,

which is an add-on optional circuit board for the following additional equipment and

capabilities:

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)

Note: If ‘N’ is showing for Daughter board, there will be no additional support screens

associated with Sensors T5, T6, T7, T8 and F1, F2 and/or P3.

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.

Menu Screen9: 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 anddisplays actual temperature as measured on RTD (T8) if the Nucleus is so equipped

with the optional temperaturesensors.

Note: A large negative value displayed at the Temp 8 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.

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 Screen8: Optional Temperature Probe 6 (T6)

Menu Screen12:

Additional Optional Flow Sensor (F2) OR OptionalPressure 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

setup in the commissioning menu. See Commissioning Menu.

If this channel is configured to accept a pressure input instead, the Menu Screen will look as follows:

This is an indication of the actual measured value of pressure (PSI) on pressure sensor 3 (P3) if the

Nucleus is so equipped with the optional Pressure Sensor (P3).

Note: A large negative value displayed at the Flow 2 or Psi 3 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.

Pressing ▼11 times displays Flow 1: XXX

This indicates anddisplays 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 Screen11: Optional Flow Sensor (F1)

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