Parallel SelfSensing Modulating Pump ControllerParallel SelfSensing 302-380 Modulating Pump Controller SUPERSEDES: New EFFECTIVE: November 15, 2016 Plant ID: 001-0000. ... use of pump

Table of Contents Connecting Controler .................................................................................................................................... 4

Wiring to the other SelfSensing pumps. ................................................................................................... 4

Button Discription ......................................................................................................................................... 2

Start-up/Initialization .................................................................................................................................... 2

System Display .............................................................................................................................................. 3

Pump Status and Settings ............................................................................................................................. 4

Setting ON/OFF ......................................................................................................................................... 4

Setting Minimum Speed ........................................................................................................................... 5

Setting Maximum Speed ........................................................................................................................... 5

Setting the address ................................................................................................................................... 6

System Settings ............................................................................................................................................. 6

Control Curves........................................................................................................................................... 6

Offline ................................................................................................................................................... 7

Constant Head ....................................................................................................................................... 7

Constant Flow ..................................................................................................................................... 10

Proportional Pressure ......................................................................................................................... 12

Variable Flow....................................................................................................................................... 16

Number of Pumps/Alternation/Switching Speed ....................................................................................... 20

Units ............................................................................................................................................................ 21

Controller Setup .......................................................................................................................................... 22

BACnet settings ....................................................................................................................................... 22

Modbus settings...................................................................................................................................... 23

System Resume ....................................................................................................................................... 25

Controller Info ......................................................................................................................................... 25

Advanced Settings ....................................................................................................................................... 26

PID Setting ............................................................................................................................................... 26

Minimum pump On/Off time .................................................................................................................. 27

Installation, Operation, and Maintenance Manual

302-380Parallel SelfSensing Modulating Pump Controller

SUPERSEDES: New EFFECTIVE: November 15, 2016Plant ID: 001-0000

Setpoint Delta ......................................................................................................................................... 27

Manual Alternation ................................................................................................................................. 28

Factory Reset .......................................................................................................................................... 29

Setting the Clock ......................................................................................................................................... 31

Alarms/Errors .............................................................................................................................................. 32

Run Control ................................................................................................................................................. 33

Startup/Installation Instructions and Checklist .......................................................................................... 33

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Connecting Controler If the controller is not already wired to the SelfSensing drives you will want to run communication wire between them. The wire location for the controller is shown below.

Wiring to the other SelfSensing pumps. Wire will need to be supplied by installer for this operation. For the SelfSensing pumps to operate in parallel they will need to be daisy chained together.

• All wiring is to be 20AWG copper, stranded twisted pair• Installer is to run shielded wire twisted pair for communication at positions (+)68 & (-)69• Installer will need to run wire from positions 12(24V DC) & 20(Common) so that if one

drive should be powered off then the MPC will stay active for the other drives stillpowered on.

• Illustration of wiring is displayed on the next page.

1. The location of the communication wire from Drive1 at positions (+)68 & (-)69.

2. The location to the 24VDC power to the controllerfrom drive 1 positions 12(24V DC) & 20(Common).

3. The location of the communication wire to theBuilding Management System (BACnet or Modbus).

4. The location on the controller for the Run/Stopcommand for all pumps will require a jumper at ID1& GRD.

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Drive 1

Connector 1

Position 12

Position 13

Position 18

Position 20

Connector 2

Position 61

Position 68

Position 69

Drive 2

Connector 1

Position 12

Position 13

Position 18

Position 20

Connector 2

Position 61

Position 68

Position 69

Drive 3

Connector 1

Position 12

Position 13

Position 18

Position 20

Connector 2

Position 61

Position 68

Position 69

Drive 4

Connector 1

Position 12

Position 13

Position 18

Position 20

Connector 2

Position 61

Position 68

Position 69

• Connector 1 provides four programmable digital inputs terminals, two additionaldigital terminals programmable as either input or output, a 24 V DC terminal supply voltage, and a common for optional customer supplied 24 V DC voltage

• Connector 2 terminals (+)68 and (-)69 are for an RS-485 serial communications connection

• Connector 3 provides two analog inputs, one analog output, 10 V DC supplyvoltage, and commons for the inputs and output

• Connector 4 is a USB port available for use with the MCT 10 Set-up Software

Button Discription

The escape button is set as a global escape. This will quit the current function and bring you back to the main screen from any of the menus.

Start-up/Initialization

Turn each pump to “Auto On” then connect power to the Multi-pump control. Upon start-up the system will go through an initialization procedure. See Startup/Installation procedure for instructions on setting up the control. The initialization procedure will include the following steps:

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1. Finding the drives connected via the Modbus communication channel. These drive must behave address 1-4 with no drive having the same address. The drive the control finds will beinitialized to “Online” if no drive is present it will be left blank. The third state “Offline” is fordrive that are connected but not to be used.

2. Setting each drive to the correct parameters for control.3. Starting each drive/pump to reach its maximum speed, this checks the drive for functionality.

If changes need to be made to system setting, for example maximum speed, then leave the Modbus connections unconnected. The system will start-up with no errors then changes can be made.

Pump number is set by address. With the default settings Pump 1 is at address 1, Pump 2 is at address 2. The lead pump will be the one with the lowest address.

When the initialization procedure is done the “Initializing” will change to “Offline”.

If during initialization or run time the ramp up and ramp down times of the drive are too slow or too fast this should be changed to the individual drives. This is done under 3-80 Jog Ramp Time. The control initializes this to 20.00 seconds. Changing this value may result in having an effect on the PID, proceed with caution.

System Display To Display the system variable scroll down to the selected system using the up/down buttons ,

line below pump 4, and press the enter button . The following screen will appear.

Each pump can have one of three different states:

1. Running – if pump is Online and running.2. Stopped – if pump is Online but not running.3. Blank – if no pump is present.

The Flow, Head and Power will be continuously updated from information read from the drives. The total flow is the sum of each pumps individual flow. The total head is the average head of all pumps running. The power is the sum of all the power being used.

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Pump Status and Settings Each pump will have an identical menu structure, one will be shown here for simplicity. Scroll down to

the desired pump using the up/down buttons then press enter , Pump 1 is selected in this example.

The Flow, Head and Power will be displayed for the pump selected. Press the enter button to access the settings menu.

There are 4 options, use the up and down buttons to scroll through the menu then press the

enter button to select the desired setting.

Setting ON/OFF The current status of each pump will be displayed at the top of each screen. In this example the pump is “Online”.

Use the Up/Down buttons to scroll to desired state, press enter to select . Press esc to quit and return to the main menu.

Caution: wait a minimum of 5 minutes between shutting off or adding a pumps.

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Setting Minimum Speed This is the minimum speed setting for each pump. The control will set the minimum speed of the system to which ever minimum speed has the highest value.

1. Use the Up/Down buttons to scroll to the desired speed.

2. Press the Program button to set. If no change is desired press the enter button .

3. Press the Enter button to exit.

The range of speed is 10Hz – 40Hz.

Caution: Check with Taco Comfort Solutions before setting minimum speed below 20Hz. Extended use of pump with a speed below 20Hz may cause damage to the pump.

Setting Maximum Speed This is the maximum speed setting for each pump. The control will set the Maximum speed of the system to whichever the maximum speed has the lowest value.

1. Use the Up/Down buttons to scroll to the desired speed.

2. Press the Program button to set. If no change is desired press the enter button .


The range of speed is 40Hz – 65Hz.

Caution: Check with Taco Comfort Solutions before setting maximum speed above 60Hz. Prolonged use of pump above 60Hz can cause damage to the pump.

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Setting the address This setting is for setting the Modbus address of Pump. This is only for addressing on the control side, the desired address needs to also be set at the pump, see the included pump manual for instructions.

1. Use the Up/Down buttons to scroll through the address 2. Press the Program button to set.


Address of 1-4 are selectable.

Caution: If the same address is assigned to two different pump will cause errors and the system will not function.

System Settings There are 5 different options in the System Setting menu. Use the Up/Down buttons to scroll

though the menu then use the Enter button to select. The Escape button will return to the Main screen.

Control Curves The control curves menu is where the user can modify all the parameters of each of the selectable system functions.

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Use the Up/Down Buttons to scroll to the desired function press the enter button to select the function. Press the Escape button anytime to get back to the main menu.

Offline The “Offline” mode will switch all of the pumps that are “Online” to “Offline”. This will stop the flow of water. The control will still be in communication with the pump via the Modbus communication bus.

Use the Up/Down Buttons to scroll to the Offline selection on the Control Curves Menu then

press the enter button .

Press the Enter button to accept and set the system to “Offline” or the escape button to quit and continue with current setting.

Constant Head The Constant Head system function will keep the pumps running at a user defined Head set point.

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To access the Constant Head submenu scroll Down the Control Curves menu using the up/down buttons

to “Constant Head” and press the enter button . The current set point is displayed on the second line and the menu options are below.

Setting Constant Head Setpoint

Scroll down to Modify Head Setpoint using the up/down buttons and press the enter button .

1. Use the Up/Down buttons to set the desired setting. 2. Press the Program button to set the value.

3. Press the Enter button to exit. The system will ask you to verify the setpoint.

Press the Enter button to accept the setting, press the Escape button to go back and modify.

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Setting Controller for Constant Head Function

To set the unit to start the Constant Head function scroll to Set Controller for Constant Head using the

up/down buttons and press the enter button .

The controller will verify it has been set for Constant Head.

Setting Constant Head minimum Lag pump off speed

The minimum speed at which the lag pump will be shut off can be adjusted. There is only two reasons this should be done.

1. If after the system switches the lag pump off the controller switches it back on after the minimum time, then switches it off again, going in a cycle. In this case the minimum switching speed can be lowered. This can also be due to the fact that the PID controller is too fast, adjust the PID first.

2. If it seems like the Lag pump is left on too long and perhaps energy savings could be had by switching it off soon. The limit can be raised but only in small increments to make sure there are no adverse effects.

Use the Up/Down buttons to select OFF switching Speed then press the Enter button .

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Use the Up/Down buttons to adjust the speed then the Program button to set then the Enter

button to exit.

Constant Flow The Constant Flow system function will keep the pumps running at a user defined Flow set point.

To access the Constant Flow submenu scroll Down the Control Curves menu to “Constant Flow” using

the up/down buttons and press enter . The current set point is displayed on the second line and the menu options are below.

Setting flow setpoint

To modify the Flow setpoint scroll down to “Flow Setpoint” using the up/down buttons then press

the Enter button .

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1. Use the Up/Down buttons to set the desired setting 2. Press the Program button to set the value.

3. Press the Enter button to exit. The system will ask you to verify the setpoint.

Press the Enter button to accept the setting, press the Escape button to go back and modify.

Setting Controller for Constant Flow function

To set the unit to start the Constant Flow function scroll to Set Controller for Constant Head using the

up/down buttons and press the enter button .

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The controller will verify it has been set for Constant Flow.

Setting Constant Flow minimum Lag pump off speed

The minimum speed at which the lag pump will be shut off can be adjusted. There is only two reasons this should be done.




1. Use the Up/Down buttons to adjust the speed. 2. Press the Program button to set.


Proportional Pressure The Proportional Pressure function will calculate the required system Head based to the Flow using a linear function.

To access the Proportional Pressure submenu scroll Down the Control Curves menu to “Proportional

Pressure” using the up/down buttons and press the Enter button .

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Setting Design Setpoint

Use the Up/Down buttons to scroll to Set Design Setpoint then press the Enter button.

The controller will display the current Head and Flow values for the design point. To set:

1. Use the Up/Down buttons to scroll to the desired Head value. 2. Press the Program button to set the desired Head point. At this point the Flow value will

become active.

3. Use the Up/Down buttons to scroll to the desired Flow value. 4. Press the Program button to set the desired Flow point. No the No Flow Head percentage

will be active

5. Use the Up/Down buttons to scroll to the No Flow Head Percentage (Percentage of Design Point Head).

6. Press the Program button to set the desired No Flow Head percentage. Now the Head variable will be active again.

7. Press the Enter button to exit the screen and verify.

Proportional pressure and Variable Flow use the same Design Setpoint.

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Press the Enter button to accept or the Escape button to return and modify the design setpoint.

Setting Single Pump Setpoint.

Use the Up/Down buttons to scroll to Single Pump Setpoint then press the Enter button.

The controller will display the current Head and Flow values for the single pump point. To set:


become active.


will be active




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Press the Enter button to accept or the Escape button to return and modify the single pump setpoint.

Setting Controller for Proportional Pressure Function

To set the unit to start the Proportional Pressure function scroll to Set Controller for Proportional

Pressure using the up/down buttons and press the Enter button .

The controller will verify it has been set for proportional pressure press the Enter button to get to the main menu.

Setting proportional pressure Lag pump hysteresis

This is an adjustment to the turn on/off hysteresis of Lag pumps during Proportional pressure operation. A value of 1 would be no hysteresis, range is .1 to 1. Proportional pressure and Variable Flow use the same Lag pump hysteresis. There is only two reasons this should be done.

1. If after the system switches the lag pump off the controller switches it back on after the minimum time, then switches it off again, going in a cycle. In this case the minimum switching

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speed can be lowered. This can also be due to the fact that the PID controller is too fast, adjust the PID first.


Use the Up/Down buttons to select OFF switching Speed then press the Enter button.

1. Use the Up/Down buttons to adjust the speed 2. Press the Program button to set


Variable Flow The Variable Flow function will calculate the required system Head based to the Flow using a quadratic function.

To access the Variable Flow submenu scroll Down the Control Curves menu to “Variable Flow” using the

up/down buttons and press the Enter button .

Setting Design Setpoint

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Use the Up/Down buttons to scroll to Set Design Setpoint then press the Enter button .

The controller will display the current Head and Flow values for the design point. To set:


become active.


will be active





Press the Enter button to accept or the Escape button to return and modify the design setpoint.

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Setting Single Pump Setpoint.

Use the Up/Down buttons to scroll to Single Pump Setpoint then press the Enter button.

The controller will display the current Head and Flow values for the single pump point. To set:


become active.


will be active




Proportional pressure and Variable Flow use the same Single Pump Setpoint.

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Press the Enter button to accept or the Escape button to return and modify the single pump setpoint.

Setting Controller for Variable Flow Function

To set the unit to start the Variable Flow function scroll to Set Controller for Variable Flow using the

up/down buttons and press the Enter button.

The controller will verify it has been set for proportional pressure.

Setting Variable Flow Lag pump hysteresis

This is an adjustment to the turn on/off hysteresis of Lag pumps during Variable Flow operation. A value of 1 would be no hysteresis, range is .1 to 1. Proportional pressure and Variable Flow use the same Lag pump hysteresis. There is only two reasons this should be done.




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1. Use the Up/Down buttons to adjust the speed 2. Press the Program button to set.


Number of Pumps/Alternation/Switching Speed Adjusting the Number of Pumps adjust the number of pumps that is allowed to run at one time. For example, there are three pumps connected and the number of pumps is set to two. There will be one lead pump and a one lag pump. However, during alternation the third pump will be cycled in.

The alternation time is also adjustable in this setting. The options are one day, two days, three days, one week, two weeks, three weeks and one month.

To access the number of pumps setting from the Settings menu use the Up/Down buttons to

scroll to the “Number of Pumps” selection the press the Enter button .

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To set the number of pumps and the alternation time:

1. Use the Up/Down buttons to scroll to the desired number of pumps. 2. Press the Program button to set the desired number of pumps. At this point the alternation

time will become active.

3. Use the Up/Down buttons to scroll to the desired alternation time. 4. Press the Program button to set the desired alternation time. Now the switching speed will

be active.

5. Use the Up/Down buttons to scroll to the desired switching speed. 6. Press the Program button to set the desired alternation time. Now the number of pumps

will be active again.


Units The units setting will set the units displayed by the controller. There are 2 options, US standard imperial and International System (SI). The following table shows the difference:

US Standard Imperial Units (Std.) International System (SI)(Int.) Flow Gallons per minute (GPM) Liters per Second (lps) Head Feet of Head (FT) Kilopascal (KPa) Power Horsepower (Hp) Kilowatts (KW) Speed Hertz (Hz) Hertz (Hz)

To access the units setting from the Settings menu use the Up/Down buttons to scroll to the

“Units” selection the press the Enter button .

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To change the setting:

1. Use the Up/Down buttons to scroll to the desired units system. 2. Press the Program button to set the desired units system.


Controller Setup In the controller setup the user can modify the Building Management System (BMS) communication protocol, set the system resume and see the controller info.

To access the Controller Setup from the Settings menu use the Up/Down buttons to select

“Controller Setup” then press the enter button .

BACnet settings In the BACnet settings the Address and Baud rate are both modifiable. Baud rates are 9600 bps, 19200 bps, 38400 bps, 57600 bps, 76800 bps, and 115200. Controllers will either have the BACnet protocol or Modbus protocol but not both.

To access the BACnet menu from the Controller Setup menu use the Up/Down buttons to scroll

to “BACnet Setup” then press the enter button .

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1. Use the Up/Down buttons to scroll to the desired Instance. 2. Press the Program button to set the desired Instance. At this point the baud rate will

become active.

3. Use the Up/Down buttons to scroll to the desired baud rate. 4. Press the Program button to set the desired baud rate. At this point the address will become

active.

5. Use the Up/Down buttons to scroll to the desired Address. 6. Press the Program button to set the desired Address. Now the address will be active again.

7. Press the Enter button to exit and verify.

Press the Enter button to accept or the Escape button to return and modify the address or the baud rate.

Modbus settings In the Modbus settings the Address and Baud rate are both modifiable. Baud rates are 9600 bps, 19200 bps, 38400 bps, 57600 bps, 76800 bps, and 115200. Controllers will either have the BACnet protocol or Modbus protocol but not both. This Modbus setup is for use with the building management system, the Modbus protocol to use with the drive is set and non-modifiable.

To access the Modbus menu from the Controller Setup menu use the Up/Down buttons to scroll to “Modbus Setup” then press the enter button.

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1. Use the Up/Down buttons to scroll to the desired address. 2. Press the Program button to set the desired address. At this point the baud rate will become

active.

3. Use the Up/Down buttons to scroll to the desired baud rate. 4. Press the Program button to set the desired baud rate. Now the address will be active again.

5. Press the Enter button to exit and verify.

Press the Enter button to accept or the Escape button to return and modify the address or the baud rate.

The rest of the Modbus protocol is as follows:

Data Length: 8 Stop bits: 1 Parity: Even

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System Resume The system resume function determines the function of the control after an event. These events include a power outage or after the stop relay is opened. The stop relay is a relay that is connected between ID1 and GND on J8. When shorted this will turn the system offline.

Is system resume is active then the controller will resume the function running before the event took place. If system resume is inactive then the controller will be offline after the event.

To access the System resume function from the Controller Setup menu use the Up/Down buttons to scroll to “System resume” then press the enter button.

1. Toggle between active and inactive by pressing the Up/Down buttons . 2. Press the Program button to set


Controller Info The controller information provides general information about the controller. There are no adjustable

settings in this menu. To access from the Controller Setup menu use the Up/Down buttons to

scroll to “Controller Info” then press the enter button .

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Advanced Settings The advanced settings menu contains setting intended for the installer. These setting should not have to be adjusted after the installation to the system is complete. Adjustment may be necessary if there is a change in the system after installation.

The Advanced Setting menu can be accessed from the Setting menu, using the Up/Down buttons scroll to “Advanced Settings” then press the Enter button.

PID Setting Changing the PID setting will either slow down or speed up the response of the controller to changes in the system.

Caution must be taken to make sure that it is not too fast as to cause oscillation, it is better to be to slow then work up to the optimal value slowly.

To access the PID setting use the Up/Down buttons to scroll to “PID setting” in the Advanced

Settings menu then press the Enter button .


1. Use the Up/Down buttons to scroll to the desired percentage.

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2. Press the Program button to set the desired percentage.


The range will be from .01% to 100%, with .01% being the slowest and 100% being the fastest.

Minimum pump On/Off time The minimum pump on/off time is the minimum amount of time that after a pump is switched on or off the controller will not do any further pump switching. However, pump speeds will still be adjusted based on demand. This time is for settling time for the system.

To access the minimum on/off time setting use the Up/Down buttons to scroll to “Min On/Off

Time” in the Advanced Settings menu then press the Enter button .


1. Use the Up/Down buttons to scroll to the desired time in seconds. 2. Press the Program button to set the desired time.


Setpoint Delta The setpoint delta setting allows the user to select how close to the setpoint the system needs to be. The Delta is a percentage of the actual setpoint. For example if the system is setup for constant flow with a setpoint delta of 1% and the setpoint is 500 GPM. The controller will try and hold the system to within +/- 5 GPM.

Caution should be used when making this small as noise in the system will cause the controller to speed up and slow down unnecessarily. A wider setpoint delta would have no decrease in performance to the system but allow the motors to run smoother.

Each system function will have its own delta.

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To access the setpoint delta setting use the Up/Down buttons to scroll to “Setpoint Delta” in the

Advanced Settings menu then press the Enter button .

Use the Up/Down buttons to scroll to the desired function then press the Enter button to select.


1. Use the Up/Down buttons to scroll to the desired percentage. 2. Press the Program button to set the desired percentage.


Manual Alternation The manual alternation function allows the user to test the alternation function.

To access the manual alternation setting use the Up/Down buttons to scroll to “Manual

Alternation” in the Advanced Settings menu then press the Enter button .

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Press the Enter button to have the system perform the alternation routine, press the escape button

to return to the main screen.

Factory Reset

To access the factory reset use the Up/Down buttons to scroll to “Factory Reset” in the Advanced

Settings menu then press the Enter button . The Factory reset will reset some of the settings to the original factory values. See below for settings that are reset and settings that are not reset.

The controller will ask you to input a password. Call Taco Technical Services to receive this password.

The procedure for entering the password is

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1. Scroll to the first number using the up/down buttons then press program . At this point the second number will become active.

2. Repeat this for all 4 number when finished inputting the values the first number will be active again.

3. Press the Enter Button .

The control will now ask the user to press the Enter button to start a reset. If a reset is not desired then press the Escape button .

Once the reset is complete the control will ask the user to re-enter the settings that are specific to the installation. See the below tables.

Settings that ARE reset

Setting Reset Value

PID percentage 1.0 % Constant Head Setpoint Delta 2.0 % Constant Flow Setpoint Delta 2.0 % Proportional Pressure/Variable Flow Setpoint Delta 2.0 % Constant Head minimum lag pump off speed 45.0 Hz Constant Flow minimum lag pump off speed 30.0 Hz Proportional Pressure/Variable Flow lag pump off percentage 70 % Design (system) zero flow head percentage 50 % Single pump zero flow head percentage 50 % Pump minimum on/off time 60 sec Lag pump turn on speed (switching speed) 60 Hz Pump1/Pump2/Pump3/Pump4 min speed 20 Hz Pump1/Pump2/Pump3/Pump4 max speed 60 Hz

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Settings that ARE NOT reset

Instructions: This table should be updated when new values are set and approved. Keep the Installed value in the table in case need for future reference. Make sure to write down units, example, Constant Flow setpoint should be in either GPM or LPS, see units section on page 22 for available units.

Setting Installed values Updated value Units

Number of Pumps N/A Switching Speed (speed of lead pump when a lag pump will turn on)

Hz

System resume function N/A Bacnet/Modbus baud rate N/A Bacnet Instance number N/A Bacnet/Modbus address N/A Constant flow setpoint Constant head setpoint Proportional Pressure/Variable Flow single pump head Proportional Pressure/Variable Flow single pump flow Proportional Pressure/Variable Flow design head Proportional Pressure/Variable Flow design flow Alternation Time

Setting the Clock To set the system clock start by pressing the Alarm and Enter buttons simultaneously for 5 seconds. The following menu will appear.

Use the Up/Down buttons to scroll to “SETTINGS” then press the Enter button .

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Use the Up/Down buttons to scroll to “CLOCK SETTINGS” then press the Enter button .

Press the Enter button to select “DATE/TIME”.


1. Use the Up/Down buttons to scroll through the number.

2. Press the Enter button to go to the next field.

3. When done change the “Update date/time?” to yes and press the Enter button .

Alarms/Errors There are two alarms that will require user intervention. The first is a Modbus alarm, this is usually do to a break in the Modbus connection. The second is a no flow condition from a pump that is running. For the Modbus alarm do a quick check of connectivity between the control and the Pump. If a quick fix can be made and the system is functional restore connectivity, the alarm will reset when connectivity is reestablished and the system will continue to function as normal. If not then follow the following steps, these steps are required for the no flow alarm:

1. Bring the pump “offline” (see page 5). 2. Change the number of pumps (see page 21).

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3. Fix the problem. 4. Bring the pump back “online”. 5. Change the number of pumps.

The system will then function as normal. If there are any difficulties call Taco Comfort Solutions Technical Services.

Run Control The user is able to control if the system is running or not by the state of a relay between Pins ID1 and GND on J8 and the state of the “system resume” function. If the Relay is closed the Unit will function in whatever mode the user select. As soon as this relay is opened the system will go “offline” shutting down all the pumps. The state of the control when the relay is closed again depends the selection of the system resume menu selection.

Startup/Installation Instructions and Checklist Instructions to start up a new system. If the system is already running and flow cannot be interrupted call Taco Comfort Solutions technical services for instructions.

__1. With the power off to the controller unplug the Modbus connection to the VFD’s __2. Power up the controller __3. Set Address VFD’s (1-4), make sure they match in the control. There can’t be a

duplicate, this will cause errors. __4. Set/Check the Flow/Pressure setting(s) for desired Curve. __5. Set Alternation Time. __6. Turn off power to the control then plug in the Modbus connection to the VFD’s. __7. Repower the control, the control should discover all the drives connected. __8. When the initialization is complete set the number of pumps. * __9. After the number of pumps is set start the control by selecting the function to run.

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__10. When the system is up and running normally fill out the installed values in the table on pages 32.

* The number of pumps should be set to the number of pumps that can be running at any one time. For example, if there are 3 pumps but only 2 should be running at any one time, the third is alternated in, then set the number of pumps to 2.

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Documents

Parallel SelfSensing Modulating Pump ControllerParallel SelfSensing 302-380 Modulating Pump Controller SUPERSEDES: New EFFECTIVE: November 15, 2016 Plant ID: 001-0000. ... use of pump