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  Figure 6 - Controller Programming:  

Accessing the Hidden Menus

  System Start-up w/

Permeate Flush

1   With the System ON, 

Press and  

Hold

 the 

Up

 and 

Down

 Arrows.

2   With  the 

Up

 and 

Down

 Arrows 

depressed, 

Press

 the 

System On/Off

 

button. The menu will switch to the  

RO Presets menu shown in Figure 7.

For systems equipped with a Permeate Flush, you must follow the procedure below for proper system start-

up. When there is no Permeate Water in the tank the RO will not start.
1.  With the system on, 

Press and Hold

 the 

Up

 and 

Down

 Arrows

2.   With  the 

Up

 and 

Down

 Arrows depressed, 

Press

 the 

System On/Off

 button. This will switch to the  

Hidden Menus as shown above.

3.  If not already on the RO Presets Program, 

Press

 the 

Up

 or 

Down

 Arrows until you reach this screen.

4.  Once on the RO Presets Program Screen, 

Press

 

Manual

 to Edit this Screen.

5.  Press the 

Up

 or 

Down

 Arrow to change to 

Program 2

6.  Once on Program 2, 

Press

 

Manual

 to Exit the screen.

7. 

Press

 

System On/Off

 to save the changes and return to the Home Page.

Once your Permeate Tank has filled enough to do a proper permeate flush, follow the steps again 

changing from Program 2 back to Program 3. 

Summary of Contents for NRO ROC2HE-UL

Page 1: ...Nelsen NRO ROC2HE UL System Controller Documentation Systems w CPU 4 Control Board Manufactured after March 2020 Since 1954...

Page 2: ......

Page 3: ...Controller Detail TB 1 6 Conductivity Probe Installation Figure 5 7 Installation Instructions 7 Controller Programming Accessing Hidden Menus Figure 6 8 System Start up w Permeate Flush 8 Controller...

Page 4: ...0 6000 s standard sensor CP 1 K 75 Output Circuit Ratings Feed Solenoid 1A Voltage is the same as motor supply voltage Flush Solenoid 1A Voltage is the same as motor supply voltage Motor 1 0 HP 110 12...

Page 5: ...3 Figure 1 Simplified Schematic...

Page 6: ...ard CPU 4 Conductivity Probe Connections Display 4 line 20 character Clear concise feedback on the RO s status Alarm Display backlight flashes along with audible beeper to indicate alarm condition Key...

Page 7: ...5 Typical Configuration Permeate Conductivity Probe Shield White Black Cable to Terminal Board Figure 3 Controller Detail CPU 4 Typical Configuration...

Page 8: ...6 Figure 4 Controller Detail Terminal Board TB 1 See Fig 1 for schematic...

Page 9: ...the System On Off switch to turn the system ON 10 Program Mode 2 is default See Table 2 which is a general purpose setting without a flush valve NOTE The Program Settings can be customized to suit the...

Page 10: ...ith the system on Press and Hold the Up and Down Arrows 2 With the Up and Down Arrows depressed Press the System On Off button This will switch to the Hidden Menus as shown above 3 If not already on t...

Page 11: ...op delay Seconds 1 1 1 1 Pump start retry interval restart delay after LP fault Seconds 60 60 60 60 Low pressure fault shutdown of faults Faults 5 5 5 5 Low pressure fault shutdown time period to coun...

Page 12: ...10 Figure 7 Controller Programming Menu Navigation...

Page 13: ...d xxx uS Line 3 Alarm SP xxx ppm or Alarm SP xxx uS Line 4 To Reset Push OFF ON Feed Conductivity Fault Feed conductivity is higher than the alarm set point Line 1 Service Fault Line 2 Feed TDS xxx pp...

Page 14: ...th a multi meter for correct on off operation Replace switch or level control if faulty 3 If someone connected 110v to the terminal strip connection for the high level shut off they could have fried t...

Page 15: ...facturer s warranties on the Product or any parts therein subject to the conditions and exclusions in the manufacturer s warranty Buyer s exclusive remedy under such third party manufacturer s warrant...

Page 16: ...ATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE NO REPRESENTATIONS OR WARRANTIES AT ANY TIME MADE BY ANY EMPLOYEE AGENT OR REPRESENTATIVE OF NELSEN SHALL BE EFFECT...

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