NELSEN WATER NRO ROC2 Manuale dell'operatore
Nelsen NRO ROC2
System Controller Documentation
2
Table of Contents
Description..................................................................................................................................................................................................................................................................................................................................... Page
Specifications, Table 1......................................................................................................................................................................................................................................................................................................1
Schematic, Figure 1..............................................................................................................................................................................................................................................................................................................2
Controller Overview, Figure 2...............................................................................................................................................................................................................................................................................3
Controller Detail: CPU-3..................................................................................................................................................................................................................................................................................................4
Controller Detail: TB-1.......................................................................................................................................................................................................................................................................................................5
Conductivity Probe Installation, Figure 5..........................................................................................................................................................................................................................................6
Installation Instructions...................................................................................................................................................................................................................................................................................................6
Controller Programming: Accessing Hidden Menus, Figure 6....................................................................................................................................................................7
System Start-up w/Permeate Flush..........................................................................................................................................................................................................................................................7
Controller Programming: Program Selections, Table 2.............................................................................................................................................................................................8
Controller Programming: Menu Navigation, Figure 7..................................................................................................................................................................................................9
Controller Programming: Parameters Explained, Appendix A...................................................................................................................................................... 10-11
Controller Fault Displays................................................................................................................................................................................................................................................................................ 11-12
Controller Programming: Programming Interface Overview...................................................................................................................................................................... 13
Warranty.............................................................................................................................................................................................................................................................................................................................................. 14
1
Table 1 - Specifications
Inputs
Tank level switches (2) Normally-Closed. Can be used with a single level switch.
Inlet pressure switch Normally-Open.
Pretreat lockout switch Normally-Open.
Controller Power 120/240 VAC, 60/50Hz (Range: 90-145 VAC at 120 VAC setting, 180-290
VAC at 240 VAC setting
Permeate Conductivity 0-1125 PPM, 0-2250 μs (standard sensor, CP-1, K=0.75)
0-1950 PPM, 0-3900 μs (optional sensor, CP-1H, K=1.3)
Feed Conductivity (opt) 0-2250 PPM, 0-4500 μs (standard sensor, CP-1, K=0.75)
0-3900 PPM, 0-7800 μs (optional sensor, CP-1H, K=1.3)
Output Relay Ratings
Feed Solenoid 10A Resistive, 5A (Inductive). Voltage is the same as motor/supply voltage.
Flush Solenoid 10A Resistive, 5A (Inductive). Voltage is the same as motor/supply voltage.
Motor 40A Resistive & 240 VAC, 1.0 HP/120V, 2.0 HP/240V.
Circuit Protection
Main Power Fuse (110V) F1 3AG 20 Amp LittleFuse 314.020(P) (For up to 1 HP motor)
F1 3AG 4 Amp LittleFuse 312.004(P) (Motor contactor coil)
Main Power Fuse (208/240V) F1 3AG 12 Amp LittleFuse 314.012(P) (For up to 2 HP)
Transformer Fuse F2 3AG 1/8 Amp LittleFuse 312.125(P)
Relay Fuse F3 3AG 2 Amp LittleFuse 312.002(P)
Other
Dimensions 6.5” tall, 6.5” wide, 4.5” deep. Nema 6P non-metallic.
Weight 2.3 lb. (Basic Configuration, not including optional wire harness, etc..)
Environment 0-50°C, 10-90%RH (non-condensing)
2
Figure 1 - Simplified Schematic
i
Figure 1. Simplified Schematic
3
Figure 2 - Controller Overview
Keypad
System ON/OFF,
Up Arrow
Down Arrow
Manual Run, Manual Flush
CPU BoardCPU Board
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.
4
Typical Configuration
Permeate
Conductivity Probe
Shield
White
Black
Permeate
Conductivity Probe
(Optional Feed
Conductivity Probe)
Shield
White
Black
Shield
White
Black
Shield
White
Black
Cable to
Terminal Board
Figure 3 - Controller Detail: CPU-3
Typical Configuration
G T C G T C
TDS Probe 2 TDS Probe 1
Conductivity
Programing Port
(used with optional programming interface) See Appendix B
for explanation of the programming interface
Main interface port.
Connects via ribbon
cable to Terminal Board.
Sel-1 and Sel-2
Jumpers. Special
purpose jumpers.
5
Pump/
Motor
120/240 VAC
Supply
Power
120/240 VAC
Flush
Valve
120/240
VAC
Inlet
Valve
120/240
VAC
Pressure
Switch
Pretreat
Switch
Tank Lo
Switch
Tank Hi
Switch
Inlet Power Switch
Motor Relay
(1.0HP 120VAC)
(2.0HP 240VAC)
Dry Contacts.
Do not apply external voltage
Alternate wiring for
single level switch.
Tank Lo Tank Hi
240 VAC
120 VAC
F2 Controller
Power Fuse
F3 Solenoid
Power Fuse
F1 Main
Power Fuse
Inlet Valve
Relay
Flush Valve
Relay
Switch LEDs
Illuminate when
switches close.
Feed and Flush
Solenoid LEDs
Illuminate when
the relay is
energized.
Pump LED
Illuminates when the
motor relay is energized
.
Transformer
Figure 4 - Controller Detail: Terminal Board, TB-1 (See Fig. 1 for schematic)
6
Figure 5 - Conductivity Probe Installation
1 Drill the enclosure as needed and install liquid-
tight fittings for the wiring.
NOTE: The Controller can be ordered
pre-drilled or with fittings installed, or with
fittings and wiring installed. Contact Nelsen
Corporation for details.
2 Mount the enclosure in the desired location on
the RO system.
3 Bring the wires from the peripheral devices
into the enclosure and connect them to the
appropriate terminals. (See Figure 1, Figure 3 and
Figure 4.)
4 Set the voltage selector switch on the Terminal
Board to the desired voltage (120VAC or 240VAC)
(See Figure 4.)
Controller Power Fuse Values
.5 HP .75 HP 1 HP 2 HP
120 VAC 12 A 20 A 20A N/A
240 VAC - - 6 A 12 A
7 Connect the conductivity cell to the terminals on
the CPU Board. (See Figure 3)
8 Provide power to the RO system.
9 Press the System On/Off switch to turn the
system ON.
10 Select the Program Mode (See Figure 6 and Table
2). The default is Program 1 which is a general
purpose setting. Use Program 2 if your system is
not equipped with a flush valve.
NOTE: The Program Settings can be
customized to suit the specific needs
of an OEM and pre-programmed at the
factory with your settings. Contact Nelsen
Corporation for details.
11 Make any other changes you want to the
settings. Press System On/Off to save your
changes.
12 The controller is now ready for service.
NOTE: If using a single point High Level RO
water shut off/liquid level control, you need
to install a Jumper wire on the Terminal strip
from E24 to E26. Connect the float switch
wires to terminals E23 and E26. Connection
E25 is empty...no wire connection.
5 Install the correct power fuse for your voltage/
motor HP. See the table below and Figure 4.
6 Install the conductivity cell in the permeate line.
(See Figure 5 for conductivity cell installation
instructions.)
Installation
Install the Conductivity Probe in the “Run”
of a Tee or equivalent location. Orient the
probe so that air can not become trapped in
the area near the probe.
FLOW
FLOW
Conductivity
Probe
7
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.
Manual
Run/Flush
RO Presets Program 1
to change setting
Manual=Edit Sys=Save
RO Presets Program 1
for other menus
Manual=Edit Sys=Save
VALUES
1, 2, 3, 4
Save- Return to RO Display
System
On/Off
System
On/Off
Manual
Run/Flush
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.
8
The controller has 4 separate, field-selectable sets of settings for configuring the RO. The factory default
settings are shown below. The settings are identical except for variations in the flush behavior.
• Program 1, High Pressure flush
• Program 2, No Flush
• Program 3, Permeate Flush, (low pressure, inlet valve closed)
• Program 4, Low Pressure, feed water flush
See the previous page for instructions on how to access the menu for selecting these programs.
See Appendix A for a detailed explanation of the Parameters and their affect on the RO’s operation.
Table 2 - Controller Programming: ROC-2 Program Selections
Parameter Value Program 1 Program 2 Program 3 Program 4
Tank Level Switch delay (actuation and de-actuation)
Seconds 2 2 2 2
Pressure Switch delay (actuation and de-actuation)
Seconds 3 3 3 3
Pretreat Switch delay (actuation and de-actuation) Seconds 2 2 2 2
Pump start delay Seconds 10 10 10 10
Inlet Solenoid stop 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 count faults
Minutes 10 10 10 10
Low pressure fault shutdown, reset after shutdown
Minutes 60 60 60 60
Low pressure fault alarm relay output (TB-2 ONLY) *
Off/On Off Off Off Off
Low pressure time-out fault Seconds 60 60 60 60
Flush Behavior Extra Maximum
Normal No Flush Flush Flush
Time from last flush before Flush on Shutdown Minutes 10 0 10 10
Minimum operation before Flush on Shutdown Minutes 30 0 30 1
Flush duration on Shutdown Seconds 60 0 120 300
Periodic Flush interval Minutes 0 0 0 0
Periodic Flush duration Seconds 0 0 0 0
Unit Idle Flush interval * Minutes 0 0 0 0
Unit Idle Flush duration * Seconds 0 0 0 0
Timed Manual Run Minutes 5 5 5 9
Timed Manual Flush Minutes 5 0 5 9
Conductivity Probe Sample Rate Seconds 2 2 2 2
Conductivity Shutdown * Minutes 0 0 0 0
* These features are disabled by default due to the potential for confusion on the part of end-users in the field.
They can be enabled when needed via the OEM PC programming interface which allows changes to all of
the values shown above.
Indice
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