NELSEN WATER NRO ROC2HE-UL Manual de usuario
Nelsen NRO ROC2HE-UL
System Controller Documentation
Systems w/CPU-4 Control Board
Manufactured after March 2020
Since 1954
1
Table of Contents
Contents.........................................................................................................................................................................................................................................................................................................................Page #
Specifications, Table 1......................................................................................................................................................................................................................................................................................................2
Schematic, Figure 1..............................................................................................................................................................................................................................................................................................................3
Controller Overview, Figure 2...............................................................................................................................................................................................................................................................................4
Controller Detail: CPU-4..................................................................................................................................................................................................................................................................................................5
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 Programming: Program Selections, Table 2.............................................................................................................................................................................................9
Controller Programming: Menu Navigation, Figure 7............................................................................................................................................................................................. 10
Controller Fault Displays................................................................................................................................................................................................................................................................................ 11-12
Warranty.............................................................................................................................................................................................................................................................................................................................................. 13
2
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.
The Tank, Low Pressure and Pretreat inputs are 50% duty cycle square wave,
10VDC peak @ 10mA max.
The switch inputs are dry contacts only. Applying voltage to these terminals
will damage the controller.
Controller Power 110-120/208-240 VAC, 60/50Hz (Range: 110-240 VAC)
Permeate Conductivity 0-3000 PPM, 0-6000 μs (standard sensor, CP-1, K=.75)
Feed Conductivity (opt) 0-3000 PPM, 0-6000 μs (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/110-120V, 2.0 HP/208-240V.
Circuit Protection
Relay Fuse F1 5x20mm - 2 Amp - BelFuse 5ST 2-R
Note: The fuses shown above are for supplemental protection only. Branch
circuit protection and disconnect means must be provided externally.
See Field Wiring Diagram for Branch Circuit protection requirements.
Other
Dimensions 7" tall, 7" wide, 4" deep. Nema 4X Polycarbonate Hinged Enclosure.
Weight 2.6 lb. (Basic Configuration, not including optional wire harness, etc.)
Environment 0-50°C, 10-90%RH (non-condensing)
Note: After our modifications the enclosure rating is Nema 1.
3
Figure 1 - Simplified Schematic
4
Figure 2 - Controller Overview
Terminal Board (TB-1 Re-E)CPU Board (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.
Keypad
System ON/OFF,
Up Arrow
Down Arrow
Manual Run,
Manual Flush
5
Typical Configuration
Permeate Conductivity Probe
Shield
White
Black
Cable to
Terminal Board
Figure 3 - Controller Detail: CPU-4
Typical Configuration
6
Figure 4 - Controller Detail: Terminal Board, TB-1 (See Fig. 1 for schematic)
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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 Install the conductivity cell in the permeate line.
(See Figure 5 for conductivity cell installation
instructions.)
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 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 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: YOU MUST REMOVE THE JUMPER
WIRE FROM E23 TO E24 if using a single
point High Level RO water shut off float
switch control and connect the float switch
wires to terminals E23 and E24 (See Fig. 4).
If you are using a piggyback float plug leave
the jumper wire in place.
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
8
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.
Tabla de contenidos
