LMI Liquitron DC4500 Series User manual
Replaces same of Rev. C 7/97
1780.D 7/00
InstructionInstruction
InstructionInstruction
Instruction
ManualManual
ManualManual
Manual
Liquitron™ DC4500 Series
For file reference, please record the following data:
Model No:
Serial No:
Installation Date:
Installation Location:
When ordering replacement parts for your LMI Controller or accessory, please include
the complete Model Number and Serial Number of your unit.
sales@novatech-usa.com
www.novatech-usa.com
Tel: (866) 433-6682 Fax: (866) 433-6684
Tel: (281) 359-8538 Fax: (281) 359-0084
3
Contents
1.0 Introduction ........................................................................................................................... 4
2.0 Installation .............................................................................................................................. 6
2.1 Mounting the Controller Enclosure ........................................................................ 6
2.2 Enclosure Mounting Dimensions ........................................................................... 7
2.3 Electrical Wiring Information ................................................................................... 8
2.4 Terminal Strip Layout .............................................................................................. 9
3.0 Operating the Controller ...................................................................................................... 13
3.1 Menu Overview ..................................................................................................... 14
3.2 Conductivity .......................................................................................................... 15
3.3 Set Point ................................................................................................................ 16
3.4 ∆ Differential .......................................................................................................... 17
3.5 Low Alarm ............................................................................................................. 18
3.6 High Alarm ............................................................................................................ 19
3.7 Feed ...................................................................................................................... 20
3.8 Clock ..................................................................................................................... 21
3.9 View Biocide.......................................................................................................... 22
3.10 Add Biocide .......................................................................................................... 23
3.11 Biocide Lockout .................................................................................................... 24
3.12 Biocide Prebleed .................................................................................................. 25
3.13 Manual Outputs .................................................................................................... 26
3.14 Advanced Setup ................................................................................................... 27
3.15 Temperature ......................................................................................................... 28
3.16 H2O Meter ............................................................................................................. 29
4.0 Start-Up .............................................................................................................................. 30
4.1 Cooling Tower Installation .................................................................................... 30
4.2 Cooling Tower Start-Up ........................................................................................ 31
4.3 Bleed Sampling Option ........................................................................................ 34
5.0 Calibration ............................................................................................................................ 35
6.0 Maintenance ........................................................................................................................ 36
7.0 Troubleshooting................................................................................................................... 37
8.0 Factory Settings ................................................................................................................... 38
9.0 Product Specifications ......................................................................................................... 39
10.0 Product Exploded View .......................................................................................................40
11.0 Product Parts List ................................................................................................................ 41
4
1.0 Introduction
The DC4500 is a microprocessor-based conductivity controller. It is designed or use in a variety o water
treatment applications requiring precise control o totally dissolved solids and chemical eed. Among its many
uses, the DC4500 will control conductivity and chemical eed in cooling towers and closed loop systems.
LMI’s DC4500 Series o conductivity controllers allows the greatest programming lexibility or cooling tower
system applications. This is accomplished through the use o an extensive options menu that is easy to use.
BLEED or BLOWDOWN o system water by valve control can be based on several setpoint options:
• Conductivity setpoint
• Hysteresis delay (lower than setpoint) to avoid valve operation chattering
• Rising or Falling conductivity trip points
FEED o chemical (inhibitor) can be based on our (4) di erent methods and the pump control can be either
On/O or externally-triggered Variable Speed.
• FEED at the same time system BLEEDS (lockout timer limits maximum FEED time)
• FEED time calculated as a percentage o total BLEED time
• FEED based on a timed cycle (pump is on or a percentage o this timed cycle)
• FEED based on low meter input
DUAL BIOCIDE chemical addition may be accomplished by the use o two (2) individually programmable
relays or optocoupler outputs. These outputs provide control o two individual chemical addition pumps based
on the ollowing options:
• On/O or externally-triggered Variable Speed pump control or BOTH or two pump/TIMER operation
• 28-DAY programmable timer (1, 2, 3, or 4 week selectable cycle)
ALARM indicators and relay outputs are energized based on the ollowing conditions:
• HIGH conductivity set point is reached
• LOW conductivity se tpoint is reached
• NO FLOW condition exists ( low switch must be installed)
The display is a 16-character backlit LCD (liquid crystal display) which is visible in all light conditions.
A three-key position membrane is used to enter data and settings (see Figure 1).
The conductivity range is 0 - 20,000 µSiemens. The units can be either µSiemens or PPM/TDS (total disolved
solids).
5
All setpoints and parameter settings are retained permanently in a special nonvolatile computer chip memory,
preventing their loss due to a power outage. This nonvolatile memory chip allows the unit to be programmed
be ore installation. No battery powered backup is required.
Built in test circuits are provided to test each individual relay output wiring and to allow or quick ield
service isolation o aulty probe, circuit cards, pumps, or solenoids or ease o troubleshooting.
A display or temperature is also provided. The range is 32° F to 158° F [0° C to 68° C]. The display can be
either ahrenheit or centigrade. This reading also provides the basis or temperature compensation which is
per ormed in all modes.
ALARMALARM
ALARMALARM
ALARM indicator lights when
a warning condition occurs:
high alarm set point
low alarm set point
loss of flow
BACKLITBACKLIT
BACKLITBACKLIT
BACKLIT
LCDLCD
LCDLCD
LCD
DISPLAYDISPLAY
DISPLAYDISPLAY
DISPLAY
FLOWFLOW
FLOWFLOW
FLOW indicator lights when
there is a loss of system flow.
Operates only if flow switch is
installed
BLEEDBLEED
BLEEDBLEED
BLEED indicator
lights when the
BLEED OFF or
BLOWNDOWN
output is energized
FEEDFEED
FEEDFEED
FEED indicator
lights when feed
(inhibitor) output is
energized
TIMER 1TIMER 1
TIMER 1TIMER 1
TIMER 1 indicator
lights when timer 1
output is energized
TIMER 2TIMER 2
TIMER 2TIMER 2
TIMER 2 indicator
lights when timer 2
output is energized
PUSH BUTTON UP ANDPUSH BUTTON UP AND
PUSH BUTTON UP ANDPUSH BUTTON UP AND
PUSH BUTTON UP AND
DOWN ARROW KEYSDOWN ARROW KEYS
DOWN ARROW KEYSDOWN ARROW KEYS
DOWN ARROW KEYS allow
scrolling through menu and
selection or changing of set
point values
PUSH BUTTON ENTER KEYPUSH BUTTON ENTER KEY
PUSH BUTTON ENTER KEYPUSH BUTTON ENTER KEY
PUSH BUTTON ENTER KEY
provides for menu selection
and/or acceptance of selected
values
POWERPOWER
POWERPOWER
POWER indicator
lights when power
is supplied to unit
Figure 1Figure 1
Figure 1Figure 1
Figure 1
6
An analog data (or control) output is provided. This is a non-isolated 4 - 20 mA signal. The conductivity
reading that corresponds to minimum and maximum analog signals is ully adjustable. This signal can be used
to power chart recorders or other pumps and devices.
The controller operates in two (2) distinct modes, ‘SYSTEM RUN’ and ‘SYSTEM START-UP’ or 'PRO-
GRAMMING MODE'. The unit will be in the ‘SYSTEM RUN’ mode when it is irst turned on. The various
program screen menus are used to calibrate the unit, set the control and alarm points, set the inhibitor eed
operating parameters, program the biocide [two (2) chemical addition] pumps, and manually test the relays
and wiring connections.
In the ‘SYSTEM RUN’ mode the DC4500 monitors the conductivity and activates the appropriate control or
alarm relay as necessary based on the set points entered in the ‘SYSTEM START-UP’ mode.
The DC4500 is packaged in a NEMA 12X, lame-retardant, molded TPE enclosure. When ordered, 115 VAC
units come ully wired to include input power cord and relay output pigtails to allow or simple installation.
The unit can be hardwired through conduit to the lower junction box portion o the enclosure when required.
Hard wiring makes the unit suitable or NEMA 4X applications.
2.0 Installation
2.1 Mounting the Controller Enclosure
The DC4500 conductivity controller is supplied with integral wall-mounting langes. It should be mounted
with the display at eye level on a vibration ree sur ace. All accessible mounting holes should be utilized. The
maximum allowable temperature is 122° F [50° C]. This should be considered i installation is in a high-
temperature location. Once the DC4500 is wall mounted, the metering pumps may be located at any distance
rom the controller. The conductivity probe should be placed as close to the controller as possible, to a
maximum distance o 300 t [91 m]. Under 25 t [7.6 m] is recommended. Over 25 t [7.6 m], the cable may
need to be isolated or shielded rom background electrical noise.
7
Figure 2Figure 2
Figure 2Figure 2
Figure 2
Figure 3Figure 3
Figure 3Figure 3
Figure 3
2.2 Enclosure Mounting Dimensions
When using the prewired unit, the enclosure is con igured as NEMA 12X. I the unit is connected through
watertight conduit, the enclosure is con igured as NEMA 4X.
The ollowing clearances should be observed or proper mounting (see Figures 2 and 3).
8
2.3 Electrical Wiring Information
To reduce the risk of electrical shock, the controller must be plugged into a grounded outlet with ratings
conforming to the specifications on the data nameplate. It must be connected to a viable ground circuit. DO
NOT US ADAPT RS (see Figure 4)! All wiring must conform to required electrical codes.
The DC4500 conductivity controller is available in either 115 or 230 VAC 50/60 Hz. The 115 VAC version
is supplied with one (1) 6- oot grounded AC power cord and our (4) 12-inch output pigtails or plug-in connec-
tion o controlled devices.
A our-pin connector is provided or the conductivity probe and temperature compensation probe.
The DC4500 controller is provided with a voltage selector switch to allow the unit to be used with a 115 VAC
or 230 VAC power source. To change the voltage selection, disconnect the unit from the power source and
remove the front keypad panel. The selector switch is located on the circuit board attached to the back panel.
When switching voltages ensure that power cord and pigtails are appropriately changed.
Figure 4Figure 4
Figure 4Figure 4
Figure 4
9
2.4 Terminal Strip Layout
To access the wiring connections inside o the conductivity controller:
1. Disconnect the unit rom electrical power.
2. Remove the our (4) screws and the junction box cover on the lower hal o the unit.
3. Consult the speci ic instructions below or the connections required.
AC Power InputAC Power Input
AC Power InputAC Power Input
AC Power Input
Hot: TB2-1
Neutral: TB1-4
Ground: TB4-4
Bleed Blowdown Control Relay OutputBleed Blowdown Control Relay Output
Bleed Blowdown Control Relay OutputBleed Blowdown Control Relay Output
Bleed Blowdown Control Relay Output
Hot (N.O.): TB5-1
Hot (N.C.): TB5-2
Neutral: TB1-3
Ground: TB4-3
Feed OutputFeed Output
Feed OutputFeed Output
Feed Output
On/O
Hot: TB6-1
Neutral: TB1-2
Ground: TB4-2
External Trigger
High: TB9-3
Low: TB9-4
Alarm OutputAlarm Output
Alarm OutputAlarm Output
Alarm Output
Hot: TB6-2
Neutral: TB1-1
Ground: TB4-1
10
4 - 20 mAmp Output4 - 20 mAmp Output
4 - 20 mAmp Output4 - 20 mAmp Output
4 - 20 mAmp Output
( + ) TB9-1
( - ) TB9-2
Biocide #1 Pump OutputBiocide #1 Pump Output
Biocide #1 Pump OutputBiocide #1 Pump Output
Biocide #1 Pump Output
On/O
Hot: TB6-3
Neutral:TB2-4
Ground: TB3-4
External Trigger
High: TB8-1
Low: TB8-2
Biocide #2 Pump OutputBiocide #2 Pump Output
Biocide #2 Pump OutputBiocide #2 Pump Output
Biocide #2 Pump Output
On/O
Hot: TB6-4
Neutral:TB2-3
Ground: TB3-3
External Trigger
High: TB8-3
Low: TB8-4
Flowmeter InputFlowmeter Input
Flowmeter InputFlowmeter Input
Flowmeter Input
The inputs are reversible when the lowmeter connection is a relay and has no
polarity
TB10-1
TB10-2
Flow Switc InputFlow Switc Input
Flow Switc InputFlow Switc Input
Flow Switc Input
This input can be used to connect a low switch or other device providing a switch
closure output. I a device such as this is connected to the DC4500, it will serve
to disable the controller outputs when this switch is in the “OPEN” position.
This unction can be used as a sa ety override to prevent controller/pump
operation during loss o low.
The inputs are reversible since the low switch connection has no polarity.
TB10-3
TB10-4
11
T ermistor Probe Output (Hardwire Only)T ermistor Probe Output (Hardwire Only)
T ermistor Probe Output (Hardwire Only)T ermistor Probe Output (Hardwire Only)
T ermistor Probe Output (Hardwire Only)
Run the thermistor probe wiring through the PG9 connector on the right side o
the DC4500 controller junction box keeping the wires away rom any
115/230 VAC cables that may cause electrical inter erence.
Signal Output: TB11-1
Signal Return: TB11-2
Conductivity Probe (Hardwire Only)Conductivity Probe (Hardwire Only)
Conductivity Probe (Hardwire Only)Conductivity Probe (Hardwire Only)
Conductivity Probe (Hardwire Only)
Run the conductivity probe wiring through the PG9 connector on the right side o
the DC4500 controller junction box keeping the wires away rom any 115/230 VAC cables that
may cause electrical inter erence.
Signal Output: TB11-3
Signal Return: TB11-4
Table of contents
Other LMI Controllers manuals
Popular Controllers manuals by other brands
Digiplex
Digiplex DGP-848 Programming guide
YASKAWA
YASKAWA SGM series user manual
Sinope
Sinope Calypso RM3500ZB installation guide
Isimet
Isimet DLA Series Style 2 Installation, Operations, Start-up and Maintenance Instructions
LSIS
LSIS sv-ip5a user manual
Rockwell Automation
Rockwell Automation 1769-L31 installation instructions
