LMI LIQUITRON 7000 Series User manual

Instruction Manual
1
LIQUITRON™
Series 7000 Multi
-Dimensional Controller
Installation & Operation Manual
Manual No.: 56424
Revision
: 00
Rev. Date: 10/2018

Section 1.0 -Precautions
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Instruction Manual
Table of Contents
1.0 Precautions.......................................................................................4
2.0 Introduction ......................................................................................5
2.1 Specifications..................................................................................................5
2.2 Unpacking Check List .....................................................................................7
3.0 Installation ........................................................................................8
3.1 Location and Installation .................................................................................8
3.2 Controller Mounting.........................................................................................9
3.3 LMI Connect Antenna ...................................................................................10
3.4 Inline Probe Installation.................................................................................10
3.5 LMI Mounting Panel (Optional)......................................................................12
3.6 Batch Tank / Submersed Probe Installation..................................................12
3.7 Cooling Tower Installation.............................................................................13
3.8 Boiler Installation...........................................................................................14
3.9 pH/ORP Inline Installation.............................................................................16
3.10 Wiring............................................................................................................17
3.10.1 Power Input...........................................................................................18
3.10.2 On/Off Pump Output .............................................................................19
3.10.3 Proportional Pump Output.....................................................................19
3.10.4 External Alarm Relay Power Output......................................................20
3.10.5 Blowdown Valve Power Output.............................................................21
3.10.6 Probe Input............................................................................................22
3.10.7 Flow Switch Input..................................................................................22
3.10.8 Low Tank Input......................................................................................24
3.10.9 Flow Meter Input ...................................................................................25
3.10.10 Analog 4-20 mA Output....................................................................26
4.0 Operation ........................................................................................27
4.1 Dashboard.....................................................................................................27
4.2 Manual Mode ................................................................................................28
4.3 Sensor Details...............................................................................................28
4.4 Alarm Log......................................................................................................29
4.5 Software Configuration..................................................................................30
4.5.1 Conductivity Measurement....................................................................31
4.5.2 Inhibitor Feed........................................................................................32
4.5.3 Biocide Control......................................................................................32
4.5.4 Biocide Lockout.....................................................................................34
4.5.5 Biocide Pre-bleed..................................................................................34

Section 1.0 -Precautions
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4.5.6 pH Measurement...................................................................................34
4.5.7 ORP Measurement ...............................................................................34
4.5.8 Application Summary Screen................................................................35
4.5.9 Security Settings...................................................................................35
4.5.10LMI Connect..........................................................................................36
4.6 Settings Menu...............................................................................................36
4.6.1 View Application Summary....................................................................36
4.6.2 Application Settings...............................................................................37
4.6.3 System Settings....................................................................................37
4.6.4 Advanced Settings................................................................................38
4.7 Probe Calibration ..........................................................................................39
4.7.1 pH Calibration .......................................................................................39
4.7.2 ORP Calibration....................................................................................40
4.7.3 Conductivity Calibration ........................................................................40
5.0 Spare Parts Replacement and Routine Maintenance...................41
5.1 pH Probe Maintenance .................................................................................41
5.2 ORP Probe Maintenance ..............................................................................42
5.3 Conductivity Probe Maintenance...................................................................42
5.4 Controller Assembly Parts List......................................................................42
6.0 Troubleshooting.............................................................................45
Table of Figures
Figure 1: Controller Dimensions......................................................................................9
Figure 2: Controller Mounting Diagram .........................................................................10
Figure 3: LMI Flow Cell .................................................................................................11
Figure 4: LMI Mounting Panel.......................................................................................12
Figure 5: Submersed Probe Installation........................................................................13
Figure 6: Cooling Tower Installation..............................................................................14
Figure 7: Continuous Sampling Boiler Installation.........................................................15
Figure 8: Timed Sample Boiler Installation....................................................................16
Figure 9: pH/ORP Inline Installation..............................................................................17
Figure 10: Complete Wiring Terminal Diagram.............................................................18
Figure 11: Power Input Wiring Diagram ........................................................................18
Figure 12: Pump Power Output Wiring Diagram...........................................................19
Figure 13: Proportional Pump Wiring Diagram..............................................................20
Figure 14: External Alarm Relay Wiring Diagram..........................................................20
Figure 15: Motorized Blowdown Valve Wiring Diagram.................................................21
Figure 16: Solenoid Blowdown Valve Wiring Diagram ..................................................21
Figure 17: Probe Wiring Diagram..................................................................................22
Figure 18: Flow Switch Wiring Diagram ........................................................................23

Section 1.0 -Precautions
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Instruction Manual
Figure 19: Methods of Externally Triggering Digital Inputs............................................24
Figure 20: Low Tank Input Wiring Diagram...................................................................25
Figure 21: Flow Meter Wiring Diagram..........................................................................25
Figure 22: Analog Output Wiring Diagram.....................................................................26
Figure 23: System Dashboard.......................................................................................27
Figure 24: Manual Mode ...............................................................................................28
Figure 25: Sensor Details..............................................................................................29
Figure 26: Alarm Log.....................................................................................................30
Figure 27: Setup Type...................................................................................................31
Figure 28: Application Selection....................................................................................31
Figure 29: Biocide Schedule Summary.........................................................................33
Figure 30: Application Summary Screen.......................................................................35
Figure 31: Controller Assembly.....................................................................................43
1.0 Precautions
The following precautions should be taken when working with LMI®Liquitron™
Controllers. Please read this section carefully prior to installation.
Electrical Connections
WARNING: To reduce the risk of electrical shock, the controller must be plugged into a
properly grounded grounding-type receptacle with ratings conforming to the data on the
product label. The controller must be connected to a good ground. DO NOT USE
ADAPTERS!All wiring must conform to local electrical codes. If the supply cord is
damaged, it must be replaced by the manufacturer, stocking distributor, or authorized
repair center in order to avoid a hazard.
Ground Fault Circuit Interrupter
WARNING: To reduce the risk of electric shock, install only on a circuit protected by a
Ground Fault Circuit Interrupter (GFCI).
Disconnect Power to Service
WARNING: Disconnect power prior to removing the black lid to access the wiring
terminals.
Sensor Calibration
Always calibrate sensors to ensure accurate readings.
Cable Glands
Always use the smallest possible hole to route cable through the gland. Ensure gland is
fully tightened to prevent water ingression.

Section 2.0 -Introduction
Instruction Manual
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2.0 Introduction
The LIQUITRON™ 7000 Series Controller is designed for use in a variety of water
treatment applications requiring precise control of total dissolved solids and chemical feed.
Among its many uses, the 7000 Series Controller will control conductivity and chemical
feed in cooling towers, boilers, waste water, and other closed loop systems.
The 7000 Series Controller simplifies installation and setup using a large, color
touchscreen and intuitive initial setup wizard.
The 7000 Series Controller will control four (4) pumps: Biocide 1, Biocide 2, Inhibitor, Acid,
Base, Oxidizer, or Reducer. Two (2) of these pumps can be proportionally controlled with
pulse outputs. It also controls an external alarm relay and a solenoid or motorized ball
valve for blowdown. It monitors four (4) low tank sensors, two (2) flow meters, one (1) flow
switch, and three (3) probes: Conductivity, pH, and ORP. There are two (2) 4-20mA
outputs for data logging.
2.1 Specifications
Table 1: General Specifications
Enclosure Ingress protection
IP65 / NEMA 3R
Voltage / Frequency
115/230 VAC, 50/60 Hz
Max. Current / Wattage
4 A
Operation environment
Indoor / Outdoor
Operating ambient temperature
-10°C to +50°C (14F to 122F)
Storage temperature
-40°C to +70°C (-40F to 160F)
Standard Probes and Manifold
Process Fluid Temperature
0°C to +80°C (32F to 176F)
Boiler Probes and Manifold
Process Fluid Temperature
0°C to +204°C (32F to 400F)
Standard Probes and Manifold
Process Fluid Pressure
100 PSI (6.9 Bar)
Boiler Probes and Manifold
Process Fluid Pressure
250 PSI (17.3 Bar)
Operating humidity range:
0-95% RH (Non-condensing)
Operating Altitude
<2,000 meters
Display
UV Resistant 7” Capacitive
Touchscreen with 800 x 480 resolution
Dimensions
8.8” x 11.8” x (224mm x 300mm

Section 2.0 -Introduction
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Table 2: Inputs
Type Quantity Specification
Conductivity 1
Cell Constant: 1.0 or 1.5
Range: 0 – 20,000 µS or 0 – 12,820 ppm
Resolution: 10 uS
Temperature 1
10 KOhm Thermistor
Range: 0 – 100 Degrees C
Resolution: 1 Degree C
pH 1
Range: 0 – 14 pH
Resolution: 0.01 pH
ORP 1
Range: -2,000 mV - +2,000 mV
Resolution: 1 mV
Flow Switch Input 1
Optically isolated providing 24 V power with a
nominal 4 mA when closed
Dry Contact Reed or Transistor
See Figure 19
56568 Flow Switch 1
SIKA VK320M0P1CPP3K with 3/4” Tee
Increasing Minimum Flow: 2.2 GPM
Decreasing Minimum Flow: 2.0 GPM
Maximum Flow Rate: 25 GPM
Low Tank 4
Optically isolated providing 24 V power with a
nominal 4 mA when closed
Dry Contact Reed or Transistor
See Figure 19
Flow Meter 2
Optically isolated providing 24 V power with a
nominal 4 mA when closed
Dry Contact Reed or Transistor
24 V Power for Hall Effect Sensor (max 100 mA)
Max Rate: 500 Hz
Pulse Width: Configurable 1-99 msec
Table 3: Outputs
Type Quantity Specification
SPST Powered
Mechanical Relay 5
Normally Open Relay for powering 4 pumps and 1
external alarm (4A max combined on all relays)
Switching Line Voltage
SPDT Powered
Mechanical Relay 1
Normally Open and Closed Relay for powering
solenoid or motorized ball valve (4A max combined
on all relays)
Switching Line Voltage
4-20mA Analog Output 2
Drive Voltage: 18-26 V
Max Resistance: 600 Ohm
Configurable to repeat any probe measurement to
chart recorder, PLC, etc.
24V DC Power 2
24V power supply for sensors or flow meters
Max Current: 100 mA combined
Digital Pulse Output 2
24V digital pulse
Max Rate: 10 Hz

Section 2.0 -Introduction
Instruction Manual
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USB 2.0 1
Mass Storage for logs, profiles, and software
upgrades
Power: 500mA
Embedded Cellular
Modem
1 Verizon or AT&T/T-Mobile LTE
(1) NOTE: All powered relays fused together with 6.3A Slow Blow Fuse.
2.2 Unpacking Check List
Your carton contains many or all the following items. Please notify the carrier
immediately if there are any signs of damage to the parts.
DM7000 Series Controller Antenna 56437 Flow Cell 56566 (Optional)
Wall Mounting Screws (4) Bracket Locking Screws (4) Conductivity with Temperature Probe
56567 (Optional)
pH Probe 56569
(Optional) ORP Probe 56570 (Optional) pH/ORP Cable 56572 (Optional)

Section 3.0 -Installation
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Instruction Manual
Temperature Probe 56573
(Optional)
Flow Switch Assembly with
one 3/4” NPT Adapter 56568
(Optional) Mounting Panel (Optional)
Individual Probe Tee. 1" NPT w/ 3
3/4" Reducers 56954 (Optional)
3.0 Installation
3.1 Location and Installation
Locate the controller in an area convenient to create a process fluid bypass loop and
provide an electrical supply. When mounting probes inline, ensure the flow cell is always
full. Tap off the discharge side of the recirculation pump to provide at least 2.2 gallons per
minute of flow.
Air bubbles or drop in water level in flow cell may reduce the useful life of the
probes.
The controller should be mounted with the display at eye level with enough clearance to
open the lid and access the terminal blocks. It should not be operated in ambient
temperatures above 122°F (50°C).
Probes should be placed as close to the controller as possible. The included 20-foot
cables for pH and ORP cannot be extended without the use of preamplifiers. The battery
powered Sensorex PHAMP-1 may be used with an LMI 56955 BNC-BNC 20-foot extender
cable.
If possible, mount the controller on an exterior wall for improved cellular reception for LMI
Connect. For best coverage, mount the controller near a corner in the building.

Section 3.0 -Installation
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3.2 Controller Mounting
1. Determine the desired position of the controller on the wall. Refer to Figure 1 for
controller dimensions.
Figure 1: Controller Dimensions
2. Attachthemounting bracket to sheet metal or wood using the included screws. Screws
for other surfaces can be used with the 5.5 mm (7/32”) through holes as long the screw
head is less than 4 mm (5/32”) in height. M5 or 3/16” screws are recommended.
3. Once the mounting bracket has been securely fastened, attach the controller to the
mounting bracket and secure with the four included Phillips screws on the top and
sides of the controller. Refer to Figure 2for placement of screws.

Section 3.0 -Installation
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Instruction Manual
Figure 2: Controller Mounting Diagram
3.3 LMI Connect Antenna
Attach the included cellular antenna (56437) to the SMA Female connector on the left side
of the unit. Tilt the antenna so that it is pointing upwards. LMI Connect can be activated at
connect.lmipumps.com using the product serial number and LMI Connect ID that can be
found in System Settings – Network Settings. An account can be created with the
registration of a new device.
In challenging cellular reception environments, a 50 Ohm extension cable or amplified
cellular antenna can be used with an SMA Male connector. Wilson Amplifiers
manufactures a number of antennas and amplifiers with SMA Male connectors.
3.4 Inline Probe Installation
The LMI probes are shipped with a protective bottle or cover that may be filled with a
storage solution. After removing the cover, rinse the electrode tip with distilled water.
Do not remove protective bottle for an extended period before installation.
Allowing the probe to dry will reduce the useful life of the probes.
The LMI probes have ¾” NPT thread for inline installation. To simplify and ensure proper
submersion of the probes, LMI provides a Flow Cell (56566) that is pre-engineered to

Section 3.0 -Installation
Instruction Manual
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accommodate three probes and includes a sample valve. If more than one probe is used,
remove the second and/or third ¾” NPT cap on the flow cell.
The Flow Switch Assembly (56568) includes a ¾” NPT adapter that must be glued into
the PVC Tee. Attach the ¾” NPT adapter to the inlet or outlet of the flow cell prior to gluing.
The flow switch may be mounted within a horizontal pipe or within a vertical pipe with an
upward direction of flow.
Wrap each probe with no more than 3 wraps of Teflon tape, thread into the Flow
Cell finger tight, and use a 7/8” wrench or pliers to tighten an additional 1/2 turn.
The Flow Cell is pre-configured for a landscape orientation with the probes inserting from
the top, sample valve on the bottom, and inlet/outlet on the left or right. Refer to Figure 3
for orientation.
Figure 3: LMI Flow Cell
The Flow Cell can also be mounted in a portrait orientation by switching the location of the
sample valve and the ¼” NPT plug. Remove the Phillips screw and handle on the sample
valve to unscrew. In this configuration, the probes are inserted from the right, the sample
valve is on the bottom, the inlet is on the bottom, and the outlet is on the top.
In the portrait orientation, the water must flow upwards through the Flow Cell.

Section 3.0 -Installation
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Instruction Manual
3.5 LMI Mounting Panel (Optional)
A pre-engineered mounting panel as shown in Figure 4may be purchased to simplify and
assist with the installation process. The mounting panel includes pre-drilled holes that are
properly placed to allow for horizontal or vertical mounting depending on space
constraints.
Figure 4: LMI Mounting Panel
3.6 Batch Tank / Submersed Probe Installation
The Liquitron 7000 Series Controller can be used for batch control in pH-Only and ORP-
Only modes to control the effluent valve based on setpoint and time. This is commonly
used for wastewater treatment to ensure proper pH or ORP and for processing
applications. For Batch Mode, the Level Switch must be connected to the Flow Switch
Input at J13 as shown in Figure 18.
For probes that are submersed, attach the probe firmly to the tank to prevent damage to
the probe. Use the ¾” NPT threading on the top of the probe to attach an extension pipe
that reaches above thefluid level. Seal the top of the extension pipewith a gland to protect
the cable from water.
Probes must not be submersed without sealing the cable connection with an
extension pipe.

Section 3.0 -Installation
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Place the probe in a well-mixed area of the tank away from the chemical injection point to
ensure accurate readings. Placing the probe too close to the injection point may cause
spikes in readings that cause pumps to cycle on and off.
Figure 5: Submersed Probe Installation
3.7 Cooling Tower Installation
The Liquitron 7000 Series Controller should be installed based upon the recommended
system diagram in Figure 6. A bypass loop for open recirculating water systems is the
best method for monitoring and controlling conductivity. The probesmust receive an active
representative sample of system water.
Extension Pipe above
water line
Union with 3/4” NPT
Probe

Section 3.0 -Installation
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Instruction Manual
A system shutoff valve is recommended for installation on each side of the flow cell to
allow for system maintenance. A strainer is recommended to prevent debris from entering
the flow cell.
Injection of water treatment chemicals can be done directly into the bypass line. Chemicals
must be injected downstream of the probes to prevent spikes in measurements.
Installation of a flow switch on the bypass line is recommended to prevent dosing of
chemicals into a stagnant line. Flowmeters can be installed on the makeup and/or
blowdown lines to track water usage and control inhibitor feed.
Figure 6: Cooling Tower Installation
3.8 Boiler Installation
The Liquitron 7000 Series Controller when used for boiler conductivity control can be set
up in two different operating modes:
1. Continuous Sampling
2. Timed Sampling
The choice of which Boiler Sampling Mode to use is important. As a rule of thumb, if the
blowdown requirement of the boiler is greater than 5,000 lbs/hr, the boiler may be
continuously sampled. Since the boiler sample is sent to the drain and not returned to the
system, continuously sampling a smaller (less than 5,000 lbs/hr blowdown requirement)
boiler can result in excessive blowdown. Refer to Figure 7for Continuous Sampled Boiler
System Diagram.

Section 3.0 -Installation
Instruction Manual
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Figure 7: Continuous Sampling Boiler Installation
In timed sampling mode, the controller allows only periodic samples of boiler water to pass
by the probe. If the sample is high in conductivity, the sampling period extends until the
conductivity falls below preset levels. Once the conductivity is below the setpoint, including
differential, the periodic sampling resumes at the preset intervals. Refer to Figure 8for
Continuous Sampled Boiler System Diagram.
If the blowdown requirement for your boiler is unknown, it can be approximated.
Data Required:
•H.P. = Boiler Horsepower
•% Condensate = % of Condensate Return to Boiler
•Cycles = Cycles of Concentration
Formula:
•H. P. 34.5 = Steam Output (
)
•Steam Output 󰇡
󰇢  󰇡1 %   󰇢= . ( )
• .󰇡
󰇢  󰇡  󰇢= . ( )
Example:
•200 H. P. x 34.5 = 6,900 
 Steam Output
•6,900 
 Steam Output 󰇡1  󰇢= 3,450    .
•3,450 
  .  󰇡  󰇢= 1,150    .

Section 3.0 -Installation
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Instruction Manual
If metal piping is used, attach an earth ground connection near the conductivity
probe.
Figure 8: Timed Sample Boiler Installation
3.9 pH/ORP Inline Installation
The Liquitron 7000 Series Controller can be used for monitoring and controlling pH and
ORP in an inline installation as shown in Figure 9. The injection point for the chemical
should be a sufficient distance upstream from the Flow Cell with probes to allow for
chemicals to be adequately mixed.
Installation of a flow switch is recommended to prevent dosing of chemicals into a stagnant
line.

Section 3.0 -Installation
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Figure 9: pH/ORP Inline Installation
3.10Wiring
To access the wiring connections inside of the controller:
WARNING: Disconnect power prior to removing the black lid to access the
wiring terminals.
1. Remove the four (4) #1 Phillips screws on the corners of the controller until the
springs raise the screws.
2. Lift and remove the black cover.
3. Loosen the external nut on the desired cable gland while holding the gland in
place with a second wrench.
4. Remove the sealing dowel from the cable gland with the smallest diameter that
will accommodate the cable.
5. Insert the cable through the cable gland.
6. Locate the appropriate terminal on Figure 10.
7. For low voltage terminals, press the button on the terminal block and insert the
wire so that the insulation is not clamped. For high voltage terminals, use a
small Phillips or Flathead screwdriver to tighten the screw after inserting the
wire.
8. Tug lightly on the wire to ensure proper insertion.
9. Verify any unused holes have dowel plugs in place and tighten external nut on
cable gland.

Section 3.0 -Installation
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Instruction Manual
Figure 10: Complete Wiring Terminal Diagram
3.10.1 Power Input
When using a prewired unit, a 6-foot power cord with the appropriate connector is included
and wired to terminal block J32. When using a hardwired installation, insert the power
supply cable through the single cable gland and attach the wires to J32 as follows:
Eart h Groun d
(Green/Yellow Stripe)
AC Neutral (White/Blue)
AC L ine (Blac k/ Br own)
Figure 11: Power Input Wiring Diagram
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.

Section 3.0 -Installation
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3.10.2 On/Off Pump Output
The controller switches the input supply voltage to the pump output when chemical
injection is required. When using a prewired unit, four (4) 6-inch power output pigtails with
the appropriate connectors are included and wired to terminal blocks J24, J22, and J19.
The pump power cords can be attached directly to the output pigtail.
When using a hardwired installation, insert the power cable for each pump through the
cable glands and attach the wires as follows, repeating with pumps 2, 3 and 4 as required:
Eart h Ground
(Green/Yellow Stripe)
AC L ine (Blac k/ Br own)
AC Neutral (White/Blue)
Figure 12: Pump Power Output Wiring Diagram
3.10.3 Proportional Pump Output
The controller provides two pulse outputs that can be used for proportional pump controller
with either pH or ORP.
To use proportional control, the pumps must be connected to the appropriate relays. The
pulse output 1 will provide the pulse for the pump assigned to Relay 1. Pulse Output 2
provides the pulse for the pump assigned to Relay 2. Make sure the Acid and Base or
Reducer and Oxidizer pumps are assigned to Relays 1 and 2.
Proportional control is enabled in Application Settings – Pulse Pacing.

Section 3.0 -Installation
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Instruction Manual
Earth Ground
(Green/Yellow Stripe)
AC Line
(Black/Brown)
AC Neu t ral
(W hi te /Blu e)
P ul se O ut pu t S ign al
(Blue Wire)
P ul se O ut pu t G rou nd
(White Wire)
Base or
Oxidizer Pump
Earth Ground
(Green/Yellow Stripe)
AC Line
(Black/Brown)
AC Neu t ral
(W hi te /Blu e)
P ul se O ut pu t S ign al
(Blue Wire)
P ul se O ut pu t G rou nd
(White Wire)
Acid or
Reducer Pump
Figure 13: Proportional Pump Wiring Diagram
3.10.4 External Alarm Relay Power Output
The controller switches the input supply voltage to the External Alarm Relay when an
alarm is active that is configured to trigger the external alarm. Adjust the External Alarm
settings in Application Settings – External Alarms. Insert the power cable for the alarm
through the cable gland and attach the wires as follows:
Eart h Ground
(Green/Yellow Stripe)
AC L ine (Blac k/ Brown)
AC Neutral ( White/Blue)
Figure 14: External Alarm Relay Wiring Diagram
If a dry contact alarm is used, an external relay such as a Functional Devices RIB-U1C
can be used.