Permalert LiquidWatch Series User manual

Notice
The information contained in this manual, including but not limited to any product specifications, is subject to
change without notice.
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IN CONNECTION WITH THIS MANUAL OR ANY OTHER INFORMATION CONTAINED HEREIN OR THE USE
THEREOF.
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Please check the PermAlert website, www.permalert.com, for the latest revision of this manual.
The manual is typically revised at least once a year. The revision date is on the back cover.

LiquidWatch Installation Manual
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Table of Contents
1Introduction...............................................................................................3
1.1 General Description......................................................................................................... 3
1.2 Applications ..................................................................................................................... 3
1.3 Receiving and Handling Precautions............................................................................... 3
1.4 Material and Equipment Normally Supplied by PermAlert ............................................... 3
1.5 Material and Equipment Normally Supplied by Contractor............................................... 4
2LiquidWatch Installation...........................................................................5
2.1 Alarm Panel Installation................................................................................................... 5
2.2 Internal Wiring.................................................................................................................. 7
2.3 Control Relays ................................................................................................................. 7
2.4 RS-232 Port..................................................................................................................... 7
2.5 Intrinsically Safe - UL/CUL............................................................................................... 8
2.6 FCC ................................................................................................................................. 8
3Probe Installation......................................................................................9
3.1 UL/CUL LiquidWatch Requirements................................................................................ 9
3.2 Probe Configuration......................................................................................................... 9
3.3 Probe Installation........................................................................................................... 11
3.4 Surge Suppressor.......................................................................................................... 13
3.5 Typical Installations........................................................................................................ 14
3.6 PHLR Hydrocarbon Probe............................................................................................. 19
3.6.1 Cleaning Sensor Elements Procedure ................................................................ 19
3.6.2 Testing the PHLR................................................................................................ 20
3.6.3 Troubleshooting .................................................................................................. 20
3.7 Probe Tests ................................................................................................................... 21
3.7.1 PHL-LW - Tests................................................................................................... 21
3.7.2 PHL-LW - Reset.................................................................................................. 21
4Output Relay Module Installation........................................................... 23
4.1 Output Relay Module Wiring.......................................................................................... 23

LiquidWatch Installation Manual
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5LiquidWatch Operation........................................................................... 25
5.1 General.......................................................................................................................... 25
5.1.1 Theory of Operation ............................................................................................ 25
5.1.2 Power Up............................................................................................................. 25
5.1.3 Initial Display.......................................................................................................25
5.1.4 Contrast Adjustment............................................................................................ 25
5.1.5 Clock Battery....................................................................................................... 25
5.1.6 Installation Instructions........................................................................................ 26
5.2 Operating LiquidWatch...................................................................................................26
5.3 Setup.............................................................................................................................. 26
5.4 Probe On/Off.................................................................................................................. 28
5.5 History............................................................................................................................ 28
5.6 Display Setup................................................................................................................. 29
5.7 Configuration.................................................................................................................. 29
5.7.1 Test Mode ...........................................................................................................30
5.7.2 Time and Date.....................................................................................................30
5.7.3 Number of Probes............................................................................................... 31
5.7.4 Number of Relays................................................................................................ 31
5.7.5 System I.D...........................................................................................................31
5.7.6 Baud Rate ........................................................................................................... 31
5.7.7 Phone Number....................................................................................................32
5.7.8 Version................................................................................................................ 32
6Monitoring ............................................................................................... 33
6.1 Monitor........................................................................................................................... 33
6.2 Normal Messages Displayed ......................................................................................... 33
6.3 Fault Messages Displayed............................................................................................. 33
6.4 Alarm Silence Feature.................................................................................................... 34
6.5 Output Relays ................................................................................................................ 34
Appendix......................................................................................................... 35
System Testing....................................................................................................................... 35
Communications Options........................................................................................................ 36
Troubleshooting...................................................................................................................... 37
Warranty ......................................................................................................... 39

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1 Introduction
1.1 General Description
This LiquidWatch®Installation and Operation Manual is intended for use as a general guide for
LiquidWatch Leak Detection Systems. Users (installers) should independently evaluate the suitability of
this information and PermAlert’s products for their application and specific installation. If you received a
PermAlert product that is not described in this manual, contact PermAlert for the appropriate instructions.
1.2 Applications
The LiquidWatch system consists of an electronic microprocessor-based alarm panel that monitors
probes. The probes may be installed in many applications including: secondary contained piping, double
wall tanks, sumps, computer room subfloors, cleanroom subfloors or any area where liquids need to be
detected. There are two LiquidWatch models available:
Model LW64 monitors up to 64 probes in ordinary locations.
Model LW64-IS monitors up to 64 probes in Class I, Division 1, Groups C & D, hazardous
locations.
Each base system will monitor up to 8 probes and has a common alarm output relay. If additional
probes or output relays are required, the following modules are available:
Model RPM-8 is a remote probe module that can monitor up to 8 probes.
Model ORM-4 is an output relay module with 4, 10 A, 250 VAC rated relays.
Model ORP-16 is an output relay panel with 4, 10 A, 250 VAC rated relays, expandable to 16
relays.
1.3 Receiving and Handling Precautions
The following general precautions should be observed:
1. Read this manual carefully before beginning any work. Do not use substitute materials or short
cut recommended procedures. Understanding and following this guide is essential to avoid
installation problems.
2. Collect the needed quantities of all materials well in advance of scheduled work.
3. Check the packing list against received items. Report immediately any shortages or damaged
materials to the delivering carrier.
4. All probes must be tested immediately upon receipt following the probe test procedures contained in
this manual. Report immediately to PermAlert any probes that fail this quality control test.
5. System drawings, provided by the designer, should indicate the extent, general location and
arrangement of leak detection equipment and probes. The contractor (installer) should become
familiar with all details of the installation before proceeding.
6. A qualified electrician should perform electrical work.
1.4 Material and Equipment Normally Supplied by PermAlert
Each system may include the following items as quoted:
1. Leak detection alarm panel
2. Communication cable
3. Lead wire
4. Probe adapter assembly
5. Probes

1 Introduction
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6. Watertight junction boxes conforming to NEMA 4X
Maximum No. of
Cable Junctions
in Enclosure
Enclosure
Dimensions
4
6” x 6” x 4”
6
8” x 6” x 4”
8
10” x 8” x 4”
7. Watertight cord grips
8. Shrink tubing for cable connectors
9. RTV adhesive/sealant for cable connectors
1.5 Material and Equipment Normally Supplied by Contractor
Each system may require the installing contractor to supply the following items:
1. Electrical conduit, junction boxes and wiring, as required.
2. Ohmmeter for testing.
3. Hot air gun for shrink tube application on connector assemblies.
NOTE:
All probe lead and communication cable should be run in conduit to protect the cable from physical
damage. In an area subject to strong electrical interference, grounded metal conduit is recommended.
Contact PermAlert for additional information.

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2 LiquidWatch Installation
2.1 Alarm Panel Installation
1. The standard LiquidWatch alarm panel may be permanently mounted indoors or outdoors in an area
with an ambient temperature of not less that 0°F and not exceeding 120°F. The enclosure must not
be located in direct sunlight, to prevent excessive heat buildup.
2. The power conduit entrance should be located in the upper right corner of the enclosure (see Figures
1 and 2). Model LW64-IS must not have the power conduit in the lower portion of the
enclosure, where it will interfere with the partition or the intrinsically safe wiring
compartment. Inspect and clean the interior of the enclosure before continuing. Connect all
electrical conduits.
3. Wire the unit to an isolated (circuit breaker protected) 120 VAC, 50/60 Hz circuit. Earth ground
must be connected solidly to the ground screw, which is located in the upper right corner of the
LiquidWatch alarm panel back plate. Failure to connect earth ground can result in faulty alarm
panel operation. See Figures 1 and 2 for LiquidWatch alarm units wiring diagrams.
4. The LiquidWatch alarm panel is supplied with an internal probe board that can monitor up to 8
probes. An optional remote probe module, RPM-8, can monitor 8 probes. A total of 7 RPM-8 boards
can be monitored for a total system capacity of 64 probes. Each remote probe module is connected
in parallel to the internal probe board using a 15 conductor shielded cable.
5. Each probe is supplied with 20 feet of shielded probe lead cable and an integral probe adapter.
Additional probe lead cable is required if the probes are not located close enough to the alarm panel
or remote probe modules. It is recommended to run all lead cable in conduit for protection of the
cable.
6. The LW64-IS system has a partition covering the internal probe board. Remove the partition (cover)
over the probe board on the LiquidWatch panel by removing the 5 mounting screws.
7. Install the lead cables using the instructions in this manual. The cable must exit the enclosure under
the partition for LiquidWatch Model LW64-IS (see Figures 2 and 3).

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Figure 1
Component Layout for LiquidWatch Model LW64
Figure 2
Component Layout for LiquidWatch Model LW64-IS

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Figure 3
Enclosure Dimensions
2.2 Internal Wiring
LiquidWatch is shipped with a 2 line x 20 characters LCD, a green LED (power), a red LED (alarm), and
a horn on the door of the panel. The wiring for the horn is a 2-wire cable connected to a connector on
the back of the LCD. The keypad is a 4 key membrane switch. The green LED is illuminated when the
panel is powered. The red LED is illuminated when any probe is in alarm.
There are ground wires that must be securely connected to the white backplate mounting screws.
In each case, the external tooth lock washer should be placed against the white painted
backplate and then the ring terminal placed on top of the lock washer (see Figures 1 and 2 for
Ver. B LiquidWatch Controller Board):
LiquidWatch model LW64-IS has 2 ground wires from the intrinsically safe barrier that are
factory-installed to the 2 mounting screws beneath the intrinsically safe partition. If the backplate
is removed and reinstalled, reconnect the ground wires.
The shield wires from all shielded probe leads and communication cables must be connected to
either of the mounting screws at the bottom of the backplate as shown. The shield wires should
be connected together in a ring terminal(s) (#10 stud).
2.3 Control Relays
When LiquidWatch detects a fault condition, it switches a SPDT common alarm output relay rated for
250 VAC, 10 A. This relay is located on the main controller board. LiquidWatch is shipped with the
relays configured to operate in a normally energized mode, so they de-energize in the alarm state
and are not reset until the alarm condition is cleared.
When LiquidWatch is in alarm, the silence key can be pressed to silence the horn. If an optional output
relay module(s) is installed, 4 relays per module are available. The relay(s) remains switched until the
fault is cleared or the active probe is taken off-line.
2.4 RS-232 Port
LiquidWatch is provided with an RS-232 communications port. Refer to Figures 1 or 2 for the location.
There is a 9-pin connector located on the controller board.

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2.5 Intrinsically Safe - UL/CUL
LiquidWatch LW64-IS is Listed by Underwriters Laboratories, Inc., for use in ordinary locations. LW64-IS
provides intrinsically safe output circuits for use in Class 1, Division 1, Groups C and D hazardous
locations when used with LiquidWatch sensor probes and installed in accordance with the instructions in
this manual. Refer to Section 3.1 for specific probe UL requirements. Also, refer to LiquidWatch control
drawing, Figure 4, for intrinsic safety requirements.
THE MAXIMUM OPERATING VOLTAGE ALLOWED IN THE LIQUIDWATCH PANEL IS 250 VAC. IN
ADDITION, THE VOLTAGE ON ANY WIRES TO THE CONTROL RELAYS MUST BE LIMITED TO 250
VAC.
The partition (cage) must be installed over the intrinsically safe barrier and internal probe board before
operating the system.
Figure 4
LiquidWatch Control Drawing
2.6 FCC
The user is cautioned that any changes or modifications, not expressly approved by the party
responsible for FCC compliance, could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses and can radiate radio frequency energy and if not installed and used in
accordance with this instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.