OMNTEC LU4 Four Channel Alarm Panel Installation Guide

OMNTEC LU4 Four Channel Alarm Panel

LU4 SPECIFICATIONS

POWER INPUT
85-125 VAC, 47-440 Hz
16 Watts maximum
POWER TO SENSORS
2 VDC @ 13 mA
RELAY OUTPUT
SPST normally open dry contacts 0.5 AMPS, 120 AC/DC switches when an alarm condition occurs
WEIGHT
6 LBS.
DIMENSIONS
(W) 9” x (H) 10.5”
SENSOR CABLE
Shielded 22 AWG UL-E118830 CM Maximum length 2000 feet
ENCLOSURE
NEMA 4X
OPERATING TEMPERATURE
-40° to 140° F
UL LISTED
Intrinsically safe circuits for use in class I group D hazardous locations when connected in accordance with control drawings L4
AUDIO/VISUAL CONSOLE
AUDIBLE ALARM – 95 dB pulsing horn with 30 second timeout
REDLIGHT – Indicates liquid alarm
TEST BUTTON – When pressed will test system lights and horn
GREEN   LIGHT – Indicates the power is on
HORN OFF BUTTON – Silences the audible alarm when pressed
SENSORS
L-1 High level sensor
LS-ASC Liquid sensor
LWF Double wall liquid sensor
OPTIONAL ACCESSORIES
RA-1 Audio/visual remote annunciator
RLY-RA Relay (consult factory)
RA-1-NYS Remote annunciator with strobe (consult factory)
LABELS
Provided with controller

DIMENSIONS FOR MOUNTING AND KNOCKOUTS

LU-SERIES INSTALLATION INSTRUCTIONS

READ ALL INSTRUCTIONS PRIOR TO SYSTEM INSTALLATION. ALL WIRING IS TO BE DONE IN ACCORDANCE WITH ALL NATIONAL AND LOCAL ELECTRICAL CODES. POWER IS TO BE OFF DURING ANY WIRING. WIRE AND TEST ENTIRE SYSTEM BEFORE UTILIZING SK-4 CONNECTOR SEALING KITS. STANDARD EQUIPMENT IS COMPATIBLE WITH MOST PETROLEUM PRODUCTS. SOME CHEMICAL AND SOLVENTS REQUIRE SPECIFIC MATERIALS OF CONSTRUCTION. IF UNSURE OF COMPATIBLE CONTACT MANUFACTURER.

• For waste oil applications consult factory *

L-SERIES SENSOR

1. L-1 SENSOR
   The L-1 sensor (see pg. 12) is primarily used to detect a liquid level inside the tank. The sensor detects a single liquid level and is typically used for overfill protection at 90% tank capacity. Standard sensor part numbers are L-1-S (12”), L-1-L (20”), L-1-D (custom length).
   The L-1 sensor is installed into the tank via the 2” bushing which is an integral part of the sensor. This sensor screws directly into a 2” female threaded NPT (use a reducer bushing if necessary).

Connection of the sensor to the control unit cable is made in a junction box. For detailed wiring scheme refer to appropriate drawing (see pg. 9 and 10). These connections must be made using supplied SK-4 connector sealing kit.

2. LS-ASC SENSOR
   The LS-ASC sensor (see pg. 11) is designed to detect liquid in sumps or containment areas and steel interstitial spaces for above ground and underground tanks.

3. To install the LS-ASC sensor as an above ground sump sensor mount a junction box between 2 and 3 feet above bottom of containment area. Attach sensor to junction box via conduit or cable clamp, leaving a ¼” clearance between the sensor end and the bottom of the containment area. For detailed wiring scheme refer to appropriate drawing (see pg. 9 and 10). Connect sensor cables to control unit cables in junction box using supplied SK-4 connector sealing kit.

4. To install the LS-ASC as a double wall tank sensor remove the oil tight from the sensor cable. Feed the cable through the appropriate bushing required to adapt the interstitial port to 3/4” NPT (oil tight). Feed wires through oil tight, leaving it loose. Gently lower sensor down interstitial port until it rests on the bottom. Install oil tight into the bushing. Pull sensor up by the cable until it just comes off the bottom. Maintain this position and tighten the oil tight fitting. This is required to seal the interstitial port. All connections are made using the supplied SK-4 connector kit.

5. *LWF- SENSOR*
   The LWF- sensor (see pg. 13) is designed to detect liquid in the interstitial space of a double wall fiberglass tank. The LWF-* sensor is installed through the interstitial port. If the tank is pitched, locate the interstitial sensor at lowest elevation of tank. Insert sensor into the interstitial port and push down around outside of inner tank. When PVC handle contacts the inner tank the sensor should be located at the bottom of interstitial space. Reduce the riser to 3/4″ NPT and install the supplied oil tight fitting. The oil tight fitting must be installed to prevent liquids from entering the interstitial space. Run conduit from interstitial manhole to the central junction box, located in the manway. Install a second oil tight on the sensor cable and pull sensor cable through conduit. Connect oil tight to conduit and tighten. For detailed wiring scheme refer to appropriate control drawing (see pg. 9 and 10). Connect sensor wires in central junction box to control unit cable(s) and use SK-4 connector sealing kit.

CONTROL UNIT

The control unit (see pg. 3) should be mounted in a manned area. Route sensor control cable through conduit from the junction box to the control unit. Sensor control cables enter the control unit through the output port only. The cables are wired as shown in the appropriate drawing (see pg. 9). The control unit accepts any possible combination of L series sensors.

INPUT POWER HOOKUP

Input power requirements are:
85-125 VAC
16 Watts max
47-440 Hz
Input power cable should be wired in accordance with all pertinent electrical codes. This cable should enter the control unit through the input power port only. The power is hooked up to the power supply and wired as per control drawing (see page 10).
NOTE: EARTH GROUND TERMINAL MUST BE CONNECTED.

1. REMOTE ANNUNCIATOR OPTION
   Mount remote annunciator (see pg. 14) within audio / visual range of the filling operator.
   NOTE: the remote must be outside of the HAZARDOUS AREA. Pull appropriate low voltage wire from the remote to the control unit. See appropriate drawing for wiring details. Run wires through output port. Connect color coded nuts.

2. SK-4 CONNECTOR SEALING KIT
   Make all splices using SK-4 connector kit (supplied)

LU4 CONTROLLER CONNECTION DIAGRAM

COLOR CODE

CABLES FROM SENSORS TO REMOVABLE SENSOR INPUT CONNECTORS

FROM SENSOR #1, #2, #3

8| SHIELD DRAIN
9| BLACK| GROUND

FROM SENSOR #4

10| SHIELD DRAIN
11| RED| SENSOR #4
12| WHITE
13| UNUSED|
14| UNUSED|
15| UNUSED|
16| UNUSED|

WIRES TO OPTION BOARD

WIRES FROM RA-SERIES REMOTE

WIRES FROM RELAY OUTPUTS

120 VAC

WIRES TO POWER SUPPLY

NOTE: To maintain proper shielding, BLACK sensor wires and SHIELD DRAINS should not be connected together at sensors.

LU4 SYSTEM CONTROL DRAWING

NOTES ON PROBES

1. THE INTRINSICALLY SAFE FIELD WIRING SHALL BE INSTALLED IN ACCORDANCE WITH ARTICLE 504 IN THE NATIONAL ELECTRIC CODE ANSI/NFPA 70
2. ALL PROBES ARE ELECTRICALLY IDENTICAL AND MAY BE INTERCHANGED ALLOWING SYSTEM FLEXIBILITY
3. PROBE TO CONTROL UNIT CABLE WILL BE TWO PAIR OF #22AWG WITH SHIELD AND DRAIN PVC JACKETED UL-118830 CM. CABLE LENGTH WILL BE LIMITED TO 2000 FEET MAXIMUM

NOTES ON CONTROL EQUIPMENT

1. ALL WIRING MUST MEET LOCAL AND NATIONAL ELECTRICAL CODES
2. SYSTEM EARTH GROUND MUST BE CONNECTED TO TERMINAL F.G. TO INSURE INTRINSIC SAFETY AND MUST BE LESS THAN 10 WITH RESPECT TO EARTH GROUND
3. OPTIONAL REMOTE REQUIRES #22 AWG LOW VOLTAGE COMMUNICATION CABLE MINIMUM

LS-ASC SENSOR

NON-PRODUCT DISTINGUISHING OPTIC SENSOR

**PRINCIPLES OF OPERATION**

**LS-ASC SPECIFICATIONS**

U.L. LISTED 5L04
Intrinsically safe Class I, Group D Hazardous Locations when connected in accordance with control drawing nos. L1, L2, L3, L4, L6, L9

OPERATING TEMPERATURE
-40 TO +140 F

POWER
2 VDC @ 13 mA

WEIGHT
1/2 pound

PRINCIPLES OF OPERATION
LIQUIDS (ex: fuel, water) – Photo optic DRY CONDITION – Normally closed light beam ALARM CONDITION – Opens (refracts) normally closed light beam

SENSOR CABLE
F Shielded 22 AWG UL-E118830 CM Maximum length 2000 feet

RESPONSE TIME
Immediate

L-1 SENSOR

LIQUID LEVEL OPTIC SENSOR

L-1 SPECIFICATIONS

U.L. LISTED 5L04
Intrinsically safe Class I, Group D Hazardous Locations when connected in accordance with Control Drawing nos. L1, L2, L3, L4, L6, L9

OPERATING TEMPERATURE
-40 TO +140 F

POWER
2 VDC @ 13 mA

WEIGHT
2 pounds

PRINCIPLES OF OPERATION
LIQUIDS (ex: fuel, water) – Photo optic DRY CONDITION – Normally closed light beam ALARM CONDITION – Opens (refracts) normally closed light beam.

SENSOR CABLE
F Shielded 22 AWG UL-E118830 CM Maximum length 2000 feet

RESPONSE TIME
Immediate

LWF SENSOR

NON-PRODUCT DISTINGUISHING FIBERGLASS TANK DRY INTERSTITIAL SENSOR

**LWF SPECIFICATIONS**

OPERATING TEMPERATURE
-40 TO +140 F

POWER
2 VDC @ 13 mA

WEIGHT
2 pounds

PRINCIPLES OF OPERATION
LIQUIDS (ex: fuel, water) – Photo optic DRY CONDITION – Normally closed light beam ALARM CONDITION – Opens (refracts) normally closed light beam

SENSOR CABLE
Shielded 22 AWG UL-E118830 CM Maximum length 2000 feet

RESPONSE TIME
Immediate

RA-SERIES REMOTE HIGH-LEVEL ALARM

INTERNAL WIRING COLOR CODE

SPECIFICATIONS

maximum from controller

Wire| 22 AWG minimum
Weight| 1 lb.

LU-SERIES SYSTEM OPERATION AND TEST INSTRUCTIONS

1. On the front panel the Green “SYSTEM DETECTING” light should be on indicating that system is up and running

2. If sensors are not in alarm, all Red lights should be off
   a) Optical sensors are solid state and use a normally closed light loop in a prism for sensing. When liquid is present at sensor, the normally closed loop of light is open, thus sending an alarm signal back to the alarm panel. The panel responds by turning on the appropriate light and sounding an audible alarm.
   
   b) Since OMNTEC employs electro-optic technologies and works off a normally closed beam of light. Any wire break, disconnection, short circuit, or sensor malfunction will be immediately indicated at the control panel.
   

3. Since system sensors are solid state and work with normally closed loop of light, sensors can be tested as follows:
   a) Hit the test button on alarm panel and observe panel lights.
   b) If all lights illuminate and audible alarm sounds, system test is complete.
   c) When test button is hit a signal is sent to sensor to turn its light off. What this does is put the sensor into an alarm condition by simulating an actual alarm event by opening the normally closed light loop.
   d) The sensor then responds as explained in part 2(a).

4. System should be tested, at a minimum, on a weekly basis.

5. The physical location of all sensors should be checked for proper location, at a minimum, on an annual basis (i.e. *high level, interstitial, sump, piping sump).

6. Every alarm, malfunction and test result should be recorded in a dated signed log.

*L -Series sensor high level to be set at no greater than 95%. Pump shutdown available when using RL Y series relays.

LU-SERIES TROUBLESHOOTING PROCEDURES

FOR LU-SERIES CONTROLLERS WHEN USED WITH ELECTRO-OPTIC SENSORS

Be sure the following criteria are met before proceeding:

1. Controllers have their own separate isolated Earth Ground
2. Controllers have their own separate isolated Field Ground
3. The Controller should have 13.8 VDC on the output of the power supply (Across the yellow-positive and gray-negative wires)
4. 120VAC wires are in their own separate isolated conduit
5. Remote Annunciator wires are in their own separated isolated conduit
6. Sensor wires are in their own separate isolated conduit
7. Sensor shield drain wire is not connected to black wire at sensor splice
8. Black & shield drain are connected to ground at removable input connector
9. Sensor head (prism) is not exposed to any external light (i.e.: sunlight, indoor light, etc)
10. Sensors are free of dirt and debris
11. Sensor extension cables are minimum 3 conductor #22 AWG shielded with drain wire
12. Sensors wires do not exceed 2000 ft.
13. The “POWER” should be illuminated
    
    Be sure that the sensor head (prism) is not exposed to any external light (i.e: sunlight, indoor light, etc.)

TROUBLESHOOTING PROCEDURES

“Red Light” remains on.1) Check if sensor is actually in alarm (submerged)Horn does not sound on controller when the “TEST” button is pressed. 1) Are any “Red Lights” illuminated on controller?

(YES) controller is functioning. Proceed to step 2.
(NO) controller is not functioning (consult factory).
2) Check wiring at removable input connector. Concentrate on white, black and shield wire inputs from sensors, making sure no shorts are present. Re- plug connector and press test button.
Does the “Red Light” illuminate?| (YES) system is functioning properly.
(NO) Proceed to step 3.
3) Check splice at sensor for moisture or miss-wire (concentrating on white and black wires from sensor). Correct problem and press test button. Does the “Red Light” illuminate?| (YES) problem are in the wire connections at splice
(NO) sensor is not functioning properly. Proceed to step 4.
4) Remove sensor from installation, connect at controller, shroud from light and press test button. Sensor head (prism) is not exposed to any external light (i.e. sunlight, indoor light, etc.). Does the “Red Light” illuminate?| (YES) problem in wire run to sensor. System is functioning properly.
(NO) The sensor failed (consult factory)
“Red Light” remains on.| 1) Check if sensor is actually in alarm (submerged)| (YES) correct alarm condition.
(NO) proceed to step 2.
2) Check wiring at removable input connector concentrating on red, white, black and shield wire inputs from sensors. Make sure no open circuits are present. Re-plug the connector and press test. Does the “Red Light” stay on?| (YES) proceed to step 3. (NO) System is functioning

properly. Problem was in the wire or connections.

3. Disconnect sensor wires from removable sensor input connector. Connect a jumper from the white input to the black input at the connector. Make sure all sensor wiring is disconnected. Does the “Red Light” stay on?| (YES) Controller is not functioning properly (consult factory)(NO) Controller driver boards are functioning properly. Proceed to step 4.
4. Check DC voltage from red input to black input. Is it 7.5 – 9V DC?| (YES) proceed to step 5
   (NO) Controller is not functioning properly. Consult factory.
5. Check splice at sensor for moisture or miss-wire. Correct problem. Does the “Red Light” stay on?| (YES) proceed to step 6.
   (NO) If light goes off before pressing test button and goes on after pressing test button System is functioning properly.
   Problem was in the connection or wire.
6. Connect sensor directly to controller. Make sure sensor head is not exposed to light during test. Does the “Red Light” stay on?| (YES) Sensor is not functioning properly (consult factory)
   (NO) Problem is in the wire or connections.
   Horn does not sound on controller when the “TEST” button is pressed.| 1) Are any “Red Lights” illuminated on controller?| (YES) Make sure at least one input is not in alarm state. Then proceed to step 2.
   (NO) proceed to step 2.
7. Shut down system for 30 seconds. Turn system back on. Does horn sound when hitting the “TEST” button?| (YES) Controller is functioning properly.
   (NO) Controller is not functioning properly. Proceed to step 3.
8. While holding the “TEST” button down put a voltmeter on the positive and negative on the back of the horn. Do you get 13.8 volts +/- 1?| (YES) Your horn does not work. Replace horn.
   (NO) Your horn board is not working (consult factory)

WARRANTY

The seller OMNTEC Mfg., Inc. warrants to buyer defects when properly installed, and maintained by user. The seller’s sole obligation is to repair or replace parts found to be defective, or nonconforming for one year and only after evaluation by factory. The liability of the seller shall not exceed the price paid for the components found to be defective. The above warranty is exclusive of all other warrantees whether implied or expressed. Seller assumes no obligation for special or, indirect damages incurred by user.
All standard tank gauging systems are free of defects when properly installed and maintained by user. Warranty on tank gauging systems will only be effective after proper documentation has been submitted by the buyer to OMNTEC Mfg., Inc. The seller’s sole obligation is to repair or replace parts found to be defective, or non-conforming for one year and only after evaluation by factory. Technical support must be contacted for a Return Material Authorization (RMA #) prior to sending any potentially defective parts. The liability of the seller shall not exceed the price paid for the components found to be defective. The above warranty is exclusive of all other warrantees whether implied or expressed. Seller assumes no obligation for special or indirect damages incurred by user.
All standard replacement parts, “add-ons”, or spare parts are free of defects when properly installed and maintained by user. The seller’s sole obligation is to repair or replace parts found to be defective or non-conforming for 90 days and only after evaluation by factory. The liability of the seller shall not exceed the price paid for the components found to be defective. The above warranty is exclusive of all other warrantees whether implied or expressed. Seller assumes no obligation for special or indirect damages incurred by user.
Equipment not covered by this warranty includes but is not limited to: custom equipment and control systems.

CUSTOMER SUPPORT

1. Open the camera app
2. Focus the camera on the QR code by gently tapping the code
3. Follow the instructions on the screen to view PDF file
   

OMNTEC Mfg., Inc., 2420 Pond Road, Ronkonkoma, NY 11779
Phone 631-981-2001
Fax 631-981-2007
www.OMNTEC.com
File Name: LU4 rev2406.docx Page 20 of 20 Rev Date: 2-6-2024

References

• OMNTEC | Tank Monitoring & Leak Detection Systems

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