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Table of Contents
Related Manuals for Cool Air LBW-420-EC
Summary of Contents for Cool Air LBW-420-EC
- Page 1 Electrochemical Sensor...
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Page 3: Table Of Contents
............. 19 ......................... 19 ..................20 4-20 ..............21 ROGRAMMING THE RANGE ............21 ............22 ..................... 23 ....................23 ................23 ................24 Page | 1 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 4: S P E C I F I C A T I O Ns
24Volts DC, 21.6 – 26.4, +/- 10% 0.5 Amps max. Dimensions 9½” H x 8” W x 4½” D Weight 6 lbs. Enclosure NEMA 4X rated, UL listed Pollution Degree Page | 2 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 5: C A U T I O N S
After applying power, test the detector to ensure it is operating correctly. Be sure the detector has been powered for at least 20 minutes before testing. Page | 3 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 6: I N T R O D U C T I On
“F In” (installed) and an external temperature sensor is not installed. The Cool Air Incorporated LBW-420 Family of Detectors is a state- of-the-art ammonia leak detector that detects and displays ammonia concentrations of 0 to 500 parts per million (PPM) electrochemical sensor or 0 to 1000 parts per million (PPM) solid state sensor. -
Page 7: S T A N D A R D F E A T U R Es
A remote alarm light and horn box with/or without a toggle • switch to TEST/NORMAL/SILENCE the alarm. Contact Cool Air Incorporated technical support for more detailed information, or for purchasing, any of these options. Page | 5 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 8: Part S D E S C R I P T I On
Optionally it can display temperature. For information on how the display indicates ammonia concentrations, see the sections on ammonia leak indication. Page | 6 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 9: B O A R D
NOTE: The service switch may be a jumper instead of the switch. Page | 7 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 10: R O T A R Y S E L E C T O R S W I T C H
Setting the information displayed on the front panel • Programming set points • Displaying system information • Calibrating the detector • Page | 8 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. - Page 11 Caution: Before closing the detector enclosure, be sure to return the rotary selector switch to position “0” or “1” to correctly display ammonia concentration, or ammonia concentration and external temperature. Page | 9 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 12 SET1 jumper and return the selector switch to the “0” position, then re-install the SET1 jumper and set the switch to the desired position. Page | 10 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
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Page 13: D C I R C U I T B O A R D
Ammonia 4-20 mA circuit or to use an on board 18 to 30-volt DC supply for the 4-20 mA circuits. Page | 11 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 14: R E L A Y S
If a loss of power to the detector occurs, the relays will de-energize and the alarms, if connected, will sound. Page | 12 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 15: R E L A Y S T A T U S L E D S
PPM = 6.25 (I – 4) 0 to 100 PPM Range Where PPM equals ammonia concentration in parts per million and I equal the output current in mA. Page | 13 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. - Page 16 This circuit is shown in Figure 1 below: Figure 1. Page | 14 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 17 LBW-420-1. The voltage drop across the detector and the receiver together must not exceed the power supply voltage. This circuit is shown in figure 2 below: Page | 15 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 18 10 VDC to a maximum 30 VDC can be used. The voltage drop across the detector and the receiver together must not exceed the power supply voltage. This circuit is shown in Figure 3 below: Page | 16 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
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Page 19: I N S T A L L A T I O N A N D S E T Up
Open the detector enclosure and place the detector in service mode by moving the service jumper to the “ON” position. Page | 17 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 20: P R O G R A M M I N G A N D O P E R A T I On
Set the 4 to 20mA range • Program the external temperature sensor installation status • Set the Service mode time out • Set the Aux Relay pairing • Page | 18 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. - Page 21 Low Alarm set point (PRE-ALARM RELAY). Press the “UP” or “DOWN” button until the desired set point concentration in PPM is displayed. Page | 19 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
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Page 22: I N
Be sure the external temperature reading is within the high and low temperature set points, then move the service jumper to the “OFF” position and close the detector enclosure. Page | 20 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. -
Page 23: Rogramming The Range
15d – After 15 minutes in the on position the detector will return to normal mode. 30d – After 30 minutes in the on position the detector will return to normal mode. Page | 21 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. - Page 24 Once you have selected the desired service mode timeout you must hold the ENTER button for two seconds before removing the SET 1 jumper or changing the rotary switch. Page | 22 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
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Page 25: M E S S A G E C O D E S
Message Code Description Service jumper “on” Any error condition will cause the ammonia level 4-20 mA signal to go to near zero indicating a fault. Page | 23 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved. - Page 26 At the time of calibration, it is highly recommended to use ammonia test gas that can be purchased from Cool Air Inc. or their distributors. Page | 24 Rev.
- Page 27 When the ammonia concentration reaches the Alarm, set point the Alarm LED (red) will be on. Digital display shows an increasing concentration of • ammonia in PPM. Page | 25 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 28 “OFF” position. Install the jumper on the jumper pins (labeled “SET1”) located below the rotary selector switch on the front panel-mounted circuit board. Page | 26 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 29 “ON” position in step # 1 above. Testing is now complete. Page | 27 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 30 For technical support, contact Cool Air Incorporated using any of these methods: Phone: (763) 205-0844 (USA) Fax: (763) 432-9295 (USA) E-mail: info@coolairinc.com Web site: www.coolairinc.com Address: Cool Air Incorporated 1544 134 Ave NE Ham Lake, MN 55304 Testing and maintenance supplies;...
- Page 31 3-months bump testing in non-critical areas, and annual or twelve (12) month calibration service, which shall include proof of recordkeeping for testing and calibration by the Purchaser. Page | 29 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 32 OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED Page | 30 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
- Page 33 REGARDLESS OF FORM, ARISING OUT OF THE TRANSACTIONS UNDER THIS WARRANTY MAY BE BROUGHT BY THE PURCHASER MORE THAN FIVE YEARS AFTER CAUSE OF ACTIONS HAS OCCURRED. Page | 31 Rev. 11-5 12/15/2020 Copyright © 2020 by Cool Air Incorporated. All rights reserved.
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