Cool Air LBW-420-SS Manual
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Cool Air LBW-420-SS Manual

Solid state sensor only
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Solid State Sensor
Models
SOLID STATE SENSOR ONLY
LBW-420-SS (115VAC powered)
LBW-420-1-SS (24VDC powered)
LBW-420-2-SS (230VAC powered)

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Summary of Contents for Cool Air LBW-420-SS

  • Page 1 Solid State Sensor Models SOLID STATE SENSOR ONLY LBW-420-SS (115VAC powered) LBW-420-1-SS (24VDC powered) LBW-420-2-SS (230VAC powered)

  • Page 3: Table Of Contents

    INSTALLATION AND SETUP ............. 18 PROGRAMMING AND OPERATION ..........19 ..........20 ETTING THE ESIRED ISPLAY ROGRAMMING THE MMONIA LARM AND LARM ....................20 OINTS Page | 1 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 4: Lbw-420 Specifications

    4-20 mA DC, conforming to S50.01 ratings, Type 2L and Type 2H Operating Temperature -50°F to 125°F Operating Humidity 5% to 95% RH, non-condensing Page | 2 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 5: Important-Read This First

    763-205-0844 for more information. CAUTION: WARNING: RISK OF ELECTRIC SHOCK. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER TO QUALIFIED SERVICE Page | 3 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 6: Avoiding Nuisance Alarms

    A nuisance alarm will also occur if the external temperature sensor installation status is programmed to “F In” (installed) and an external temperature sensor is not installed. Page | 4 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 7: Introduction

    INTRODUCTION 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 1000 parts per million (PPM) (solid state sensor) or 0 to 500 parts per million (PPM) (electro-chemical sensor).

  • Page 8: Parts Description

    Ammonia concentration is displayed in parts per million and temperature is displayed in degrees Fahrenheit (“F”). The LED’s provide an indication of ammonia concentration and alarm status at a glance. Page | 6 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 9 Optionally it can display temperature. For information on how the display indicates ammonia concentrations, see the sections on ammonia leak indication Page | 7 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 10: Ammonia Sensor

    NOTE: The service switch may be a jumper instead of the switch. Page | 8 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 11: Service Switch (Service Mode )

    Calibrating the detector • When the detector is in operation, this switch is typically set to position “0” to continuously display ammonia concentration, or to Page | 9 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 12 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 | 10 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 13: Enclosure-Mounted Circuit Board

    The enclosure-mounted circuit board is shown in the following two pictures and described in detail below. NOTE: This detector does not support a 4 to 20mA output for the temperature sensor. Page | 11 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 14: Power (Lbw-420)

    (opposite of picture) 4-20 mA power must be supplied by an external supply. NOTE: This detector does not support a 4 to 20mA output for the temperature sensor. Page | 12 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 15: Jumpers Required

    Relay Status LEDs Each relay has a surface-mounted LED associated with it that indicates the status of the relay. A relay is energized (a non-alarm Page | 13 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 16: External Connections

    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 | 14 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 17 This circuit is shown in Figure 1 below: Figure 1. Page | 15 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 18 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 | 16 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 19 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 | 17 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 20: Installation And Setup

    Open the detector enclosure and place the detector in service mode by moving the service jumper to the “ON” position. Page | 18 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 21: Programming And Operation

    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 | 19 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 22: Setting The Desired Display Mode

    Low Alarm set point (PRE-ALARM RELAY). Press the “UP” or “DOWN” button until the desired set point concentration in PPM is displayed. Page | 20 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 23: Programming The External Temperature Sensor

    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 | 21 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 24: M Arange

    15d – After 15 minutes in the on position the detector will return to normal mode. Page | 22 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 25: Setting The Auxiliary Relay Pairing

    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 | 23 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 26: Error Codes

    Sensor Temperature greater than 160 F (this can happen in extreme heat usually outdoors) Sensor Defective (NH3-S-RPL) Message Codes If the service jumper is in the “on” position, the display message shows: Page | 24 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 27: 4-20 Ma Error Indication

    Hi alarm set point minus 5%, and the pre-alarm and optional Auxiliary relays will automatically reset when the ammonia concentration falls below the Low alarm set point minus 5%. Page | 25 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 28: Test And Calibration

    At the time of calibration, it is highly recommended to use a new test bottle of ammonia that can be purchased from Cool Air Inc. or their distributors. The detector is initially calibrated and programmed at the factory.

  • Page 29: Calibrating The Detector

    Install the jumper on the jumper pins (labeled “SET1”) located below the rotary selector switch on the front panel-mounted circuit board. Set the rotary selector switch to position “9”. Page | 27 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.

  • Page 30: Technical Support

    Remember, this step is only required if the service jumper was moved to the “ON” position in step # 2 above. Calibration is now complete. TECHNICAL SUPPORT For technical support, contact Cool Air Incorporated using any of these methods: Contact: Sales Representative...

  • Page 31: Warranty

    The repair or replacement of any such defective part shall be CAI’s sole and exclusive responsibility under this limited warranty. Page | 29 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 32 Purchaser or if the Purchaser fails to perform any duties set forth in this limited warranty or if the Page | 30 Rev. 10-4 9-25-2020 Copyright © 2018 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. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 34 This page intentionally left blank Page | 32 Rev. 10-4 9-25-2020 Copyright © 2018 by Cool Air Incorporated. All rights reserved.
  • Page 36 1544 134 AVE NE, Ham Lake, MN 55304 USA Phone (763) 205-0844 Fax (763) 432-9295 info@coolairinc.com www.coolairinc.com...

This manual is also suitable for:

Lbw-420-1-ssLbw-420-2-ss

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