Cool Air LBW-420-LEL Manual
  1. Manuals
  2. Brands
  3. Cool Air Manuals
  4. Security System
  5. LBW-420-LEL
  6. Manual

Cool Air LBW-420-LEL Manual

Hide thumbs Also See for LBW-420-LEL:
Table of Contents

Advertisement

Quick Links

Download this manual
LBW-420-LEL (24 VDC powered)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LBW-420-LEL and is the answer not in the manual?

Questions and answers

Related Manuals for Cool Air LBW-420-LEL

Summary of Contents for Cool Air LBW-420-LEL

  • Page 1 LBW-420-LEL (24 VDC powered)

  • Page 3: Table Of Contents

    ETECTOR Zero ......................16 Span ......................17 TECHNICAL SUPPORT ....................19 WARRANTY ........................20 LBW-420 SPECIFICATIONS .................... 23 IMPORTANT—READ THIS FIRST P a g e FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 4: Cautions

    To avoid nuisance alarms, place the detector in service mode before: Programming the alarm set point. • Performing maintenance, repairs, testing, or calibration. • • Performing refrigeration system maintenance. P a g e FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 5: Introduction

    The LBW-420-LEL requires a DC supply voltage between 18- and 36-volts DC. The LBW-420-LEL can be configured to supply power to the 4-20 mA circuit(s) or can operate as a fully isolated 4-20 mA sensor. 4–20 mA Analog Outputs...
  • Page 6 It will also be use in setting options and calibration. this LED is on. FIRMWARE 1-5 P a g e Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 7: Front Panel-Mounted Circuit Board

    The factory default is 15 minutes. See “Setting the Service Mode Timeout” P a g e FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 8: The "Enter", "Up", And "Down" Pushbuttons

    “0”, then back to “3” to continue programming the alarm set point. P a g e FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 9: Enclosure-Mounted Circuit Board

    Power Power for the LBW-420-LEL must be a DC voltage between 18 and 30 volts with a current rating of at least 0.5 amps at 24 volts. Power is connected to terminal block J2.

  • Page 10: Jumpers

    A relay is energized (a non-alarm condition) when its LED is lighted (green), and de-energized (an alarm condition) when the LED is not lighted. P a g e FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 11: Contacts

    For this configuration, with the jumper J3 in the leftmost position (which connects pins 2 & 3) power for the 4-20 mA circuit is provided by the LBW-420-LEL. This circuit is shown below. The power supply must supply all power for the LBW-420-LELplus the 4-20 mA circuit.
  • Page 12 (which connects pins 1 & 2), power for the LBW-420-LELis supplied by the 24 VDC power supply #1 only. The power supply must supply all power for the LBW-420-LEL. Refer to the specifications page for the power requirements for the LBW-420- LEL.
  • Page 13 This circuit is shown in Figure 2 below: FIGURE 2 For the LBW-420-LEL, the maximum allowable resistance in the receiving device must not exceed Rmax using this formula: Rmax = 50 (Vs – 7.5) Where Vs is the supply voltage in volts DC for the 4-20 mA circuit.

  • Page 14: Installation And Setup

    10 minutes after power is first applied to the detector before testing). See the section on testing the detector. P a g e | 12 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 15: Programming And Operation

    PROGRAMMING AND OPERATION The LBW-420-LEL detector is easy to program and operate. Follow the instructions in this section to: Program the ammonia alarm set point • Set the 4 to 20mA range • Set the Service mode time out •...

  • Page 16: Setting The Service Mode Timeout

    “r1 (0 to 1% range), “r2” (0 to 2% range), “or “r3” (0 to 10% range). P a g e | 14 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 17: Test And Calibration

    To test the detectors response to ammonia (for best results, allow at least 20 minutes after first applying power to the detector): P a g e | 15 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 18: Zero

    “OFF” position. Amplifier Module (inside the housing) Zero adjust For factory use only Connection to Sensor FIRMWARE 1-5 P a g e | 16 Rev. 3.1 10/20/2022 Control Display Board Copyright © 2019 by Cool Air Incorporated. All rights reserved. connection...

  • Page 19: Span

    (typically “0” or “1”) and the service jumper to the “OFF” position and close the detector enclosure. P a g e | 17 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.
  • Page 20 Manual reset of the alarm condition” section “ P a g e | 18 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 21: Technical Support

    TECHNICAL SUPPORT For technical support, contact Cool Air Incorporated using any of these methods: Contact: Technical support 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...

  • Page 22: Warranty

    (12) month calibration service, which shall include proof of recordkeeping for testing and calibration by the Purchaser. Exclusions: P a g e | 20 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.
  • Page 23 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED Limitation of Liability P a g e | 21 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.
  • Page 24 TRANSACTIONS UNDER THIS WARRANTY MAY BE BROUGHT BY THE PURCHASER MORE THAN FIVE YEARS AFTER CAUSE OF ACTIONS HAS OCCURRED. P a g e | 22 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.

  • Page 25: Lbw-420 Specifications

    & TEST/NORMAL/SILENCE Options toggle switch Remote sensing – remote the sensor up to 500 feet from the detector P a g e | 23 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.
  • Page 26 This page intentionally left blank P a g e | 24 FIRMWARE 1-5 Rev. 3.1 10/20/2022 Copyright © 2019 by Cool Air Incorporated. All rights reserved.
  • Page 28 1544 134 AVE NE, Ham Lake, MN 55304 USA Phone (763) 205-0844 Fax (763) 432-9295 info@coolairinc.com www.coolairinc.com...

Table of Contents