Cool Air LBW-420-1-SS User Manual

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Solid State Sensor

Cool Air LBW-420-1-SS Specifications

General

Brand	Cool Air
Model	LBW-420-1-SS
Category	Gas Detectors
Language	English

Summary

IMPORTANT—READ THIS FIRST

Safety Warnings

Safety warnings regarding electrical shock and user-serviceable parts, emphasizing qualified personnel.

INTRODUCTION

Product Overview

Describes the LBW-420 family of detectors, their ammonia detection capabilities, and model variations.

Avoiding Nuisance Alarms

STANDARD FEATURES

Core Functionality

Lists key features like programmable alarms, selectable PPM, test capabilities, and analog output.

PARTS DESCRIPTION

Front Panel Components

Details the front panel display, LEDs, and pushbuttons used for operation and programming.

Ammonia Sensor

Describes the solid-state sensor, its protection, heater, and base.

Circuit Boards

Explains the front panel-mounted and enclosure-mounted circuit boards and their roles.

Service Jumper and Mode

Details the service jumper for service mode and its impact on alarms and output signals.

User Interface Controls

Explains the function of the ENTER, UP, DOWN buttons and the Rotary Selector Switch.

Power and Signal Configuration

Covers power requirements for different models and jumper settings for 4-20mA signals.

Relays and Indicators

Describes the alarm, pre-alarm, and auxiliary relays and their associated status LEDs.

External Connections

4-20 mA Analog Outputs

Explains the 4-20 mA analog output for communication with external devices like computers and PLCs.

Wiring Diagrams

LBW-420 Wiring

Illustrates the 4-20 mA output circuit for the LBW-420 with a 115/230 VAC application.

LBW-420-1 (24 VDC) Wiring

Shows the 4-20 mA circuit for LBW-420-1 with a 24 VDC power supply (3-wire application).

INSTALLATION AND SETUP

Initial Setup Procedure

Step-by-step guide for preparing, mounting, and powering the detector before operation.

PROGRAMMING AND OPERATION

Display Mode Configuration

Instructions on setting the rotary switch to display ammonia concentration or temperature.

Alarm Set Point Programming

Guide on programming the Low and High alarm set points for ammonia detection in PPM.

External Temperature Sensor Setup

Procedure to program the installation status of the external temperature sensor.

4-20 mA Range and Service Mode Settings

Covers setting the 4-20 mA output range and the service mode timeout duration.

Auxiliary Relay Pairing

Setting the auxiliary relay to activate with errors, Hi Alarm, or Low Alarm.

Error and Message Codes

Error Codes

Lists possible error codes displayed on the unit and their potential causes.

Message Codes

Explains the 'SEr' message code indicating the service jumper is in the 'on' position.

System Indication and Maintenance

Ammonia Leak Indication

Describes how front-panel LEDs indicate ammonia concentration relative to alarm set points.

Detector Testing

Procedure to test detector hardware and system response without exposing the sensor to ammonia.

Detector Calibration

Steps to calibrate the detector using a known ammonia concentration for accurate readings.

TECHNICAL SUPPORT

Contact and Supplies

Provides contact information for technical support and lists available testing/maintenance supplies.

WARRANTY

Limited Warranty Terms

Outlines the 36-month limited warranty, including coverage, exclusions, and purchaser responsibilities.

Limitation of Liability

Specifies limitations on Cool Air Incorporated's liability, excluding indirect or consequential damages.