E3Point® Gas Monitor - Quick Start Guide

Introduction

The E3Point® gas detection system integrates a gas sensor (electrochemical or catalytic type), a control unit, a buzzer, a relay, and RS-485 into one reliable and robust product. The polycarbonate housing is resistant to rust, dents, and corrosion, making it suitable for commercial use in certain outdoor and indoor environments like parking garages and mechanical rooms.

Installation

Key installation considerations include height and detection objectives. For fastest leak detection, mount the sensor near potential leak sources. This may mean the indicated concentration isn't representative of personnel exposure, and calibration/maintenance access might be difficult. Assess local air currents, as they often influence gas concentration areas more than vapor density. Generally, place at least one sensor near likely emission points, ensuring it's accessible for calibration and maintenance.

For personnel protection, mount the unit in the “breathing zone” (3.5 to 5 ft. / 1 to 1.5m from the ground). Protect the sensor from water, wash-down, and excessive humidity. Keep sensor and wire runs away from mercury vapor lights, variable speed drives, and radio repeaters to prevent electrical interference. Protect the sensor from physical damage. Do not mount the sensor flat on a ceiling or on a vibrating surface.

Detected Gas Installation Heights

*May differ in certain applications. Hot NO₂ from exhaust systems is lighter than ambient air.

Duct Mounting

Use the custom housing provided with the duct mount version. Ensure airflow is between 500–4000 fpm for best results.

1. Measure and mark holes for intake and exhaust tubes.
2. Drill holes in the duct: 1 1/2 in. (38 mm) for air intake, 1/2 in. (13 mm) for air exhaust.
3. Affix intake and exhaust tubes to the duct mount housing.
4. Insert tubes into the duct holes.
5. Orient air holes on the intake tube to face the airflow.
6. Attach housing to duct with four 8 x 3/4” galvanized or zinc-plated sheet metal screws (not provided).
7. Remove a knockout for cable entry and affix appropriate conduit.
8. Run wiring through conduit and housing to the monitor.
9. Connect wires (see Wiring section).
10. Screw the cover onto the monitor and replace the housing cover.

Dimensions: 11.1 cm (4 3/8”) height, 8.3 cm (3.281”) width.

Wall Mounting

Mounting is typically on concrete walls or columns, but can be on any vertical surface or standard electrical junction box. The housing has rear spacers for moisture flow. Mounting holes are inside the housing.

1. Open the unit and drill holes: 4 3/8” (11.1 cm) apart for wall mounting, or 3.281” (8.3 cm) height for electrical boxes. Do not remove the PC board when removing knockouts.
2. Mount securely using appropriate screws and anchors (#6 screws recommended).
3. Tighten screws to 8.7 in-lb (1 Nm) maximum.
4. Close the unit cover and tighten cover screws to 29.7 in-lb (3 Nm).

Wiring

Power wiring must comply with all applicable codes. Minimum #20 AWG for general wiring; #14 or #12 AWG for 120 VAC. Signal wiring should use #20-24 AWG shielded twisted pair cable (e.g., Belden 9841). Network units should not exceed 2,000 ft (600 m) of #22 AWG wire; smaller gauges are limited by resistance.

Power wiring must be grounded at the screw and nut on the grounding plate inside the case.

Wiring Standalone Units

Ground the shield at the main control panel. Connect the shield wire to the “shield” terminal block. Tape all exposed shield wire at the sensor to insulate it from the enclosure.

• Electrical Power: 24 VDC/VAC nominal, 0.35 amp maximum. AC or DC can be connected.
• Output: 4-20 mA linear output from the sensor. Monitoring equipment may have a maximum impedance of 500 ohms.
• Circuit Board Connections: Power to J1, communication to J2, external devices (ventilators, strobes) to relay terminals J5 or J6.
• Relay Output: 2 DPDT relays, 5A @ 250VAC.

Wiring Diagrams:

• 3-Wire Current Sink Output (DC supply only)
• 4-Wire Current Sink Output
• 120 VAC Connection (transformer pre-wired under PCB)

Connecting a Remote to the Main Unit

Use #20-24 AWG shielded twisted pair cable (e.g., Belden 9841). Remote sensors should not exceed 200 ft (61 m) of #22 AWG wire. OUT1 and OUT2 connectors on the remote sensor are not used.

Wiring Network Units

Ensure minimum voltage requirements are respected.

User Interface

The E3Point® gas monitor features a 2-line, 8-character LCD screen for displaying readings and accessing programming/calibration functions.

• Enter key: Confirms selections and accesses programming menus.
• Escape key: Cancels modifications and exits menus.
• LCD screen: Shows real-time readings, including gas type, concentration (% or ppm), and sensor source (built-in or remote).
• Navigation controls: Increment/decrement values and scroll through menus.

LED Indicators

Detection Ranges and Alarm Levels

*Sensor exposure to gas concentration that may result in permanent damage to the sensor.

Limited Warranty

Honeywell Analytics, Inc. warrants its products to the original purchaser for one (1) year against defects in material or workmanship. Defective parts will be repaired or replaced free of charge if shipped prepaid to Honeywell Analytics. The product will be returned freight prepaid if the defect is due to faulty materials or workmanship. This warranty is Honeywell Analytics’ sole responsibility.

Re-Stocking Policy

A 15% re-stocking fee applies for returns within 1 month of shipping; 30% within 3 months. Full credit is issued for products in perfect working condition, less the re-stocking fee. Repair costs will be deducted if needed. No credit beyond three months.

Exclusions

Gas sensors have a twelve (12) month manufacturer's limited warranty. This warranty may be voided by excessive gas concentration exposure, misuse, negligence, or failure to operate according to instructions. Consumable items like batteries, lamps, fuses, valves, vanes, sensor elements, cartridges, or filter elements are not covered.

Warranty Limitation and Exclusion

Honeywell Analytics’ obligations are void if the product has been subject to abuse, misuse, negligence, or accident, or if the purchaser fails to follow instructions, or if the serial number is removed or altered.

Disclaimer of Unstated Warranties

The printed warranty is the only one applicable. All other warranties, express or implied (including merchantability or fitness for a particular purpose), are disclaimed.

Limitation of Liability

Honeywell Analytics’ liability shall not exceed the purchase price of the product. Honeywell Analytics is not liable for special, indirect, or consequential damages. No action may be brought more than one year after the cause of action has occurred.

Risk of electric shock