Appleton EYS26 3/4 EYS Sealing Unilet-Female Instruction Manual

1. Introduction

This manual provides essential information for the proper installation, operation, and maintenance of the Appleton EYS26 3/4 EYS Sealing Unilet-Female. This product is designed for use in hazardous locations to prevent the passage of gases, vapors, or flames from one portion of the electrical conduit system to another. Adherence to these instructions is crucial for safe and effective performance.

2. Safety Information

WARNING: Read and understand all instructions before installing or operating this product. Failure to follow these instructions may result in serious injury, death, or property damage.

• Installation must be performed by qualified personnel in accordance with all applicable national and local electrical codes.
• Ensure power is disconnected before installation or maintenance.
• Use only approved sealing compound and fiber damming material as specified by Appleton.
• Do not modify the product in any way.
• Verify the product is suitable for the specific hazardous location classification.

3. Product Overview

The Appleton EYS26 is a 3/4 inch female sealing unilet, constructed from durable iron. It is designed to be installed in conduit runs to create a seal that prevents the migration of flammable gases, vapors, or flames through the conduit system, which is critical in hazardous environments. The unilet features a threaded female connection for secure attachment to conduit and a sealing chamber for the compound.

Figure 1: Appleton EYS26 3/4 EYS Sealing Unilet-Female. This image shows the grey iron body of the unilet with a threaded male connection at the top and a female connection at the bottom (not fully visible). A side opening with a square recess for a plug is visible, indicating the sealing compound fill port.

4. Setup and Installation

Proper installation is paramount for the safety and functionality of the sealing unilet. Always refer to local and national electrical codes (e.g., NEC Article 501 for Class I locations) for specific requirements.

4.1 Materials Required

• Appleton EYS26 Sealing Unilet
• Approved sealing compound (e.g., Appleton Chico A or similar)
• Approved fiber damming material (e.g., Appleton Chico X or similar)
• Standard plumbing tools (wrenches, pipe thread sealant)

4.2 Installation Steps

1. Prepare Conduit: Ensure conduit ends are clean, free of burrs, and properly threaded.
2. Thread Unilet: Apply appropriate pipe thread sealant to the male threads of the conduit and thread the EYS26 unilet onto the conduit. Tighten securely to ensure a proper electrical and mechanical connection.
3. Install Damming Material: Insert the fiber damming material into the conduit opening within the sealing unilet. This material prevents the sealing compound from flowing into the conduit system. Ensure the damming material is packed firmly to create a solid barrier.
4. Mix Sealing Compound: Prepare the sealing compound according to the manufacturer's instructions. This typically involves mixing a powder with water to form a pourable slurry.
5. Pour Sealing Compound: Carefully pour the mixed sealing compound into the sealing chamber of the unilet through the side opening. Fill the chamber completely until the compound is flush with the opening.
6. Insert Plug: Immediately after filling, insert and tighten the sealing plug into the side opening.
7. Cure Time: Allow the sealing compound to cure for the time specified by the manufacturer before energizing the circuit.

5. Operation

The Appleton EYS26 Sealing Unilet operates passively as a critical safety component within a hazardous location electrical conduit system. Once properly installed and sealed, its function is to prevent the passage of flammable gases, vapors, or flames through the conduit. It requires no active user interaction after installation. Its integrity relies on the correct application of the sealing compound and proper installation.

6. Maintenance

Regular inspection of the sealing unilet is recommended to ensure its continued integrity and compliance with safety standards.

• Visual Inspection: Periodically inspect the unilet for any signs of physical damage, corrosion, or cracks in the sealing compound.
• Environmental Factors: Ensure that the surrounding environment has not changed in a way that would compromise the unilet's rating or integrity.
• Cleaning: Clean the exterior of the unilet as needed using methods appropriate for the hazardous location and material (iron). Avoid using harsh chemicals that could degrade the material.
• Re-sealing: If the seal is compromised or the unilet is removed for any reason, it must be re-sealed with new damming material and sealing compound according to the installation instructions.

7. Troubleshooting

Most issues with sealing unilets relate to improper installation or damage.

• Issue: Visible cracks or gaps in the sealing compound.
  Solution: This indicates a compromised seal. The unilet must be re-sealed immediately. Disconnect power, remove the old compound, and follow the installation steps for re-sealing.
• Issue: Loose connections or corrosion at conduit threads.
  Solution: Disconnect power. Inspect and clean threads. Reapply pipe thread sealant and tighten connections securely. If corrosion is severe, replace the affected components.
• Issue: Unilet not suitable for the environment.
  Solution: Verify the hazardous location classification and ensure the EYS26 is rated for that specific environment. If not, replace with an appropriately rated fitting.

8. Specifications

9. Warranty and Support

For specific warranty information regarding your Appleton EYS26 Sealing Unilet, please refer to the documentation provided at the time of purchase or contact Appleton directly. Warranty terms typically cover defects in materials and workmanship under normal use.

For technical support, product inquiries, or to locate an authorized distributor, please visit the official Appleton website or contact their customer service department. When contacting support, please have your product model number (EYS26) and any relevant purchase information available.