MIZUDO Tankless Hot Gas Water Heater

Introduction

This manual provides essential information for the safe and efficient installation and operation of MIZUDO Tankless Hot Gas Water Heaters, specifically models FDG-CS90 and FDG-CS120. It covers critical safety warnings, detailed installation steps, operational procedures, maintenance guidelines, and troubleshooting tips to ensure optimal performance and longevity of the unit.

Key Features

• Comprehensive safety guidelines and definitions.
• Detailed explanation of the water heater's function and components.
• Step-by-step installation instructions, including required tools and materials.
• Guidance on proper venting, combustion air supply, and gas/water connections.
• Operation instructions for safe and effective use.
• Troubleshooting section with error codes and remedies.
• Maintenance procedures for optimal performance and lifespan.
• Wiring diagrams for electrical connections.

Important Safety Information

Always read and follow all safety instructions carefully before installation and operation. Failure to comply with these instructions can result in fire, explosion, property damage, serious injury, or death.

This manual must remain with the product. Ensure all installation and service are performed by qualified professionals.