Once you have the manual, focus on these chapters. Here is a summary of the most critical information.
Modern variations of the 6G40-36F1 utilize a standard thermopile/piezoelectric system or a gas control valve (like a Honeywell or Robertshaw unit). How to Light the Pilot (Standard Gas Valve Variant) richmond water heater model 6g40-36f1 manual
Based on documentation for the Essential series, the 6G40-36F1 (and similar models like the 6G40-36F3) generally adheres to these specifications: Tank Capacity: 40 Gallons. BTU Rating: 36,000 BTU/hr. Energy Efficiency: 0.58 Uniform Energy Factor (UEF). Recovery Rate: Approximately 36.4 gallons per hour at a Dimensions: Once you have the manual, focus on these chapters