HVAC Quick Reference Cards for Refrigerant Charging and Service Procedures for Air Conditioning,Reference Tool Guide Chart Sheets for HVAC Techs Troubleshooting and Diagnosing Issues

The contents are as follows: Pg1. Comprehensive P/T chart with all common refrigerants. Pg2. R22/410 comparison chart, superheat/subcool calculation, charging quick reference. Pg3. Troubleshooting matrix, emergency/safety procedures. Pg4. Engineering/HVAC formulas. Pg5/6. Maintenance procedures. Pg7. EPA Certification study guide. Pg8. Heat pump diagrams, standard 24v thermostat pinout chart, diagnostic chart.

These 4 double-sided laminated cards are engineered for HVAC professionals and technicians who need fast, reliable field reference. Pressure-temperature charts for all common refrigerants, charging procedures, diagnostic flowcharts, and maintenance checklists are printed on weather-resistant material that withstands damp basements, rooftops, and high-humidity job sites.

Compact design fits easily into tool bags with pre-drilled holes for binding or keychain attachment. No more flipping through manuals on the clock—critical data like P/T conversions, superheat/subcool calculations, and troubleshooting sequences are instantly accessible. Essential for EPA certification prep, routine diagnostics, and reducing on-the-job errors.

Trusted by residential and commercial HVAC techs alike. New technicians benefit from structured reference material; experienced pros use them to streamline service calls and save billable time.