HVAC Troubleshooting
HVAC Troubleshooting Data Form
Subcooling Method of Refrigerant Charging
Superheat Method of Refrigerant Charging
AC Troubeshooting Guide – Basic System Analysis
Procedure for Starting a Compressor the First Time
Kickstart Connection Diagram
Sensor Resistance vs. Temperature (for York & Coleman Thermistors)
Flow of Gas Through Fixed Orifices
Measuring Gas Input (Natural Gas)
Formulas – Cooling Capacity
Formulas – Heating Capacity
Enthalpy vs Wetbulb (Total heat content – BTU per lb. of air)
York Equipment Information
York Fault Code Quick Reference Chart
Unit Control Board Flash Codes -- York Simplicity Controls (Commercial HVAC Controls)
Fossil Fuel Relay – Heat Pumps with York Guard V
Fossil Fuel Relay – Heat Pumps without York Guard V
Psychrometric Charts
Use of Psychrometric Chart
Low Temperature Psychrometric Chart (-40 to 50 F)
Medium Temperature Psychrometric Chart (-32 to 130 F)
HVAC Refrigerant Properties and Applications
Refrigerant Application Summary
Refrigerant Properties Summary
Pressure/Temperature Chart
HVAC Refrigerant Line Sizing
Refrigerant Line Sizing Chart for AC – R-22
Additional Refrigerant Charge Required for Piping – R-22
General Piping Recommendations
