Скачать или смотреть HVAC Quick Reference Cards for Refrigerant Charging and Troubleshooting!

In this HVAC Training Video, I Explain how our HVAC Quick Reference Cards can be used while Refrigerant Charging and Troubleshooting! I go over the 6 sides of the 3 cards to discuss what is included. These cards are made from flexible polystyrene and are 5.625" high by 8.85" wide. These polystyrene cards compliment the book and can be used as an easy and quick reference in the field!

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The 3 Pack of Quick Reference Cards:
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These three HVAC quick reference polystyrene cards are double-sided and designed to be used with Single and Two Speed Air Conditioners and Heat Pumps to measure the refrigerant level in a unit, charge refrigerant, troubleshoot refrigerant-based problems, and measure heat transfer to determine if there is a problem during cooling mode.

The Cards are each 5.625" by 8.85" and are made from Flexible Weather and UV Resistant Polystyrene. The print job and cards have been tested from 0°F-130°F. The cards have also been tested with exposure to common refrigerant oils.

The Cards Contain the Following:
-Finding the Target Subcooling for Systems with a TXV Metering Device

-Initial Steps Before Measuring the Refrigerant Charge with Subcooling
-Measuring Subcooling to Determine if a System is Undercharged, Correctly Charged, or Overcharged

-Example of System Measurement Locations for Measuring Subcooling

-Finding the Target Superheat for Systems with a Fixed Orifice Metering Device

-Initial Steps Before Measuring the Refrigerant Charge with Total Superheat
-Measuring Total Superheat to Determine if a System is Undercharged, Correctly Charged, or Overcharged


-Example of System Measurement Locations for Measuring Superheat


-Measuring Delta T and Determining if the Temp Drop is Correct
-P/T Chart for R-22, R-410A, R-407C, R422B (NU22B), and R438A (MO99)
-Instructions for Finding the Sat Temp of R-22 and R-410A
-Instructions for Finding the Dew and Bubble Sat Temps of Blend Refrigerants

-Refrigerant Weight Per foot Chart
-Instructions for Adding the Full Amount of Refrigerant needed
-Instructions for Adding Refrigerant into a Running System
-Example for Determining the Correct Amount of Refrigerant Needed in an Off, Empty, and Vacuumed Split System


-Troubleshooting Guide for Systems with a Fixed Orifice or TXV
-Use Measurements such as Superheat, Subcooling, Delta T, Vapor Sat Temp, Liquid Sat temp, Compressor Amps to Determine the Problem.
-Use the Guide to Determine Problems such as a Liquid Line Restriction, Low Indoor Airflow, Contaminated
Refrigerant, Low Outdoor Unit Airflow, Undercharged, Overcharged, TXV Bulb Charge Lost, Detached or Uninsulated
TXV Bulb, Weak Compressor Valves, Reversing Valves Bleeding across the Tubes.

-Step by Step Guide for Troubleshooting a Frozen Evap Coil on an Air Conditioner or Heat Pump in Cooling Mode.
-Instructions to Determine if the Problem is a Low Refrigerant Charge, Low Airflow, or a Liquid Line Restriction.
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