Superheat & Subcooling: Readings vs Targets for TXV and Piston Systems
This lesson is part of the course
In this lesson
You calculate superheat and subcooling from six service readings, compare the right one with the target for each metering device and flag each unit as OK, High or Low.
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Lessons in this course
- HVAC Units: BTU/h, Tons, kW and °F/°C (incl. ΔT) Locked
- Conduction Heat Loss: U × A × ΔT for Walls, Windows, Doors & Ceiling Locked
- Infiltration & Ventilation Load: CFM × 1.08 × ΔT and the Latent 0.68 Factor Locked
- Room-by-Room Load Summary, BTU per ft² & Equipment Size in Tons Locked
- Airflow: 400 CFM per Ton, Room CFM by Load Share & Register Count (Chart) Locked
- Duct Sizing: Area = CFM ÷ FPM, Round Diameter & Velocity Check Locked
- Superheat & Subcooling: Readings vs Targets for TXV and Piston Systems Locked
- Efficiency & Operating Cost: SEER, EER, COP and Annual Savings (Chart) Locked