What does G mean in HVAC?
G: This wire controls the blower fan, which is responsible for pushing the warm or cool air through all the vents in your house. It is not a ground wire! C: This stands for the “common” wire in an HVAC system, and it provides power to the thermostat.
What is HTD in HVAC?
HTD – Heated. HTG – Heating. HTR – Heater. HVAC – Heating Ventilation and Air Conditioning. HW – Hot water.
How do AC’s make air cold?
The filtered, warm indoor air then passes over cold evaporator coil. As the liquid refrigerant inside the evaporator coil converts to gas, heat from the indoor air is absorbed into the refrigerant, thus cooling the air as it passes over the coil.
How long do air handling units last?
In general, most HVAC systems will last from 15 to 25 years, but depending on the type of system and other contributing factors, that estimate can be highly variable.
What does FP mean on air conditioner?
The code “FP” indicates the system is in Freeze Protection mode. Freeze protection mode is activated when the thermostat or thermistor detects temperatures below 40 ℉. This keeps the essential elements from freezing and causing damage.
What does G mean on a thermostat?
G: The G terminal controls the fan relay and is responsible for turning the blower fan on and off automatically or manually via the thermostat. RC: The RC terminal is the 24-volt cooling power supply.
What is cod in HVAC?
The COD Service Technician is responsible for diagnosing and repairing HVAC equipment failures and customer home comfort issues.
Does AC mean cold air?
Your air conditioner does not “create” cold air, it removes heat from warm air. Your air conditioner has three main mechanical components to cool your home: A compressor (a pump that pressurizes the refrigerant) An evaporator coil (inside cold coil)
Why does Freon get cold?
When the Freon gas is compressed, its pressure rises, making it very hot. Next, the hot Freon gas moves through a series of coils, which has the effect of lowering its heat and converting it to liquid. The Freon liquid then flows through an expansion valve, which causes it to cool down until it evaporates.
What is Mr Cool FP mode?
So, like on a MrCool Mini Split remote you will see a button that says “FP” and what that stands for is Freeze Protection. Basically if you’re going to be gone for a while and you just want to keep the place where the unit is from freezing, you want to keep the pipes warm, you put it in FP mode.