Static Pressure
This is the pressure air exerts on duct walls when it is not moving.
What is static pressure?
This unit of measurement is commonly used to desccribe how much air an HVAC system moves.
What is CFM (Cubic Feet per Minute)?
In this mode, the indoor coil acts as the evaporator.
What is cooling mode?
This voltage level is considered low voltage in HVAC systems.
What is 24 volts?
This gas must be flowed while brazing.
What is nitrogen?
Static pressure is measured using this unit.
What is inches of water column (in. w.c.)?
This component of the system is responsible for moving air through the ductwork.
What is the blower (or fan)?
The reversing valve solenoid typically operates on this voltage.
What is 24 volts?
Most residential HVAC control circuits operate on this type of current.
What is AC (alternating current)?
These two copper lines connect the indoor and outdoor units.
What are the liquid line and suction line?
High static pressure can lead to this coil condition in cooling mode.
What is coil freeze-up?
How much airflow in CFM per ton is recommended for most residentials systems.
This tool is used to check if the solenoid coil is energized.
What is a multimeter?
This terminal supplies 24 volts from the transformer to the thermostat
What is R?
Installing a condenser too close to walls can cause this issue.
What is poor airflow or overheating?
This type of pressure exists when air is being pushed by the blower.
What is positive static pressure?
This tool is used to measure air velocity or airflow at a register or grille
What is an anemometer?
The reversing valve should be brazed while flowing this gas.
What is nitrogen?
This component protects the control board from shorts.
What is a low-voltage fuse?
Improper wire sizing can cause this condition.
What is overheating?
This type of pressure exists on the return side of the system.
What is negative static pressure?
This condition occurs when too little air passes over the evaporator coil and causes coils to freeze up.
What is low airflow/dirty filters?
This condition can prevent the valve from shifting properly.
What is low refrigerant pressure?
This component uses low voltage to control high-voltage power to the condenser.
What is a contactor?
Undersized ducts lead to this system problem.
What is high static pressure?