Refrigeration
This type of refrigerant is commonly used in military HVAC systems due to its low environmental impact.
What is R-134a?
This unit measures the rate of electrical flow in a circuit.
What is amperage (amps)?
HVAC technicians use this type of wrench to tighten and loosen fittings in refrigeration systems.
What is an adjustable wrench?
This type of compressor is commonly used in small-scale military HVAC systems due to its simplicity and reliability.
What is a reciprocating compressor?
In troubleshooting HVAC systems, this common issue occurs when air filters become clogged, restricting airflow and reducing system performance.
What is a dirty air filter?
This phenomenon occurs when refrigerant changes from a liquid to a gas, absorbing heat in the process.
What is phase change?
Military HVAC systems often require this type of electrical connection to provide backup power during outages.
What is a generator?
HVAC technicians use this specialized tool to measure airflow velocity and volume in ducts and air handlers.
What is an anemometer?
Unlike reciprocating compressors, these types of compressors have rotating vanes to compress the refrigerant.
What is a rotary compressor?
In troubleshooting HVAC systems, this issue occurs when the blower motor fails to start, resulting in poor airflow.
What is a faulty capacitor or motor starting component?
In refrigeration systems, this device is used to regulate the flow of refrigerant between the condenser and the evaporator.
What is an expansion valve?
This electrical component in an HVAC system regulates the operation of the compressor
What is a contactor ?
This specialized tool/part is used to measure the level of refrigerant in a system's receiver or accumulator tank.
What is a refrigerant sight glass?
Military-grade HVAC systems often incorporate this type of compressor, known for its high efficiency and low maintenance.
What is a scroll compressor?
When troubleshooting compressor issues, this condition occurs when the compressor motor overheats and shuts down.
What is compressor overload?
This phenomenon occurs in refrigeration systems when moisture freezes on the surface of the evaporator coil, reducing heat transfer efficiency.
What is coil icing or frost buildup?
This specialized electrical test instrument is used to measure the capacitance of capacitors in HVAC systems.
What is a capacitance meter?
HVAC technicians use this advanced tool to analyze the performance of variable air volume (VAV) boxes and optimize airflow distribution in buildings.
What is a VAV airflow hood or capture hood?
This condition occurs in compressors when the refrigerant vapor is not properly compressed, leading to reduced efficiency
What is liquid slugging?
When troubleshooting HVAC systems, this complex issue occurs when airflow across the evaporator coil is restricted, leading to reduced heat transfer efficiency and potential compressor damage.
What is evaporator coil fouling or airflow restriction?
In military HVAC systems, this component is responsible for removing moisture from the refrigerant before it enters the compressor, preventing liquid slugging and compressor damage.
What is a liquid line filter drier?
In military installations, HVAC systems are often integrated with this type of advanced control system to optimize energy efficiency.
What is a Building Automation System (BAS)?
This instrument is used to measure the electrical current flowing in a circuit
What is an ammeter?
In military HVAC systems, this device is often used to protect compressors from excessive pressure buildup.
What is a pressure relief valve?
This problem arises in military HVAC systems when the control board fails to communicate with peripheral devices, resulting in system malfunctions.
What is a communication failure or control board malfunction?