Understanding Refrigerant Pressure Gauges

Front

What does the compound pressure gauge measure on the low side of a system?

Back

Low-side pressure in psig and vacuum in inches of mercury (Hg)

Front

What is the typical range for most high-pressure gauges?

Back

0 to 800 psig

Front

What is the purpose of the center port on a manifold?

Back

For recovery, evacuation, and charging connections

Front

What additional feature might an electronic manifold have? Options: Built-in refrigerant storage, Combined temperature probes for calculating system superheat and subcooling, Automatic refrigerant recycling, Integrated vacuum pump

Back

Combined temperature probes for calculating system superheat and subcooling

Front

What does the EPA recommend for hoses to minimize refrigerant loss? Options: Use of high-pressure hoses, Use of low-loss fittings or valves that close automatically or manually, Use of longer hoses, Use of hoses with larger diameters

Back

Use of low-loss fittings or valves that close automatically or manually

Front

What is considered a de-minimis release of refrigerant?

Back

A minor release when connecting or disconnecting hoses for service or recovery

Front

What is the legal status of a de-minimis release of refrigerant?

Back

It is considered lawful.

Front

What is the primary function of low-loss fittings on hoses?

Back

To minimize refrigerant loss

Front

Which color is usually associated with the center port hose on a manifold?

Back

Yellow

Front

What is the main purpose of using a manifold in refrigeration systems?

Back

To measure and control refrigerant pressures