J175 Theory

List four (4) typical self-contained hydrocarbon system types

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Hydrocarbons will only ignite when within a ____% to _____% mixture with air or oxygen.

List four sources of ignition applicable to Hydrocarbon refrigerants.

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Acts and Regulations are legal documents produced by _______________ and _____________ governments to protect the individual members of their societies.

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List four types of compressor lubricants that can be used with Hydrocarbon refrigerants

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What special precautions must be taken when servicing self-contained hydrocarbon system?

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List below the design operating pressures of a R600a frost free refrigerator with design evaporation temperature of -23°C and a design condensing temperature of 45°C.

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What safety precautions must be undertaken when disposing of compressor lubricant from a Hydrocarbon system?

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List three acceptable methods of removing a Hydrocarbon refrigerant from a system and the safety precautions required for each method

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What gas is used to “Flush” a Hydrocarbon system after the Hydrocarbon refrigerant has been removed and explain why flushing is required.

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