Gas Trade: Unit 16 - Domestic gas-fired refrigerators
CSA Group's 2020 Gas Trade materials reference the Red Seal Program's trade outlines for your preparation to become a nationally recognized gasfitter. Please visit the Red Seal Program's website for more details.
Because recreational vehicles are often without access to the 120 V electrical power needed to run the compressors found in standard mechanical refrigerators, propane refrigerators traditionally have been used. In recent years, however, in the search for alternatives to electrically powered refrigeration, gas-fired units are gaining popularity because of:
• increased demand from users off the electrical grid;
• the cost of electricity needed to operate vapour compression refrigerators; and
• increased sales and use of RVs.
Gas-fired refrigerators operate on an absorption principle according to which refrigerant is circulated through three circuits where it absorbs heat from the refrigerator and freezer compartments and cools the evaporator fins. This system has no moving parts and is noiseless and continuous. A number of models can operate on a single propane flame, 12 V or 120 V circuits.
At the end of this unit, you will be able to:
• Describe the operation of a domestic gas-fired refrigerator;
• Describe the installation procedures for a domestic gas-fired refrigerator; and
• Describe the service and maintenance procedures for a domestic gas-fired refrigerator.
The 7th Edition of the Training materials are revised to include the following changes:
• Updated to current standards and codes.
• Updated assignment questions and added chapter numbers.
• Assignment questions now included at the end of each chapter.
• New preface with a listing of standards and codes referenced in each module.