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Air Conditioning

Air Conditioning. International Mechanical Code Relating to Refrigeration. International Mechanical Code. IMC is broken down into chapters and sections. The chapters and sections are in numerical order.

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Air Conditioning

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  1. Air Conditioning International Mechanical Code Relating to Refrigeration

  2. International Mechanical Code • IMC is broken down into chapters and sections. • The chapters and sections are in numerical order. • You will need to quickly find the information you are looking for when you go for your S2 license.

  3. International Mechanical Code • IMC encompasses General Regulations, Ventilation, Exhaust Systems, Duct Systems, Combustion Air, Chimneys and Vents, Specific Appliances, Fire Places and Solid Fuel Burning Equipment, Boilers, Water Heaters, and Pressure Vessels, Refrigeration, HydronicPiping, Fuel oil Piping, Fuel Oil Storage and Solar Systems.

  4. Chapter 11 Refrigeration • Section 1101 General information • 1101.1 Scope This chapter governs the design, installation, construction and repair of refrigeration systems that vaporize and liquefy a fluid during the refrigerating cycle. Refrigerant piping design and installation, including pressure vessels and pressure relief devices, shall conform to this code.

  5. Chapter 11 Refrigeration • 1101.2 Factory Built Equipment • Factor built equipment meeting UL (Underwriters Laboratories) requirements and are self contained, are considered to meet code if installed and serviced in accordance with manufactures directions.

  6. Chapter 11 Refrigeration • 1101.3 Protection • All components of a refrigeration system that is subject to physical damaged must be protected in an approved manner.

  7. 1101.3 Protection • Bollards

  8. Chapter 11 Refrigeration • 1101.4 Water Connections • Water connections to a refrigeration system must be made in accordance with this code and the International Plumbing Code.

  9. Chapter 11 Refrigeration • 1101.5 Fuel Gas Connections • Fuel gas connections for refrigeration systems must be made in accordance with International Fuel Gas Code as well as International Mechanical Code.

  10. Chapter 11 Refrigeration • 1101.7 Maintenance • Mechanical refrigeration systems must be maintained in proper operating conditions and free from excessive oil, dirt, waste, excessive corrosion, other debris and leaks.

  11. 1101.7 Maintenance • Dirty Ice Machine

  12. 1101.7 Maintenance • Poor location for this condensing unit

  13. Chapter 11 Refrigeration • 1102.2 Refrigerants. The refrigerant shall be for which the equipment or appliance was designed to utilized or converted to utilize. • 1102.2.1 Mixing. Refrigerants, including refrigerant blends, with different designations in ASHRAE 34 shall not be mixed in a system.

  14. Chapter 11 Refrigeration • 1102.2.2.2 Recovered refrigerants Refrigerant recovered from a system shall not be reused in any other than the system from which they were recovered. Recovered refrigerant shall be filtered and dried before reuse.

  15. Chapter 11 Refrigeration • Section 1103 Refrigeration System Classification • 1103.1 Refrigerant Classification • See ASHRAE table 1103.1 • 1103.2 Occupancy Classification is as follows:

  16. Chapter 11 Refrigeration Institutional occupancy is described as a premises where people are disabled, debilitated or confined and cannot leave the premises on their own. Public Assembly Occupancyis a premises where large numbers of people congregate. Residential Occupancyis premises that supplies the occupants complete independent living.

  17. Chapter 11 Refrigeration Commercial Occupancy is a premises wherepeopletransact business, receive personal service or purchase food or other goods Industrial Occupancyis a premises not open to the public, where access by authorized persons is controlled and is used to manufacture, process or store goods.

  18. Chapter 11 Refrigeration • Section 1104 System Application Requirements • 1104.1 General • 1104.2 Machinery Rooms and the amount of refrigerant quantities allowed • 1104.3 – 1104.4.3 lists quantities of refrigerant allowable in certain spaces.

  19. Chapter 11 Refrigeration • Section 1105 Machinery Room, General Requirements • 1105.1 Design and Construction • 1105.2 Openings • 1105.3 Refrigerant Detectors • As required by the International Fire Code

  20. Chapter 11 Refrigeration • 1105.4 Tests • Mechanical Ventilation as required by the code official • 1105.5 Fuel Burning Equipment

  21. Chapter 11 Refrigeration • 1105.6 Ventilation • Machinery rooms need to be ventilated • 1105.7 Termination of Pressure Relief Devices

  22. Chapter 11 Refrigeration • Section 1106Machinery Room, Special requirements • 1106.6 Emergency signs and labels. Refrigeration units and systems shall be provided with approved emergency signs and labels

  23. Chapter 11 Refrigeration • Section 1107 Refrigeration Piping • 1107.1 General All refrigerant piping shall be installed, tested and placed in operation in accordance with this chapter. • 1107.2 Pipe enclosures Rigid or flexible enclosures or pipe ducts shall be provided for soft, annealed copper tubing used for refrigerant piping.

  24. Chapter 11 Refrigeration • 1107.3 Condensation • All refrigerant piping and fittings, that, during normal operation, will reach a surface temperature below the dew point of the surrounding air shall be protected in a manner to prevent damage.

  25. Chapter 11 Refrigeration • 1107.4 Materials for refrigerant piping • 1107.4.1 Steel Pipe • 1107.4.2 Copper and Brass Pipe • 1107.4.3 Copper Tube • Copper tube used for refrigeration piping shall be seamless copper tube of type ACR

  26. Chapter 11 Refrigeration • 1107.4.4 Copper tubing Joints • 1107.4.5 Aluminum Tube • 1107.5 Joints and Refrigerant containing parts in air duct • 1107.6 Exposure of refrigerant pipe joints • 1107.7 Stop Valves • 1107.7.1 Liquid Receivers

  27. Section 1107 Refrigeration Piping • The photo’s you are about to see are an examples of poor installations and why we have building codes.

  28. Section 1107 Refrigeration Piping

  29. Section 1107 Refrigeration Piping

  30. Section 1107 Refrigeration Piping

  31. Section 1107 Refrigeration Piping

  32. Section 1107 Refrigeration Piping

  33. Chapter 11 Refrigeration • Section1108 Field Test • 1108.1 General. Every refrigerant containing part of every system that is erected on the premises shall be tested and proved tight after completion of the installation and before operation. • As with many of these regulations there are exceptions.

  34. Chapter 11 Refrigeration • 1108.2 Test gases. Test shall be made with an inert dried gas. Nitrogen or Carbon Dioxide are examples • Oxygen, air, combustible gases and mixtures containing such gases shall not be used

  35. Chapter 11 Refrigeration • 1108.3 Test Apparatus. The means used to build up the test pressure shall either a pressure limiting device or a pressure reducing device and a gauge and outlet.

  36. Notes on Code • International Mechanical Code is used in Connecticut. • The BOCA code is used in MA. • Each town or municipality has the right to add requirements to the code. • Remember EPA requirements as well.

  37. Notes on Code • The CT licensing exam is open book and you will be given a list of code books to bring. Make sure you have the correct version. • Current CT code is IMC2003. • Update your code books every time a new version comes out.

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