1 Air Conditioning International Mechanical Code Relating to Refrigeration

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Air ConditioningAir Conditioning

International Mechanical Code Relating to Refrigeration

2International Mechanical Code

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.

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International Mechanical CodeInternational 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, Hydronic Piping, Fuel oil Piping, Fuel Oil Storage and Solar Systems.

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, Hydronic Piping, Fuel oil Piping, Fuel Oil Storage and Solar Systems.

4Chapter 11 Refrigeration

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.

• 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.

5Chapter 11 RefrigerationChapter 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.

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Chapter 11 RefrigerationChapter 11 Refrigeration

1101.3 Protection All components of a refrigeration

system that is subject to physical damaged must be protected in an approved manner.

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1101.3 Protection1101.3 Protection

• Bollards• Bollards

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Chapter 11 RefrigerationChapter 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.

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Chapter 11 RefrigerationChapter 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.

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Chapter 11 RefrigerationChapter 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.

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1101.7 Maintenance1101.7 Maintenance

• Dirty Ice Machine• Dirty Ice Machine

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1101.7 Maintenance1101.7 Maintenance

• Poor location for this condensing unit• Poor location for this condensing unit

13Chapter 11 RefrigerationChapter 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.

• 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.

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Chapter 11 RefrigerationChapter 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.

• 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.

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Chapter 11 RefrigerationChapter 11 Refrigeration

• Section 1103 Refrigeration System Classification–1103.1 Refrigerant Classification• See ASHRAE table 1103.1

–1103.2 Occupancy Classification is as follows:

• Section 1103 Refrigeration System Classification–1103.1 Refrigerant Classification• See ASHRAE table 1103.1

–1103.2 Occupancy Classification is as follows:

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Chapter 11 RefrigerationChapter 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 Occupancy is a premises where large numbers of people congregate.

Residential Occupancy is premises that supplies the occupants complete independent living.

Institutional occupancy is described as a premises where people are disabled, debilitated or confined and cannot leave the premises on their own.

Public Assembly Occupancy is a premises where large numbers of people congregate.

Residential Occupancy is premises that supplies the occupants complete independent living.

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Chapter 11 RefrigerationChapter 11 Refrigeration

Commercial Occupancy is a premises where people transact business, receive personal service or purchase food or other goods

Industrial Occupancy is a premises not open to the public, where access by authorized persons is controlled and is used to manufacture, process or store goods.

Commercial Occupancy is a premises where people transact business, receive personal service or purchase food or other goods

Industrial Occupancy is a premises not open to the public, where access by authorized persons is controlled and is used to manufacture, process or store goods.

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Chapter 11 RefrigerationChapter 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.

• 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.

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Chapter 11 RefrigerationChapter 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

• 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

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Chapter 11 RefrigerationChapter 11 Refrigeration

–1105.4 Tests

•Mechanical Ventilation as required by the code official

–1105.5 Fuel Burning Equipment

–1105.4 Tests

•Mechanical Ventilation as required by the code official

–1105.5 Fuel Burning Equipment

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Chapter 11 RefrigerationChapter 11 Refrigeration

–1105.6 Ventilation

•Machinery rooms need to be ventilated

• 1105.7 Termination of Pressure Relief Devices

–1105.6 Ventilation

•Machinery rooms need to be ventilated

• 1105.7 Termination of Pressure Relief Devices

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Chapter 11 RefrigerationChapter 11 Refrigeration

• Section 1106 Machinery Room, Special requirements

• 1106.6 Emergency signs and labels. Refrigeration units and systems shall be provided with approved emergency signs and labels

• Section 1106 Machinery Room, Special requirements

• 1106.6 Emergency signs and labels. Refrigeration units and systems shall be provided with approved emergency signs and labels

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Chapter 11 RefrigerationChapter 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.

• 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.

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Chapter 11 RefrigerationChapter 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.

–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.

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Chapter 11 RefrigerationChapter 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

–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

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Chapter 11 RefrigerationChapter 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

• 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

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Section 1107 Refrigeration PipingSection 1107 Refrigeration Piping

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

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

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Section 1107 Refrigeration PipingSection 1107 Refrigeration Piping

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Section 1107 Refrigeration PipingSection 1107 Refrigeration Piping

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Section 1107 Refrigeration PipingSection 1107 Refrigeration Piping

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Section 1107 Refrigeration PipingSection 1107 Refrigeration Piping

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Section 1107 Refrigeration PipingSection 1107 Refrigeration Piping

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Chapter 11 RefrigerationChapter 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.

• 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.

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Chapter 11 RefrigerationChapter 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

• 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

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Chapter 11 RefrigerationChapter 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.

–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.

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Notes on CodeNotes 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.

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Notes on CodeNotes 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.