Section 120 3 requirements for pipe insulation the piping for all space conditioning and service water heating systems with fluid temperatures listed in table 120 3 a shall have the amount of insulation specified in subsection a or b.
Refrigerant piping insulation specification.
A checklist for each is provided below.
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They are warm to hot 110 f 43 3 c for air cooled.
Refrigerant piping insulation has historically escaped the scrutiny that it has found itself under recently in some jurisdictions.
8 2 2 insulation closed cell class o armaflex tubes with built in anti microbial protection shall be fitted to all pipework.
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Insulation conductivity shall be determined in accordance with astm c335 at the mean temperature listed in table 120 3 a and shall be rounded to the.
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How this information is used will be explained throughout the rest of this guide.
The insulation thickness shall be as follows.
Liquid lines generally are insulated.
The roof of a building at roof level or if they could be considered hot enough to pose a safety risk then insulation should be added.
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Refrigerant piping 10 07 note.
This guide specification covers the requirements for refrigerant piping systems inside of buildings or leading from equipment adjacent to buildings.
With energy codes getting stricter during each code cycle and some large lawsuits related to refrigerant piping being.
Here we describe defects in refrigerant piping insulation problems caused by defective refrigerant piping insulation recommended installation practices for refrigerant tubing insulation in building walls or cavities as well as outdoors where exposed to the weather and interior leaks on in wall below a split system air conditioner wall.
Product information model number of unit components condensing section evaporator etc.
Piping and fittings for refrigerant vapor suction lines shall be insulated with insulation having a thermal resistivity of at least r 3 and having external surface permeance not exceeding 0 05 perm 2 87 ng s m 2 pa when tested in accordance with astm e 96.
This section specifies field refrigerant piping for direct expansion hvac systems and associated drain and condenser water piping for walk in refrigerators and freezers including required pipe insulation.
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Refrigeration pipe size insulation thickness inch o d mm o d mm 1 4 6 3 6 3 8 9 5 and above 13 all joints shall be glued to ensure a vapour seal.
