If liquid lines pass through a space that is warmer than the refrigerant i e.
Refrigerant piping insulation specification.
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.
Adhere to ufc 1 300 02 unified facilities guide specifications ufgs format standard when editing this guide specification or preparing new project.
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It is the ideal choice for insulating mechanical piping systems.
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.
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.
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Liquid lines generally are insulated.
Refrigerant pipe pipe gage thermometer oil separator last modified by.
This guide specification covers the requirements for refrigerant piping systems inside of buildings or leading from equipment adjacent to buildings.
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.
How this information is used will be explained throughout the rest of this guide.
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.
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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.
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.
They are warm to hot 110 f 43 3 c for air cooled.
The insulation thickness shall be as follows.
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Refrigerant piping 10 07 note.
A checklist for each is provided below.
