I am working on a building which was exposed to a fire in an adjacent structure. The HVAC equipment looks fine. No visual signs of burned parts, no warping of metal or plastics, wiring looks fine, no soot accumulation on or inside of the unit, condenser and evaporator coils and fins look fine. The machines use R22 refrigerant.
The question has been raised as to whether high temperatures from the fire could have caused issues with the refrigerant and oil. What temperature would damage the machine? What is the best method for testing if the refrigerant is still re-usable, and if not, what procedures need to be followed to evacuate and clean the refrigerant circuit for refrigerant replacement?
Any thoughts would be most appreciated.
I think that if there is no signs of heat damage to the housing and other stuff then there is also no damage to the Freon/oil. What temp does ref oil start to be damaged at? What temp kills the oil? All you service guys should know that!
This post was edited by an admin on July 26, 2013 5:07 AM.
I would be concerned about any soldered connections on unit, most fires reach well over 1000 deg F. some solders have a melting point between 750 -1100 deg.F. Some carrier units had a fusible plug on the suction line set to blow if temp./press. got to high. There are several products to check condition of refrig. oil. also any residual smoke smell may be trapped in unit and duct insulation You should have a visual inspect. by a pro.