i need to fix some tubing connection that were soldered . can i silver solder over them with out removing or replacing them . working close to evap coil and cant shorten tube anymore . any ideas ?
HVAC Doc said:Make sure there is no refrigerant in the system. Clean the connections thoroughly as I assume when you say solder you are talking they were soft soldered (like plumbing). Make sure that when you braze in the new connections it flows evenly around the joints. It may even require cutting out the old joint and using a new coupling to attach the two pieces. Evacuate the system and it probably would not be a bad idea to install a filter drier into the system as well while you have it open.
Yeah, by that time all of the soft solder will be inside the system due to capillary action ... where it should not be.HVAC Doc said:Actually if you clean the connection good, by the time you hit it with the oxy/acet torch and get the joint hot enough for stick braze, there won't be much (if any) of the soft solder left.
Depends on your skills with a torch. If you are a novice and not a professional and used to making good clean joints, I wouldn't recommend attempting it like HDoc said. But if you have many years of brazing under your belt and know how to control your torch, heat, and flame direction a pro can have the new joint brazed before any of the others get soft.Unregistered said:Yeah, by that time all of the soft solder will be inside the system due to capillary action ... where it should not be.