You explained this so succinctly. I work maintenance on a facility with 40+ WSHPs in the ceiling, over half of which are tripping out on high condenser water temps. This is about to be my next weeks' worth of work. Thank you for making this video!
The GPM should be on the data tag of the unit for what the coaxial heat exchanger is rated for. When backflushing, you are typically using the system water pressure that was already going through the heat exchanger, but you are reversing the flow. If using the existing system water, there should be no concerns.
You asked for questions, so here it is... Is it ever feasible to replace the coaxial heat exchanger if it becomes compromised? (I have an older unit that is otherwise operational and would like to put it back in service.)
Yes you can change the coaxial coil. I would base it off age of the unit and the condition of the other components such as compressors and motors. Note : when replacing the coaxial coil it is brazed copper to steel so you will need to be familiar with brazing this using 50% silver solder with flux.
Just subscribed, I too am looking forward to this video and others... Also do you have a link on circuit setter/ strainer valves etc. Possibly consider building out your channel with links to tools and equipment used to add additional revenue streams. Thanks for the video. I am dealing with my mothers WSHP that keeps shutting off from high head pressure. I think its a building issue. building says its the unit even though its brand new and the old one was doing same thing so my mother had it replaced. However it was installed (not by me) no strainer, the only thing it has is two shut off valves... Last AC tech that came out said strainer wasn't needed... I call BS on that while it might work without it eventually it seems like it could lead to issues.
