Originally Posted by Offgr1d
The TXV was damaged upon install with getting brazing too hot is all... A simple mistake because we had a fussy connection and did it multiple times.. I'm not running any glycol yet - don't think I'll need to in my desert climate. The chiller condensers are ran to the original but modified rooftop air cooled coils. 5 fans cool the two coils..
something ive used as an alternative to brazing is staybrite 8, I got criticized for using it 7 years ago when I needed to replace a cracked section of pipe and a reversing valve in one of my heatpumps.. (the old-timers said braze or die)..
but it works at much lower temperatures than brazing.. and theoretically you never have to heat the pipe enough to reach oxidation levels so a nitrogen purge isnt necessary.. (though I still ran one just because I have the taks and gear to do it)..
I havent had one joint out of the 10 or so that I have fail in 7 years. and a couple of them are right at the compressor so they take lots of temperature fluctuations and vibration...
I started out using it exclusively for reversing valves or EEV's.. but now I use it on everything.. even copper water pipes...
one thing that definitely does NOT WORK is HVAC super pro... (a glue that supposedly was good for joining HVAC pipes...).. I got notofied by my computer about a month later that the refrigerant in 'unit 2' was low.. I knew the first place to go with my leak detector solution!!..