Radio Flyer
Member
I have a 13-year-old Vaughn S35TPP indirect water heater (see photo) heated by a Budrerus oil-fired boiler with a Grundfos recirc pump set on high speed. I have the water heater aquastat set to 145° with a 10° differential, and I have a mixing valve set to about 122°.
People say an indirect creates "endless" hot water, but my experience is the opposite. After a twenty minute shower with a low-flow shower head, the hot water is gone and recycling takes at least half an hour.
Should I try cleaning the coil? If so, what would I use to clean it? CLR or maybe vinegar? I'm assuming I'd need to install new O-rings when reinstalling it, right?
To remove the coil I'd need to cut the unit out, since three of the connections are sweated and fixed above (see photo). Afterward, do I then sweat on slip couplers to reinstall, or is there a better method? And should I have some kind of heat loop at the cold inlet?
Thanks for any advice!
People say an indirect creates "endless" hot water, but my experience is the opposite. After a twenty minute shower with a low-flow shower head, the hot water is gone and recycling takes at least half an hour.
Should I try cleaning the coil? If so, what would I use to clean it? CLR or maybe vinegar? I'm assuming I'd need to install new O-rings when reinstalling it, right?
To remove the coil I'd need to cut the unit out, since three of the connections are sweated and fixed above (see photo). Afterward, do I then sweat on slip couplers to reinstall, or is there a better method? And should I have some kind of heat loop at the cold inlet?
Thanks for any advice!