Hi all, long time lurker, I am at my wit's end on this issue.
Self installed a CB 6048 last year, this being my 2nd winter with it. My plumbing was set up to go through the sidearm, to the furnace HX, and then back to the boiler. I had a mixing valve on top of the hot water heater to maintain safe temps.
As far as heating the water, it worked great. I ran into several issues last winter where my DHW pressure would drop to almost nothing, or not even supply the upstairs of my house. I had assumed due to the hard water that we have, it was plugging up, so monthly I would remove it, clean the screens, etc. Once the boiler was shut off in the spring and the gas was turned back on to the water heater, we had no further issues.
Lit the boiler yesterday, and once everything was up to temperature the wife went to take a shower and no water pressure. I decided to do away with the mixing valve, and put a manual valve to mix cold water with the hot water. I am still having sporadic hot and cold water pressure. Yea, its wierd.
This only occurs when the OWB is up to temperature. Prior to lighting, I had the circ pump running for a couple weeks to keep the boiler warm as I wasn't ready to light it yet, but we had a couple freezing nights. No issues with water pressure until the OWB was up to temp.
I am really at a loss as to what could be causing this. The sidearm is off the drain of the hot water heater, and the top returns to the hot water outlet at a T approximately 3 inches above the top of the water heater. Again, I have no issues with the water in the heater being hot. Somehow the sidearm, when it is up to temperature, is killing my hot and cold water pressure in the house. The only valves to the hot water heater are both open, there are no leaks.
Tonight I cut the PEX to the sidearm and bypassed the sidearm altogether until I can figure this out. Once I reconnected I went to check water pressure and everything is normal. There are no leaks through the HX, the boiler isn't constantly filling.
Any suggestions or thoughts or ideas would be greatly appreciated. Thanks for your time.
Self installed a CB 6048 last year, this being my 2nd winter with it. My plumbing was set up to go through the sidearm, to the furnace HX, and then back to the boiler. I had a mixing valve on top of the hot water heater to maintain safe temps.
As far as heating the water, it worked great. I ran into several issues last winter where my DHW pressure would drop to almost nothing, or not even supply the upstairs of my house. I had assumed due to the hard water that we have, it was plugging up, so monthly I would remove it, clean the screens, etc. Once the boiler was shut off in the spring and the gas was turned back on to the water heater, we had no further issues.
Lit the boiler yesterday, and once everything was up to temperature the wife went to take a shower and no water pressure. I decided to do away with the mixing valve, and put a manual valve to mix cold water with the hot water. I am still having sporadic hot and cold water pressure. Yea, its wierd.
This only occurs when the OWB is up to temperature. Prior to lighting, I had the circ pump running for a couple weeks to keep the boiler warm as I wasn't ready to light it yet, but we had a couple freezing nights. No issues with water pressure until the OWB was up to temp.
I am really at a loss as to what could be causing this. The sidearm is off the drain of the hot water heater, and the top returns to the hot water outlet at a T approximately 3 inches above the top of the water heater. Again, I have no issues with the water in the heater being hot. Somehow the sidearm, when it is up to temperature, is killing my hot and cold water pressure in the house. The only valves to the hot water heater are both open, there are no leaks.
Tonight I cut the PEX to the sidearm and bypassed the sidearm altogether until I can figure this out. Once I reconnected I went to check water pressure and everything is normal. There are no leaks through the HX, the boiler isn't constantly filling.
Any suggestions or thoughts or ideas would be greatly appreciated. Thanks for your time.