shawn06260
New Member
I originally stuck this in the boiler forum but thought it might better be answered over here...Thanks in advance if you can help at all.
Hi All, was hoping someone might be able to help me out here. I'm replacing a 40yr old boiler which currently has 2 heating zones and an indirect tank. It currently has 3 old R845A relays which I'm hoping to replace with a new Taco SR503. The Aquastat that comes with my burner is a Hydrolevel 3250 Plus. https://hydrolevel.com/wp-content/uploads/2019/11/HydroStat-3250-Plus-Instructions-web-111919.pdf
My question is there seems to be a couple of different options to wire the indirect zone with priority and just wanted to make sure I'm doing it correctly. I originally planned to wire per diagram #5 in that manual, with the End Switch wired to the T/T on the aquastat. Then I planned on tying in the ZR of the aquastat to the hot of the indirect circulator.
The only thing that is causing me concern is the there's another diagram, #8 that's a little different and has a note "Taco’s SR503 combines ZR amd X2." Is this saying that I don't need to run that hot leg from the priority circulator circuit? Does the SR503 take care of prioritizing that Zone 3 on its own?
https://s3.amazonaws.com/s3.supplyhouse.com/manuals/1351150925280/85270_PROD_FILE.pdf
Hi All, was hoping someone might be able to help me out here. I'm replacing a 40yr old boiler which currently has 2 heating zones and an indirect tank. It currently has 3 old R845A relays which I'm hoping to replace with a new Taco SR503. The Aquastat that comes with my burner is a Hydrolevel 3250 Plus. https://hydrolevel.com/wp-content/uploads/2019/11/HydroStat-3250-Plus-Instructions-web-111919.pdf
My question is there seems to be a couple of different options to wire the indirect zone with priority and just wanted to make sure I'm doing it correctly. I originally planned to wire per diagram #5 in that manual, with the End Switch wired to the T/T on the aquastat. Then I planned on tying in the ZR of the aquastat to the hot of the indirect circulator.
The only thing that is causing me concern is the there's another diagram, #8 that's a little different and has a note "Taco’s SR503 combines ZR amd X2." Is this saying that I don't need to run that hot leg from the priority circulator circuit? Does the SR503 take care of prioritizing that Zone 3 on its own?
https://s3.amazonaws.com/s3.supplyhouse.com/manuals/1351150925280/85270_PROD_FILE.pdf
