“I was using this unit as a way to tidy up some wiring while providing a 24 Vac source for a controller. If zone 1 is not being used, you MUST remove the jumper powering the zone1 area of the board or the unit will not provide reliable 24 Vac upon power loss & recovery.”
“The Taco SR501 has and is a very reliable product. I have utilized this product on hydronic systems for fan coils and single zone use for the past 15 years. No issues have been encountered to date with this product.”
“I like this switching relay instead of the ARGO or Honeywell models because of the LED indicators. Customers like to see visual status of system operation.”
