N
nate379
Guest
Realized today that the way I installed my outdoor reset this spring, it wasn't working right.
The boiler has 2 pumps for the floor heat. One on the primary loop and another on the secondary. I thought both pumps were controlled off the reset. I don't hardly use the boiler but the couple times I have kicked it on seemed like it was taking forever to warm up the house.
What was happening is pump A would run with the outdoor reset and pump B was only running when the boiler fired. It was being controlled off the end switch.
T Stat calls for heat, boiler runs till it's up to temp the reset is calling for. Pump A and B are running. Boiler shuts down and only pump A runs. Pump A keeps on running and running just recycling colder and colder water. Primary loop would be 150* for example and secondary loop 70*. Without pump B running it won't run hot water through the mixer and the only way that primary loop water cools is from heat lose and maybe a bit of thermal transfer. The reset sensor is on the primary loop so it would think everything is fine while the whole time it was just running 60-70 water through the slab.
Rewired it to now BOTH pumps are run off the outdoor reset. Seems to be working correctly now.
The boiler has 2 pumps for the floor heat. One on the primary loop and another on the secondary. I thought both pumps were controlled off the reset. I don't hardly use the boiler but the couple times I have kicked it on seemed like it was taking forever to warm up the house.
What was happening is pump A would run with the outdoor reset and pump B was only running when the boiler fired. It was being controlled off the end switch.
T Stat calls for heat, boiler runs till it's up to temp the reset is calling for. Pump A and B are running. Boiler shuts down and only pump A runs. Pump A keeps on running and running just recycling colder and colder water. Primary loop would be 150* for example and secondary loop 70*. Without pump B running it won't run hot water through the mixer and the only way that primary loop water cools is from heat lose and maybe a bit of thermal transfer. The reset sensor is on the primary loop so it would think everything is fine while the whole time it was just running 60-70 water through the slab.
Rewired it to now BOTH pumps are run off the outdoor reset. Seems to be working correctly now.