I have a weil mclain ultra boiler that has supplied a HWH and domestic baseboard heating loop for a couple years. I just recently expanded to include a radiant heating loop which is controlled by a taco relay station. I had it up and running successfully for a few hours yesterday. When the boiler is running at 180 degrees the radiant loop is pumping and running at 130-140 degrees and heating well.
Here is the issue: when the primary heating loop thermostat is satisfied,, the boiler modulates and the boiler water temperature drops to as low as 130 degrees. This is causing the temperature in the radiant loop to drop to below 100, which isn't really heating well. The radiant loop wont satisfy the temperature for it's own thermostat and it just keeps pumping luke warm water through the loop until the primary loop calls for the boiler to fire again.
When the primary loop is not telling the boiler to heat and the radiant loop isn't satisfied, should the radiant loop be telling the boiler to continue heating at a normal range? Is it possible the wire between the taco relay station and the boiler motherboard isn't working correctly? For anyone that knows Weil Mclain I used P-11 (1 and 2). These are the only things I can think of getting in the way, since it's otherwise working well.
Any help would be really appreciated.
Here is the issue: when the primary heating loop thermostat is satisfied,, the boiler modulates and the boiler water temperature drops to as low as 130 degrees. This is causing the temperature in the radiant loop to drop to below 100, which isn't really heating well. The radiant loop wont satisfy the temperature for it's own thermostat and it just keeps pumping luke warm water through the loop until the primary loop calls for the boiler to fire again.
When the primary loop is not telling the boiler to heat and the radiant loop isn't satisfied, should the radiant loop be telling the boiler to continue heating at a normal range? Is it possible the wire between the taco relay station and the boiler motherboard isn't working correctly? For anyone that knows Weil Mclain I used P-11 (1 and 2). These are the only things I can think of getting in the way, since it's otherwise working well.
Any help would be really appreciated.