A am planning to order a Taco 3 Zone Switching Relay w/ Priority SR503-2. It will run three pumps, activated by thermostats.
What if any are the considerations for the expandable model? This may be the time to buy the EXP Model?
It appears that the PC610: Pump Exercise Plug-In Card may be a plus if I am away from the boiler for extended times and am worrying about freeze-up.
If I did not buy the card for the exp model is there another simple way to set up an exercise program for the pumps at an interval of my choosing?
What if any are the considerations for the expandable model? This may be the time to buy the EXP Model?
It appears that the PC610: Pump Exercise Plug-In Card may be a plus if I am away from the boiler for extended times and am worrying about freeze-up.
If I did not buy the card for the exp model is there another simple way to set up an exercise program for the pumps at an interval of my choosing?