How much current do the 24VAC solenoids need? You can almost certainly use opto triacs to switch them, which would be quieter, cheaper and smaller than relays. For example, http://www.farnell.com/datasheets/1244301.pdf will switch 0.9A.
How much current do the 24VAC solenoids need? You can almost certainly use opto triacs to switch them, which would be quieter, cheaper and smaller than relays. For example, http://www.farnell.com/datasheets/1244301.pdf will switch 0.9A.