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Actuators, T-Stats, & VA's oh my.
Can anybody help me with the math here.
Uponor Actuator 3023552
Start Current: <300mA
Working : 1W
End Switch: 24VAC, .05A
Switching Current: 24VAC, 3 A resistive load, 1 A inductive load
Honeywell Pro 1000 non-programmable
Heat: 20-30VAC, .02-1.0A
Floor 1: 8 Actuators, 3 T-Stats
Floor 2: 8 Actuators, 5 T-Stats
So this is for a friend who is an hour outside of town and was wiring it last week and blew a transformer.
Uponor told me when I called (I couldn't find the document using my phone today so I called) that 4.5VA is what I should use to size this. So I do not know if my buddy has a shorted wire or somewhere or not. But he only tried Floor 1 thus far. My math says 36VA for those 8 Actuators. If the 1A on a T-stat really equates to 1VA then it still should have been only 39VA on that transformer that blew. Actually thinking now, the T-stats are not installed yet as the painting isn't complete so the wires would have been twisted together. Either way I have time to go help them out tomorrow but I want to know that I'll going to be safe with a 40VA transformer, since I know there are none available in my area bigger than 40. But if I have to I will bring out a few and try to break them down a little more.
Thank you for sitting through this.