I apologize ahead of time for this elementary, and quite possibly poorly posed, question, but I am a coward and want to make sure that I am understanding everything correctly, and not blow four motors...
We have a hydronics heating system, and we are adding a fourth heating zone. Each zone is controlled by a motorized zone valve (https://forwardthinking.honeywell.com/related_links/water/5000_series/install/95c_10932.pdf).
The (above) manual says that the motors have, as
Actuator Electrical Rating: 24Vac 60 Hz, 0.30 A Current Draw, 5 W, 7.2 VA maximum
[The label on the actual device says 0.32 A; in any case, I note that 0.3 X 24 = 7.2 above]
Now, these are on the 'secondary' side of a transformer; the relevant portion of the transformer label says
40 VA PRI 120 V SEC 24 V
My practical question is:
- Since $$ 40 > 4 \times 7.2, $$ am I reading things correctly, and it is safe to add the fourth motor?
I also have an 'enquiring minds want to know' question:
- Are the numbers above enough to know what is the power draw on the 120 Vac side, when no motors are running, and when the 4 motors are running?
Thank you very much...