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I want to be able to switch an HVAC unit on/off. The unit is 220V AC. With
the compressor on the unit draws about 8 amps.
Because of the high voltage/current I want to make sure that this is
completely safe.
1. Is this project a bad idea in general, or is switching through the relay
a safe way to turn AC/heat on and off (rest of circuit will be optically
isolated)
2. Assuming that I don't toggle power too often, is this switching method
'bad' for the AC unit (eg. for the AC give it several minutes before turning
it on again, if it has just been turned off)
3. If I use a relay rated at 220V 10A will that be sufficient?
4. Can anyone recommend a relay with above specs (coil DC 6V, 9V or 12V),
with not too loud a click?
Thanks
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