Hooking up 240 VAC relay transformer to 24v thermostat
I'm doing this so that I can use a modern thermostat and not have to rely on the very limited selection of line-voltage progammable thermostats out there. According to the instructions for the RC840T, it cautions about adding an overload protection and cut off. As this will be in my house, it will already be on the home circuit breaker ( Of course this is very old and I don't trust it that much). Am I incurring any more risk than was there already for the old manual Cadet thermostat?
Just as an example, I am looking at the AUBE/Honeywell RC840T, On/Off Switching Electric Heating Relay with Built-in 24 V Transformer.
Besides the standard precautions of putting everything in an electrical box, please let me know if you have any suggestions.
1. If I can fuse this what kind of fuse can I use? (Most 20AMP fuses look pretty large)
2. Are there any recommendations for other relay transformers?
3. Will the relay transformer put off a lot of heat to distort the thermostat?