Question about Heating & Cooling
Can any advise me as to weather the overheat safety thermostat should be nomally open or normally closed please.
It could be No or NC depending on the system configuration, to determine which it is there are several things that can be done. Check the wiring diagram, check with a Ohm meter. Generally I would expect it to be N/C if it is thermal. A N/O safety would need to activate a secondary device( relay ?) generally not a good idea.
Posted on Jan 11, 2013
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Posted on Jan 02, 2017
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