Where to attach bare copper ground on a Honeywell RLV430A?

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Old 02-04-11, 02:10 PM
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Where to attach bare copper ground on a Honeywell RLV430A?

I have electric baseboard heat and am trying to replace my current dial thermostat (can't find any manufacturer name) with a Honeywell RLV430A. The Honeywell only has two black wires to be hooked up. The old thermostat has a red wire, a black wire, and a bare copper ground attached to it. I'm good with hooking up the red and black wires on the old thermostat to the two black ones on the Honeywell. My question is, what do I do with the bare copper ground? Thanks for your help!
 
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Old 02-04-11, 02:56 PM
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If the thermostat is being installed in a metal box then the ground wire should terminate on the box with a ground screw, wire nut the end and leave the rest in the box. If its a plastic box, just wire nut it and stick it back in the box. No need to worry about hooking it up to the thermostat if theres no ground wire on the stat.
 
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Old 02-04-11, 08:38 PM
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Hey, thanks for the help. I hooked it up just the way you said and it works great. Another question I have is that with the settings from the factory it cycles on and off every 15 seconds. Is this alright for the baseboard? I don't know why, it just seems that this would be kind of hard on things cycling that much. It says to change the setting to conventional control for a fan-forced heater. My baseboard is not fan-forced, however, would it still be better to change over to this setting so that the baseboard does not cycle as often? Thanks again for the help!
 
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Old 02-04-11, 11:01 PM
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The 15 second cycling is normal for this type of thermostat and will not harm the baseboard heaters. The theory is to keep the heaters warm at all times to aid in convection to keep the air circulating in the room instead of heating the baseboard heater up and then letting it cool down and then back up again. The cycling rate will change depending on heat requirement, outside temperature etc. It will keep the room at a more constant temperature as apposed to your old dial thermostat. Leave the thermostat set for proportional control (default setting) not conventional control since you don't have fan forced heaters.
 
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