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How to install a programmable thermostat (Page 2)


Step 5. Position the new thermostat base on the wall and guide the wires through the central opening. Screw the base to the wall.

 

Step 6. Check the manufacturer’s instructions to establish the correct terminal for each low-voltage wire. Then connect the wires to these terminals, making sure each screw is secure.

 

Step 7. These thermostats require batteries to store the programs so they won’t disappear if the electric power goes out in a storm. Make sure to install these batteries before you snap the thermostat cover in place. Then program the new unit to fit your needs and turn on the power to the furnace.

 

Mercury Thermostats

Older model thermostats (and even a few still being made today) often contained one or more small vials of mercury totaling 3 to 4 grams in weight. Because mercury is a highly toxic metal that can cause nerve damage in humans, along with other environ mental problems, DO NOT dispose of an old mercury thermometer with your household waste. Instead, bring it to a hazardous waste disposal site, or a mercury recycling site if your area has one (check with your local solid waste disposal agency). The best way to determine if you old thermostat contains mercury is simply to remove the cover and look for the small glass vials or ampules containing the silver mercury substance. If you are unsure, it is always better to be safe and keep the device in question out of the normal waste stream.
 

 

 

 

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