Installer Guide 10
• Proper installation of the thermostat will be accomplished by following
these step by step instructions. If you are unsure about any of these steps,
call a qualified technician for assistance.
• These tools will be required:
• Make sure your Heater/Air Conditioner (Heat Pump for PSP2100) is working
properly before beginning installation of the thermostat.
• Carefully unpack the thermostat. Save the screws and instructions.
• Turn off the power to the Heating/Air Conditioning (or Heat Pump for
PSP2100) system at the main fuse panel. Most residential systems have a
separate breaker for disconnecting power to the furnace.
Flat Blade
Screwdriver
Wire Cutter
& Stripper
4 Preparation and Installation
Remove & Replace Old Thermostat
• Remove the cover of the old thermostat. If it does not come off easily check
for screws.
• Loosen the screws holding the thermostat base or subbase to the wall, and
lift away.
• Disconnect the wires from the old thermostat. Tape the ends of the wires as
you disconnect them, and mark them with the letter of the terminal for easy
reconnection to the new thermostat.
• Keep the old thermostat for reference purposes, until your new thermostat
is functioning properly.
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