Step 2: Removing Existing Thermostat
WARNING: To avoid electrical shock and to prevent damage to the furnace, air conditioner, and thermostat disconnect the power supply at the circuit breaker or heater and air conditioner before beginning work.
CAUTION: Read instructions carefully before removing any wiring from existing thermostat. Wires must be labeled before they are removed. THERE IS NO STANDARD COLOR CODE. When removing wires from their terminals, ignore the color of the wires since these may not comply with any standard.
1.Switch electricity to the furnace and air conditioner OFF by disconnecting the power supply at the circuit breaker or at each unit.
2.Remove cover from the existing thermostat. Most are
3.Note the letters printed near the terminals. ATTACH LABELS (enclosed) to each wire for identification.
Note: It is very important to label all wires before disconnecting them.
4.Label the wires one at a time. You must label all the wires before you proceed. With all wires labeled, remove them from the existing thermostat. Do not let the wires fall back inside the wall. Wrapping them around a pencil, as shown, will keep them from falling.
5.Loosen all screws on the existing thermostat and its mounting plate and remove it from the wall. Be careful not to disturb wiring labels.
6.(Optional) Fill wall opening with
non-combustible insulation to prevent drafts.
IMPORTANT:
LABEL ALL WIRES BEFORE
DISCONNECTING THEM!
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G | W |
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Wrap wires around |
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pencil to prevent |
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wires from falling |
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into wall opening. |
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Note: Be careful, do not allow bare wires to touch, or short, each other.
Continued Next Page
Installation
7
