Radio Thermostat CT110 Install Manual page 3

REMOVE OLD UNIT
Switch OFF electricity to the HEATING and COOLING systems.
Then follow these steps:
• Remove cover from old thermostat. Most are snap-on types and simply pull off. Some have locking screws
on the side or front. These must be loosened. DO NOT remove wires. Note the letters printed near the
terminals. Attach labels (enclosed) to each wire for identification.
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 remov-
ing wires from their terminals, ignore the color of the wires and
LABEL THEM by the lettered terminal where they were screwed.
• Label the wires one at a time. You must label all the wires before
you proceed.
• With all wires labeled, remove them from the old unit.
• Make sure the wires do not fall back inside the wall. You can wind
them around a pencil to keep them from falling.
• Loosen all screws on the old thermostat and remove it from the
wall.
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