REMOVE OLD THERMOSTAT
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
2. Remove the front cover of the old thermostat. With wires
still attached, remove wall plate from the wall. If the old
and the wall mounting plate as an assembly.
labels enclosed with the new thermostat.
4. Disconnect the wires from old thermostat one at a time. DO
NOT LET WIRES FALL BACK INTO THE WALL.
5. Install new thermostat using the following procedures.
Figure 1. Back of thermostat base
1. Remove the packing material from the thermostat.
Alkaline batteries (3 “AA”–
install “+” ends to the left)
2. This thermostat is configured from the factory to operate a
heat/cool, fossil fuel (gas, oil, etc.), forced air system. It is
configured correctly for any system that DOES NOT require
the thermostat to energize the fan on a call for heat.
If your system is an electric heat or heat-pump system that
REQUIRES the thermostat to turn on the fan on a call for
heat, locate the GAS/ELECTRIC switch on the back of the
thermostat (see fig. 1) and switch it to the ELECTRIC
position. This will allow the thermostat to energize the fan
cooling system requires the thermostat to control the fan,
contact a qualified heating and air conditioning service
3. Two jumpers are also located on the back of the thermostat,
so that you may customize the thermostat to meet your
individual preference (see fig. 1). In most applications, the
factory jumper settings provide the most comfortable and
convenient thermostat operation.
Figure 2. Thermostat base
Jumper wire W905 determines how fast the system cycles
on and off, based on temperature change. As shipped from
the factory, the thermostat will maintain a very consistent
room temperature, usually within 1°F of the thermostat
setting. To achieve a slower on and off cycle, providing a
slightly wider temperature span, cut and separate jumper
INSTALLING THE THERMOSTAT
1. Gently remove the cover by pulling it straight off the base.
Forcing or prying on the unit may cause damage to the unit.
2. Remove the battery tab. With the batteries installed, the
Armchair Programming feature allows you to program the
thermostat before installing it on the wall.
ery (EMR) feature. EMR allows the thermostat to energize
the heating system up to 30 minutes before the time pro-
grammed into the thermostat. The thermostat will then
energize the system to gradually raise the temperature to
your programmed temperature by using the most efficient
stage of heat practical.
3. Pull wires through the hole in the thermostat base and place
the base over the hole in the wall. Mark mounting hole
locations on the wall using the base as a template.
4. Move the base out of the way. Drill mounting holes.
For example, assume that the thermostat is programmed
programis7AM, 70°F(anincreaseof4°), thethermostatwill
start the system 30 minutes before 7 AM. If the temperature
in the room is within 2°F of your next programmed tempera-
ture, the thermostat will not start the system early.
5. Fasten the base loosely to the wall, as shown in fig. 2, using
two mounting screws. Place a level against the bottom of the
base, adjust until level, and then tighten the screws. (Level-
ing is for appearance only and will not affect thermostat
operation.) If you are using existing mounting holes, or if the
holes drilled are too large and do not allow you to tighten the
base snugly, use plastic screw anchors to secure the base.
DO NOT clip jumper wire W903 unless you wish to perma-
nently disable the EMR feature.
6. Check that the system is turned off. Connect the wires
beneath the terminal screws on the base using the appropri-
ate wiring diagram (see figs. 3 through 5).
7. Push excess wire into wall and plug hole with a fire-resistant
affecting thermostat operation.
(Instructions continue on page 4.)