Operating Features; Computed Energy Management Recovery (Emr) - White Rodgers 1F97-71 Operation Manual

OPERATING FEATURES

Now that you are familiar with the thermostat
display and buttons, read the following information
to learn about the many features of the thermostat.
• COMPUTED ENERGY MANAGEMENT RE-
COVERY (EMR) — The thermostat's micro-
computer can be set to automatically calculate
the time it will take to change the temperature
to the next program setting. Then the thermo-
stat will activate the heating or cooling system
to change the temperature so that the desired
temperature is reached at the beginning of the
next program period. As an example of this
feature, assume that you have programmed
your thermostat to provide an overnight heat-
ing temperature of 62 F, and that during the
next program period, beginning at 6:00 AM,
you have programmed a temperature of 70 F.
12
The thermostat will automatically activate the
heating system at 5:00 AM, so that the pro-
grammed 70 F temperature is reached by
about 6:00 AM.
This feature is controlled by Group B option
switch #3. To enable the EMR function, first
you must move option switch #3 (located on
the back of the thermostat body) to the OFF
position, if it has not already been done. To do
this, turn off 24v AC power to the thermostat.
Then remove the thermostat body from the
wall. Check the position of switch #3 (the last
switch on the right). If it is OFF (down), simply
put the thermostat back on the wall and re-
store 24v AC power. If the switch is ON (up),
remove the battery, then use a pencil or small
screwdriver to move the switch to the OFF
position (see figure below). Leave the battery
out of the thermostat for at least two minutes,
to allow the thermostat to reset itself. See