5
1)
Restore the system power. The LCD (liquid crystal display) will
alternately display the time and room temperature. The LCD will
illuminate at the touch of the red or blue arrow keys. LCD will
return to its normal state after 10 seconds.
2)
Set the fan switch to the
ON
position. The system blower should start.
3)
Set the fan switch to the
AUTO
position. The system blower should stop.
4)
Set the system switch to the
HEAT
position and depress the red
arrow key until the temperature set point is at least 3 degrees
above the room temperature. The LCD will display a flame icon to
indicate heat. The heating system should start within several sec-
onds (the system blower may not come on immediately).
5)
Set the system switch to the
OFF
position. The system should shut down within several seconds. The LCD
will again alternately display the time and room temperature.
6)
Set the system switch to the
COOL
position and depress the blue arrow key until the temperature set point is
at least 3 degrees below the room temperature. The LCD will dis-
play a snowflake icon to indicate A/C. The cooling system should
start within several seconds.
WARNING:
Do not perform this test
if the outdoor temperature is below 50 F.
7)
Set the system switch to the
OFF
position. The system should shut
down within several seconds. The LCD will again alternately display the time and room temperature.
Programming The User Settings
Temperature Differential
is factory set at .5 F (0.25 C) for both heating and cooling cycles. The room tempera-
ture must change .5 F (0.25 C) from the set point temperature before the thermostat will initiate a call for heat or
A/C. This should be appropriate for most applications. However, if the system is cycling on and off too frequent-
ly, the setting can be adjusted as follows.
Image shows display alternating between time
and a room temperature of 70
Image shows room temperature of 71 and Heat set
point of 75 as the display alternates every 3 seconds.
Image shows room temperature of 76 and A/C set
point of 73 as the display alternates every 3 seconds.
70814-IM 12/22/06 2:00 PM Page 5
