Carrier To Select, → ÐCheck Thermostat Operation, To Test the FAN, To Test Cooling

4.Press SET TIME/TEMP button again to flash upper small display for selection of another option, or press END to exit configuration mode.

Option 3ÐFahrenheit or Celsius Operation

Select between Fahrenheit and Celsius operation. Factory default is Fahrenheit.

TO SELECT OR ADJUST:

1.Enter configuration mode if not already there. See above. Use up and down buttons to make small (now flashing) display indicate 03.

2.Press SET TIME/TEMP button once to flash current selection of F or C. Factory default is F.

3.Use up and down buttons to move between F and C on large display.

4.Press SET TIME/TEMP button again to flash upper small display for selection of another option, or press END to exit configuration mode.

Option 4ÐEnable Fan (G) On With Any Heat (W)

This selection determines whether the G (fan) output is to be on or off when any W (furnace or strip heat) output is ON. Most fan coils manage their own blowers and do not require a separate G signal. For these applications, select OF (off). Some auxiliary heaters require a separate G signal to turn on the blower. In this case, select ON. Factory default is OF.

TO SELECT:

1.Enter configuration mode if not already there. See above. Use up and down buttons to make small (now flashing) display indicate 04.

2.Press SET TIME/TEMP button once to flash currect selection of OF or ON. Factory default is OF.

3.Use up and down buttons to move between OF and ON on large display.

4.Press SET TIME/TEMP button again to flash upper small display for selection of another option, or press END to exit configuration mode.

Option 8ÐAuxiliary Heat Lockout Temperature

Present in heat pump and 2-speed models only when configured as a heat pump. Outdoor temperature sensor must be attached. This option allows selection of an outdoor temperature of 5 through 55°F in 5° steps (or equivalent values in C), or OF (off). Auxiliary heat is prevented from operating for outdoor temperatures above the selected temperature. If OF (off) is selected, auxiliary heat is allowed at all outdoor temperatures. If selected, emergency heat (EHEAT) overrides this feature. Factory default is OF.

TO SELECT:

1.Enter configuration mode if not already there. See above. Use up and down buttons to make small (now flashing) display indicate 08.

2.Press SET TIME/TEMP button once to flash large display.

3.Use up or down buttons to move between OF, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, or 55 on large display. Factory default is OF.

4.Press SET TIME/TEMP button again to flash upper small display for selection of another option, or press END to exit configuration mode.

Option 13ÐRoom Temperature Offset Adjust

This option allows calibration (or deliberate miscalibration) of room temperature sensor. There are various reasons why home- owners may want to have displayed temperature adjusted to a

higher or lower value. The selected number is number of degrees, plus or minus, which will be added to actual temperature. The numbers can range between -5 and +5. Factory default is 0. This adjusted value will be used as actual temperature for both display and control action. For example, if 2 is selected, 72°F actual will read 74°F. If set point is 72°F, the room will control to an actual temperature of 70°F which will be displayed and acted upon as if it were 72°F. The effect is that a positive number selection will make the room temperature lower and vice versa. The thermostat is calibrated within an accuracy of plus or minus 1° when shipped from the factory, so this adjustment will provide the best accuracy when set to 0.

TO SELECT:

1.Enter configuration mode if not already there. See above. Use up and down buttons to make small (now flashing) display indicate 13.

2.Press SET TIME/TEMP button once to flash large display.

3.Use up or down buttons to move between -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, or 5 on large display. Factory default is 0.

4.Press SET TIME/TEMP button again to flash upper small display for selection of another option, or press END to exit configuration mode.

Option 15ÐEnable Auto Mode

This option allows the installer to enable or disable AUTO mode (automatic changeover between heat and cool). When disabled, AUTO icon does not appear when successive presses of MODE button are used to move between OFF, HEAT, COOL, and EHEAT (in heat pump systems). Factory default is ON (AUTO enabled).

TO SELECT:

1.Enter configuration mode if not already there. See above. Use up and down buttons to make small (now flashing) display indicate 15.

2.Press SET TIME/TEMP button once to flash large display.

3.Use up and down buttons to move between OF and ON on large display. Factory default is ON (AUTO enabled).

4.Press SET TIME/TEMP button again to flash upper small display for selection of another option, or press END to exit configuration mode.

→Step 5ÐCheck Thermostat Operation

Before doing the checkout, press HOLD button to turn on HOLD icon, locking thermostat in hold mode. This will assure set points don't change during the checkout. Outputs for each stage of operation are listed in Table 2. In the table, the actual use of each terminal is underlined for terminals having double use.

TO TEST THE FAN:

1.Press FAN button. The fan ON icon and the G output will go on within a few seconds, causing fan to operate.

2.Pressing FAN button again will turn off the G output and turn off fan AUTO icon.

TO TEST COOLING:

Press MODE button until COOL icon under it turns on. Press down button until cool set point (upper right 2 digit display with COOL now flashing under it) is 2° or 3° below room temperature. This will create a cooling demand. A small triangle to the left of this COOL icon will flash or come on continually. Flashing means the equipment is going to turn on but is presently being held off by a system timer. (See Operational Information for timer descrip- tions.) Defeat the timer by pressing INCREASE TEMPERATURE button (up and FAN buttons together). This will make the triangle

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