Carrier P274-0100-C owner manual Display Outdoor Temperature -- To display the, General, Owners

OWNER'S

MANUAL

Part Numbers P274-0100-C,

J mingIMPORTANT:thethermostatRead. entire instructions before program-

GENERAL

Tot_dine® thermostats are wall-mounted, low-voltagether- mostats which maintain room temperature by controlling the operation of an HVAC (heating, ventilation trod air condition-

ing) system. Sepm'ate heating and cooling set points and

auto-changeover capability allow occupied and unoccupied programming for energy savings.

During power interruption the internal memory stores tem- perature and mode settings for an unlimited time. Batteries are not required.

OPERATION

Thermostat Display --The thermostat display is locat- ed in the top center of the thermostat. See Fig. 1. The following information can be displayed on the screen:

•mode (OFF. HEAT. COOL, EHEAT, or AUTO)

•fan setting (ON or AUTO)

•auxiliary heat status (P274-0200-C, -0300-C only)

•room temperature

•desired temperature

•reset tilter

•outdoor temperature (P274-0200-C, -0300-C only)

Thermostat Buttons --Thethermostat has buttons

which are used to change the set points of the thermostat and

set the thermostat modes. The buttons are accessible from

behind the thermostat covel: To access the buttons, pull on the

hinged thermostat covel: The buttons ;ue: MODE, FAN, and RESET FILTER. See Fig. 1.

The UP and DOWN buttons are used to change the cunent, desired temperature set point and to scroll through program-

ming set points. The UP and DOWN buttons am located on the fi'ont of the thermostat.

Setting Indoor Temperature Set Points

1.Press the UP or DOWN button one time. The LCD (liquid crystal display) will illuminate and the current

temperature set point will be displayed. Next to the

temperature display, HEAT or COOL will be dis- played. SET TEMP will appear above the temperature display.

2.To change the temperature set point, continue to press the UP or DOWN buttons until desired temperature is reached. Press the MODE button to set temperature for another setting (Heat or Cool).

Residential

Non-Programmable

Thermostat

P274-0200-C, P274-0300-C

3. The thermostat will automatically return to regular operation within 5 seconds.

NOTE: The cool setting must be at least 2 degrees higher than the heat setting for proper operation.

Fan Operation --33_e FAN button selects fan operation. The fan can operate in either Fan ON or AUTO mode.

Press the FAN button to switch between fan ON or AUTO mode. When the fan is set to ON, "FAN" is displayed in the LCD on the thermostat. The fan will mn continuously for im- proved air circulation while in the ON position.

When the fan is set to AUTO mode, the fan runs only as needed to maintain indoor air temperature.

NOTE: The "FAN" indicator will not be displayed in the LCD when thermostat is operating in AUTO mode.

Mode Operation --The Mode button selects the operat- ing mode of the thermostat. Pressing the MODE button will rotate the following options on the LCD: OFF. HEAT. COOL, AUTO, and EHEAT (heat pump models only). The mode

for each selection will be displayed on the thermostat when selected.

NOTE: If AUTO is selected, the thermostat will enter Heating or Cooling mode based on the room temperature and the heat- ing and cooling set points.

Display Outdoor Temperature -- To display the

outdoor-air temperature on thermostats offering this feature,

simultaneously press the UP and DOWN buttons for twenty seconds. The outdoor temperature will then be displayed on the LCD.

NOTE: Two dashes "--" appearing on the LCD indicates that the thermostat either does not have this feature installed or the

temperature sensor is not properly connected.

Reset Filter Display --The thermostat will display

"FILTER" on the LCD when it is time to change or clean the filtel:

After cleaning or changing the filter, press the RESET FILTER button to restart the timer and turn off the indicator

Auto Changeover Operation --The thermostat will

provide automatic changeover from Heating to Cooling mode and Cooling to Heating mode when required. The thermostat will automatically switch to maintain the desired temperature setting. The thermostat does not need to be manually changed fi_)m heating to cooling or cooling to heating operation.

Manufacturer reserves the right to discontinue, or change at any time,

specifications or designs without notice

and without Incurring obllgaUons.

REPLACEMENT COMPONENTS DIVISION	LITERATURE NUMBER P274-7SO
©CARRIER CORPORATION 2004 9-04	REPLACES: 997-510011-19
PRINTED IN U.S.A.	CATALOG NO. 570-352