Carrier P274 0150 Thermostat User Manual

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TOTA-  
LINE 1c.eps  
OWNER’S  
MANUAL  
Residential  
Thermostat  
gold-  
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1
Part Number P274-0150  
MODE BUTTON OPERATION — The Mode button selects  
the operating mode of the thermostat. If OFF is selected, the  
thermostat will not enter Heating or Cooling mode. If HEAT is  
selected, the thermostat will only enter Heating mode (if the  
room temperature is below the heating set point). If COOL is  
selected, the thermostat will only enter Cooling mode (if the  
room temperature is above the cooling set point). If AUTO is  
selected, the thermostat will enter Heating or Cooling mode  
based on the room temperature and the heating and cooling set  
points.  
IMPORTANT: Read entire instructions before pro-  
gramming the thermostat.  
GENERAL  
Totaline® thermostats are wall-mounted, low-voltage ther-  
mostats which maintain room temperature by controlling the  
operation of an HVAC (heating, ventilation and air condition-  
ing) system using separate heating and cooling set points and  
auto-changeover capability.  
Batteries are not required. During power interruption the  
internal memory stores set points indefinitely.  
Auto-Changeover — When the thermostat mode is set  
to AUTO, 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 from heating to cooling or  
cooling to heating operation.  
When the auto-changeover mode is selected, a change from  
heat to cool (or vice versa) will not occur until an opposite  
mode demand has existed for 20 minutes. If the set point is  
changed, the 20-minute requirement is ignored.  
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, COOL, AUTO, or HEAT)  
fan setting (ON or AUTO)  
room temperature  
NOTE: It is recommended that auto-changeover mode not be  
used if the outdoor temperature is consistently lower than 50 F  
or greater than 80 F. In these cases, select Heating or Cooling  
mode only.  
desired temperature  
clean filter status  
outdoor temperature (optional)  
Thermostat Buttons and Operation — The Up and  
Down Arrows are used to change the current, desired tempera-  
ture set point. The Up and Down Arrows are accessible from  
the outside of the thermostat. Press the up or down arrow. The  
LCD readout will be illuminated and the heating or cooling  
temperature set point will be displayed, but will not change.  
HEAT, or COOL next to the temperature display indicates  
which temperature set point is being displayed. Continue to  
press up or down arrows until desired heating or cooling tem-  
perature set point is displayed. Press the Mode button to select  
the second temperature setting (either HEAT or COOL).  
Reset Filter — The CLEAN FILTER icon reminds the  
user when it is time to change or clean the filter of the unit. The  
Reset Filter function is initiated by Pressing the RESET  
FILTER button after you have changed or cleaned your filter to  
restart the timer. The Reset Filter function is used to clear the  
CLEAN FILTER icon on the display screen.  
Display Outdoor-Air Temperature — When the Up  
and Down Arrows are pressed at the same time, the display  
will show the temperature of the sensor wired to the thermo-  
stat. The display then returns to normal. If a sensor is not con-  
nected, then “--” is displayed.  
The valid temperature range for the outdoor-air sensor is  
–38 to 145 F.  
NOTE: Your COOL setting must be at least 2 degrees higher  
than the HEAT setting. The thermostat will automatically  
change the previously set temperature to maintain that  
2-degree difference.  
POWER OUTAGE — An internal power source maintains the  
desired temperature settings indefinitely.  
FAN BUTTON OPERATION — The Fan button selects fan  
operation. When the fan is set to ON, the fan will run continu-  
ously for improved air circulation. The FAN icon will be dis-  
played on the LCD. When the fan is set to AUTO, the fan will  
run during heating and cooling operation only and provides  
energy savings.  
System Error — The temperature sensor failure indicator  
sends a -- reading to the LCD display. This indicates your ther-  
mostat’s internal or outdoor temperature sensor is no longer  
able to measure temperatures. An E2 reading on the LCD dis-  
play means there is not enough voltage for the system to  
operate.  
Manufacturer reserves the right to  
discontinue, or change at any time,  
specifications or designs without notice  
and without incurring obligations.  
REPLACEMENT COMPONENTS DIVISION  
© CARRIER CORPORATION 1106 6-01  
PRINTED IN U.S.A.  
LITERATURE NUMBER P274-6SO  
REPLACES: NEW  
CATALOG NUMBER 570-458  
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OUTDOOR TEMPERATURE  
DISPLAY SHOWS THE  
OUTDOOR TEMPERATURE  
FAN BUTTON CHOOSES  
BETWEEN ON OR AUTO  
FAN OPERATION.  
ROOM TEMPERATURE  
DISPLAY SHOWS THE CURRENT  
ROOM TEMPERATURE ON THE  
LCD READOUT.  
MODE  
OFF  
COOL  
HEAT  
AUTO  
Thermostat  
FAN  
AUTO  
ON  
CLEAN FILTER  
RESET FILTER BUTTON  
RESTARTS THE TIMER THAT  
DETERMINES THE NEXT AIR  
FILTER CHANGE OR  
CLEANING  
UP AND DOWN ARROWS  
INCREASE OR DECREASE THE  
DESIRED TEMPERATURE  
SETTING.  
RESET FILTER  
FAN  
MODE  
MODE BUTTON SELECTS  
BETWEEN OFF, HEAT,  
COOL, AND AUTO  
OPERATION.  
CLEAN FILTER INDICATOR LETS YOU  
KNOW IT IS TIME TO CLEAN OR REPLACE  
YOUR SYSTEM’S AIR FILTER  
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AVAILABLE AS AN ACCESSORY.  
NOTE: Not all messages displayed in the above illustration will appear at once in any situation.  
Fig. 1 — Thermostat Display and Buttons  
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Replacement Components Division  
Carrier Corporation  
TOTALINE 1c.eps  
RESIDENTIAL THERMOSTAT  
LIMITED FIVE-YEAR WARRANTY  
FIVE-YEAR WARRANTY — This CARRIER CORPORATION product is warranted to be free from defects in  
material and workmanship under normal use and maintenance for a period of five years from the date of original  
installation. A new or remanufactured part to replace the defective part will be provided without charge for the  
part itself, through a qualified servicing CARRIER CORPORATION dealer or service, PROVIDED the defective  
part is returned to our distributor. The replacement part assumes the unused portion of the warranty.  
THIS WARRANTY DOES NOT INCLUDE ANY ADDITIONAL LABOR ALLOWANCE OR OTHER COSTS  
incurred for diagnosis, repairing, removing, installing, shipping, servicing, or handling of either defective parts or  
replacement parts. SUCH COSTS MAY BE COVERED BY a separate warranty provided by the installer.  
LIMITATIONS OF WARRANTIES — ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF  
MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH THE LIMITED  
WARRANTY IS GIVEN. THE EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE  
AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER  
PERSON WHATSOEVER.  
CARRIER WILL NOT BE RESPONSIBLE FOR:  
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. Normal maintenance as outlined in the installation and servicing instructions or owner’s manual.  
. Damage or repairs required as a consequence of faulty installation or application by others.  
. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other damages due to the  
inadequacy or interruption of electrical service.  
4. Damage or repairs needed as a consequence of any misapplication, abuse, improper servicing, unautho-  
rized alteration, or improper operations.  
5. Damage as a result of floods, winds, fires, lightning, accidents, corrosive atmosphere, or other conditions  
beyond the control of CARRIER CORPORATION.  
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. Parts not supplied or designated by CARRIER CORPORATION.  
. CARRIER CORPORATION products installed outside the continental U.S.A., Alaska, Hawaii, and Canada.  
. Electricity or fuel costs or increases in electricity or fuel costs from any reason whatsoever including addi-  
tional or unusual use of supplemental heat.  
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. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY  
NATURE WHATSOEVER. Some states do not allow the exclusion of incidental or consequential damages,  
so the above limitation may not apply to you.  
Model No.  
Unit Serial No.  
Date of Installation  
Name of Owner  
Installed by  
Address of Installation  
3
1106  
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Manufacturer reserves the right to  
discontinue, or change at any time,  
specifications or designs without notice  
and without incurring obligations.  
REPLACEMENT COMPONENTS DIVISION  
CARRIER CORPORATION 1106 6-01  
PRINTED IN U.S.A.  
LITERATURE NUMBER P274-6SO  
REPLACES: NEW  
©
CATALOG NO. 570-458  

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