TOTALINE P274-1100, P274-1200, P274-1300, Gold P274-1100, Gold P274-1200 Owner's Manual
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OWNER’S
MANUAL
Part Numbers P274-1100, 1200, 1300
As an ENERGY STAR® Partner, Carrier Corporation
has determined that this product meets the
ENERGY STAR guidelines for energy efficiency.
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IMPORTANT: Read entire instructions before programming the thermostat.
GENERAL
The Totaline® 7-day programmable thermostats are wallmounted, low-voltage thermostats which maintain room tem
perature by controlling the operation of an HVAC (heating,
ventilation and air conditioning) system. Separate heating and
cooling settings and auto-changeover capability allow setback
of programming schedules for energy savings.
All thermostats allow up to 4 time/temperature settings to
be programmed per 24-hour period. Each thermostat stores
programs for 7 independent days. Batteries are not required.
During power interruption the internal memory stores pro
grams for an unlimited time and the clock continues to run for
at least 72 hours.
The Energy Star logo indicates this thermostat is designed
to significantly improve heating and cooling comfort levels
while reducing the cost to heat and cool indoor air space.
THERMOSTAT 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, AUTO, or EHEAT [P274-
1200,1300 models only])
• fan setting (ON or AUTO)
• hold status
• auxiliary heat status (AUX HT [P274-1200,1300 models
only])
• room temperature
• desired temperature
• clean filter status
• time of day
• day of the week
Programming the Thermostat — The thermostat has
programming buttons which allow time and temperature to be
entered into the thermostat. The programming buttons are be
hind the thermostat cover. To access the programming buttons,
pull on the hinged thermostat cover. See Fig. 1. The program
ming buttons are: Copy Previous Day , Program, Mode, Change
Day, End Program, Fan, Set T ime, Reset Filter , and Hold.
The Up and Down buttons are used to change the current,
desired temperature set point and to scroll through program
ming settings. The Up and Down buttons are accessible from
the outside of the thermostat.
Residential
Programmable
Thermostat
The daily schedule can be overridden in 2 ways: pressing
the Hold button or pressing the Up and Down buttons to
change the temperature set point.
HOLD BUTTON — Pressing the Hold button disables the
time and temperature schedule and holds the current desired
temperature set point. When a Hold is active, the HOLD
annunciator is displayed on the thermostat screen. The Hold
will remain active indefinitely. While HOLD mode is active
the set points can be adjusted and will remain at last changed
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set point in HOLD mode for as long as HOLD mode remains
active. To release the Hold, press the Hold button a second
time.
FAN BUTTON — The Fan button selects fan operation.
When the fan is set to ON, the fan will run continuously for
improved air circulation. When the fan is set to AUTO, the fan
will run during heating and cooling operation only.
MODE BUTTON — 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 tempera
ture 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 settings. Heat
pump thermostats also have an EHEAT selection. If EHEAT is
configured by installer, the unit will use the second stage of
heating to provide heating if necessary. The annunciator for
each selection will be displayed on the thermostat when
selected.
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.
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.
SMART RECOVERY (HEATING MODE) — The smart
recovery function is designed to save energy by gradually
adjusting temperatures to meet scheduled set points. The Smart
Recovery function begins 1 to 1.5 hours before a scheduled set
point increase and gradually adjusts room temperature so the
temperature is at the new set point when the time period
begins. This is more efficient than making the system run at
full capacity until the desired temperature is met.
NOTE: Smart recovery does not apply to cooling operation.
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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 LITERATURE NUMBER P274-4SO
© CARRIER CORPORATION 1106 6-01 REPLACES: New
PRINTED IN U.S.A. CATALOG NUMBER 570-203
*Auxiliary Heat Indicator
lights up when a heat
pump system’s auxiliary
heat is on.
Mode Button selects
OFF, HEAT, COOL or
AUTO operation. Heat
pump thermostats
include EMERGENCY
HEAT mode.
Program Button starts
programming process
and moves you from
one step to the next.
Copy Previous Day
Button “memorizes” the
current day’s comfort
schedule and copies it into
the next day’s schedule.
Change Day Button
advances you to the
next day to be
programmed and
advances the day of
the week display.
End Program Button “locks
in” the most recently entered
temperatures and schedule.
Outdoor Temperature
Display shows the outdoor
temperature.
WAKE DAY EVE SLEEP
Mo Tu We Th Fr
Sa Su
TIME
COOL
AUX HT
HEAT
PROGRAMMING
CLEAN FILTER
AM PM
Hold Button maintains the
current temperature and
overrides programmed
temperature changes until reset.
Set Time
Buttom
Room Temperature
Display shows current
room temperature.
Programmable
Thermostat
PROGRAMCOPY PREVIOUS DAY
PROGRAM
ENDCHANGE DAY
Reset Filter Button
restarts the timer that
determines the next air
filter change or cleaning.
Mode
OFF
EHEAT
COOL
AUTO
Fan
ON
AUTO
MODE
FAN
HOLDRESET FILTERSET TIME
HOLD
Fig. 1 — Thermostat Display and Programming Buttons
Desired Temperature
Display shows desired
temperature for current
time period.
Time of Day Display
Clean Filter Indicator
lets you know it is time to
clean or replace your
system’s air filter.
Up and Down Buttons
change the desired
temperature setting, turn on
the LCD backlight, are used
for programming and, on
selected models, access
outdoor temperature.
Fan Button
chooses ON or
AUTO fan
operation.
Set Current Day — The Change Day button will change
the day shown on the thermostat display to the next day. If a
schedule has been entered, the thermostat will follow the
schedule of the new selected day .
Set Current Time — The Set Time/Temp button allows
the user to change the time displayed on the thermostat. Press
the Set Time button. The TIME indicator will flash. Press the
Up and Down buttons until the correct time is shown. Hold
down the buttons to quickly move through the time display.
The AM and PM indicators will automatically change. To en
sure the schedules are properly followed, make sure that AM or
PM is correct for the time chosen. When the correct time is
shown, press the End button to exit the Set Time mode.
Set Mode Operation — The Mode button selects the
operation of the system (OFF, HEAT, COOL, AUTO). Press
the Mode button to select the desired setting. Heat pump ther
mostats also include Emergency Heat (EHEAT) mode.
Set Fan Operation — The Fan button will allow the
system fan to run continuously or only as desired during heat
ing and cooling.
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Programming Thermostat Schedules — Be-
fore programming the thermostat, plan the thermostat daily
schedule. The schedule is divided into 4 time periods
(WAKE, DAY, EVENING, SLEEP). Each time period has a
start time, heating set point, and cooling set point. Fill in Ta
ble 1 below as an aid to programming the daily schedules.
PROGRAMMING MODE — To program the daily schedules, perform the following procedure:
1. Enter Programming mode by pressing the Program
button. The PROGRAMMING indicator will appear
on the thermostat display. The current day of the
schedule will be displayed above the clock and the cur
rent programming time period of that day will be displayed. The TIME indicator will flash.
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NOTE: If a programming button is not pushed for 2 minutes,
the thermostat will exit Programming mode and any changes
made will be saved.
2. Press the Up and Down buttons to set the desired start
time for the schedule day and period shown. Time
selection is in 15-minute increments.
3. Press the Set Time button once the correct time is
shown. The TIME indicator will stop flashing and the
HEAT indicator will fl ash.
4. Using the daily comfort schedule as a guide, program
the heating and cooling settings. The HEAT and
COOL indicators will flash for the heating and cooling
settings respectively. The Set Time button is used to
toggle between the time, heating, and cooling settings.
Use the Up and Down buttons to raise and lower the
temperature set points.
NOTE: There must be at least 2 degrees difference between
the cooling and heating settings. The thermostat will automati
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cally change any settings closer than 2 degrees.
5. Press the Program button to advance to the next time
period.
6. Perform Steps 2 through 5 until the times and temperature settings have been entered for the entire day. Press
the Change Day button to move to the schedule for the
next day.
7. Repeat Steps 2 through 6 to program the remaining
schedule days. The Copy Previous Day button can be
used to copy the previous day’s schedule if the sched
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ules are the same.
8. After all the times and settings for each day have been
entered, press the End Program button to finish enter
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ing the schedule.
NOTE: The thermostat will continue to follow the schedule
until a new one is entered. The schedule may need to
be updated for different seasons or prolonged changes in
temperature.
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