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OWNER'S MANUAL

P/N P374-2300FM

Programmable

Digital Thermostat

Mounts flush to the wall
7 Day Programmable
3 Occupied, 1 Unoccupied
Auto-Changeover 
Large, Easy To Read Display
Thermoglow    Backlight
Remote Sensor Ready
Dry Contact Equipped
Energy Saving Smart Fan
Fan Purge, IAQ Feature
Includes Locking Cover

Replacement Components Division      Carrier Corporation 11/06

1 For All

Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & Gas Heating, Heat Pump, Electric or Hydronic Heat. 

Meets California Title 24

OVERRIDE

MODE

Am

OFF

Mo

I2:00

TOTALINE

Summary of Contents for 1 For All

Page 1: ...Backlight Remote Sensor Ready Dry Contact Equipped Energy Saving Smart Fan Fan Purge IAQ Feature Includes Locking Cover Replacement Components Division Carrier Corporation 11 06 1 For All Use with most Air Conditioning Heating Systems including 1 or 2 Stage Electric Cooling Gas Heating Heat Pump Electric or Hydronic Heat Meets California Title 24 OVERRIDE MODE Am OFF Mo I2 00 TOTALINE ...

Page 2: ...SETUP ABOUT ADVANCED FEATURES OPERATION WARRANTY P N P374 2300FM 2 3 6 8 9 14 19 26 Replacement Components Division Carrier Corporation 11 06 Page 1 13 CAUTION Follow Installation Instructions carefully DISCONNECT POWER TO THE HEATER AIR CONDITIONER BEFORE REMOVING THE OLD THERMOSTAT AND INSTALLING THE NEW THERMOSTAT WARNING SELECTING THE HEAT OR COOL MODE 7 ...

Page 3: ...Front Panel Liquid Crystal Display with Thermoglow Up Down Buttons Mode Button Override Button Heat or Cool Indicator Red Heat Green Cool Temperature Sensor Page 2 ...

Page 4: ...FF Indicates heating and cooling are turned off Clock with Day of the Week Page 6 Indicates the current time and day This clock is also used to program the time period schedules Room Temperature Display Indicates current room temperature and displays the outside temperature when selected page 17 Desired Set Temperature Page 8 Indicates desired room temperature s Display 88 88 88 unoccupied Program...

Page 5: ... program is currently being overridden for up to four hours Occupied Unoccupied icons Pages 9 12 Indicates the program number Occupied 1 2 3 or Unoccupied Setup icon Pages 14 18 Indicates the thermostat is in the advanced setup mode Fan On icon Page 14 Indicates constant continuous fan operation When Fan On is not lit indicates the fan will only operate when necessary to heat or to cool ...

Page 6: ...p SuMoTuWeThFrSa 123 I2 00 Display Page 5 Service Filter icon Page 16 Appears when the filter should be serviced under normal conditions Adjustable from 0 1950 hours or blower operation Locked icon Page 24 Indicates keypad has been locked Start Stop icons Pages 10 11 Appear when programming occupied time periods ...

Page 7: ...he instructions in the Advanced Setup section The thermostat is not preprogrammed from the factory to operate electric heat or heat pump systems To control these systems follow the steps in the Advanced Setup section pages 14 15 Press MODE Page 6 Setting the Clock Setting the Clock Setting the Day Setting the Day MODE OVERRIDE MODE OVERRIDE Am Setup I2 00 Setup Mo Tip To change hours quickly press...

Page 8: ... to heat the room Heating Only The COOL setting indicates the temperature the room has to reach before the air conditioner will turn on to cool the room Cooling Only OFF indicates both heating and air conditioning systems are turned off Off AUTO will automatically select heat or cool based on room temperature demand Heating or Cooling Time Schedule for Heating or Cooling Program On will activate t...

Page 9: ... or DOWN buttons in Auto or Program mode will adjust both the heat and cool set temperatures simultaneously buttons Adjust the desired set temperature with the 70 76 Pm COOL Mo I2 00 HEAT OR COOL MODE Pressing the UP or DOWN buttons in Heat or Cool mode will adjust only the heat or cool set temperature buttons Adjust the desired set temperature with the ...

Page 10: ...he UP button for two seconds to enter time period programming MODE Select the maximum of occupied periods to be used on any one day Typically most installations use only Occupied 1 1 2 or 3 Adjust the cooling setpoint for Occupied 1 35 99 OF Adjust the heating setpoint for Occupied 1 OF 35 99 Adjust the cooling setpoint for unoccupied periods 35 99 OF Use the Programming Worksheet on the back cove...

Page 11: ... 1 Occupied Am Start Mo 1 7 00 Occupied Pm Stop Mo 1 6 00 Occupied ON Mo 1 Page 10 85 COOL Select the day for Occupied 1 Mo Su Select Occupied 1 to run on this day On or not to run on this day Off Off On Adjust the heating set point for Unoccupied periods OF 35 99 Adjust the start time for Occupied 1 Adjust the stop time for Occupied 1 ...

Page 12: ...or Occupied 1 Tu Su Adjust the stop time for Occupied 1 Adjust the start time for Occupied 1 Yes No Select Yes to copy the previous day s program to the day displayed Selecting Yes then pressing MODE will copy the previous day s program If yes is selected again or each time this routine will repeat The copy command becomes available after the maximum of occupied periods are programmed in a day Thi...

Page 13: ... the Occupied 1 period is selected in the first programming step page 9 Occupied 2 3 programming steps are skipped Furthermore if Occupied 2 is selected Occupied 3 programming steps are skipped Heat Cool setpoints for Occupied 1 are the same for every day of the week If desired Heat Cool setpoints for Occupied 2 3 can be adjusted differently for each day of the week If the start time is set later ...

Page 14: ...hermostat to the correct time period program for the day Occupied Operation During programmed occupied periods a press of the OVERRIDE button will force the thermostat into an unoccupied period for the remainder of the day During this forced unoccupied period the OVERRIDE button will operate as described above The OVERRIDE button may be used to interrupt the normal time schedule programming of the...

Page 15: ...e display for easy reference Tip To change hours quickly press and hold the OVERRIDE button and press the UP or DOWN buttons Fan On Fan Auto On Off MODE MODE MODE MODE I Am Setup I2 00 2 Setup Mo 3 AUTO Setup Hp 4 OFF Setup Page 14 MODE OVERRIDE Press the MODE and OVERRIDE buttons at the same time for 10 seconds to enter Advanced Setup screens ON Heat Pump operation OFF Gas Electric operation ...

Page 16: ...age 15 Step 6 only appears if heat pump is off in step 4 Adjust the deadband for the 1st stage 1 6 Adjust the minimum difference between cooling heating setpoints 0 6 d1 d 2 6 Select the cycles per hour limit d cycles per hour limit defeated d1 d defeat 5 min compressor lockout Select the reversing valve polarity for Heat Pump operation O Energize in cooling b Energize in heating Step 5 only appea...

Page 17: ...DE MODE I0 Setup 0 00 I i ON Setup I2 Service Filter Setup 0 I3 Service Filter Setup 0 0 I4 Start Setup Sof Page 16 Select backlight operation ON Light continuously OFF Light for 8 seconds after a button press Reset the counter to 0 to remove the Service Filter icon from the display 0 1950 hours Adjust the number of hours in increments of 50 the fan will run before the Service Filter icon appears ...

Page 18: ...etpoint changes Adjust the maximum allowable heat setpoint when security is in effect Step 18 only appears if step 17 is not 0 Press Continued C F Yes No MODE MODE MODE MODE F I5 Setup I6 Setup O I7 Locked Setup Sec 80 i8 HEAT Locked Setup hi Page 17 To view Outside or Duct sensors press and hold the MODEbutton Optional Remote Sensor YES Control to Remote Room Sensor NO Read Only Outside or Duct S...

Page 19: ...er 30 seconds 24 hour Mo Su Auto On Off On O b Off On 1 6 0 6 d d1 2 6 0 00 3 00 Off On read only 0 1950 0 99 F C Yes No 0 3 35 99 35 99 12 00 am Mo Auto Off O Off 2 2 6 0 00 On 0 0 F No 0 80 65 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Time of Day Day of the Week Fan Operation Heat Pump Reversing Valve Polarity Electric Heat Deadband Temp Swing 1st Stage Minimum Heat Cool Differential Cycle...

Page 20: ... setpoint plus the 1st stage deadband step 7 page 15 This 1st stage deadband is adjustable from 1 6 degrees and the default is two degrees CALIBRATION Under normal circumstances it will not be necessary to adjust the calibration of the temperature sensor If calibration is required please contact a trained HVAC technician to correctly perform the following procedure Place the thermostat in the OFF ...

Page 21: ... forced into Occupied 1 setpoints and the Occupied 1 icon will blink page 9 Note The thermostat must be in Program On mode for this feature to have any effect ELECTRIC HEAT Selecting Electric Heat step 6 page 15 will cause the thermostat to turn on the fan immediately any time there is a heat demand Since most gas furnaces control the fan this feature should be off unless it is necessary for the t...

Page 22: ...ergency Heat the 1st stage of heating or cooling will be unavailable Exit Emergency Heat Follow the same steps as entering Emergency Heat by pressing the OVERRIDE and UP buttons During Emergency Heat only OFF and HEAT modes are available by pressing the MODE button ENERGY SAVING SMART FAN This feature allows the fan to run continuously during Occupied 1 2 or 3 and automatically de energizes during...

Page 23: ... FAN PURGE TIMER When this feature is activated the fan will turn on during an unoccupied period at a preset amount of time prior to Occupied 1 This preoccupancy fan purge timer may be set from zero to three hours in 15 minute increments Zero means this feature is turned off HEAT COOL DIFFERENTIAL The Heat and Cool setpoints will not be allowed to come any closer to each other than the value set i...

Page 24: ...pied ProgramOn Pm COOL HEAT Mo 1 I2 00 0 99 days Holiday Display When the thermostat is placed into the Holiday mode the thermostat will display the screen shown below To return the thermostat to normal operation from Holiday mode follow the steps above and adjust the number of days to zero hol Overriding the Holiday Mode Pressing the OVERRIDE button during Holiday Mode will temporarily force the ...

Page 25: ...will disappear from the display then release the buttons 72 76 68 occupied Program Fan On On Pm COOL HEAT Locked Mo 1 I2 00 SOFT START This feature is utilized on job sites where multiple thermostats and installed controlled by a Central Time Clock via the thermostat Dry Contact terminals Assigning a unique Soft Start number to each thermostat will stagger the turn on times even though the Dry Con...

Page 26: ...tton on the front panel of the thermostat Each press of the remote OVERRIDE button adds 2 hours to the override timer If the timer was already active the first button press will round the runtime to either 2 00 or 4 00 Subsequent button presses will not wraparound as the Override button on the Instead every subsequent button press will thermostat does OVER RIDE OVER RIDE Page 25 set the runtime to...

Page 27: ...RSON WHATSOEVER ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS ALL REPLACEMENT PARTS WHETHER NEW OR REMANUFACTURED ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS WARRANTY THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR 1 Normal maintenance as outlined in the installation and servicing instructions or owner s manual including filter cle...

Page 28: ... D A Y Copy Mon Tue M O N D A Y T U E S D A Y DAY PERIOD HEAT START TIME COOL Unoccupied Occupied 1 Occupied 2 Occupied 3 Unoccupied Occupied 1 Occupied 2 Occupied 3 Unoccupied Occupied 1 Occupied 2 Occupied 3 Unoccupied Occupied 1 Occupied 2 Occupied 3 Unoccupied Occupied 1 Occupied 2 Occupied 3 Unoccupied Occupied 1 Occupied 2 Occupied 3 Unoccupied Occupied 1 Occupied 2 Occupied 3 Programming Wo...

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