Carrier P374-1500 Owner's Manual

Configurable for advanced heat pump or dual fuel operation

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OWNER'S MANUAL

Programmable Thermostat

Configurable for

Advanced Heat Pump or

Dual Fuel Operation

6:03

OOL

AUTO

EAT

3 HEAT - 2 COOL

HEAT

PUMP

TOTALINE

Can be configured for Dual Fuel operation (Heat Pump & Furnace).

Replacement Component Division

P/N P374-1500

7 Day Programmable

4 Time periods

Thermoglow

Backlight

Advanced Heat Pump

Dual Fuel Configurable

Using Outdoor Sensor

Adjustable Times and

Deadbands Between

Stages

Adjustable Changeover

Balance Point

DUAL

FUEL

Carrier Corporation 6/99

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Summary of Contents for Carrier P374-1500

Page 1: Programmable Thermostat
OWNER'S MANUAL P/N P374-1500 Programmable Thermostat Configurable for Advanced Heat Pump or Dual Fuel Operation 7 Day Programmable 4 Time periods Thermoglow Backlight Advanced Heat Pump 6:03 Dual Fuel Configurable AUTO Using Outdoor Sensor Adjustable Times and Deadbands Between Stages...
Page 2: Table Of Contents
4 Time Periods ADVANCED SETUP ABOUT ADVANCED OPERATION WARRANTY CAUTION Follow Installation Instructions before proceeding. SET THERMOSTAT TO MODE “OFF” PRIOR TO CHANGING SETTINGS IN SETUP OR RESTORING FACTORY DEFAULTS. Replacement Components Division Carrier Corporation 6/99 P/N P374-1500 Page 1...
Page 3: Front Panel
Front Panel Backlit LCD Display Warmer or + Button 6:03 AUTO Cooler or - Button Mode Button Heat or Cool Indicator Red = Heat, Green = Cool Programmable Thermostat 6:03 AUTO OUTSIDE VACATION PROGRAM SET CLOCK MODE OUTSIDE VACATION PROGRAM SET CLOCK Page 2...
Page 4: Display
Display 12:00 Program Setup Start Locked unoccupied SMTWTFS ServiceFilter AUTO Outside Night Morning Evening Fan On Mode Indicators Selects the operation mode of the equipment. HEAT - indicates the heat mode. COOL - indicates the air conditioning mode. AUTO - indicates the system will automatically changeover between heat and cool modes as the temperature varies.
Page 5 Display Outside Indication Indicates the temperature displayed is from the optional outside sensor. Page 21. Morning, Day, Evening & Night Indication Indicates the program time period. Page 8-11. Setup Indication Indicates the thermostat is in the programming mode. Page 12. Fan Operation Indication Fan On - indicates constant, continuous fan operation.
Page 6: Quick Start
Quick Start Set the Clock and Go During Setup & Programming: SET CLOCK Press the SET CLOCK Pressing the Up and Down button. buttons will modify the flashing selection. 12:00 (Represented in dark black) Setup To adjust the Press clock or Day use MODE Setup buttons.
Page 7: Basic Operation
Basic Operation Select Mode 12:00 The HEAT setting indicates the temperature the room has to reach before the furnace will Press MODE turn on to heat the room. 12:00 The COOL setting indicates the temperature the room has to reach before the air conditioner will turn on to cool the room.
Page 8: Select Desired Temperature
Basic Operation Select Desired Temperature In any mode, adjust the desired Set Temperature 12:00 with AUTO buttons. Pressing the up/down buttons in Auto mode will adjust both the heat and cool set temperatures simultaneously. Pressing the up/down buttons in Heat or Cool modes will adjust only the heat or cool set temperature.
Page 9: Programming
Programming 4 Time Periods Press Press the PROGRAM button to enter time period programming. PROGRAM Use the back cover Programming Worksheet to help with this section. Select the day of week (M - S) Press MODE 7 30 Start Adjust the start time for Morning.
Page 10 Programming 4 Time Periods I0 30 Start Adjust the start time for Day. Press MODE I0 30 Adjust the cooling setpoint for Day. (35 - 99 ) Press MODE I0 30 Adjust the heating setpoint for Day. (35 - 99 ) Press MODE 5 30...
Page 11 Programming 4 Time Periods 5 30 Adjust the heating setpoint for Evening. (35 - 99 ) Evening Press MODE I I 30 Start Adjust the start time for Night. Night Press MODE I I 30 Adjust the cooling setpoint for Night. Night (35 - 99 ) Press...
Page 12 Programming 4 Time Periods The copy command becomes available after programming the entire previous day. 18:no Select Yes or No to copy the previous day’s program to this day. If No is selected: If Yes is selected: Selecting Yes, then pressing mode will copy the previous day’s program and then will ask the Press same copy question again.
Page 13: Advanced Setup
Advanced Setup Before entering Advanced Setup, use the Mode button to place the unit in OFF. These steps are normally set up by the installer. Setting these values incorrectly may result in improper operation. Setup steps 1 & 2 are found in the clock set section.
Page 14 Advanced Setup 86 I Setup Adjust the deadband for the 1st stage. (1 - 6) Press MODE 86 2 Setup Adjust the deadband for the 2nd stage. (0 - 10) Press MODE 86 3 Setup Adjust the deadband for the 3rd stage. (0 - 10) Press MODE...
Page 15 Advanced Setup Setup Adjust the minimum difference between cooling & heating setpoints. Press (0 - 6 ) MODE Select the cycles per Setup hour limit. d=cycles per hour limit defeated. d1=d + defeat 5 min. Press Compressor lockout. MODE (d, d1, 2 - 6) 0:00 Setup Adjust the programmable...
Page 16 Advanced Setup Setup Select the display back- light always On, or Off after 8 seconds. Press MODE Setup Press Reset the Energy Watch Heat demand hour counter. HEAT Press MODE Setup Press Reset the Energy Watch COOL Cool demand hour counter. Press MODE Setup...
Page 17 Advanced Setup Setup Select thermostat operation in degrees Fahrenheit or Centigrade. Press PROGRAM To Exit Advanced Setup Table Step # Description Range Factory Default Time of day clock set 24 hour 12:00 Am Day of the week Sun - Sat Monday Reversing Valve polarity O / B...
Page 18: About Advanced Operation
About Advanced Features & Operation DUAL FUEL Vs. ADVANCED HEAT PUMP - Advanced Setup Step # 4 allows this thermostat to be configured to control 2 heat sources (Dual Fuel) or, to have maximum flexibility in controlling multi-stage heat pumps (Advanced Heat Pump). Dual Fuel systems utilize an outdoor temperature sensor.
Page 19 About Advanced Features & Operation MULTI-STAGE OPERATION - Control up to 3 Heat, 2 Cool Stages. The 2nd Stage of heat or cool is turned on when: (A) the 1st Stage has been on meeting time required page13 ,#10 (adjustable from 0-60 minutes, the default is 2) and (B) the temperature spread from the setpoint is equal to or greater than: the setpoint...
Page 20 About Advanced Features & Operation PROGRAMMABLE FAN - If the Programmable Fan timer is set to a value other than 0:00, the fan will run for the preprogrammed amount of time, page 14, step# 14. The Programmable Fan timer will start the fan at the top of each hour.
Page 21 About Advanced Features & Operation DUAL SETPOINT BEHAVIOR - The adjustable setpoint range is: 35 - 99 degrees in Fahrenheit and 7 - 35 degrees in Centigrade. When in the modes Heat or Cool, this adjustable range is unhampered. When adjusting any Auto mode, including programming 4 Time periods, the thermostat will not allow the Heat setpoint to get closer to the Cool setpoint...
Page 22 About Advanced Features & Operation OUTDOOR SENSOR (Optional Accessory) - When connected to terminals RS+5, RS1, & RS GND on the back of the thermostat, the thermostat will read the temperature from the Outdoor Sensor when asked to. This thermostat will not control to this sensor, it is only to read outside temperature.
Page 23 About Advanced Features & Operation KEYPAD LOCK - T o prevent unauthorized use of the thermostat, the front panel buttons may be disabled. To disable, or ‘lock’ the keypad, press and hold in the Mode button. While holding the Mode button in, press the Up and Down buttons in together.
Page 24 About Advanced Features & Operation VACATION MODE - Continued Press the Up or Down buttons to select the number of days the thermostat will be in Vacation mode. 0 = Off. To exit Vacation setup, press the Vacation button. Press the Vacation button again to return to normal operation using the default Unoccupied settings of 85 &...
Page 25 Programming Worksheet see page 8 DAY PERIOD START TIME COOL HEAT Morning Evening Night Morning Copy Mon Evening Night Morning Copy Tue Evening Night Morning Copy Wed Evening Night Morning Copy Thu Evening Night Morning Copy Fri Evening Night Morning Copy Sat Evening Night...
Page 26: Warranty
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Carrier P374-1500 Owner's Manual

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Programmable Thermostat

Dual Fuel Operation

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Summary of Contents for Carrier P374-1500

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