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T8601D Chronotherm® IV Deluxe
Programmable Thermostats
INSTALLATION INSTRUCTIONS
APPLICATION
stage heating and cooling systems. Refer to Table 1 for a
general description of the thermostat. All T8601
The T8601 Chronotherm® IV Deluxe Programmable
thermostats require a common wire to supply power.
Thermostat provides electronic control of 24 Vac single-
Table 1. Description of T8601 Thermostats.
T8601 System Changeover System Selection Fan Selection Comments
D Heat-Cool Automatic Heat-Off-Cool-
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS NO YES NO 5 FEET NO [1.5 METERS] M10106 Fig. 1. Typical location of thermostat. 3. Remove the wallplate from the wall and drill two Wallplate Installation 3/16 in. holes in the wall (if drywall) as marked. For The thermostat can be mounted horizontally on the wall firmer material such as plaster, drill two 7/32 in. or on a 2 in. x 4 in. wiring box. Position wallplate holes. Gently tap anchors (provided) into the drilled horizontally on
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS FOR WRAPAROUND FOR STRAIGHT INSERTION THERMOSTAT INSERTION STRIP STRIP 5/16 IN. (8 MM). C YG O B W R OT OT 7/16 IN. (11 MM). 3 HEAT COMPRESSOR COOL OUTDOOR M4826 2 CONTACTOR DAMPER RELAY TEMPERATURE SENSOR Fig. 6. Proper wiring technique. FAN HEAT RELAY DAMPER 2 L1 (HOT) Mounting Thermostat L2 1. Engage tabs at the top of the thermostat and wall- 1 TRANSFORMER plate. See Fig. 7. 2. Press lower edge of case to close and latch. 1 POWER SUPPLY
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS configure Installer Setup, Using Thermostat Keys check Self-Test, display outdoor temperature (select models), The thermostat keys are used to: set the system operation, set current day and time, set the fan operation. program times and setpoints for heating and cooling, temporarily override program temperatures, See Fig. 8 for the location of the keys. display present setting, INCREASE TEMPERATURE SET LEAVE TIMES SET
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS Temperature Settings Wait Set Program Set Day/Time Temporary Setting Refer to Table 2 for the default program. If the daytime Em Heat Recovery AM Off energy savings period is not used, press the period key Cool Hold for (Leave or Return) until the time is blank. The fan setting PM Auto feature is available on select thermostat models. See Filter Em Ht Aux Ht Days Fan F Owners Guide, form number 69-0940, for complete Repl Batt Room Outdo
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS Table 3. Thermostat Installer Setup Options. Installer Setup Other Choices Number Factory-Setting (Press ! or " key to change) (Press Time ! Actual Select key to change) Display Description Display Description Setting Not used 1 a 2 0 Conventional application 1 Heat pump or electric Fan operation where equipment control heat applications where fan operation in heat mode thermostat controls fan operation in heat mode Not used 3
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS Table 3. Thermostat Installer Setup Options. Installer Setup Other Choices Number Factory-Setting (Press ! or " key to change) (Press Time ! Actual Select key to change) Display Description Display Description Setting Temperature 34 90 Highest heating setpoint 40 to 89 Temperature range (1°F range stops in setting. increments) of heating heating setpoint settings. Temperature 35 45 Lowest cooling setpoint 46 to 99 Temperature range (1°F
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS 4. Press Run Program. Setting Current Day and Time 1. Press Set Current Day/Time. System Heat AM NOTES: On initial power up or after an extended power Time Set Program Run Set Current Wake Leave Return Sleep Run Program Day/Time loss, 1:00 pm flashes on the display until a key Fan Heat/Cool Tue Room Program Hold Temp Day Settings System Fan Wake DST Auto is pressed. Daylight Copy Time M14623 Set Day/Time Viewing or Resetting Timer Settings
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS INSTALLER SELF-TEST Use the Installer Self-Test to check the thermostat oper- Refer to Table 5 for the directions and results of the ation. Refer to Table 4 for a list of the available self-tests. specific tests. NOTE: Press Time ∆ to advance to the next test and Time ∇ to go back to the previous test. Press CAUTION Run Program to exit the self-test. Equipment Damage Hazard. Minimum compressor off-time is bypassed during Installer Sys
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T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS THERMOSTAT INFORMATION 1. Press the Time ∆ to access the thermostat 4. Press the increase ! key again to display the information. software revision number. (Example: 001= Revision number 1). M14613 M14616 2. Press the increase ! key to display the production date code. The first two large digits are the month and the third digit is the last digit of the year. 5. Press the increase ! key again to display the (Example: 02
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TROUBLESHOOTING GUIDE Refer to Table 6 for troubleshooting information. Table 6. Troubleshooting Guide. Symptom Possible Cause Action Display does not Thermostat is not being Check that C terminal is connected to the system transformer. come on. powered Check for 24 Vac between R and C terminals. If missing 24 Vac: check if the circuit breaker is trippedreset the circuit breaker. check if the system fuse is blownreplace the fuse. check if the power switch on the HVAC equipment is
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Table 6. Troubleshooting Guide. Symptom Possible Cause Action Cooling does not No power to the thermostat. Check that C terminal is connected to the system transformer. come on. Check for 24 Vac between R and W terminals. If missing 24 Vac: check if the circuit breaker is trippedreset the circuit breaker. check if the system fuse is blownreplace the fuse. check if the power switch on the HVAC equipment is in the Off positionset to the On position. check wiring between thermosta
