Page 2 - WIRING; CAUTION; Disconnect power before wiring.
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 69-1670 2 Fig. 1. Typical location of thermostat. 1. Position and level the wallplate (for appearance only). The thermostat functions correctly even when not level. 2. Use a pencil to mark the mounting holes. See Fig. 2. 3. Remove the wallplate...
Page 3 - IV DELUXE PROGRAMMABLE THERMOSTATS; Fig. 4. Typical hookup in heat and cool system; Mounting Thermostat; Press lower edge of case to close and latch.
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 3 69-1670 Fig. 4. Typical hookup in heat and cool system with one transformer. Fig. 5. Typical hookup in heat and cool system with two transformers. Fig. 6. T8602 typical millivoltage heating circuit. . Fig. 7. Correct wiring technique. Mountin...
Page 4 - Using Thermostat Keys; SETTINGS; System and Fan Settings; Temperature Settings; Period
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 69-1670 4 Using Thermostat Keys The thermostat keys are used to:• set current day and time,• program times and setpoints for heating and cooling,• temporarily override program temperatures, • display present setting, • configure Installer Setup...
Page 5 - FAN OPERATION SWITCH; Fig. 13. Display of Installer Setup number and; IMPORTANT; Return; Hold for
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 5 69-1670 FAN OPERATION SWITCH The thermostat fan operation switch, labeled FUEL SWITCH in Fig. 11 is factory set in the F position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to E. T...
Page 8 - Setting Current Day and Time
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 69-1670 8 Setting Current Day and Time 1. Press Set Current Day/Time. NOTE: On initial powerup or after an extended power loss, 1:00 pm flashes on the display until a key is pressed. 2. Press Day until the current day is displayed. NOTE: Sun=Su...
Page 9 - INSTALLER SYSTEM TEST
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 9 69-1670 INSTALLER SYSTEM TEST Use the Installer System Test to check the thermostat operation. Refer to Table 4 for a list of the available system tests. CAUTION Equipment Damage Hazard. Minimum compressor off-time is bypassed during Installe...
Page 10 - THERMOSTAT INFORMATION; Press the Time; CHECKOUT; Outdoor Temperature Sensor
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 69-1670 10 THERMOSTAT INFORMATION 1. Press the Time ∆ key to access the thermostat information. 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...
Page 11 - TROUBLESHOOTING GUIDE; Symptom
T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS 11 69-1670 TROUBLESHOOTING GUIDE Table 6. Troubleshooting Guide. Symptom Possible Cause Action Display does not come on. Thermostat is not being powered. • Check if batteries are present and installed correctly. — If batteries are present and i...
Page 12 - Verify operation of heating or cooling equipment in self-test.
69-1670 G.H. 1-03 www.honeywell.com/yourhome T8602C CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. Automation and Control Solutions Honeywell International Inc Honeywell Limited-Honeywell Limitée 1985 Douglas D...