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®
T8611G Chronotherm IV
Deluxe Programmable
Heat Pump Thermostats
INSTALLATION INSTRUCTIONS
APPLICATION
The T8611G Chronotherm® IV Deluxe Programmable Refer to Table 1 for a general description of the
Heat Pump Thermostats provides electronic control of 24 thermostat. All T8611 thermostats require a common wire
Vac single-zone heat pump systems. to supply power.
Table 1. Description of T8611 Thermostats.
T8611 Changeover System Selection Fan Selection Comments
G Automatic Em Heat-Heat-Off-Cool
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS 4. Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat. THERMOSTAT O/B X1 X2 L OT OT C Y1 G E W2 W1 R NO YES EQUIPMENT HEAT FAN RELAY RELAY NO MONITOR 2 2 5 FEET COOLING OR EQUIPMENT NO [1.5 METERS] HEATING CHANGEOVER MONITOR 1 VALVE OUTDOOR SENSOR COMPRESSOR CONTACTOR EM. HT. HEAT 1 RELAY RELAY L1 1 (HOT) M10106 L2 TRANSFORMER 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROT
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS System settings control the thermostat operation: Using Thermostat Keys (Fig. 6) Em Heat: Emergency heat relay is on continuously. Thermostat cycles highest stage of heat. Cooling The thermostat keys are used to: system is off. Compressor is de-energized. set current day and time, Heat: The thermostat controls the heating. program times and setpoints for heating and cooling, Off: Both the heating and cooling are off. tempo
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS To change a setting, use the increase ▲ or decrease Temperature Settings ▼ key. Refer to Table 2 for the default program. If the daytime To scroll the Installer Setup numbers backward, press energy savings period is not used, press the period key the Time ∇ key. (Leave or Return) until the time is blank. The fan setting To exit the Installer Setup, press Run Program. feature is available on select thermostat models. See
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS Table 3. Thermostat Installer Setup Options. (Continued) Installer Setup Other Choices Number (Press Factory Setting (Press ▲ or ▼ key to change) Time ∆ key to Actual Select change) Display Description Display Description Setting Adaptive 13 0 Adaptive Intelligent 1 Conventional recovery Intelligent Recovery (system starts recovery at Recovery control is activated programmed time). control. (system starts early so setpoint
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS Table 3. Thermostat Installer Setup Options. (Continued) Installer Setup Other Choices Number (Press Factory Setting (Press ▲ or ▼ key to change) Time ∆ key to Actual Select change) Display Description Display Description Setting Temperature 37 0 No difference in -3 thru 3 1Display adjusts to 1°F display displayed higher than actual room adjustment. temperature and temperature. actual room 2Display adjusts to 2°F temperature
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS Setting Current Day and Time INSTALLER SYSTEM-TEST 1. Press Set Current Day/Time. Use the Installer System Test to check the thermostat NOTE: On initial powerup or after an extended power operation. Refer to Table 4 for a list of the available loss, 1:00 pm flashes on the display until a key system-tests. is pressed. CAUTION Equipment Damage Hazard. Set Day/Time Minimum compressor off-time is bypassed PM Time Set Program d
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS Table 5. Installer System Test Options. Keys to Test Press Number Description Heating Equipment System-Test Time ∆ 10 Enter heating equipment System Test. ▲ 11 Stage-one heat comes on. The system fan is also energized. ▲ 12 Stage-two heat comes on. Stage-one heat and system fan remain on. ▼ 11 Stage-two heat turns off. ▼ 10 Stage-one heat and system fan turn off. Emergency Heating Equipment System Test Time ∆ 20 Change from heat
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS 4. Press the increase ▲ key again to display the soft- THERMOSTAT INFORMATION ware revision number (Example: 001 = Revision number 1). 1. Press the Time ∆ key to access the thermostat information. M14616 5. Press the increase ▲ key again to display the M14613 EEPROM identification code (Example: 314 = EEPROM ID 314). 2. Press the increase ▲ key to display the production date code. The first two large digits are the month and
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS TROUBLESHOOTING GUIDE Table 6. Troubleshooting Guide. Symptom Possible Cause Action Display will not Thermostat is not being Check for 24 Vac between R and C terminals. come on. powered. 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 positio
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS Table 6. Troubleshooting Guide. (Continued) Symptom Possible Cause Action System on indicator Heating or cooling equipment is Verify operation of heating or cooling equipment in self-test. (flame=heat, not operating. snowflake=cool) is displayed, but no warm or cool air is coming from the registers. Outdoor tempera- Option not activated. Enter Installer Setup number 24 and set to 1. Thermostat must a have OT terminals and a
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® T8611G CHRONOTHERM IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS Automation and Control Solutions Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z 69-14061 G.H. Rev. 12-02 www.honeywell.com/yourhome
