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INSTALLATION INSTRUCTIONS

69-1406-1

T8611G Chronotherm

®

 IV

Deluxe Programmable

Heat Pump Thermostats

APPLICATION

The T8611G Chronotherm® IV Deluxe Programmable 
Heat Pump Thermostats provides electronic control of 24 
Vac single-zone heat pump systems.

Refer to Table 1 for a general description of the 
thermostat. All T8611 thermostats require a common wire 
to supply power.

Table 1. Description of T8611 Thermostats.

MERCURY NOTICE

If this control is replacing a control that contains 
mercury in a sealed tube, do not place your old 
control in the trash. Dispose of properly.

Contact your local waste management authority 
for instructions regarding recycling and the 
proper disposal of the old control. 

INSTALLATION

When Installing this Product...

1.

Read these instructions carefully. Failure to follow 
the instructions can damage the product or cause 
a hazardous condition.

2.

Check the ratings given in the instructions and on 
the product to make sure the product is suitable for 
your application.

3.

Installer must be a trained, experienced service 
technician.

4.

After completing installation, use these instructions 
to check out the product operation.

Location

Install the thermostat about 5 ft (1.5m) above the floor in 
an area with good air circulation at average temperature. 
See Fig. 1.

Do not install the thermostat where it can be affected by:
— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall 

behind the thermostat.

Wallplate Installation

The thermostat can be mounted horizontally on the wall 
or on a 2 in. x 4 in. (50.8 mm x 101.6 mm) wiring box. 
Position wallplate horizontally on the wall or on a 
2 in. x 4 in. (50.8 mm x 101.6 mm) wiring box.

1.

Position and level the wallplate (for appearance 
only). The thermostat will function correctly even 
when not level. 

2.

Use a pencil to mark the mounting holes. See Fig. 
2.

3.

Remove the wallplate from the wall and drill two 
3/16 inch (76 mm) holes in the wall (if drywall) as 
marked. For firmer material such as plaster, drill 
two 7/32 inch (5.56 mm) holes. Gently tap anchors 
(provided) into the drilled holes until flush with the 
wall.

4.

Position the wallplate over the holes, pulling wires 
through the wiring opening.

5.

Loosely insert the mounting screws into the holes.

6.

Tighten mounting screws.

T8611 Changeover

System Selection

Fan Selection

Comments

G

Automatic

Em Heat-Heat-Off-Cool-Auto On-Auto

System and fan selections are done by keyboard.

Summary of Contents for Chronotherm IV T8611G

Page 1: ...out the product operation Location Install the thermostat about 5 ft 1 5m above the floor in an area with good air circulation at average temperature See Fig 1 Do not install the thermostat where it can be affected by drafts or dead spots behind doors and in corners hot or cold air from ducts radiant heat from sun or appliances concealed pipes and chimneys unheated uncooled areas such as an outsid...

Page 2: ...kup of T8611G in a heat pump system Fig 4 Correct wiring technique Mounting Thermostat 1 Engage tabs at the top of the thermostat and wall plate See Fig 5 2 Press lower edge of case to close and latch NOTE To remove the thermostat from the wall first pull out at the bottom of the thermostat remove top last Fig 5 Mounting thermostat on wallplate 5 FEET 1 5 METERS YES NO NO NO M10106 WIRES THROUGH W...

Page 3: ...stem fan On Fan operates continuously Auto Fan operates with equipment LED Indication Two LED indicators are located in the upper right of the thermostat They indicate when a Check or Fail signal is sent to the thermostat from the system See Fig 8 Fig 6 T8611G key locations and descriptions Fig 7 Thermostat System and Fan key locations Fig 8 LEDs location M14624 Time Set Program System Fan Run Pro...

Page 4: ...e Installer Setup numbers backward press the Time key To exit the Installer Setup press Run Program Fig 9 Display of all LCD segments Fig 10 Display of Installer Setup number and setting IMPORTANT Only configurable numbers are shown on the device Example If thermostat does not have a system key Installer Setup Number 12 will not be displayed Review Table 3 factory settings and mark any desired cha...

Page 5: ...al energized for reversing valve in heating Deadband 30 3 Heating and cooling setpoints can be set no closer than 3 F 1 5 C 4 thru 10 Heating and cooling setpoints can be set no closer than the chosen value 4 4 F 2 C 5 5 F 2 5 C 6 6 F 3 C 7 7 F 3 5 C 8 8 F 4 C 9 9 F 4 5 C 10 10 F 5 C Not Used 31 and 32 Minimum off time for the compressor 33 5 5 minute minimum off time for the compressor 0 thru 4 M...

Page 6: ... adjusts to 3 F higher than actual room temperature 1 Display adjusts to 1 F lower than actual room temperature 2 Display adjusts to 2 F lower than actual room temperature 3 Display adjusts to 3 F lower than actual room temperature Furnace Air Filter Timer 43 0 Off 1 2 3 4 1 10 days 2 30 days 3 60 days 4 120 days Times counted when heat cool or fan is running Humidifier Pad Monitor 44 0 Off 1 2 3 ...

Page 7: ...test and Time to go back to the previous test Press Run Program to exit the system test M14619 Time Set Program System Fan Run Program Hold Temp Set Current Day Time Set Current Day Time Wake Leave Return Sleep Day Heat Cool Settings Daylight Time Copy Set Day Time Mon PM M14620 Time Set Program System Fan Run Program Hold Temp Set Current Day Time Wake Leave Return Sleep Day Day Heat Cool Setting...

Page 8: ...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 heating to emergency heating equipment System Test 21 Emergency heat come on 20 Emergency heat turn off Cooling Equipment System Test Time 30 Change from heating or emergency heatin...

Page 9: ...soft ware identification code Example 02 software ID code 2 4 Press the increase key again to display the soft ware revision number Example 001 Revision number 1 5 Press the increase key again to display the EEPROM identification code Example 314 EEPROM ID 314 6 Press the Run Program key to exit the system test The system test times out after four minutes without any key presses CHECKOUT Outdoor T...

Page 10: ...ot come on No power to the thermostat Check for 24 Vac between R and C terminals If missing 24 Vac check if the circuit breaker is tripped reset the circuit breaker check if the system fuse is blown replace the fuse check if the power switch on the HVAC equipment is in the Off position set to the On position check wiring between thermostat and HVAC equipment replace any broken wires and tighten an...

Page 11: ...self test Outdoor tempera ture not displayeda Option not activated Enter Installer Setup number 24 and set to 1 Thermostat must have OT terminals and a C7089B1000 installed Outdoor temperature display is incorrecta Outdoor sensor is connected incorrectly Refer to C7089B1000 Installation Instructions and check wiring between the thermostat and sensor Wrong sensor Replace sensor with C7089B1000 Sens...

Page 12: ...yourhome 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 ...

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