Honeywell Chronotherm 4 Manual

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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Table 8. Installer System Test Options.
NOTE: Press any key and the numbers will change on the
display. Press Time ▼ 
▼ to go to the previous test and
Time ▲
▲ to go to the next test. The Run Program Key
will not exit from this test. To exit, go to a different
test and press Run Program.
THERMOSTAT INFORMATION
1.Press the Time ▲ 
▲ Key to access the thermostat
information.2.Press the increase ▲ key to display the production...

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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4.Press the increase ▲ key again to display the software
revision number (Example: 001=Revision number 1).PROGRAMMING
The keyboard is located behind the thermostat cover with
three frequently used keys by the display. The thermostat
display shows day, time, program period, temperature, system
and fan operation selection.
The thermostat can be set for four times and up to
eight temperatures for each day of the week (28...

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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Table 9. Default Time, Setpoints and Fan Settings (continued).
Setting the Current Day and Time
IMPORTANT
Always press the keys with your fingertip or similar
blunt tool. Sharp instruments like pens and pencil
points can damage the keyboard.
1.Press Set Current Day/Time.
NOTE: On initial power up or after an extended power
loss, 1:00 pm flashes on the display until a key
is pressed.3.Press Time ▲
▲ or Time ▼
▼ until the current...

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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Programming the First Day
Start by programming the Wake time and temperature (and
fan operation on select models) for any one day:
1.Press Wake.6.Press increase 
 ▲ 
 or decrease 
 ▼ 
 key until the desired
temperature setpoint is displayed.
M10317
Time Set ProgramSystem Fan Run
Program
Hold TempSet Current
Day/TimeWakeWakeLeave
Return Sleep
DayHeat/Cool
Settings
Daylight
TimeCopyHeat
Auto System Fan WakeAM
TueSet ProgramStart...

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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5.Press Copy.
NOTE: donE will be displayed for two seconds and
then the normal program display will be
shown.Setting Temporary Temperatures
Changing Temperature Setting Until the Next
Program Period
Press increase 
 ▲ 
 or decrease 
 ▼ 
 key until the desired
temperature setpoint is displayed.
NOTE: If ▼ or ▲ appear under the temperature display, it
means that both the heating and cooling setpoints
are being adjusted. Tapping...

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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Changing Temperature Setting Until
a Designated Day and Period
1.Press Hold Temp twice.NOTE: In this example, the thermostat uses the Hold
setting for eighteen days and returns to the
daily programs at the Return period start time.
The temperature settings are heating 54°F
and cooling 84°F. Only the heating
temperature is used because the System is
set for Heat. The thermostat will use both the
heating and cooling temperature...

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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OPERATION
P+I Control
The thermostat microprocessor based control requires that
the user understands temperature control and thermostat
performance. A conventional electromechanical or electronic
thermostat does not control temperature precisely at setpoint.
Typically, there is an offset (droop) in the control point as the
system load changes. This is a phenomenon that most people
in the industry know and accept. Many factors...

T8611G CHRONOTHERM® IV DELUXE PROGRAMMABLE HEAT PUMP THERMOSTAT
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Thermostat Operation
Startup
When power to the thermostat is turned on, a startup and
initialization program begins. The startup occurs only on initial
powerup. After total loss of power for an extended period, the
current time and day may need to be set, but the user
program is held. See Table 11 for the default values.
NOTE: Immediately following initialization, the user can
enter new setpoints to be used in place of the...

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TROUBLESHOOTING GUIDE
Refer to Table 12 for troubleshooting information.
Table 12. Troubleshooting Information.
Symptom Possible Cause Action
Display will not come
on.Thermostat is not being powered. • 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...

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Table 12. Troubleshooting Information (continued).
CROSS REFERENCE
All SUPER TRADELINE® Chronotherm® IV thermostats are different from the existing Chronotherm® III devices as
summarized in Table 13.
Table 13. Difference Between Chronotherm® III Thermostats And Chronotherm® IV Thermostats.
Feature/Function Chronotherm® III Family Chronotherm ® IV Family
Programming 5-1-1 day programming 7-day programming
Changeover Automatic or...