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Selector Switches
In order for this thermostat to control your system, the system type must be specified
by the selector switches on the printed circuit board inside the thermostat. There is
also a selector switch for your choice of Fahrenheit or Celsius temperature display.
■ Heating System Selector (HG - HE switch)
The factory position for this switch is in the “HG” position. Leave it in this position if
you have a gas furnace or an oil burner. If you have an electric furnace, test to see
whether the Heat and Fan come on as expected after installation. If the Fan
operation is normal, leave it in the “HG” position. If the Fan does not come on
within a minute of the thermostat calling for heat, change the switch position to
“HE”. The system selector has no effect in the cooling mode.
NOTE: “HG” position is for gas and most other systems. “HE” position is for
certain electric systems having a fan relay.
■ System Selector (STANDARD - HEAT PUMP switch)
The factory position for this switch is in the STD position. Leave it in this position if
you have ANY system that uses gas, oil, electric, or hot water heating. If you have
a single-stage Heat Pump (no auxiliary or emergency heat source), then slide the
switch to the HP position. Be sure the reversing valve wire is connected to the
correct terminal for your heat pump (Y/O) or (W/B).
■ F° / C° selector (Fahrenheit / Celsius)
Your thermostat is set for F° mode from the factory. In order to change to C° mode, slide
the switch to C° and press the reset button on front of the thermostat with a paper clip.
NOTE: Unless the reset button is pressed, the thermostat will not change
temperature mode.
OPERATION
Setting Day and Time
■ The LCD will show this information when
batteries are first installed, or after the
Reset button is pressed. The temperature
will update after a few seconds.
■ During time and day setting mode, the
temperature and program displays will go
blank.
■ Example: Set the Thermostat to the
current time of 2:16 pm on Saturday.
Refer to the Steps below.
STEP 1:
■ Press to enter time and day setting
mode. The current hour and the AM / PM
indicator will be flashing.
■ Press to change the Hour up or down to
the current hour.
Note the AM / PM indicator, as the
display will change at 12 AM and 12 PM.
STEP 2:
■ Press again to change from hour setting
to minute setting. The current minute will
be flashing.
■ Press to change the Minute up or down
to the current minute.
STEP 3:
■ Press again to change from minute
setting to day setting.
The current day will be flashing.
■ Press to change the Day up or down to
the current day.
STEP 4:
■ Press again to change back to the
normal display.
NOTE: You may press the at any time during Day and Time setting to
return to the normal display.
12 Hr. / 24 Hr. Time Format
Your thermostat is set from the factory in normal 12 (AM / PM) time format. To change
to 24 hour (military) time, press at any time while the Hour, Minute,
or Day is flashing to toggle between the 12 hour and 24 hour formats. The AM / PM
indicator will not be displayed in 24 hour mode. Both the current time and all
programs will automatically change to the selected format.
PROGRAMMING
The following time and temperature settings are pre-programmed into the thermostat:
Temperature in F° (C°)
Program Number Time Heat Cool
1 6:00 am 68°F (20°C) 78°F (26°C)
2 8:00 am 60°F (16°C) 85°F (29°C)
3 4:00 pm 68°F (20°C) 78°F (26°C)
4 10:00 pm 60°F (16°C) 82°F (28°C)
■ All 7 days of the week have the same default programs.
Personal Program Schedule
■ You can revise the factory programs to match your own schedule. Use this
Personal Program Schedule to determine which times and temperature settings
match your comfort and energy saving requirements. Use a pencil so you can
revise your records each time you change your program settings.
Heating
Day Program 1 Program 2 Program 3 Program 4
Monday – Time Time Time Time
Friday
Temp Temp Temp Temp
Saturday – Time Time Time Time
Sunday
Temp Temp Temp Temp
Cooling
Day Program 1 Program 2 Program 3 Program 4
Monday – Time Time Time Time
Friday
Temp Temp Temp Temp
Saturday – Time Time Time Time
Sunday
Temp Temp Temp Temp
Revising Programs
■ Familiarize yourself with manually changing programs, so that you can easily
modify the programs as your comfort needs change. Follow the steps below to
change the program times and temperatures.
NOTE: 1) The program time can be set in 10-minute increments.
2) The program temperature can be set in increments of 1°F (1°C).
3) After 15 seconds without a key press, the thermostat will return to normal
display mode.
4) When setting the program time, note the AM / PM indicator.
STEP 1:
■ Slide the System Switch to the HEAT or
COOL position to program the
corresponding system.
NOTE: If the System Switch is in the OFF
position, the last position used will be
programmed.
STEP 2:
■ Press to enter program mode. HEAT or
COOL will be displayed on the LCD.
STEP 3:
■ The Program hour and AM or PM
indicator are flashing. Press to change
the hour.
STEP 4:
■ Press again to change to the minute
position. The current minute will be flashing.
■ Press to change the minute.
STEP 5:
■ Press again to change to the program
temperature. The current temperature
will be flashing.
■ Press to change the temperature.
STEP 6:
■ Press again to move to the next program
number.
■ Repeat Steps 3 through 5 to change the
remaining Weekday and Weekend
programs. (There are a total of 8 programs.)
■ After cycling through all 8 programs, press
again to return the display to normal.
■ Press at any time to exit the Program Mode.
Reviewing Programs
To review your program settings, press repeatedly to cycle through the
programs. You can also make changes at any time.
System Selector Switch
The System Selector switch on the front of the thermostat determines
the operating mode of the thermostat. You may select COOL, OFF, HEAT.
NOTE: Anytime you install or remove the thermostat from
the wallplate, slide the System Selector to the OFF position
to prevent the possibility of a rapid system On-Off.
Fan Switch
The Fan switch should normally be located in the AUTO position. The Fan will be turned
on along with normal operation of your system. In a normal gas or oil furnace, the Fan will
be turned on by your furnace after its warm-up delay. For electric heat, air conditioning,
and heat pump operation, the Fan will turn on with the system.
To run the Fan on continuously, slide the Fan switch to the
ON position.
Temporary Manual Override
To temporarily change the current set temperature without affecting your program:
■ Press and hold for about 1 second
to enter Manual Override mode. When
display flashes, you can release the key.
■ Press again to change to your desired
Set Temperature. Hold the key for 2
seconds to fast-advance the Set
Temperature.
■
Press to return to normal mode, or wait
15 seconds for it to return automatically.
■
The current program number will flash to
signify the Temporary Override.
■
At the next program change time, the
Temporary Override is cancelled, and the
next program temperature becomes the
setpoint temperature.
To end the Temporary Manual Override:
■ Press, then press again. This will return
the set temperature to the current
program set temperature.
Permanent Override
To hold your Manual Override for vacation or just an extended period of time:
■ Press to make the current program
temperature the HOLD temperature.
HOLD will be displayed on the LCD, and
the Program number will disappear.
■ Follow the Temporary Manual Override
instructions above to change the
Permanent Manual Override temperature.
■ You can confirm the held set temperature
by pressing for less than 1 second.
To end the Permanent Manual Override:
■ Press again. The thermostat will return to
the current program, and the HOLD
display will be canceled.
SPAN Setting Mode
Your thermostat is set at the factory to cycle at 1°F (0.5°C) above and below the set
temperature. (Span = 2) This setting has been designed to provide a comfortable
room temperature under most all conditions. However, if you find your system cycling
too fast or too slow, then the Span can be adjusted to modify the cycle time.
■ Press and hold BOTH for three seconds.
The display will flash, and SPAN will be
displayed on the LCD.
■ Press to raise the Span to 3. This setting
INCREASES the cycle time by allowing
your system to run LONGER.
■ Press to lower the Span to 1. This setting
DECREASES the cycle time by causing
your system to run SHORTER.
The Span settings remain the same for both HEAT and COOL.
The Span can be changed at any time, and is independent of program times or
temperatures.
When batteries are installed in the thermostat, or the Reset key is pressed, the Span
is reset back to setting 2.
Backlighting (INDIGLO
®
Night-Light)
Your thermostat has an electroluminescent lamp that backlights the display for easy
viewing in the dark.
When any key is pressed or the System Switch is changed, the display is illuminated.
The display will remain illuminated for 5 seconds after the last key is pressed. This
allows the light to stay on if you need to operate several keys.
Note: If the thermostat is in Low Battery warning condition, the backlight will not
operate. Replace with 2 new AA alkaline batteries to restore the Backlight function.
Low Battery Warning
Your thermostat has a two-stage low battery warning
system. When the batteries are first detected to be weak,
the first stage low battery warning is indicated by battery
symbol flashing on the LCD display. At your earliest
convenience, you need to replace the batteries with 2 new
AA alkaline batteries.
When the batteries become too weak for normal
operation, the thermostat enters the second stage low
battery warning which shuts down the thermostat. In this
condition, “BATT” flashes alone on the display, and the
thermostat will turn your system Off. Your system will
remain shut-off until the batteries are replaced.
Note: The thermostat will still keep the current time and your programs in
memory until new batteries are installed. After confirming that new batteries have
been inserted, the thermostat will return to normal operation.
Error Mode
If the thermostat is unable to control your system due to
an unexpected battery problem, the thermostat will enter
Error Mode. In this condition, the thermostat flashes
“Err” on the LCD display, and shuts off your system.
To correct this problem, replace the batteries with 2 new
AA alkaline batteries, even if you have recently replaced
them. Next, use a paper clip to press the RESET button next to the keypad. You will
need to reprogram your thermostat and confirm normal operation.
If Error Mode returns, please call CTC Technical support at 1-800-676-7861 for
further information.
Auto Cut Off
Your thermostat will automatically cut-off in Heat mode if the room temperature rises above
95°F (35°C). It will cut-off in Cool mode if the room temperature drops below 45°F (7°C).
Note that if your system has malfunctioned and no longer responds to thermostat
controls, the Auto Cut-Off will have no effect.
Mechanical Heat Back-up
This thermostat includes a bi-metal switch that will automatically turn on the Heat
when the temperature reaches about 41° F (5° C).
WARNING: This switch only activates the Heating terminal (W). The system
itself must be capable of automatically turning the Fan On. Without normal
Fan operation, severe damage to the heating system could result.
TROUBLESHOOTING
Problem Solution
No Display
Entire Display Dims
Program Does Not Change at your
Desired Setting
Auto Fan Does Not Turn On Properly
Heating or Cooling Does Not Go
On or Off
Erratic Display
If unit continues to operate in the Off
position
Thermostat permanently reads “HI”,
“LO”, or “ERR”
If you experience any other problems, call 1-800-676-7861 from 8 AM to 5 PM
Central Time for technical assistance.
M
PM
M
PM
SA
PM
2
TEMP
M
F
TH
WT
AM
1
HEAT
M
F
TH
WT
AM
1
HEAT
PROGRAM
PROGRAM
PROGRAM
1. Check battery connections and
batteries.
2. Press RESET button with a small pin
and hold in for two seconds.
1. Replace Batteries
1. Check that the time is set properly to
“AM” or “PM”.
2. Check that the thermostat is not in
Permanent HOLD mode.
3. Check for the correct day setting.
1. Move HG/HE selector to correct position
1. Check that the function switch is in the
correct position (“HEAT” or “COOL”).
2. There may be as much as 4-minute
delay before the system turns On - wait
and check. (Compressor protection
delay.)
3. Check your circuit breakers and
switches to ensure there is power to the
system.
4. Replace batteries.
5. Make sure your furnace blower door is
closed properly.
6. If your non-heat pump system only uses
4-wires, be sure the jumper wire is
installed between the RC and RH
terminals.
7. Check the position of the Reversing
Valve selector switch: Standard or Heat
Pump.
1. Press the reset button once with a small
pin and hold for two seconds. Then
reprogram.
1. Replace unit.
1. Replace unit.
DAY/TIME
DAY/TIME
DAY/TIME
HOLD/RET
PROGRAM
SA
PM
2
TEMP
M
F
TH
WT
AM
1
HEAT
SET TEMP
3
COOL TEMP
PM
COOL TEMP
3
SA
TH
PM
HOLD
TEMP
T
PM
3
HEAT TEMP
PROGRAM
© 1999, Climate Technology Corp.
Form No. 41438, 10/99
Climate Technology Corp.
2500 FRISCO AVENUE
MEMPHIS, TN 38114
A Hunter Fan Company
®
PROGRAM
PROGRAM
COOLOFFHEAT
AUTOONFAN
Figure 7
C
F
HG – HE
NORM – HP
Temperature
Display
(SW4)
Fan Option
(SW3)
M
AM
M
AM
4
TEMP
DAY/TIME
System
Selector
(SW6)
!
or
HOLD/RET
HOLD/RET
HOLD/RET
HOLD/RET
or
or
HOLD/RET
HOLD/RET