PROGRAMMABLE
THERMOSTAT
M
AM
4
TEMP
Owners Manual
Model 43154
3
Wire Labeling (Continued)
■ After labeling wires, disconnect them from the existing thermostat terminals.
■ Remove existing wallplate. To make sure wires do not fall back into wall opening, you may
want to tape them to the wall.
■ If hole in wall is larger than necessary for wires, seal this hole with insulating material so that
no hot or cold air can enter the back of the thermostat from the wall. This air could cause a
false thermostat reading.
RH
x
RC
x
G
x
x
Y/O
Table A
NOTE: Do not connect a “Common” wire (sometimes labeled “C”) to any terminal on
this thermostat. Tape up the wire and do not use. This wire provides electricity to non-
battery powered thermostats.
Mount Wallplate and Thermostat
■ Remove the wallplate from your thermostat by pressing the release tab on the bottom of the
thermostat. See Figure 2.
4
4-wire Heat/Cool System
System
Selector
Wallplate
Terminals
Jumper
–
STD HP
Rh
Y/O
W/B
G
Rc
Y1
X
X
Heat/Cool
24V Supply
Heat Relay
or Valve
Cool
Fan
Relay
Contactor
System
Selector
Wallplate
Terminals
No Jumper
–
STD HP
Rh
Y/O
W/B
G
Rc
Y1
X
Fan
Relay
Heat Relay
or Valve
Cool 24V
Supply
Heat 24V
Supply
Cool
Contactor
System
Selector
Jumper
Cool
Mode
OR
Heat
Mode
X
Connect to Proper Reversing
Valve Terminal. See Table A
(Continued)
5
Setting Day and Time (Continued)
Cooling
Day
Program 1
Time
Temp
Program 2
Time
Program 3
Time
Program 4
Time
STEP 2:
Monday –
Friday
■ Press again to change from hour setting to
minute setting. The current minute will be
flashing.
M
day/time
Temp
Temp
Temp
PM
Saturday – Time
Sunday Temp
Time
Time
Time
■ Press to change the Minute up or down to
the current minute.
Temp
Temp
Temp
STEP 3:
Revising Programs
■ Press again to change from minute setting
to day setting. The current day will be flash-
ing.
M
■ 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.
day/time
PM
NOTE: 1) The program time can be set in 10-minute increments.
■ Press to change the Day up or down to the
2) The program temperature can be set in increments of 1˚F (1˚C).
current day.
3) After 15 seconds without a key press, the thermostat will return
to normal display mode.
STEP 4:
4) When setting the program time, note the AM / PM indicator.
SA
■ Press again to change back to the
normal display.
day/time
STEP 1:
PM
2
or
system
■ Slide the System Switch to the HEAT or
COOL position to program the correspond-
ing system.
SA
heat
hold
off
TEMP
cool
/return
PM
2
hold
NOTE: If the System Switch is in the OFF
position, the last position used will be
programmed.
NOTE: You may press
the normal display.
at any time during Day and Time setting to return to
TEMP
/return
STEP 2:
12 Hr. / 24 Hr. Time Format
■ Press to enter program mode. HEAT or COOL
will be displayed on the LCD.
Your thermostat is set from the factory in normal 12 (AM / PM) time format. To change to 24
M T W TH F
AM
program
program
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.
1
STEP 3:
HEAT
■ The Program hour and AM or PM indicator
are flashing. Press to change the hour.
PROGRAMMING
The following time and temperature settings are pre-programmed into the thermostat:
STEP 4:
Temperature in C˚ (F˚)
■ Press again to change to the minute posi-
tion. The current minute will be flashing.
M T W TH F
AM
program
Program Number
Time
6:00 am
8:00 am
4:00 pm
10:00 pm
Heat
Cool
■ Press to change the minute.
1
1
2
3
4
68˚F (20˚C)
60˚F (16˚C)
68˚F (20˚C)
60˚F (16˚C)
78˚F (26˚C)
85˚F (29˚C)
78˚F (26˚C)
82˚F (28˚C)
HEAT
STEP 5:
■ Press again to change to the program tem-
perature. The current temperature will be
flashing.
M T W TH F
AM
program
■ All 7 days of the week have the same default programs.
■ Press to change the temperature.
1
HEAT
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.
STEP 6:
■ Press again to move to the next program number.
program
■ Repeat Steps 3 through 5 to change the remaining Weekday and
Weekend programs. (There are a total of 8 programs.)
Heating
Day
Program 1
Time
Temp
Program 2
Time
Program 3
Time
Program 4
Time
Monday –
Friday
■ After cycling through all 8 programs, press again to return the
display to normal.
program
Temp
Temp
Temp
Saturday – Time
Sunday Temp
Time
Time
Time
■ Press at any time to exit the Program Mode.
hold
Temp
Temp
Temp
/return
6
Reviewing Programs
Filter Change Indicator
Your thermostat measures the number of hours your heating and cooling system has been in
use. To maximize your system’s performance and energy efficiency, change or clean your filter
regularly.
program
To review your program settings, press
repeatedly to cycle through the programs.
You can also make changes at any time.
■ When the total system runtime for heat and
M T W TH F SA SU SET TEMP
cool reaches 400 hours, the Filter Change
Indicator will flash as a reminder to check
your system’s filter.
System Selector Switch
AM
PM
The System Selector switch on the front of the thermostat
determines the operating mode of the thermostat. You may
select COOL, OFF, HEAT.
system
heat
FILTER
2
■ After changing or cleaning the system’s
COOL TEMP
off
filter
filter, press and hold the Filter Key for 3
seconds. The display will blink, and the timer
will be reset to zero.
cool
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 sys-
tem On-Off.
Note: Pressing the Filter Key at any time for less than 3 seconds will cause the Filter
indicator to appear on the LCD. This is only to confirm key operation, and the timer is
not affected unless the key is held for greater than 3 seconds.
Fan Switch
The Fan switch should normally be located in the AUTO posi-
tion. 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.
fan
SPAN Setting Mode
auto
on
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.
To run the Fan on continuously, slide the Fan switch to the ON position.
■ Press and hold BOTH for three seconds. The
display will flash, and SPAN will be dis-
played on the LCD.
Temporary Manual Override
To temporarily change the current set temperature without affecting your program:
■ Press to raise the Span to 3. This setting
INCREASES the cycle time by allowing your
system to run LONGER.
■ Press and hold for about 1 second
to enter Manual Override mode. When
SET TEMP
or
display flashes, you can release the key.
■ Press to lower the Span to 1. This setting
DECREASES the cycle time by causing your
system to run SHORTER.
3
■ Press again to change to your desired Set
Temperature. Hold the key for 2 seconds to
fast-advance the Set Temperature.
COOL TEMP
or
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.
■ Press to return to normal mode, or wait 5
seconds for it to return automatically.
When batteries are installed in the thermostat, or the Reset key is pressed, the Span is reset back
to setting 2.
hold
/return
■ The current program number will flash to
signify the Temporary Override.
SA
®
Backlighting (INDIGLO Night-Light)
Your thermostat has an electroluminescent lamp that backlights the display for easy viewing in
the dark.
PM
■ At the next program change time, the Tem-
porary Override is cancelled, and the next
program temperature becomes the setpoint
temperature.
3
When any key is pressed or the System Switch is changed, the display is illuminated.
COOL TEMP
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.
To end the Temporary Manual Override:
Note: If the thermostat is in Low Battery warning condition, the backlight will not
operate. Replace with 2 new alkaline batteries to restore the Backlight function.
■ Press, then press again. This will return the set temperature to the current
hold
program set temperature.
/return
Low Battery Warning
Your thermostat has a two-stage low battery warning
system. When the batteries are first detected to be weak,
T
Permanent Override
To hold your Manual Override for vacation or just an extended period of time:
the first stage low battery warning is indicated by battery
symbol flashing on the LCD display. At your earliest conve-
nience, you need to replace the batteries with 2 new AA
alkaline batteries.
PM
■ Press to make the current program tem-
3
TH
hold
perature the HOLD temperature. HOLD
will be displayed on the LCD, and the
Program number
HEAT
TEMP
/return
PM
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.
HOLD
will disappear.
TEMP
■ 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.
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.
To end the Permanent Manual Override:
■ Press again. The thermostat will return to the current program, and the HOLD
display will be canceled.
hold
/return
7
Auto Recovery
TROUBLESHOOTING
Climate Technology’s Auto Recovery feature meets the ENERGY STAR® guidelines for energy
efficiency by allowing the heating or cooling system to recover gradually from an energy-
saving setpoint temperature to a comfort setpoint temperature.
Problem
Solution
No Display
1. Check battery connections and batteries.
Auto Recovery calculates how early to turn your system back On, so that the room tempera-
ture is already comfortable by the start of the comfort temperature program period. Auto
Recovery works in both Heat and Cool modes.
2. Press RESET button with a small pin and hold in
for two seconds.
■ When the thermostat is in Auto Recovery mode, the dis-
play will alternate “RECO” with time, and the program
indicator will flash.
Entire Display Dims
1. Replace Batteries
■ Auto Recovery can be disabled by sliding the Recovery
switch on the circuit board to disable.
Program Does Not Change
at your Desired Setting
1. Check that the time is set properly to “AM” or “PM”.
2
HEAT TEMP
2. Check that the thermostat is not in Permanent
HOLD mode.
■ Auto Recovery will not operate if Permanent hold or
Temporary hold is in operation.
3. Check for the correct day setting.
■ Auto Recovery can be canceled manually if
HOLD / RETURN is pressed during the recovery
process.
Auto Fan Does Not
Turn On Properly
1. Move HG/HE selector to correct position.
■ Auto Recovery will be canceled and change to Temporary
Manual Override mode if the setpoint is adjusted during
the recovery process.
Heating or Cooling Does
Not Go On or Off
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.)
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 prob-
lem, 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.
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.
If Error Mode returns, please call Climate Technology Technical support at 1-800-676-7861 for
further information.
7. Check the position of the System Selector switch:
Standard or Heat Pump.
Auto Cut Off
Erratic Display
1. Press the reset button once with a small pin and hold
for two seconds. Then reprogram.
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 40˚F (4˚C).
Note that if your system has malfunctioned and no longer responds to thermostat controls,
the Auto Cut-Off will have no effect.
If unit continues to operate
in the Off position
1. Replace unit.
1. Replace unit.
Mechanical Heat Back-Up
Thermostat permanently
reads “HI”, “LO”, or “ERR”
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 sys-
tem itself must be capable of automatically turning the Fan On. Without
normal Fan operation, severe damage to the heating system could result.
If you experience any other problems, call 1-800-676-7861 from 8 AM to 5 PM Central Time for
technical assistance.
Climate Technology Corp.
2500 FRISCO AVENUE
MEMPHIS, TN 38114
© 2003 Climate Technolgoy Corp.
41639-01 07/02/2003
A Hunter Fan company
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