Lennox 43558 Thermostat User Manual

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Programmable Heat Pump or  
Multi-Stage Auto Season Thermostat  
Owner’s Manual  
Model 43558  
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Introduction  
2
CONGRATULATIONS!  
Your new Climate Technology electronic thermostat will provide  
years of reliable service. By saving energy, your thermostat will  
pay for itself during its first season of use. Thank you for buying  
a Climate Technology product!  
Please read this manual for complete instructions on installing  
and operating your thermostat.  
If you require further assistance, call Climate Technology Techni-  
cal Support at 800-676-7861 from 8 AM to 5 PM Central Time.  
Model Information:  
43558  
Model Number ___________________________________________  
Serial Number____________________________________________  
Date Purchased __________________________________________  
Where Purchased _________________________________________  
3
Table of Contents  
3
Read This Before Installing Thermostat  
Features  
6-7  
8-9  
INTRODUCTION  
INSTALLATION  
What You Need  
10  
10-11  
12  
Selector Switches  
Remove Old Thermostat  
Wire Labeling  
13-15  
16  
Mount Wallplate and Thermostat  
Connect Wires and Mount Thermostat Cover to Wallplate  
17  
PROGRAMMING  
Option Menu  
18-21  
22-23  
24  
Setting Time and Day  
Programming Introduction  
Personal Program Schedule  
Programming  
25  
26  
Weekday/Weekend Programming  
7-Day Programming  
27-28  
29-30  
31-32  
Everyday Programming  
(continued)  
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Table of Contents (continued)  
4
Program Options  
33  
33  
PROGRAMMING (continued)  
Programmable Fan  
2 or 4 Programs Per Day  
33  
Reviewing Programs  
34-35  
Power Switch  
36  
36  
OPERATIONS  
System Selection Key  
Fan Key  
37  
System Indicator Light  
Emergency Heat  
37-38  
38  
Reviewing the Current Temperature Setting  
Temporary Manual Override  
Permanent Manual Override  
Vacation (Programmable) Hold  
Auto Season Changeover  
Home Today  
39  
40  
41  
42  
43  
44-45  
46  
Energy Monitor  
Filter Monitor  
47  
5
SPAN Settings  
48  
49-50  
50  
OPERATIONS (continued)  
SAFETY FEATURES  
Auto Recovery  
Keyboard Lock  
Backlighting (INDIGLO® Night-Light)  
51  
Remote Sensors  
51-52  
AC Power Monitor  
Low Battery Warning  
Error Mode  
54  
54  
55  
TROUBLESHOOTING  
WIRING DIAGRAMS  
Problems & Solutions  
Technical Support  
56-57  
57  
Heat Pump Systems  
Mulit-Stage Systems  
58  
59  
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Read This Before Installing Thermostat  
6
IMPORTANT  
COMPRESSOR PROTECTION  
Read the entire installation section of this Owner’s Manual  
thoroughly before you begin to install or operate your Cli-  
mate Technology Thermostat.  
The thermostat provides a 3.5 minute delay after shutting off  
the heating or cooling system before it can be restarted.  
1
5
This feature will prevent damage to your compressor caused  
by rapid cycling.  
INSTALLATION  
All installation is normally performed at your  
thermostat.  
TEMPERATURE RANGE  
2
Your thermostat can be programmed between 45°F and 95°F  
(7°C and 35°C). However, it will display room temperatures  
from 15°F to 99°F (-9°C and 37°C). “HI” will be displayed if  
the temperature is higher than 99°F (37°C), and “LO” will be  
displayed if the temperature is lower than 15°F (-9°C).  
6
ARMCHAIR PROGRAMMING  
You can program your thermostat before installation by in-  
serting the batteries and following the instructions starting  
on page 18. This can be done while you relax in your favorite  
chair and is a very good way to familiarize yourself with all the  
functions of your Climate Technology Thermostat.  
3
AUTO RECOVERY  
Your thermostat is set from the factory to gradually recover  
7
the room temperature from an energy saving program to  
SYSTEM COMPATIBILITY  
your comfort program. Therefore, the thermostat may turn your  
system on several minutes prior to your programmed time. This  
operation is normal, but can be turned off. Refer to the Options  
Menu information on pages 18-21.  
Your Thermostat is designed to operate these  
4
24-Volt systems:  
Multi-stage heat pumps with auxiliary heat  
Multi-stage systems (2 stage heat, 2 stage cool)  
This thermostat will not control 120/240 Volt systems or  
millivolt systems.  
7
OPERATION  
BATTERY WARNING  
This system operates on your system’s 24 Volt power supply.  
The supply is monitored by the thermostat, and it will stop  
Batteries may be used optionally to prevent the loss of your  
thermostat’s clock, programs and options due to a power  
outage. However, when the batteries become drained, a low  
battery warning will appear on the display. When this message  
occurs, install 2 new AAA batteries. You have approximately 30  
seconds when changing the batteries to keep thermostat’s  
clock and program settings.  
8
9
functioning if AC power is lost. (When using backup batteries,  
“No AC Pwr” will be displayed.) All system controls will remain  
off until power is restored.  
NOTE: The INDIGLO® Night-Light will not function when  
AC power is lost.  
NOTE: The default system selection at power-on is HEAT.  
Batteries are recommended to prevent an undesired sys-  
tem change due to a power outage.  
NOTE: Any remote temperature sensors (if used on your  
system) will not operate when AC power is lost.  
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Features  
8
INDIGLO® Night-Light  
activated by pressing any key.  
Alpha-numeric display shows time, day, temperature,  
program number, and other feature information as required.  
Home Today: Overrides energy-saving program  
temperatures while you are at home for the day.  
Energy Monitor:  
Temperature Keys:  
Keys for raising or  
lowering temperature  
settings.  
Measures and displays  
heating and cooling  
system operating time for  
Today, Yesterday, This  
Month, Last Month, or  
Total. By monitoring your  
energy usage, you can  
program the thermostat  
to optimize energy  
savings.  
Power Switch:  
Select ON, Positive  
OFF, or Emergency  
Heat.  
Soft-touch  
Reset: Press with a  
paper clip to reset the  
thermostat and return  
to power-up settings.  
programming  
keypad, see details  
below.  
9
System Indicator LEDs: Show status  
of Stage 1, Emergency, Stage 2, and  
Check System.  
Fan Key: Used to select fan mode.  
Select Auto, ON, or Program  
Controlled.  
Option Key: Enters the option  
menu.  
System Key: Use to select system.  
Select Heat, Cool or Auto.  
Program Key: Enters Program  
Mode for reviewing or chaning  
Weekday, Weekend, Daily or  
Everyday programs.  
Day/Time Key: Used for entering  
the Clock setting mode. Use with  
the Up and Down keys to set the  
time and day.  
Program-Day Key: Selects the day  
or days to review or change in  
Program Mode.  
Filter: Displays the filter usage  
counter in hours and minutes.  
Return-Clear Key: Returns to  
normal display mode. Also clears  
Filter and Energy counters, and  
HOLD modes.  
Vacation / Hold: Enters permanent and vacation  
(Programmable) HOLD modes.  
®
As an ENERGY STAR Partner, Climate Technology Corp. has determined that this  
®
programmable thermostat meets the ENERGY STAR guidelines for energy efficiency.  
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INSTALLATION  
What You Need  
This thermostat includes two #8 slotted screws and two wall an-  
chors for mounting. To install your thermostat, you should have  
the following tools and materials.  
Slotted Screwdriver(s)  
Phillips Screwdriver  
Hammer  
Electric drill and 3/16" bit  
Two 1.5 V (AA) size alkaline batteries  
Selector Switches  
In order for this Climate Technology thermostat to control your  
system, the system type must be specified by selector switch  
on the rear inside if the thermostat. There are also other selec-  
tor switches that allow you to customize the features to suit  
your needs. Refer to Figure 2 for removal of wallplate.  
System Selector Switches:  
Heat Pump or Multi-Stage selector (HP-MS switch)  
The factory position for this switch is in the “HP” position.  
Leave it in this position if you have a heat pump system or  
need emergency heat control.  
NOTE: When changing these features after installation,  
move the power switch to OFF before removing the ther-  
mostat from the wall.  
If you have a conventional multi-stage system (more than 1  
stage of heat or cool), then slide the switch to the “MS”  
position.  
NOTE: The Emergency Heat Function operates both  
stages of heat at the same time when in multi-stage  
mode.  
11  
Selector Switches (continued)  
11  
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.  
the switch can be moved to Disable. In this position, the Low  
Battery Warning will not be displayed.  
Climate Technology recommends that the Low Battery Warn-  
ing be activated by sliding the switch to Enable, especially on  
residential systems.  
If Fan operation is normal, leave the switch in the “HG” position.  
If the Fan does not come on within a minute of the thermo-  
stat calling for Heat, change the switch position to “HE.”  
This selector has no effect in the cooling mode.  
HG  
HE  
Low Batt Warning Disable  
Low Batt Warning Enable  
NOTE: “HG” position is for gas and most other systems.  
“HE” position is for certain electric systems having a  
fan relay.  
NOTE: This option is ignored when heat pump (HP) sys-  
tem is selected.  
ATTENTION: This  
thermostat is powered by  
24V AC from the system.  
Please istall 2 AAA alkaline  
HP-HEAT PUMP  
MS-MUTI-STAGE batteries for clock and  
memory backup.  
Low Battery Warning Selector  
This Climate Technology thermostat operates on your system’s  
24V AC supply. Two AAA batteries may be installed to provide  
clock operation and program retention during power outages.  
The factory position for this switch has the Low Battery Warn-  
ing Enabled. If the thermostat is to be used without batteries,  
Figure A  
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INSTALLATION  
Remove Old Thermostat  
CAUTION: Do not remove any wiring from existing ther-  
mostat before reading the instructions carefully. WIRES  
MUST BE LABELED PRIOR TO REMOVAL.  
TYPICAL HOME THERMOSTATS  
Figure 1  
IMPORTANT! Turn off the power to the furnace at the main  
power panel or at the furnace.  
Remove existing thermostat cover. See Figure 1. Some ther-  
mostats will have screws or other locking devices that must  
first be removed. Once wall mounting plate is exposed, look  
for wires.  
Wall Mounting Plate  
Thermostat  
Thermostat  
Cover  
Cover  
If wires are not visible, they may be connected to the back of  
the wallplate. Again, look for screws, tabs, etc. Some models  
have doors that open to expose wires and mounting screws.  
(See Figure 1).  
Wall Mounting Plate  
13  
Wire Labeling  
13  
Each wire coming from the wall to the existing thermostat is  
connected to a terminal point on that thermostat. Each of  
these terminal points is usually marked with a code letter as  
shown in Table A below and on the next page.  
SHOWN IN TABLE A and B ON PAGES 13-15. (For example,  
attach the label marked W to the wire that goes to the W or H  
terminal on your existing thermostat.) IGNORE THE COLOR OF  
THE WIRES since these do not always comply with the standard.  
The number of wires in your system can be as few as four  
(for single-stage systems), as many as eight, or any number  
in between. If you follow the labeling procedures correctly,  
you do not have to be concerned about how many wires  
there are.  
IMPORTANT! BEFORE DISCONNECTING ANY WIRES, APPLY  
THE SELF-ADHESIVE LABELS PROVIDED TO THE WIRE AS  
After labeling wires, disconnect them from the existing ther-  
mostat 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  
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.  
TABLE A – TERMINAL DESCRIPTIONS  
TERMINAL  
FUNCTION  
FUNCTION  
LABELS  
(HEAT PUMP MODE)  
(MULTI-STAGE MODE)  
COMMENTS  
R
24VAC supply  
24VAC supply  
Hot wire of 24VAC transformer. Powers the thermostat & system.  
Activates the 1st stage compressor. (Heat or Cool for Heat Pumps)  
Activates the 2nd stage compressor.  
Y1  
Compressor stage 1  
Compressor stage 2  
DO NOT CONNECT  
Auxiliary heating  
Cooling stage 1  
Cooling stage 2  
Heating stage 1  
Heating stage 2  
Y2  
W1  
W2  
Activates the 1st stage of heating for Multi-stage systems ONLY.  
Activates when auxillary heating is required on heat pump systems.  
Activates the 2nd stage of heating for Multi-stage systems.  
(continued)  
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INSTALLATION  
TABLE A – TERMINAL DESCRIPTIONS (continued)  
TERMINAL  
LABELS  
FUNCTION  
(HEAT PUMP MODE)  
FUNCTION  
(MULTI-STAGE MODE)  
COMMENTS  
E
O
B
Emergency heating  
DO NOT CONNECT  
Cooling damper  
Heating damper  
Activates Emergency heating ONLY when the System Switch is in  
Emergency (em) Mode. (Ignored on Multi-stage systems)  
Reversing valve  
(cooling mode)  
Activates reversing valve or damper in COOL mode.  
ALWAYS ON in COOL MODE.  
Reversing valve  
(heating mode)  
Activates reversing valve or damper in HEAT mode.  
ALWAYS ON in HEAT MODE.  
G
L
Fan  
Fan  
Activates the system Fan. (Can be Auto, On, or Program controlled)  
System monitor  
System monitor  
Activates System Check LED on the front of thermostat.  
(Controlled by the system, not the thermostat.)  
C
24VAC common  
24VAC common  
Common wire of 24VAC transformer. REQUIRED for thermostat operation.  
Positive (+) Terminal for Remote Sensor #1. Polarity MUST be maintained.  
RS1+  
Remote temperature  
sensor 1  
Remote temperature  
sensor 1  
RS1-  
Remote sensor 1 (common)  
Remote sensor 1 (common)  
Negative (-) Terminal for Remote Sensor #1. Polarity MUST be maintained.  
Positive (+) Terminal for Remote Sensor #2. Polarity MUST be maintained.  
RS2+  
Remote temperature  
sensor 2  
Remote temperature  
sensor 2  
RS2-  
Remote sensor 2 (common)  
Remote sensor 2 (common)  
Negative (-) Terminal for Remote Sensor #2. Polarity MUST be maintained.  
15  
TABLE B  
15  
HEAT PUMP CROSS-REFERENCE CHART  
EXAMPLES OF DIFFERENT SYSTEM TERMINALS  
CLIMATE  
TECHNOLOGY  
TERMINALS  
BRYANT,  
PAYNE  
RHEEM-  
RUUD  
TRANE,  
CARRIER  
COLEMAN  
COMFORTMAKER  
WEATHERTRON  
YORK  
R
LENNOX (1) LENNOX (2)  
R
Y1  
W2  
E
R
Y or Y1  
W2  
R
Y
R
Y
R
Y
R
Y
R
Y
R
Y
V-VR  
M
Y
W2  
E
W1  
W2  
E
W2  
E
W
X2  
W
W1  
E
Y
E
jumper  
to W2  
jumper  
to W2  
E
O
B
G
L
O
O
O
O
G
B
O
O
R
F
B
G
L
B
G
L
G
L or F  
C
G
G
L
G
X
B
G
L
L or X  
C, X, X1  
C
X
C, C1, X1  
X
C
X
Note:W2 wires  
no connection  
Note:  
T wire no  
connection  
NOTE: If your heat pump thermostat does not have an E wire, use the provided jumper wire to connect the E terminal to  
the W2 terminal, as shown in three examples above. Refer to the Wiring Diagrams on pages 58-59.  
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INSTALLATION  
Mount Wallplate and Thermostat  
Remove the wallplate from your thermostat by pressing the  
release tab on the bottom of the thermostat. (See Figure 2.)  
Drill holes with 3/16" bit and gently tap anchors into the  
holes until flush with wall.  
Position wallplate on wall and pull existing wires through  
large opening. Then level for appearance. Mark holes for plas-  
tic anchors provided if your existing holes do not line up with  
those on the Climate Technology wallplate.  
Reposition wallplate to wall, pulling wires through large  
opening. Insert mounting screws provided into wall anchor  
and tighten. (See Figure 3.)  
R
Figure 2  
Figure 3  
17  
Connect Wires and Mount Thermostat Cover to Wallplate  
17  
Straighten bare end of each wire and cut or strip it to 1/4”  
maximum. Insert each labeled wire into the bottom of the  
maching terminal. Refer to figures 4 and 5.  
Figure 4  
Hold the wires in each terminal and tighten the terminal  
screws securely, otherwise a loose wire could cause opera-  
tional problems with your system or thermostat.  
Push excess wire back into hole to prevent interference with  
mounting of the thermostat.  
R
Y1  
Insert  
R
Make sure the Power Switch is set to OFF.  
Y2 G C L O W2 B E R Y1 W1  
Insert two AAA size alkaline batteries, observing the polarity  
marked on the unit.  
Insert the upper tabs on the thermostat body into the slot at  
the top of the wallplate. Press bottom of the thermostat body  
to snap it into the wallplate. (NOTE: Do not force the ther-  
mostat onto the wallplate, as the terminal pins may be  
damaged. If it does not snap properly, the thermostat  
may not work.)  
Y2  
G C L O W2 B E R Y1 W1  
Switch on the main power at the panel or furnace.  
RS1+ RS1- RS2+ RS2-  
RS1+ RS1- RS2+ RS2-  
Figure 5  
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PROGRAMMING  
Option Menu  
Your thermostat has many settings that can be adjusted to fit your system and preferences.  
Press to enter the Option Menu and to change to the next option selection.  
option  
ret-clear  
Press at any time to return to normal mode.  
Local temperature sensor weighting  
option  
Local  
Temp  
or  
to change weighting between FULL,  
1
HALF or OFF.  
Remote temperature sensor 1 weighting  
option  
or  
to change weighting between FULL, HALF or  
2
Reamote-1  
Temp  
OFF. The factory default is “HALF.” The current temperature measure-  
ment from sensor 1 is shown. (Blank if not connected.)  
19  
Remote temperature sensor 2 weighting  
option  
or  
Remote-2  
Temp  
to change weighting between FULL, HALF or  
3
OFF. The factory default is “HALF.” The current temperature measure-  
ment from sensor 2 is shown. (Blank if not corrected.)  
NOTE: Refer to the Remote Sensors section on pages 51-53 for more information on sensor weightings.  
Fahrenheit or Celsius (F°/C°) selection  
Temp  
option  
or  
to change the thermostat display between  
4
Fahrenheit and Celsius.  
12 Hr or 24 Hr. Clock selection  
Clock  
or to change the time format display between  
12 hour (AM / PM) and 24 hour (military).  
option  
5
(continued)  
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20  
PROGRAMMING  
Option Menu (continued)  
Stage 1 SPAN selection  
Span Stg1  
Span Stg2  
or  
to change the SPAN setting to 1, 2, or 3. The  
option  
6
factory setting is 2. Setting 1 will cause shorter cycle times. Setting 3  
will cause longer cycle times.  
Stage 2 SPAN selection  
or  
to change the SPAN setting to 1, 2, 3, 4, 5 or 6.  
option  
7
The factory setting is 2. Lower settings will cause the 2nd stage to turn  
on sooner. Higher settings will cause the 2nd stage to turn on later.  
NOTE: Refer to the SPAN section on page 48 for more information on SPAN settings.  
Auto Season Changeover Deadband selection  
Recovery  
or  
to change the deadband between 3, 4, 5 or 6°F,  
option  
8
The factory setting is 5. (°C are about 1/2°F)  
System  
NOTE: Refer to the Auto Season Changeover section on page 43 for more information.  
21  
Auto Recovery selection  
Recovery  
or  
to enable “YES” or disable “NO” the Auto  
option  
9
Recovery Mode. The factory setting is “YES.”  
System  
To change between Heat or Cool recovery modes.  
system  
NOTE: Auto Recovery is one of the ENERGY STAR® features of this thermostat. Refer to the Auto Recovery section on  
pages 49-50 for more information.  
LCD Contrast adjustment  
or  
to change the LCD contrast between 0 and 9.  
option  
10  
LCD  
Lower numbers lighten the display. Higher numbers darken the display.  
The factory setting is 5.  
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22  
PROGRAMMING  
Setting Time and Day  
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.  
4
Monday  
Temp  
During time and day setting mode, the temperature and program  
AM  
displays will go blank.  
System  
Fan  
Example: Set the Thermostat to the current time of 2:16 PM on Saturday.  
Refer to the Steps below.  
Step 1  
Step 2  
Press to enter time and day setting mode. The current hour and the  
AM / PM indicator will be flashing.  
day-time  
Monday  
Press to change the Hour up or down to the current hour.  
AM  
or  
Note the AM / PM indicator, as the display will change at 12 AM  
and 12 PM.  
Press again to change from hour setting to minute setting. The current  
minute will be flashing.  
day-time  
Monday  
Press to change the Minute up or down to the current minute.  
PM  
or  
23  
Step 3  
Step 4  
Press again to change from minute setting to day setting. The current  
day will be flashing.  
day-time  
Saturday  
Press to change the Day up or down to the current day.  
PM  
or  
Press again to change back to the normal display.  
day-time  
2
Temp  
Saturday  
or  
AM  
ret-clear  
System  
Fan  
ret-clear  
NOTE: You may press  
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)  
formats. The AM / PM indicator will not be displayed in 24  
hour mode. Both the current time and all programs will auto-  
matically change to the selected format. The time format may  
also be changed in the Option Menu.  
time, press  
at any time while the Hour, Minute,  
option  
or Day is flashing to toggle between the 12 hour and 24 hour  
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24  
PROGRAMMING  
Programming Introduction  
Studies conducted by the Department of Energy estimate that  
setting your thermostat back 10°F (6°C) for two 8-hour periods  
during winter can reduce your fuel bill by as much as 33%. By  
setting your thermostat up 5°F (3°C) for two 8-hour periods dur-  
ing summer you can reduce your fuel bill up to 25%.  
You can program weekdays as a group, weekends as a group, all  
7 days individually or everyday as a group.  
The system fan may also be set to run continuously during a pro-  
gram time period. Finally, the number of programs per day can  
be reduced from 4 to 2 if desired.  
Your thermostat is capable of holding up to 4 separate programs  
for each day of the week.  
Your Climate Technology thermostat is pre-programmed to meet  
the ENERGY STAR® guidelines for energy efficiency.  
At power-up or after a reset, all 7 days of the week have these default programs:  
Temperature in F° (C°)  
Program Number  
Time  
6:00am  
8:00am  
4:00pm  
10:00pm  
Heat  
Cool  
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)  
The following sections describe how to change these programs.  
25  
Personal Program Schedule  
25  
Before changing programs, use this Personal Program Schedule  
to determine which times and temperature settings will best sat-  
isfy both your comfort and energy saving requirements.  
Use a pencil so you can revise your records each time you  
change your temperature settings.  
Heating  
Cooling  
Day  
Prog. 1  
Prog. 2  
Time  
Temp  
Prog. 3  
Time  
Temp  
Prog. 4  
Time  
Temp  
Day  
Prog. 1  
Prog. 2  
Time  
Temp  
Prog. 3  
Time  
Temp  
Prog. 4  
Time  
Temp  
Mon. Time  
Temp  
Mon. Time  
Temp  
Tues. Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Tues. Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Wed. Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Wed. Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Thurs. Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Thurs. Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Fri.  
Time  
Time  
Time  
Time  
Fri.  
Time  
Time  
Time  
Time  
Temp  
Temp  
Temp  
Temp  
Temp  
Temp  
Temp  
Temp  
Sat.  
Sun.  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Sat.  
Sun.  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Temp  
Time  
Time  
Time  
Time  
Time  
Time  
Time  
Time  
Temp  
Temp  
Temp  
Temp  
Temp  
Temp  
Temp  
Temp  
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26  
26  
PROGRAMMING  
Programming  
Your thermostat can be programmed for weekdays and week-  
ends, have unique programs for all 7 days, or the same pro-  
gram for everyday. Use Weekday/Weekend Programming be-  
low, 7-day Programming on page 29, or Everyday Program-  
ming on page 31 to enter or revise programs to match your  
Personal Program Schedule.  
3) The Heat setpoint can not be set higher than the  
Cool setpoint, and the Cool setpoint can not be  
set lower than the Heat setpoint.  
4) If the system selector is in AUTO mode, the  
current operating mode will be used for pro-  
gramming.  
Familiarize yourself with Manual Programming, so that you  
can easily modify your programs as your comfort needs  
change. Follow the steps below to change the program times  
and temperatures.  
5) After 15 seconds without a key press, the ther-  
mostat will return to normal display mode.  
6) When setting the program time, note the AM /  
PM indicator.  
NOTE: 1) The program time can be set in 10 minute incre-  
ments, and remains the same for both Heat and  
Cool programs.  
7) With the Auto Recovery feature enabled, you do  
not need to set your comfort program times  
early. Auto Recovery will determine how early to  
turn your system on, so that the room is com-  
fortable at the program time.  
2) The program temperature can be set in incre-  
ments of 1°F (1°C).  
27  
Weekday/Weekend Programming  
27  
Step 1  
Slide Power Switch to ON.  
2
Temp  
Thursday  
Press to select HEAT or COOL to program the corresponding system.  
(AUTO may be selected, but does not affect the programming steps.)  
on off em  
AM  
System  
Fan  
NOTE: If the power switch is in the OFF position, the last system selected will  
be programmed.  
Step 2  
Step 3  
Press to enter program mode. Weekdays are displayed and program  
1 is flashing.  
program  
1
2 3 4  
Temp  
Weekdays  
The Program hour and AM or PM indicator are flashing. Press to  
change the hour.  
AM  
or  
System  
Fan  
Step 4  
program  
Press again to change to the minute position. The current minute  
will be flashing.  
1
2
Temp  
3
4
Weekdays  
Press to change the minute.  
AM  
System  
or  
Fan  
(continued)  
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28  
28  
PROGRAMMING  
Weekday/Weekend Programming (continued)  
Step 5  
Press again to change to the program temperature. The current  
temperature will be flashing.  
program  
1
2 3 4  
Temp  
Weekdays  
Press to change the temperature.  
AM  
or  
System  
Fan  
Step 6  
Step 7  
Press again to move to the next program number.  
program  
Repeat Steps 3 through 5 to change the remaining Weekday programs.  
Press to change to Weekend programs.  
prog-day  
ret-clear  
1
2
Temp  
3
4
Weekends  
Repeat steps 3 through 5 to complete the weekend programs.  
Press at any time to exit the Program Mode.  
AM  
System  
Fan  
After 15 seconds, the thermostat will return to normal mode  
automatically.  
system  
Step 8  
Change to the other system, and repeat steps 2 through 7.  
29  
7-Day Programming  
29  
Step 1  
Slide Power Switch to ON.  
2
Temp  
Thursday  
on off em  
system  
AM  
System  
Fan  
Press to select HEAT or COOL to program the corresponding system.  
(Auto may be selected, but does not affect the programming steps)  
Step 2  
Step 3  
Step 4  
program  
prog-day  
Press to enter program mode, display shows weekday programs.  
Press 2 times to reach the Monday program.  
1
2
Temp  
3
4
Monday  
AM  
System  
Fan  
The Program hour and AM or PM indicator are flashing. Press to  
change the hour.  
or  
1
2
Temp  
3
4
Monday  
Press again to change to the minute position. The current minute will  
be flashing.  
program  
AM  
System  
Press to change the minute.  
Fan  
or  
(continued)  
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30  
30  
PROGRAMMING  
7-Day Programming (continued)  
Step 5  
Press again to change to the program temperature. The current  
temperature will be flashing.  
program  
1
2 3 4  
Temp  
Monday  
Press to change the temperature.  
AM  
or  
System  
Fan  
Step 6  
Step 7  
Press to move to programs 2, 3 and 4.  
program  
prog-day  
Repeat Steps 3 through 5 to complete the programs for Monday.  
Press to change to the next day’s programs.  
Repeat Steps 3 through 6 to complete the selected day’s programs.  
Continue repeating Steps 3 through 7 to program all 7 days of the week.  
Step 8  
Step 9  
When finished, press to return to normal mode.  
ret-clear  
system  
After 15 seconds, the thermostat will return to normal mode automatically.  
Change to the other system and repeat steps 2 through 8 above.  
31  
Everyday Programming  
31  
Step 1  
Slide Power Switch to ON.  
2
Temp  
Thursday  
on off em  
system  
AM  
System  
Fan  
Press to select HEAT or COOL to program the corresponding system.  
(Auto may be selected, but does not affect the programming steps)  
Step 2  
Press to enter program mode, display shows weekday programs.  
Press 9 times to reach the Everyday program.  
program  
prog-day  
1
2
Temp  
3
4
Everyday  
AM  
System  
Fan  
Step 3  
Step 4  
The Program hour and AM or PM indicator are flashing. Press to change  
the hour.  
or  
1
2
Temp  
3
4
Everyday  
Press again to change the minute position. The current minute will  
be flashing.  
program  
AM  
System  
Fan  
Press to change the minute.  
or  
(continued)  
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32  
32  
PROGRAMMING  
Everyday Programming (continued)  
Step 5  
Press again to change to the program temperature. The current tem-  
perature will be flashing.  
program  
1
2 3 4  
Temp  
Everyday  
AM  
Press to change the temperature.  
System  
Fan  
or  
Step 6  
Press again to move the next program number.  
Repeat Steps 3 through 5 to change the remaining programs.  
Press at any time to exit the Program Mode.  
program  
ret-clear  
After 15 seconds, the thermostat will return to Normal  
mode automatically.  
Step 7  
system  
Change to the other system and repeat steps 2 through 6.  
33  
Program Options  
Programmable Fan  
fan  
33  
Any time during programming, this will change the fan display between  
AUTO” and “ON” for the selected system and Program number. (Heat  
and Cool can be set separately.)  
1
2 3 4  
Weekdays  
Temp  
AM  
AUTO” = Fan control runs when the system is ON  
“ON” = Fan control runs continuously  
System  
Fan  
NOTE: Fan must be set to “PGM” for the Programmable Fan to  
be activated.  
2 or 4 Programs Per Day  
Any time during programming, this will change the number of programs  
per day between 2 and 4.  
option  
1
4
Weekdays  
Temp  
Program numbers 2 and 3 are turned OFF when 2 programs per  
day are selected.  
PM  
System  
Fan  
The display will show which programs are available. If only the active  
program number is displayed, then there is a difference between days of  
the selected group.  
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34  
34  
PROGRAMMING  
Reviewing Programs  
You may want to review the programs to confirm that the settings are compatible with your lifestyle.  
Press to display M - F programs.  
Weekday  
Programs  
program  
1
1
1
2 3 4  
Temp  
Weekdays  
Press repeatedly to cycle through the 4 programs.  
AM  
System  
Fan  
Press to display the Sa - Su programs.  
Weekend  
Programs  
prog-day  
program  
2
3
4
Weekends  
Temp  
Press repeatedly to cycle through the 4 programs.  
AM  
System  
Fan  
Daily and  
Everyday  
Programs  
Press to display M - F programs.  
program  
2
3
4
Weekdays  
Temp  
NOTE: Time or Temperature display will be blank when at least  
one weekday program is different. (All programs will de dis-  
played if programmed in Everyday mode.)  
System  
Fan  
35  
Daily and  
Everyday  
Programs  
(cont.)  
Press to change to Sa - Su. Again, if part of the display is blank, one of  
the weekend programs is different.  
prog-day  
program  
1
2
Temp  
3
4
Monday  
Press again to change to Monday’s program.  
AM  
System  
Fan  
Continue pressing to cycle through each day, or to reach the Everyday  
programs.  
Press repeatedly to cycle through the 4 programs.  
ret-clear Press to return to normal mode.  
After 15 seconds, the thermostat will return to normal mode  
automatically.  
NOTE: Programs take affect as soon as the thermostat returns to normal mode.  
If you are armchair programming the thermostat, slide the system selector to the OFF position before  
mounting the thermostat to the wallplate.  
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36  
OPERATION  
Power Switch  
The Power switch on the front of the thermostat determines the operating mode of the thermostat.  
You may select ON, OFF or Emergency Heat (EM). When the Power Switch is OFF, all outputs are posi-  
tively disconnected from the system.  
on off em  
NOTE: Anytime you install or remove the thermostat from the wallplate, slide the Power  
Switch to the OFF position to prevent the possibility of a rapid system On-Off.  
NOTE: When Emergency Heat (em) is selected on a multi-stage system, the thermostat will  
activate both stages of heat (W1 and W2). Thus, the heat control becomes single-stage.  
System Selection Key  
System  
System  
Press to select the desired system.  
system  
When Auto is selected, the system will change between Heat and Cool  
automatically. Refer to the Auto Season Changeover section on page 43.  
NOTE: The default system selection at power-on or after a reset  
is HEAT. Therefore it is recommended that 2 AAA batteries be  
used for backup during power outages.  
System  
System  
37  
Fan Key  
37  
Fan  
Fan  
Press to set the fan operation.  
fan  
AUTO: the fan will turn on with the system. On a multi-stage system, the  
fan is controlled by the system when the Heating system selector has  
been set to HG.  
ON: the fan will run continuously.  
Fan  
Fan  
PGM Auto or ON: (Programmable Fan) The fan will select AUTO or ON,  
depending on the setting in the programs. Refer to the Program Option  
section on page 33.  
NOTE: The fan must be set to “PGM” for the fan’s program set-  
tings to take effect.  
System Indicator Light  
When the thermostat activates your system, LED lights are turned on just below the LCD display.  
2
1 em  
red  
yellow  
green or red  
System Monitor  
This red LCD is controlled by your system and will turn on if there is a problem with your  
system. It can only work if you have a connection to the L terminal.  
(continued)  
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38  
OPERATION  
System Indicator Light (continued)  
1 em  
Stage 1 Light  
This LED will turn on in GREEN when the first stage of heat or cool is activated.  
When in Emergency Heat mode, this LED will turn on in RED when the first stage of  
emergency heat is activated.  
2
Stage 2 Light  
This LED will turn ON in YELLOW when the second stage of heat, emergency heat or  
cool is activated.  
The Stage 1/Emergency and Stage 2 LED’s will flash On/Off when the corresponding stage is being held off tem-  
porarily. For example, during a compressor delay.  
Emergency Heat  
When the Power Switch is in the “em” position, the thermostat  
is placed in the Emergency Heat mode. The compressor will not  
operate in this mode and only auxiliary heat will be used.  
NOTE: Emergency Heat Mode is not an energy saving set-  
ting, so use only when necessary.  
When Emergency Heat is selected on a multi-stage system, both  
stages of heat operate at the same time. So, the heating acts like  
a single-stage system.  
39  
Reviewing the Current Temperature Setting  
39  
Current time and temperature.  
4
Saturday  
Temp  
Thermostat is set to AUTO and the heating system is selected.  
PM  
System  
Fan  
Press for 1 second or less.  
4
Saturday  
Set Temp  
Temp  
or  
Set Temperature is shown beside current room temperature.  
If held for over 1 second, Temporary Manual Override mode is entered.  
System  
Fan  
Refer to the next section.  
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40  
40  
OPERATION  
Temporary Manual Override  
To temporarily change the current set temperature without affecting your program:  
Press  
or  
and hold for about 1 second to enter  
Manual Override mode. Display will flash.  
Press  
or  
to change to your desired new temperature.  
3
Set Temp  
Temp  
Press to return to normal mode, or wait 5 seconds for it to return automatically.  
The current program number will flash to signify the Temporary Override.  
ret-clear  
System  
Fan  
At the next program change, the Temporary Override is canceled, and  
the next program temperature becomes the setpoint temperature.  
To end the Temporary Manual Override:  
Press to return the set temperature to the current program set temperature.  
ret-clear  
NOTE: The Auto Season Changeover feature will not operate while the thermostat is in Temporary Manual Over-  
ride. Refer to the Auto Season Changeover feature on page 43 for more information.  
NOTE: If Vacation Hold is set, then the number of days remaining will also be displayed. Refer to the Vacation  
(Programmable) Hold section on page 42 for more information.  
41  
Permanent Manual Override  
41  
To hold your manual override for an extended period of time:  
at  
i
o
n
c
Press to make the current room temperature the HOLD tempera-  
ture. HOLD will alternate on the display with the day and any  
other messages.  
a
v
Hold  
hold  
Temp  
AM  
System  
Follow the Temporary Override instructions above to change the  
Fan  
Permanent Override temperature.  
You can confirm the held set temperature by pressing for less  
than 1 second.  
or  
To end the Permanent Manual Override:  
Press to return to the current program. The HOLD display will be canceled.  
ret-clear  
NOTE: The Auto Season Changeover feature will not operate while the thermostat is in Permanent Manual Over-  
ride. Refer to the Auto Season Changeover feature on page 43 for more information.  
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42  
42  
OPERATION  
Vacation (Programmable) Hold  
This thermostat can hold a fixed temperature for a selected number of days (up to 30). After the selected number of days, the thermo-  
stat will return to normal program operation. This feature allows you to return home to your normal comfort setpoint temperatures.  
at  
i
o
n
c
a
v
Press and hold for 2 seconds to enter Vacation Hold mode. The set tem-  
perature will be the current room temperature and the Vacation counter  
will be set to 1 day.  
Vacation  
hold  
Day  
Set Temp  
Temp  
Use to set the Vacation Hold temperature.  
System  
Fan  
or  
Press to set the Vacation Hold counter to the number of days you will be  
away from home.  
day-time  
“Vacation” will alternate on the display with the day and any other  
messages.  
To end Vacation Hold:  
Press to return to the current program. The flashing Vacation display will be canceled.  
ret-clear  
NOTE: The Auto Season Changeover feature will not operate while the thermostat is in Vacation (Programmable) HOLD.  
Refer to the Auto Season changeover feature on page 43 for more information.  
43  
Auto Season Changeover  
43  
When the System Selection is in AUTO position, the thermostat  
will automatically change between Heating and Cooling systems,  
depending on your program. We recommend keeping your pro-  
grammed heating and cooling temperatures at least 5°F (3°C)  
apart to allow the Auto Season Changeover to occur when the  
appropriate temperature span has been reached. However, if  
your heating and cooling programs set temperatures are close,  
there is a built-in program to prevent the thermostat from  
changing unnecessarily. This “Deadband” can be adjusted. Refer  
to the Options Menu section on pages 18-21.  
play. AUTO” will return when these holds are cleared. Auto Sea-  
son Changeover will still function in Home Today mode, as this is  
a comfort setting.  
For example, you may have the following temperatures pro-  
grammed at a given time:  
Heat Set Temp = 68°F  
Cool Set Temp = 78°F  
If the room temperature rises above 78°F, then the thermostat  
will automatically change to cool mode and turn on the air  
conditioner.  
Auto Season Changeover is disabled when the thermostat is in  
Temporary or Permanent Override, or Vacation Hold, as these  
overrides are energy saving settings. While in any of these  
modes, AUTO” will be temporarily removed form the LCD dis-  
Likewise, the thermostat will automatically change to heat mode  
and turn on heat when the room temperature falls below 68°F.  
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44  
44  
OPERATION  
Home Today  
This Climate Technology patented feature allows you to quickly and temporarily override your energy saving program setting on days  
when you are normally away from home with one key press.  
h
o
Press to enter the Home Today override. The highest program tempera-  
m
Home  
e
ture for today will be selected from your programs in Heat mode and  
Temp  
t
o
become the set temperature. (In Cool mode, Home Today will select the  
lowest program temperature for today to be the set temperature.)  
d
y a  
PM  
System  
Fan  
“HOME” will alternate on the display with the day and any other  
messages.  
When pressed during the first or second program of the day, Home To-  
day will automatically return to program control at the start of the  
fourth program of the day. If Home Today is pressed after the start of the  
third program time of the day, the thermostat will remain in Home To-  
day mode until the first program of the next day.  
h
o
If Home Today is already active, you may similarly extend it to the first  
program of the next day by pressing the key again after the start time of  
the third program.  
m
e
t
o
d
y a  
45  
If the system is changed between Heat and Cool modes (either manually  
or by Auto Season Changeover) during the “Home Today” override pe-  
riod, the setpoint temperature will be automatically updated. It will au-  
tomatically change from the highest heat program setpoint to the low-  
est cool program setpoint, or from the lowest cool program setpoint to  
the highest heat program setpoint.  
45  
at  
i
o
n
c
Press to exit Home Today mode before the schedule ending time.  
“HOME” is no longer displayed on the LCD screen, and the thermostat  
returns to the current program.  
a
v
hold  
You can manually change the setpoint temperature while in Home Today  
mode. Refer to the Temporary Manual Override instructions on page 40.  
Manually changing the set temperature while in Home Today mode will  
not affect the Home Today ending time. However, the set temperature  
will not change automatically with a manual or Automatic change be-  
tween heating and cooling.  
h
o
m
You may also press the Home Today key while in Temporary Manual  
e
Override. The operation is the same as the previous point above.  
t
o
d
y a  
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46  
OPERATION  
Energy Monitor  
The Energy monitor feature measures and stores the amount of  
time the heating and air conditioning system operates. Usage  
can be displayed for Today (since 12AM), Yesterday, This Month  
(up to 30 days), Last Month (last 30 days), and Total (up to 999  
Hrs. 59 Min.). By monitoring your energy usage, you see how  
much the setback periods are saving and you can test program  
adjustment to save even more. Use table on page 25.  
or  
To review energy usage, press to cycle through Today, Yesterday, [num-  
ber] Days, Last 30 days, and Total. Press again to return to normal mode,  
it  
Today  
n
o
y
m
or wait 15 seconds for the display to return to normal mode. You can  
also return to normal mode at any time by pressing RET CLEAR.  
g
r e  
Hr  
Min  
n e  
For example: This LCD display shows Today’s usage to be 10 Hours, 26  
minutes.  
Press and hold for 3 seconds to reset the Energy Monitor’s counters  
while in Energy Monitor mode. The display will blink, and all counters  
will be cleared to zero.  
ret-clear  
47  
Filter Monitor  
47  
Your thermostat also keeps a record of the number of hours your filter has been in use. To maximize your system’s performance and en-  
ergy efficiency, change or clean your filter regularly.  
When the total system run time for heat and cool reaches 500 hours,  
“FILTER” will alternate on the display with the day to remind you to  
4
Filter  
Temp  
clean or change your system’s filter. “FILTER” will continue to display  
until the counter is set back to zero.  
PM  
System  
Fan  
Press to review total filter usage. After 15 seconds, the display will re-  
turn to normal mode, or you can hit RET CLEAR to exit immediately. The  
Filter Monitor will display up to 999 hours and 59 minutes of usage.  
filter  
In this example, the counter is at 410 Hours, 26 minutes.  
Filter  
ret-clear  
To reset the Filter Monitor counter, hold for 3 seconds.  
Hr  
Min  
The display will blink, and the counter will be reset to zero.  
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48  
OPERATION  
SPAN Settings  
STAGE 1  
STAGE 2  
Your thermostat is set at the factory to cycle at 1°F (0.5°C)  
above and below the set temperature in Stage 1. (Span = 2.) This  
setting has been designed to provide a comfortable room tem-  
perature under most all conditions. However, if you find your sys-  
tem cycling too fast or too slow, then the Span can be adjusted  
to modify the cycle time. Refer to the Option Menu Stage 1 Span  
selection on page 20.  
The second (or auxiliary) stage turns on when the first  
stage does not have enough capacity to reach the desired  
set temperature.  
The factory setting for Stage 2 Span is 2. It can be adjusted be-  
tween 1 to 6; with the second stage being activated sooner at  
lower numbers and later at higher numbers.  
Span = 1. This decreases the cycle time by causing your  
system to run shorter.  
Span = 3. This increases the cycle time by causing your  
system to run longer.  
The Span settings remain the same for both HEAT and COOL.  
The Span can be changed at any time and is independent of pro-  
gram times or temperatures.  
When the thermostat is powered on or the Reset key is pressed,  
the Span is reset back to setting 2.  
49  
Auto Recovery  
49  
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. In Heat  
Pump mode, it also maximizes the efficiency of recovery by mini-  
mizing the use of auxiliary heat, which results in maximum sav-  
ings in various weather conditions.  
When the thermostat is  
in Auto Recovery mode,  
the display will alternate  
“RECOVERY” with the  
day, and the program  
indicator will flash.  
2
Temp  
Recovery  
PM  
System  
Fan  
Details of Auto Recovery Operation:  
Auto Recovery calculates how early to turn your system back On,  
so that the room temperature is already comfortable by the start  
of the comfort temperature program period. Auto Recovery  
works in both Heat and Cool modes.  
Auto Recovery can be disabled by selecting “NO” in the Op-  
tion Menu. Refer to page 21.  
Auto Recovery will not operate if Permanent hold, Vacation  
hold Temporary hold or Home Today is in operation. It will  
also not operate if the thermostat resets due to AC power loss  
with no backup batteries.  
Auto Recovery can be canceled manually if RET CLEAR is  
pressed during the recovery process. If a recovery process is  
canceled manually then the recovery process will not start  
again until the next program period starts (an exception is  
that if time or program is changed then the thermostat will  
check Auto Recovery conditions immediately).  
For example, in Heat mode, you could have the following  
programs:  
Program #4 (Overnight)  
Set Temp = 60°F  
Time = 10PM  
Program #1 (Morning)  
Set Temp = 68°F  
Time = 6AM  
The room temperature fell to 60°F overnight. Rather than having  
the thermostat turning on at 6AM, Auto Recovery would note  
the temperature difference between 60°F and 68°F and turn the  
Heat on approximately 30 minutes early. Therefore, the room  
temperature at 6AM would be about 68°F instead of 60°F.  
(continued)  
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50  
50  
OPERATION  
Auto Recovery (continued)  
Auto Recovery will be canceled if HOME TODAY or HOLD is  
pressed during the recovery process. The thermostat will enter  
Home Today, Permanent hold or Vacation hold.  
If the system changes between heat and cool (automatically  
or manually) then the thermostat will recalculate Auto Recov-  
ery again. Setpoint temperature will be changed to the oppo-  
site system’s comfort temperature if the recovery entry criteria  
are still met. Otherwise, the recovery process will be canceled  
and return to program control mode.  
Auto Recovery will be canceled and change to Temporary  
Manual Override mode if the setpoint is adjusted during the  
recovery process.  
Keyboard Lock  
The Keyboard can be locked to prevent unauthorized changes to the thermostat.  
To lock or unlock the keyboard, press and hold BOTH keys for 3 seconds.  
The keyboard is locked when KEY LOCK appears on the display.  
1
Key Lock  
Temp  
and  
AM  
System  
Fan  
All keys are locked, but any time a key is pressed, KEY LOCK will appear  
on the display for 1 second and the backlight will operate.  
51  
Backlighting (INDIGLO® Night-Light)  
51  
Your thermostat has an electroluminescent lamp that backlights  
the display for easy viewing in the dark.  
erate several keys. The backlight will decrease in brightness be-  
fore shutting off.  
When any key is pressed the display is illuminated.  
NOTE: The backlight is powered by the 24V AC supply. It  
will not operate when there is an AC power interruption  
or if the thermostat is removed from the wallplate.  
The display will remain illuminated for 15 seconds after the last  
key is pressed. This allows the light to stay on if you need to op-  
Remote Sensors  
This Climate Technology thermostat supports the addition of 1 or  
2 optional remote sensors (Model 43658). Along with the sensor  
inside the thermostat (Local), the displayed room temperature can  
be a weighted average of these sensors. The Option Menu on  
pages 18-21 shows how to change the weighting of each sensor.  
How to use the weights to control temperature:  
To take a simple average of all sensors, set all of them to  
FULL or HALF. (This gives the same result because the  
weight is the same.)  
To give priority to one area over another, set the priority sen-  
sor to FULL and the other 1 or 2 sensors to HALF. (Setting 2  
sensors to FULL and the 3rd to HALF gives even more weight  
to sensors 1 and 2.)  
Description of the weightings:  
FULL = The full temperature value is used in the averaging  
calculation  
To control only from the reading of a single Remote sensor,  
set the desired sensor to FULL, and the other Remote and Lo-  
cal sensor to OFF.  
HALF =Half of the temperature value is used in the averaging  
calculation  
OFF = The temperature is ignored, and not used in the aver-  
aging calculation.  
(continued)  
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52  
OPERATION  
Remote Sensors (continued)  
Notes on sensor calculations:  
If the sensor reading exceeds temperature limits (“HI” or “LO”) then the maximum or  
minimum value will be used in the calculation.  
If all 3 sensors are set to OFF, the Local sensor will automatically be set to FULL.  
If there is a problem with the installed remote sensors, then the Local sensor reading  
will be used for the temperature.  
Detection of Remote Sensors:  
2
Temp  
Found RM1  
When AC power is present, the thermostat can detect any remote sensors connected. (It  
may take up to 30 seconds.) “Found RM1” or “RM2” will alternate with the day display.  
AM  
System  
The maximum distance a remote sensor can be wired to the thermostat is 328 ft.  
(100m). For short distances up to 100 ft. (30m), standard thermostat wire will work. For  
longer distances, or environments with a lot of RF noise, shielded or twisted pair wire  
should be used.  
Fan  
2
Temp  
Check RM1  
If the thermostat has a problem communicating with a remote sensor, then “Check  
RM1” or “RM2” will alternate with the day display.  
AM  
System  
Fan  
53  
Review Remote Sensor Temperatures:  
Press to see the currently measured temperature for each sensor, along  
with its weight.  
option  
Example: Standard display  
2
Temp  
Thursday  
AM  
System  
Fan  
Local Sensor  
Local  
Remote Sensor 1  
Remote Sensor 2  
Remote-1  
Remote-2  
Temp  
Temp  
Temp  
option  
option  
The system is controlling around the weighted average of 68°F, based on readings of 70°F, 67°F and 65°F.  
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SAFETY FEATURES  
AC Power Monitor  
This thermostat operates on 24V AC, which is provided by your system’s transformer. If  
the system loses electricity, then the 24V AC power is lost also.  
The 2 AAA batteries provide backup operation of the clock, as well as all programs  
and settings.  
If the AC power is lost, then the LCD display will alternate “No AC Pwr” with the day.  
3
Temp  
No AC Pwr  
Without AC power, the following functions are disabled:  
- The system is turned off.  
PM  
System  
Fan  
- The Backlight function is disabled.  
- The remote sensor temperature readings are not available.  
Low Battery Warning  
Your thermostat has a low battery warning system. When the  
AAA alkaline batteries. You  
have 30 seconds to change  
the batteries before the set-  
tings are lost.  
3
Temp  
Low Batt  
batteries are detected to be weak, the low battery warning is  
indicated by “Low Batt” alternating on the LCD display with  
the day. You then need to replace the batteries with 2 new  
PM  
System  
Fan  
55  
Error Mode  
55  
If the thermostat is unable to control your system due to an  
unexpected problem, the thermostat will enter Error Mode. In  
this condition, the thermostat flashes “Error” and a code num-  
ber on the LCD display, and shuts off your system.  
to the keypad. You will  
need to reprogram your  
thermostat and confirm  
normal operation.  
Error  
To correct this problem, replace the batteries with 2 new  
AAA alkaline batteries, even if you have recently replaced  
them. Next, use a paper clip to press the RESET button next  
If Error Mode returns, please  
call Climate Technology Tech-  
nical support at 800-676-7861 for further information.  
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56  
TROUBLESHOOTING  
Problem  
Solution  
SCRAMBLED OR DOUBLE DISPLAY  
(numbers over numbers)  
1. Remove clear Mylar sticker  
NO DISPLAY  
1. Check terminal connection. A common (C) wire is required for operation.  
2. Check battery connections and batteries.  
3. Press RESET button with a small pin and hold in for two seconds.  
1. Replace Batteries  
ENTIRE DISPLAY DIMS  
2. Adjust LCD contrast in the Option Menu.  
1. Check that the time is set properly to AM” or “PM”.  
2. Check that the thermostat is not in “HOLD” or “Home Today” modes.  
3. Check for the correct day setting.  
PROGRAM DOES NOT CHANGE  
AT YOUR DESIRED SETTING  
4. Check any remote sensor readings or weights.  
AUTO / FAN DOES NOT TURN ON  
FAN RUNS CONTINUOUSLY  
1. Move HG/HE selector to opposite position  
1. Check fan setting. It may be “ON” or in Programmable Fan mode “PGMON”.  
57  
Problem (cont.)  
Solution (cont.)  
57  
HEATING OR COOLING DOES  
NOT GO ON OR OFF  
1. Check that the system selector key is in the correct position (“HEAT,” “COOL”  
or AUTO”).  
2. The thermostat may be in the AUTO mode. Look for AUTO” on the LCDdisplay.  
If the Heat and Cool program temperatures are close, then the thermostat re-  
quires a larger room temperature change before changing from Heat or Cool.  
3. There may be as much as a 4 minute delay before the Heat or Cool system turns  
On - wait and check. (Compressor protection delay.)  
4. Check your circuit breakers and switches to ensure there is power to the system.  
5. Replace batteries.  
6. Make sure your furnace blower door is closed properly.  
7. Check the position of the Heat Pump or Multi-Stage selector switch.  
ERRATIC DISPLAY  
1. Press the RESET button once with a small pin and hold for two seconds.  
The thermostat will need to be re-programmed.  
IF UNIT CONTINUES TO OPERATE  
IN THE OFF POSITION  
1. Replace unit.  
THERMOSTAT PERMANENTLY  
READS “HI,” “LO,” OR “Error”  
AFTER PRESSING RESET BUTTON  
1. Replace unit.  
If you experience any other problems, call 800-676-7861 from 8 AM to 5 PM Central Time for technical assistance.  
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58  
WIRING DIAGRAMS  
HEAT PUMP SYSTEMS  
Some terminals may not be used  
THERMOSTAT WALLPLATE TERMINALS  
Optional Jumper*  
Y2  
G
C
L
O
W2  
B
E
R
Y1  
W1  
X
Compressor  
Stage 2  
Fan  
Relay  
System  
Monitor  
Reversing  
Auxiliary Reversing  
Emergency 24V  
Compressor  
Valve Cool Heat  
Valve Heat Heat  
Supply Stage 1  
Common  
NOTE: Common wire connection is REQUIRED.  
*Add jumper between W2 and E  
on systems without an E wire.  
X - No Connection  
59  
59  
MULTI-STAGE SYSTEMS  
Some terminals may not be used  
THERMOSTAT WALLPLATE TERMINALS  
Y2  
G
C
L
O
W2  
B
E
R
Y1  
W1  
X
Cool  
Stage 2  
Fan  
Relay  
System  
Monitor  
Cool  
Damper  
Heat  
Stage 2  
Heat  
Damper  
24V  
Supply  
Cool  
Heat  
Stage 1 Stage 1  
Common  
NOTE: Common wire connection is REQUIRED.  
X - No Connection  
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Climate Technology Corp.  
2500 FRISCO AVENUE  
MEMPHIS, TN 38114  
A Hunter Fan company  
© 2004, Climate Technology Corp Form No. 41653-01, 01/27/04  

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