Carrier Thermostat Thermostat User Manual

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Programmable Thermostats  
Visit www.carrier.com  
Installation, Start-Up, and Operating Instructions  
NOTE: Read the entire instruction manual before starting the  
installation.  
As an ENERGY STAR Partner, Carrier Corporation has  
determined that this product meets the ENERGY STAR  
This symbol  indicates a change since the last issue.  
guidelines for energy efficiency.  
INDEX  
Page  
SAFETY CONSIDERATIONS.....................................................1  
INTRODUCTION..........................................................................1  
INSTALLATION CONSIDERATIONS.......................................1  
INSTALLATION......................................................................2-12  
Location.....................................................................................2  
Set DIP Switches ......................................................................2  
Install Thermostat..................................................................2-3  
Set Thermostat Configuration...............................................3-4  
Check Thermostat Operation ................................................4-5  
Final Settings ............................................................................5  
Checklist....................................................................................5  
WIRING DIAGRAMS .............................................................6-12  
A98426  
OPERATIONAL OPERATION ..................................................13  
TROUBLESHOOTING ...............................................................13  
CONFIGURATION RECORD....................................................14  
HEIGHT (IN.)  
-1/4  
WIDTH (IN.)  
DEPTH (IN.)  
4
7-1/2  
1-3/8  
SAFETY CONSIDERATIONS  
Read and follow manufacturer instructions carefully. Follow all  
local electrical codes during installation. All wiring must conform  
to local and national electrical codes. Improper wiring or installa-  
tion may damage thermostat.  
Fig. 1—Carrier Programmable Thermostat  
Models  
Recognize safety information. This is the safety-alert symbol  
.
There are 3 different models. The 9th and 10th letters of the part  
number indicate the model. These 2 letters appear on the package  
and on the circuit board. Be sure to have the proper thermostat for  
the intended application. Models are:  
When you see this symbol on the equipment and in the instruction  
manual, be alert to the potential for personal injury.  
Understand the signal words DANGER, WARNING, and CAU-  
TION. These words are used with the safety-alert symbol. DAN-  
GER identifies the most serious hazards which will result in severe  
personal injury or death. WARNING signifies a hazard which  
could result in personal injury or death. CAUTION is used to  
identify unsafe practices which would result in minor personal  
injury or product and property damage.  
AC - 1-stage cool, 1-stage heat - for AC systems only.  
HP - 1-stage cool, 2-stage heat - for either HP or AC with 2-stage  
heat.  
2
S - 2-stage cool, 2-stage heat - for 2-speed AC systems, or  
2
1
3
-stage cool, 3-stage heat - for 2-speed HP systems, or  
-stage cool, 4-stage heat - for 1-speed HP with special  
-stage electric heat.  
INTRODUCTION  
Carrier’s 7-day programmable thermostats are wall-mounted, low-  
voltage thermostats which maintain room temperature by control-  
ling the operation of a heating and air conditioning system.  
Separate heating and cooling setpoints, plus auto changeover allow  
setback programming for maximum energy savings. All of the  
thermostats allow up to 4 time/temperature settings to be pro-  
grammed per 24 hr period and store programs for 7 independent  
days. Batteries are not required; during a power interruption, the  
internal memory stores programs for an unlimited time and the  
clock continues to run for at least 72 hrs.  
Use each only for its intended purpose. (See Table 1.)  
Outdoor Temperature Sensing  
All Carrier programmable thermostats may be equipped with an  
optional  
outdoor  
temperature  
sensor,  
Part  
No.  
TSTATXXSEN01-B. If it is to be used, plan installation so that 2  
wires can be run from the thermostat to an outdoor location,  
preferably on the north side of the house OR refer to Installation  
Instructions included with the outdoor temperature sensor for  
simplified connection. Sensor can be mounted to outdoor unit and  
existing control wires used for its connection. Details are provided  
to the sensor instructions.  
INSTALLATION CONSIDERATIONS  
Power  
Note that all TSTAT models require no batteries and are not  
INSTALLATION  
"power stealing". They do require 24VAC (R and C terminals) to  
Step 1—Thermostat Location  
be connected for proper operation. Thermostat will not operate  
without these 2 connections.  
Thermostat should be mounted:  
Approximately 5 ft (1.5m) from floor.  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book  
Replaces: TSTAT-10SI  
Tab misc. misc.  
1
4
PC 101  
Catalog No. 03TS-TA2  
Printed in U.S.A.  
Form TSTAT-15SI  
Pg 1  
9-98  
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Close to or in a frequently used room, preferably on an inside  
partitioning wall.  
 Switch D - Intelligent Heat Staging Select  
Active on 2S models only)  
(
On a section of wall without pipes or duct work.  
This switch converts a 2-speed heat pump thermostat with 1 stage  
of auxiliary heat into a 1-speed heat pump thermostat with 3 stages  
of auxiliary heat for comfortable leaving air temperature. It  
requires selected heaters with 2:1 ratio element sizes plus an FK,  
FV, 40FKA fan coil. Refer to variable-speed fan coil literature for  
details.  
Thermostat should NOT be mounted:  
Close to a window, on an outside wall, or next to a door leading  
to the outside.  
Exposed to direct light and heat from a lamp, sun, fireplace, or  
other temperature-radiating object which may cause a false  
reading.  
TO SET:  
OFF—for normal 2-speed operation. This is factory default.  
ON—for intelligent 3-stage heat with FK, FV, 40FKA fan coil.  
Close to or in direct airflow from supply registers and return-air  
grilles.  
Step 3—Install Thermostat  
In areas with poor air circulation, such as behind a door or in  
an alcove.  
Step 2—Set DIP Switches  
Before installing thermostat, turn off all power to unit. There  
may be more than 1 power disconnect. Electrical shock can  
cause personal injury or death.  
There is a 4 section DIP switch within the thermostat which must  
be properly set by the installer. It is easiest to set these 4 switches  
before the thermostat is mounted to the wall, so STOP and  
complete the following steps:  
1
2
. Turn OFF all power to unit.  
. If an existing thermostat is being replaced:  
a. Remove existing thermostat from wall.  
1
2
3
. Open hinged thermostat cover.  
. Remove cover completely by snapping it apart at hinge.  
b. Disconnect wires from existing thermostat, 1 at a time. Be  
careful not to allow wires to fall back into the wall.  
. Open thermostat by pressing back half of the right end of  
plastic case inward while, at the same time, pulling front and  
back halves apart at the right end. The 2 halves will swing  
apart.  
c. As each wire is disconnected, record wire color and  
terminal marking.  
4
5
. Snap hinge apart to completely separate the 2 halves.  
d. Discard or recycle old thermostat.  
NOTE: Mercury is a hazardous waste and MUST be disposed of  
properly.  
. Switches are located in upper right corner of circuit board. To  
change switch position, use corner of a small screwdriver to  
slide switch to opposite position.  
3. Open thermostat rear door (mounting base) to expose mount-  
ing holes. The base can be removed to simplify mounting.  
Snap apart carefully at hinge to separate mounting base from  
remainder of thermostat.  
6
. After switches have been set, do not reassemble the 2 halves.  
The rear plastic will be first mounted to wall.  
Switch A - Zoning Select (Active on all models)  
4
. Route thermostat wires through large hole in mounting base.  
Level mounting base against wall (for aesthetic value  
only—thermostat need not be leveled for proper operation)  
and mark wall through 2 mounting holes.  
This switch selects or defeats the 4 cycles per hour limit and a  
5
-minute compressor timeguard. These timers MUST be enabled  
for normal operation and disabled for zoning applications. (In  
zoning applications the zone control center performs these timing  
functions.)  
5
. Drill two 3/16-in. mounting holes in wall where marked.  
TO SET:  
6. Secure mounting base to wall with 2 screws and anchors  
provided, (additional anchoring holes available for more  
secure mounting if needed) making sure all wires extend  
through hole in mounting base.  
OFF— for normal operation. This is the factory default.  
ON—for zoned installations ONLY.  
Switch B - Setback Recovery (Active on all models)  
7
. Adjust length and routing of each wire to reach proper  
terminal and connector block on mounting base with 1/4 in. of  
extra wire. Strip only 1/4 in. of insulation from each wire to  
prevent adjacent wires from shorting together when con-  
nected.  
Selects between normal and smart recovery from setback. Normal  
recovery changes to the new setpoint at the programmed time.  
Smart recovery, which is active in heating mode only, starts earlier  
and adjusts the setpoint slowly so that room temperature will arrive  
at the programmed temperature at the programmed time.  
TO SET:  
8. Match and connect equipment wires to proper terminals of the  
connector blocks. (See Table 1, and Fig. 2 through 24.) Both  
R and C must be connected for proper thermostat operation.  
OFF—for smart recovery. This is the factory default.  
ON—for normal recovery.  
Switch C - HP/AC Select (Active on HP and 2S models only)  
Use to select between AC and HP installations. HP and 2S models  
have an extra relay to control the HP reversing valve. When a HP  
thermostat is placed in the AC mode, this extra relay is converted  
to a second stage heat output. This allows thermostat control of  
Improper wiring or installation may damage the thermostat.  
Check to make sure wiring is correct before proceeding with  
installation or turning on unit.  
2
-stage furnaces or 2-stage strip heat with AC systems. (AC mode  
9
. Push any excess wire into wall and against mounting base.  
Seal hole in wall to prevent air leaks. Leaks can affect  
operation.  
also uses W rather than Y for first-stage heat.)  
TO SET:  
OFF—for HP applications. Extra relay controls reversing valve.  
This is factory default.  
1
0. Snap hinge back together.  
ON—for AC applications. Extra output can be used for 2-stage  
heat.  
11. Close thermostat assembly making sure pins on back of circuit  
board align with sockets in connector.  
2
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Table 1—Model Selection and Wiring Diagram Chart  
INDOOR  
UNIT  
AIR CONDITIONER  
HEAT PUMP  
1 Speed  
2 Speed  
1 Speed  
2 Speed  
1
-Stage  
Model AC  
See Fig. 2  
Model 2S  
See Fig. 8  
Requires Dual Fuel Ther-  
mostat  
Model 2S  
See Fig. 11  
Furnace  
2
-Stage  
Model AC  
See Fig. 3  
Model HP  
See Fig. 4  
Model 2S  
See Fig. 9  
Requires Dual Fuel Ther-  
mostat  
Model 2S  
See Fig. 12  
Furnace  
Model AC  
See Fig. 5  
Model HP  
See Fig. 6  
Model 2S  
See Fig. 10  
Model HP  
See Fig. 7  
Model 2S  
See Fig. 13  
Typical Fan Coil  
Variable-Speed  
Model AC  
See Fig. 15  
Model HP  
See Fig. 16  
Model 2S  
See Fig. 17  
Model 2S  
See Fig. 14  
Model 2S  
See Fig. 18  
(FK, FV, 40FKA)  
Fan Coil  
1
2. Turn ON power to unit.  
On power up, all display segments will light for 5 sec. For the next  
sec, a 2-digit code appears on large display which identifies  
thermostat configuration:  
press SET TIME/TEMP button once. The large display will now  
flash, indicating that up and down buttons now control available  
choices within that option. Each press of SET TIME/TEMP button  
switches between available option (small display) and available  
selections within each option (large display).  
5
1
2
3
4
5
. AC—for 1-speed air conditioner  
. HP—for 1-speed heat pump  
. A2—for 2-speed air conditioner  
. H2—for 2-speed heat pump  
CONFIGURATION OPTIONS — SELECTION:  
Option 1—Anticipator Adjustment  
This adjustment controls sensitivity and cycle rate of thermostat.  
Higher numbers decrease sensitivity and slow cycle rate. Lower  
numbers increase sensitivity and cycle rate. However, a limiting  
feature will not allow more than 4 cycles per hr, regardless of  
setting. Anticipator values can range from 1 to 9. Factory default  
is 3. This default setting will provide optimum performance in  
nearly all installations. Try it first. Do not change setting unless  
there is evidence of the need to do so.  
. HS—for intelligent heat staging with FK, FV, 40FKA Fan  
Coil and 1-speed heat pump  
When this identifier disappears, normal operation begins. The  
MODE control should be set to OFF and FAN control to AUTO,  
so equipment does not start until further configuration and check-  
out is completed.  
Step 4—Set Thermostat Configuration  
Unlike conventional anticipators, this setting is not determined by  
current draw. There is no need to measure, know, or compensate  
for current draw. There is also no droop with this thermostat.  
Regardless of setting and number of stages, both heating and  
cooling will control to their respective set points.  
Configuration options, like DIP switch settings, are intended to be  
selected at installation and normally are not modified by the  
homeowner. These options are not discussed in the Homeowner’s  
Manual and therefore must be made as part of the installation. A  
special procedure allows entry into the configuration mode. While  
in configuration mode, 7 selections can be made. A description of  
each of these and how to use the configuration mode follows.  
TO ADJUST:  
1. Enter configuration mode if not already there. See above. The  
upper small (COOL set point) display will be flashing 01. If  
not, use up and down buttons to move it to 01.  
CONFIGURATION OPTIONS — SUMMARY:  
Option 01—Anticipator adjustment  
2
. Press SET TIME/TEMP button once to flash current selection  
of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display. Factory default  
is 3.  
Option 02—Clean filter timer adjustment  
Option 03—Fahrenheit or Celsius operation  
Option 04—Enable fan (G) ON with any heat (W)  
Option 05—07—Not applicable  
3
4
. Use up and down buttons to move between available choices.  
. Press SET TIME/TEMP button again to flash upper small  
display for selection of another option, or press END to exit  
configuration mode.  
Option 08—Auxiliary heat lockout temperature adjustment  
Option 09—12—Not applicable  
Option 13—Room temperature offset adjustment  
Option 14—Not applicable  
Option 2—Clean Filter Timer  
Select hours of blower operation (heating, cooling, or fan) before  
CLEAN FILTER icon is displayed. With OFF selected, icon will  
never come on, disabling this feature. Time selection can range  
from 400 to 3600 hr by selecting numbers 1 through 9. (Time is  
400 X number selected.) Factory default is 2 (800 hr). Recom-  
mended selections are: disposable filter—400 to 800 hr, media  
filter—1200 to 1600 hr, or electronic air cleaner—1600 to 2400 hr  
of blower operation.  
Option 15—Enable AUTO mode  
TO ENTER CONFIGURATION MODE:  
Press and hold FAN button for approximately 10 sec until COOL  
set point display indicates a flashing 01. The thermostat is now in  
configuration mode. It will automatically exit this mode if no  
button is pressed for 3 minutes. Pressing END button will exit  
configuration mode immediately.  
TO SELECT OR ADJUST:  
WHILE IN CONFIGURATION MODE:  
1
. Enter configuration mode if not already there. See above. Use  
up and down buttons to make small (now flashing) display  
indicate 02.  
The upper small (COOL set point) display indicates selected  
option number and large display indicates selection made within  
that option. One of these will be flashing. The up and down buttons  
are used both to move between available options and to make  
selection for each option. When option number (small display) is  
flashing, up and down buttons adjust it, moving between available  
option numbers. After desired option number has been selected,  
2
. Press SET TIME/TEMP button once to flash the current  
selection of OF, 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.  
Factory default is 2.  
3. Use up and down buttons to move between available choices.  
3
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4
. Press SET TIME/TEMP button again to flash upper small  
display for selection of another option, or press END to exit  
configuration mode.  
higher or lower value. The selected number is number of degrees,  
plus or minus, which will be added to actual temperature. The  
numbers can range between -5 and +5. Factory default is 0. This  
adjusted value will be used as actual temperature for both display  
and control action. For example, if 2 is selected, 72°F actual will  
read 74°F. If set point is 72°F, the room will control to an actual  
temperature of 70°F which will be displayed and acted upon as if  
it were 72°F. The effect is that a positive number selection will  
make the room temperature lower and vice versa. The thermostat  
is calibrated within an accuracy of plus or minus 1° when shipped  
from the factory, so this adjustment will provide the best accuracy  
when set to 0.  
Option 3—Fahrenheit or Celsius Operation  
Select between Fahrenheit and Celsius operation. Factory default  
is Fahrenheit.  
TO SELECT OR ADJUST:  
1
. Enter configuration mode if not already there. See above. Use  
up and down buttons to make small (now flashing) display  
indicate 03.  
2
3
4
. Press SET TIME/TEMP button once to flash current selection  
of F or C. Factory default is F.  
TO SELECT:  
1
. Enter configuration mode if not already there. See above. Use  
up and down buttons to make small (now flashing) display  
indicate 13.  
. Use up and down buttons to move between F and C on large  
display.  
. Press SET TIME/TEMP button again to flash upper small  
display for selection of another option, or press END to exit  
configuration mode.  
2
. Press SET TIME/TEMP button once to flash large display.  
3. Use up or down buttons to move between -5, -4, -3, -2, -1, 0,  
, 2, 3, 4, or 5 on large display. Factory default is 0.  
1
Option 4—Enable Fan (G) On With Any Heat (W)  
4
. Press SET TIME/TEMP button again to flash upper small  
display for selection of another option, or press END to exit  
configuration mode.  
This selection determines whether the G (fan) output is to be on or  
off when any W (furnace or strip heat) output is ON. Most fan coils  
manage their own blowers and do not require a separate G signal.  
For these applications, select OF (off). Some auxiliary heaters  
require a separate G signal to turn on the blower. In this case,  
select ON. Factory default is OF.  
Option 15—Enable Auto Mode  
This option allows the installer to enable or disable AUTO mode  
automatic changeover between heat and cool). When disabled,  
(
TO SELECT:  
AUTO icon does not appear when successive presses of MODE  
button are used to move between OFF, HEAT, COOL, and  
EHEAT (in heat pump systems). Factory default is ON (AUTO  
enabled).  
1
. Enter configuration mode if not already there. See above. Use  
up and down buttons to make small (now flashing) display  
indicate 04.  
TO SELECT:  
2
3
4
. Press SET TIME/TEMP button once to flash currect selection  
of OF or ON. Factory default is OF.  
1. Enter configuration mode if not already there. See above. Use  
up and down buttons to make small (now flashing) display  
indicate 15.  
. Use up and down buttons to move between OF and ON on  
large display.  
2
. Press SET TIME/TEMP button once to flash large display.  
. Press SET TIME/TEMP button again to flash upper small  
display for selection of another option, or press END to exit  
configuration mode.  
3. Use up and down buttons to move between OF and ON on  
large display. Factory default is ON (AUTO enabled).  
Option 8—Auxiliary Heat Lockout Temperature  
4. Press SET TIME/TEMP button again to flash upper small  
display for selection of another option, or press END to exit  
configuration mode.  
Present in heat pump and 2-speed models only when configured as  
a heat pump. Outdoor temperature sensor must be attached. This  
option allows selection of an outdoor temperature of 5 through  
Step 5—Check Thermostat Operation  
5
5°F in 5° steps (or equivalent values in C), or OF (off). Auxiliary  
Before doing the checkout, press HOLD button to turn on HOLD  
icon, locking thermostat in hold mode. This will assure set points  
don’t change during the checkout. Outputs for each stage of  
operation are listed in Table 2. In the table, the actual use of each  
terminal is underlined for terminals having double use.  
heat is prevented from operating for outdoor temperatures above  
the selected temperature. If OF (off) is selected, auxiliary heat is  
allowed at all outdoor temperatures. If selected, emergency heat  
(EHEAT) overrides this feature. Factory default is OF.  
TO SELECT:  
TO TEST THE FAN:  
1
. Enter configuration mode if not already there. See above. Use  
up and down buttons to make small (now flashing) display  
indicate 08.  
1
. Press FAN button. The fan ON icon and the G output will go  
on within a few seconds, causing fan to operate.  
2
. Pressing FAN button again will turn off the G output and turn  
off fan AUTO icon.  
2
3
. Press SET TIME/TEMP button once to flash large display.  
. Use up or down buttons to move between OF, 5, 10, 15, 20,  
TO TEST COOLING:  
2
5, 30, 35, 40, 45, 50, or 55 on large display. Factory default  
is OF.  
Press MODE button until COOL icon under it turns on. Press  
down button until cool set point (upper right 2 digit display with  
COOL now flashing under it) is 2° or 3° below room temperature.  
This will create a cooling demand. A small triangle to the left of  
this COOL icon will flash or come on continually. Flashing means  
the equipment is going to turn on but is presently being held off by  
a system timer. (See Operational Information for timer descrip-  
tions.) Defeat the timer by pressing INCREASE TEMPERATURE  
button (up and FAN buttons together). This will make the triangle  
4
. Press SET TIME/TEMP button again to flash upper small  
display for selection of another option, or press END to exit  
configuration mode.  
Option 13—Room Temperature Offset Adjust  
This option allows calibration (or deliberate miscalibration) of  
room temperature sensor. There are various reasons why home-  
owners may want to have displayed temperature adjusted to a  
4
stay on and turn Cool Stage 1 on. For actual outputs, refer to Table  
, making sure the correct row from the table is selected. To turn  
off, raise cooling set point above the room temperature. Cool Stage  
and the triangle will turn off within a few seconds.  
TO TEST EMERGENCY HEAT (heat pump systems only):  
2
To test, press MODE button until EHEAT icon turns on. This will  
allow operation of auxiliary heat only. Raising set point above  
room temperature will turn on the first stage of auxiliary heating  
(W/W1). Raising set point more than 5° above room temperature  
will advance to full heat, if it is available (O/W2 or Y1/W2 will  
come on—see Table 2). Reducing set point below room tempera-  
ture will turn all heat off.  
1
If system has 2 cooling stages, it will start on Cool Stage 1 and  
proceed to Cool Stage 2, 15 minutes later due to a staging timer  
which requires 15 minutes between successive stages. The IN-  
CREASE TEMPERATURE button (up and FAN buttons) cannot  
be used to defeat this timer. This timer can be defeated by reducing  
the set point to more than 5° below room temperature, bringing on  
a Cool Stage 2 demand within 5 seconds. Remember: 2 stage  
cooling units often have a 1 minute off time between lo and high,  
so the thermostat’s demand will not show immediately as a change  
in the outdoor unit. It will show immediately as an increase in the  
indoor fan speed.  
 Step 6—Final Settings  
1
2
3
. Assuming the system is to be left in operation after the  
installation is complete, use MODE button to select between  
HEAT, COOL, EHEAT, or AUTO to provide the desired  
operation of heating, cooling, or both.  
. The default set points and programmed schedule conform to  
the Energy Star requirements of the U.S. Department of  
Energy for both heating and cooling. These provide energy  
saving temperature settings.  
TO TEST HEATING:  
Press MODE button until HEAT icon under it turns on. Press up  
button until HEAT set point (LOWER right 2 digit display with  
HEAT now flashing under it) is 2° or 3° (not more) above room  
temperature. This will create a Heat Stage 1 demand. A small  
triangle to the left of this HEAT icon will flash or come on  
continually. Flashing means the equipment is going to turn on but  
is presently being held off by a system timer. (See Operational  
Information for timer descriptions.) Defeat timer by pressing  
INCREASE TEMPERATURE button (up and FAN buttons to-  
gether). This will make the triangle stay on and turn on Heat Stage  
. Turn on HOLD if fixed set points are to be used. If the  
programmed schedule is to be used, make sure the HOLD icon  
is off.  
4. For further information on temperature selection and program-  
ming, refer to Homeowner’s Manual.  
5
. If AUTO mode is to be used, be sure both heat and cool set  
points are properly adjusted.  
1
. To turn off, reduce heating set point below room temperature.  
6
. The FAN button may be used to select between AUTO (fan on  
only with equipment) and FAN (fan on continuously) fan  
modes.  
The heating and the triangle will turn off within a few seconds.  
If the system has multiple heat stages, it will start on Heat Stage 1  
and proceed to Heat Stage 2, 15 minutes later due to a staging  
timer which requires 15 minutes between successive stages. The  
INCREASE TEMPERATURE button (up and FAN buttons)  
cannot be used to defeat this timer. If set point is raised more than  
Step 7—Checklist  
1
2
3
. Put away tools and instruments, and clean up debris.  
. Review Homeowner’s Guide with owner.  
. Leave literature packet with owner.  
5
° above room temperature, the staging timer is defeated and the  
thermostat will call for higher stages within 5 sec. Use this method  
if there are only 2 stages of heat. If more than 2 stages of heat are  
available, do not use this method because once the demand  
exceeds 5°, the thermostat may jump to the highest stage. With  
more than 2 stages available, let the timer advance one stage every  
4. Fill out and return survey card.  
1
5 minutes.  
5
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6
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MODEL AC  
THERMOSTAT  
SINGLE-STAGE  
FURNACE  
SINGLE-SPEED  
AIR CONDITIONER  
2
4 VAC HOT  
R
R
G
W
Y
FAN  
G
HEAT STAGE 1 W/W1  
COOL STAGE 1 Y/Y2  
Y
N/A  
N/A  
O/W2  
Y1/W2  
24 VAC COMM  
C
C
C
N/A  
B
OUTDOOR  
SENSOR  
S1  
S2  
CONNECTION  
See note 1  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
OFF OFF OFF OFF  
A98485  
Fig. 2—Single-Speed Air Conditioner  
with Single-Stage Furnace—Model AC Thermostat  
TWO-STAGE OR  
VARIABLE-SPEED  
FURNACE  
TWO-STAGE OR  
VARIABLE-SPEED  
FURNACE  
MODEL HP  
THERMOSTAT  
SINGLE-SPEED  
MODEL AC  
THERMOSTAT  
SINGLE-SPEED  
AIR CONDITIONER  
AIR CONDITIONER  
2
4 VAC HOT  
R
R
G
2
4 VAC HOT  
R
R
G
FAN  
G
FAN  
G
HEAT STAGE 1 W/W1  
COOL STAGE 1 Y/Y2  
HEAT STAGE 2 O/W2  
W/W1  
Y/Y2  
W2  
HEAT STAGE 1 W/W1  
COOL STAGE 1 Y/Y2  
W/W1  
Y/Y2  
W2  
Y
Y
N/A  
N/A  
O/W2  
N/A  
Y1/W2  
Y1/W2  
HUM  
C
HUM  
C
2
4 VAC COMM  
C
B
C
2
4 VAC COMM  
C
B
C
N/A  
N/A  
OUTDOOR  
SENSOR  
S1  
OUTDOOR  
SENSOR  
S1  
See notes 1 and 6  
See note 2  
CONNECTION S2  
CONNECTION  
S2  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
OFF OFF ON OFF  
A98486  
A98487  
Fig. 3—Single-Speed Air Conditioner  
with 2-Stage or Variable-Speed Furnace  
Model AC Thermostat  
 Fig. 4—Single-Speed Air Conditioner  
with 2-Stage or Variable-Speed Furnace  
—Model HP Thermostat  
7
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MODEL HP  
THERMOSTAT  
TYPICAL  
FAN COIL  
SINGLE-SPEED  
AIR CONDITIONER  
MODEL AC  
TYPICAL  
SINGLE-SPEED  
THERMOSTAT  
FAN COIL  
AIR CONDITIONER  
24 VAC HOT  
FAN  
R
G
R
G
2
4 VAC HOT  
R
R
G
FAN  
G
HEAT STAGE 1 W/W1  
COOL STAGE 1 Y/Y2  
HEAT STAGE 2 O/W2  
W2  
*
COOL STAGE 1 Y/Y2  
HEAT STAGE 1 W/W1  
Y
Y
*
Y
Y
W2  
W3  
E
N/A  
N/A  
O/W2  
W3  
E
N/A  
Y1/W2  
Y1/W2  
2
4 VAC COMM  
C
B
C
C
2
4 VAC COMM  
C
B
C
C
N/A  
N/A  
OUTDOOR  
SENSOR  
OUTDOOR  
SENSOR  
S1  
S1  
S2  
See notes 2, 7, and 8  
See notes 1, 7, and 8  
CONNECTION  
S2  
CONNECTION  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
OFF OFF ON OFF  
A98488  
A98489  
Fig. 5—Single-Speed Air Conditioner  
with Typical Fan Coil—Model AC Thermostat  
Single-Stage Heat Control)  
Fig. 6—Single-Speed Air Conditioner  
with Typical Fan Coil—Model HP Thermostat  
Dual-Stage Heat Control)  
(
(
MODEL HP  
THERMOSTAT  
TYPICAL  
SINGLE-SPEED  
HEAT PUMP  
R
MODEL 2S  
SINGLE-STAGE  
FURNACE  
TWO-SPEED  
FAN COIL  
THERMOSTAT  
AIR CONDITIONER  
2
4 VAC HOT  
R
R
G
COOL STAGE 1 Y1/W2  
Y1  
FAN  
G
FAN  
G
G
W
Y
RVS COOLING O/W2  
O
Y
HEAT STAGE 1 W/W1  
COOL STAGE 2 Y/Y2  
*
COOL/HEAT Y/Y2  
STAGE 1  
Y
Y2  
R
HEAT STAGE 2  
W/W1  
W2  
W3  
E
W2  
N/A  
O/W2  
R
N/A  
Y1/W2  
2
4 VAC HOT  
R
C
2
4 VAC COMM  
C
B
C
C
24 VAC COMM  
N/A  
C
B
C
N/A  
OUTDOOR  
SENSOR  
S1  
OUTDOOR  
SENSOR  
S1  
See notes 3, 7, and 8  
CONNECTION  
S2  
S2  
CONNECTION  
See note 2  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
OFF OFF ON OFF  
A98490  
A98491  
Fig. 7—Single-Speed Heat Pump  
 Fig. 8—Two-Speed Air Conditioner  
with Single-Stage Furnace—Model 2S Thermostat  
with Typical Fan Coil—Model HP Thermostat  
8
href="
MODEL 2S  
THERMOSTAT  
TYPICAL  
FAN COIL  
TWO-SPEED  
AIR CONDITIONER  
MODEL 2S  
TWO-STAGE OR  
VARIABLE-SPEED  
FURNACE  
TWO-SPEED  
THERMOSTAT  
AIR CONDITIONER  
2
4 VAC HOT  
R
R
G
R
COOL STAGE 1 Y1/W2  
Y1 *  
Y1  
FAN  
G
FAN  
G
G
HEAT STAGE 1 W/W1  
COOL STAGE 2 Y/Y2  
HEAT STAGE 2 O/W2  
COOL STAGE 1 Y1/W2  
W2  
HEAT STAGE 1 W/W1  
COOL STAGE 2 Y/Y2  
HEAT STAGE 2 O/W2  
W/W1  
*
Y
Y2  
Y/Y2  
W2  
R
Y2  
R
W3  
E
24 VAC HOT  
R
Y1  
C
24 VAC COMM  
C
C
2
4 VAC COMM  
C
B
C
C
N/A  
B
N/A  
HUM  
OUTDOOR  
SENSOR  
S1  
OUTDOOR  
SENSOR  
S1  
S2  
CONNECTION  
CONNECTION S2  
See notes 2, 7, and 8  
See notes 2, 5, and 7  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF ON OFF  
OFF OFF ON OFF  
A98493  
A98492  
Fig. 10—Two-Speed Air Conditioner  
Fig. 9—Two-Speed Air Conditioner  
with Typical Fan Coil—Model 2S Thermostat  
with 2-Stage or Variable-Speed Furnace  
Model 2S Thermostat  
MODEL 2S  
THERMOSTAT  
TWO-STAGE OR  
VARIABLE-SPEED  
FURNACE  
TWO-SPEED  
HEAT PUMP  
MODEL 2S  
THERMOSTAT  
SINGLE-STAGE  
FURNACE  
TWO-SPEED  
HEAT PUMP  
COOL/HEAT Y1/W2  
STAGE 1  
Y1 *  
Y1  
O
COOL/HEAT Y1/W2  
STAGE 1  
Y1  
O
RVS COOLING O/W2  
O
*
RVS COOLING O/W2  
HEAT STAGE 3 W/W1  
W/W1  
W2  
Y2  
W3  
R
HEAT STAGE 3 W/W1  
W
W2  
Y2  
COOL/HEAT  
STAGE 2  
Y/Y2  
G
Y/Y2  
G
COOL/HEAT  
STAGE 2  
Y/Y2  
G
Y
G
R
FAN  
FAN  
W3  
R
24 VAC HOT  
R
R
24 VAC HOT  
R
W2  
2
4 VAC COMM  
C
B
C
C
2
4 VAC COMM  
C
B
C
C
N/A  
HUM  
N/A  
OUTDOOR  
SENSOR  
S1  
OUTDOOR  
SENSOR  
S1  
CONNECTION  
S2  
CONNECTION  
S2  
See notes 3, 6, 7, 9, and 11  
See notes 3, 9, and 11  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
OFF OFF OFF OFF  
A98494  
A98495  
Fig. 11—Two-Speed Heat Pump  
with Single-Stage Furnace  
 Fig. 12—Two-Speed Heat Pump  
with 2-Stage or Variable-Speed Furnace  
—Model 2S Thermostat  
Model 2S Thermostat  
9
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MODEL 2S  
THERMOSTAT  
SINGLE-SPEED  
HEAT PUMP  
EASY SELECT  
TERMINAL BOARD  
DH  
J1  
MODEL 2S  
THERMOSTAT  
TYPICAL  
FAN COIL  
TWO-SPEED  
HEAT PUMP  
JUMPER  
24 VAC HOT  
R
R
R
Y
2
4 VAC HOT  
R
R
G
R
FAN  
G
G
FAN  
G
COOL/HEAT Y/Y2  
STAGE 1  
Y/Y2  
W1  
W2  
O
REMOVE  
HEAT STAGE 3 W/W1  
W2  
W2  
HEAT STAGE 2 W/W1  
HEAT STAGE 3 Y1/W2  
RVS COOLING O/W2  
J2 JUMPER  
FOR HEAT  
STAGING  
W3  
E
COOL/HEAT Y/Y2  
STAGE 2  
W2  
O
Y2  
O
RVS COOLING O/W2  
Y
*
COOL/HEAT Y1/W2  
STAGE 1  
Y1  
C
Y1  
W3  
C
2
4 VAC COMM  
C
B
C
24 VAC COMM  
C
B
C
N/A  
N/A  
OUTDOOR  
SENSOR  
S1  
See notes 3, 4, and 8  
OUTDOOR  
SENSOR  
S1  
CONNECTION S2  
CONNECTION S2  
ON  
See notes 3, 7, 8, 9, and 11  
SUGGESTED DIP  
SWITCH SETTINGS  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
OFF OFF OFF ON  
A98497  
A
B
C
D
OFF OFF OFF OFF  
 Fig. 14—Single-Speed Heat Pump  
with Variable-Speed Fan Coil (FK, FV, 40FKA)  
and Special 3-Stage Electric Heat  
—Model 2S Thermostat  
A98496  
Fig. 13—Two-Speed Heat Pump  
with Typical Fan Coil—Model 2S Thermostat  
MODEL AC  
THERMOSTAT  
SINGLE-SPEED  
AIR CONDITIONER  
MODEL HP  
THERMOSTAT  
SINGLE-SPEED  
AIR CONDITIONER  
EASY SELECT  
TERMINAL BOARD  
EASY SELECT  
TERMINAL BOARD  
DH  
DH  
J1  
J1 JUMPER  
JUMPER  
24 VAC HOT  
R
R
24 VAC HOT  
FAN  
R
R
HEAT STAGE 1 W/W1  
W1  
W2  
G
G
G
J2 JUMPER  
REMOVE  
N/A  
FAN  
N/A  
O/W2  
G
HEAT STAGE 1 W/W1  
HEAT STAGE 2 O/W2  
COOL STAGE 1 Y/Y2  
W1  
W2  
Y/Y2  
Y1  
J2 JUMPER  
FOR HEAT  
STAGING  
Y1/W2  
Y1  
Y
C
COOL STAGE 1 Y/Y2  
Y/Y2  
Y
C
N/A  
Y1/W2  
O
C
O
C
2
4 VAC COMM  
C
B
24 VAC COMM  
N/A  
C
B
N/A  
OUTDOOR  
SENSOR  
S1  
OUTDOOR  
SENSOR  
S1  
See notes 1 and 8  
See notes 2 and 8  
CONNECTION S2  
CONNECTION S2  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
OFF OFF ON OFF  
A98498  
A98499  
Fig. 15—Single-Speed Air Conditioner  
with Variable-Speed Fan Coil  
 Fig. 16—Single-Speed Air Conditioner  
with Variable-Speed Fan Coil  
(FK, FV, 40FKA)—Model HP Thermostat  
(FK, FV, 40FKA)—Model AC Thermostat  
1
0
href="
MODEL 2S  
THERMOSTAT  
TWO-SPEED  
HEAT PUMP  
EASY SELECT  
MODEL 2S  
THERMOSTAT  
TWO-SPEED  
AIR CONDITIONER  
TERMINAL BLOCK  
EASY SELECT  
TERMINAL BOARD  
DH  
DH  
J1  
J1 JUMPER  
2
4 VAC HOT  
R
R
G
R
JUMPER  
24 VAC HOT  
R
R
R
FAN  
G
FAN  
G
G
COOL/HEAT Y1/W2  
STAGE 1  
Y1  
O
Y1  
O
COOL STAGE 1 Y1/W2  
COOL STAGE 2 Y/Y2  
HEAT STAGE 1 W/W1  
HEAT STAGE 2 O/W2  
Y1  
Y1  
Y2  
RVS COOLING� O/W2  
Y/Y2  
COOL/HEAT Y/Y2  
STAGE 2  
Y/Y2  
W1  
W2  
Y2  
REMOVE  
W1  
W2  
J2 JUMPER  
FOR HEAT  
STAGING  
HEAT STAGE 3 W/W1  
W2  
W3  
C
J2 JUMPER  
O
C
2
4 VAC COMM  
C
B
C
2
4 VAC COMM  
C
B
C
N/A  
N/A  
OUTDOOR  
SENSOR  
S1  
S2  
OUTDOOR  
SENSOR  
S1  
See notes 3, 8, 9, and 11  
CONNECTION  
See notes 2 and 8  
CONNECTION S2  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
A98501  
OFF OFF ON OFF  
A98500  
Fig. 18—Two-Speed Heat Pump  
with Variable-Speed Fan Coil  
Fig. 17—Two-Speed Air Conditioner  
with Variable-Speed Fan Coil  
FK, FV, 40FKA)—Model 2S Thermostat  
(FK, FV, 40FKA)—Model 2S Thermostat  
(
MODEL AC  
THERMOSTAT  
SPLICE  
BOX  
HEATER  
CONTROL BOX  
MODEL AC  
THERMOSTAT  
SPLICE  
BOX  
N/A  
Y1/W2  
RED  
GRN  
WHT  
YEL  
2
4 VAC HOT  
R
GRN  
WHT  
YEL  
FAN  
G
FAN  
G
HEAT STAGE 1 W/W1  
COOL STAGE 1 Y/Y2  
WHT  
HEAT STAGE 1 W/W1  
COOL STAGE 1 Y/Y2  
N/A  
O/W2  
R
N/A  
N/A  
O/W2  
RED  
BRN  
2
4 VAC HOT  
Y1/W2  
2
4 VAC COMM  
C
B
BRN  
BRN  
2
4 VAC COMM  
C
B
N/A  
N/A  
OUTDOOR  
SENSOR  
S1  
S2  
OUTDOOR  
SENSOR  
S1  
S2  
See notes 1, 11, and 12  
See notes 1 and 11  
CONNECTION  
CONNECTION  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
A98502  
A98503  
Fig. 19—Single-Speed Packaged Air Conditioner  
with Single-Stage Gas Furnace (48SS, SX)  
 Fig. 20—Single-Speed Packaged Air Conditioner  
with Single-Stage Electric Heat (50SS, SX, ZP)  
1
1
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MODEL HP  
THERMOSTAT  
SPLICE  
BOX  
HEATER  
CONTROL BOX  
MODEL HP  
THERMOSTAT  
SPLICE  
BOX  
HEATER  
CONTROL BOX  
YEL  
COOL STAGE 1 Y/Y2  
COOL/HEAT  
YEL  
Y/Y2  
STAGE 1  
GRN  
FAN  
HEAT STAGE 1 W/W1  
N/A  
Y1/W2  
HEAT STAGE 2 O/W2  
G
ORN  
RVS COOLING O/W2  
WHT  
WHT  
N/A  
HEAT STAGE 2 W/W1  
Y1/W2  
RED(TRAN)  
PNK  
VIO  
WHT  
GRN  
RED  
WHT  
FAN  
G
R
RED  
BRN  
24 VAC HOT  
R
RED  
BRN  
24 VAC HOT  
2
4 VAC COMM  
C
B
BRN  
24 VAC COMM  
C
B
BRN  
N/A  
N/A  
OUTDOOR  
SENSOR  
S1  
S2  
See notes 2, 10, 11, and 12  
OUTDOOR  
SENSOR  
S1  
S2  
See notes 3, 11, and 12  
CONNECTION  
CONNECTION  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF ON OFF  
A98504  
OFF OFF OFF OFF  
A98505  
Fig. 21—Single-Speed Packaged Air Conditioner  
with 2-Stage Electric Heat (50SS, SX, ZP)  
Fig. 22—Single-Speed Packaged Heat Pump  
with Single-Stage Electric Heat (50HS, HX, ZH)  
MODEL HP  
THERMOSTAT  
SPLICE  
BOX  
HEATER  
CONTROL BOX  
MODEL HP  
THERMOSTAT  
SPLICE  
BOX  
VIO  
HEAT STAGE 2 W/W1  
RVS COOLING O/W2  
COOL/HEAT  
YEL  
Y/Y2  
STAGE 1  
ORN  
ORN  
RVS COOLING O/W2  
WHT  
YEL  
N/A  
Y1/W2  
WHT  
RED  
N/A  
Y1/W2  
COOL/HEAT  
STAGE 1  
Y/Y2  
G
HEAT STAGE 2  
WHT  
GRN  
RED  
W/W1  
GRN  
RED  
FAN  
FAN  
G
R
2
4 VAC HOT  
R
2
4 VAC HOT  
BRN  
2
4 VAC COMM  
C
B
BRN  
PNK  
BRN  
2
4 VAC COMM  
C
B
RED(TRAN)  
N/A  
N/A  
OUTDOOR  
SENSOR  
S1  
S2  
OUTDOOR  
SENSOR  
S1  
S2  
See notes 3, 10, 11, and 12  
CONNECTION  
See notes 3, 11, and 12  
CONNECTION  
ON  
ON  
SUGGESTED DIP  
SWITCH SETTINGS  
SUGGESTED DIP  
SWITCH SETTINGS  
A
B
C
D
A
B
C
D
OFF OFF OFF OFF  
OFF OFF OFF OFF  
A98506  
A98507  
Fig. 23—Single-Speed Packaged Heat Pump  
with 2-Stage Electric Heat (50HS, HX, ZH)  
 Fig. 24—Single-Speed Packaged Heat Pump  
with Single-Stage Gas Furnace (48HX)  
1
2
WIRING DIAGRAM NOTES  
1
2
3
4
. The AC model thermostat can only control 1-stage cool and 1-stage heat. Dip Switch-C on has no controlling function and can either be  
ON or OFF.  
. HP and 2S model thermostat MUST have Dip Switch-C ON when installed in air conditioner applications. If required, second-stage heat  
is controlled by O/W2. Refer to indoor equipment Installation Instructions for proper setup.  
. HP and 2S model thermostat MUST have Dip Switch-C OFF when installed in heat pump applications. The reversing valve is controlled  
by O/W2.  
. Intelligent Heat Staging Option: 2S model thermostat with Dip Switch-C OFF and Switch-D ON. This provides single-stage heat pump  
operation Y/Y2, with three-stage auxiliary heat via W/W1 and Y1/W2. Refer to variable-speed fan coil Installation Instructions. Proper  
’intelligent heat capable’ electric heater package must be used.  
5
6
. As an option, lock the furnace into low-fire operation and let O/W2 control high-fire operation. Refer to indoor equipment Installation  
Instructions for proper setup.  
. Furnace must control its own second-stage heat operation via furnace control algorithm. Refer to indoor equipment Installation Instructions  
for proper setup.  
7
8
9
. Terminals marked with * may not be present on equipment.  
. Refer to fan coil Installation Instructions for proper wiring.  
. Select the "ZONE" position on the 2-speed heat pump control board.  
1
1
1
0. Omit red and pink wires from diagram with wiring a 50ZP, ZH with 2-stage heaters.  
1. Refer to outdoor equipment Installation Instructions for proper setup.  
2. Program thermostat to bring on G (fan) with any W (heat) selection. See section under "set thermostat configuration."  
1
3
href="
OPERATIONAL INFORMATION  
Five-minute Compressor Timeguard  
This timer prevents the compressor from starting unless it has been off for at least 5 minutes. It can be defeated for 1 cycle by simultaneously  
pressing the FAN mode button and the INCREASE TEMPERATURE button.  
Fifteen-minute Cycle Timer  
This timer prevents the start of a heating or cooling cycle until at least 15 minutes after the last start of the same cycle. Its function is to assure  
that equipment is not cycled more than 4 times per hour. This timer is defeated for 1 cycle when the desired temperature is manually changed.  
It can also be defeated for 1 cycle by simultaneously pressing the FAN mode button and the INCREASE TEMPERATURE button.  
Fifteen-minute Staging Timer  
In multistage heating or cooling, this timer prevents any higher stage from turning on until the preceding stage has been on for 15 minutes.  
This timer is defeated if the temperature error is greater than 5˚F (usually due to a large change in desired temperature).  
Three-minute Minimum On Time  
In normal operation, when a stage turns on, it will not turn off for a minimum of 3 minutes.  
Heat/Cool Set Points (Desired Temperatures)  
A minimum difference of 2 degrees is enforced between heating and cooling set points. This is done by allowing one setting to "push" the other,  
to maintain this difference.  
Auto Changeover  
When the auto changeover mode is selected, a change from heat to cool (or vice versa) will not occur until an opposite mode demand has existed  
for 20 minutes. If the setpoint is changed, the 20 minute requirement is deleted.  
Emergency Heat Mode  
When thermostat is configured as a heat pump and emergency heat mode is selected, all Y signals are locked out and W becomes energized  
upon a call for heat.  
Power On Check  
When AC power is first applied, all segments of the display are turned on for a few seconds. Following this, the temperature display indicates  
the model/configuration via the following 2 digit code:  
AC—1-speed air conditioner, HP—1-speed heat pump, A2—2-speed air conditioner, H2—2-speed heat pump, HS—1-speed heat pump with  
Intelligent Heat staging (3-stage auxiliary heat).  
Error Codes  
-- — If the thermostat cannot properly read room temperature, the display will indicate "--" (2 dashes) and all outputs (except the fan if on)  
will turn off. This is to prevent operation of the equipment if the thermostat has failed.  
E2 — If the AC line voltage drops below a minimum (brownout) level, all outputs are turned off and the display indicates E2. This condition  
will remain for 15 seconds after proper line voltage is restored. If the AC line voltage disappears completely, the display will  
immediately go blank.  
E3 — If thermostat cannot properly read outdoor temperature, and/or it is needed for proper operation, (i.e. Option 8 is ON with no sensor  
attached), E3 will alternate with room temperature on the room temperature display and the outdoor temperature will read "--".  
Outdoor Temperature  
When an outdoor temperature sensor is attached, outdoor temperature can be read by pressing up and down buttons together. While it is  
displayed, the letters "od" also appear in the heat set point display.  
Smart Recovery  
With Smart Recovery selected, the transition out of a heating setback begins 90 minutes early, gradually adjusting room temperature so that  
the desired temperature will be achieved at the selected time.  
Thermostat Troubleshooting  
SYMPTOM  
WHAT TO CHECK  
Temperature sensor reading out of range. Check sensor for damage. If recycyling power  
does not clear display, thermostat should be replaced.  
"--" on temperature display  
Brownout condition or too low of voltage to thermostat. Double check wiring and check for  
"
E2" on temperature display  
E3" on temperature display  
24 VAC between R and C. E2 will clear 15 seconds after proper voltage is restored.  
Outdoor temperature reading out of range and needed for Option 8. Check outdoor tem-  
perature sensor and its wiring.  
"
After the selected number of hours of blower operation "clean filter" will display on LCD.  
This is to remind the homeowner to "check" filter. Press "reset filter" button to clear dis-  
play and reset timer to 0.  
"Clean Filter" on temperature display  
Select COOL mode. Decrease cooling setpoint to 10 degrees below room temperature.  
Simultaneously press FAN and INCREASE TEMPERATURE buttons to defeat timers.  
Check for 24 VAC at Y/Y2 terminal. If present, thermostat is OK and problem is with  
equipment or wiring. If not present, replace thermostat.  
Cooling will not come on  
Select HEAT mode. Increase heating setpoint to 10 degrees above room temperature.  
Simultaneously press FAN and INCREASE TEMPERATURE buttons to defeat timers.  
Check for 24 VAC at Y/Y2 (with HP) or W/W1 (with AC) terminal. If present, thermostat is  
OK and problem is with equipment or wiring. If not present, replace thermostat.  
Heating will not come on  
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4
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PROGRAMMABLE THERMOSTAT CONFIGURATION RECORD  
Date  
Owner/Operator  
Thermostat Model No.  
A) Hardware Configuration  
Switch A�  
Switch B�  
Switch C�  
Switch D�  
Zoning Selection. (OFF = Disable, ON = Enable)  
Smart Recovery. (OFF = Enable, ON = Disable)  
Heat Pump Operation. (OFF = Enable, ON = Disable)  
Intelligent Heat Staging. (OFF = Disable, ON = Enable)  
B) Mode Settings  
Hold (On or Off)  
Mode (Off, Heat, Cool, Auto, Eheat)  
Heating Set Point Value  
Cooling Set Point Value  
Fan (Auto or On)  
C) Configuration Options  
1
2
3
4
5
8
9
1
1
1
���  
���  
���  
���  
-7���  
Anticipator (1-9: factory default = 3)  
Clean Filter Timer (Off or 1-9: factory default = 2)  
Fahrenheit or Celsius (F or C: factory default = F)  
Fan On with W (Off or On: factory default = Off)  
N/A  
Auxiliary Heat Lockout (Off or 5-55°F: factory default = Off)  
N/A  
Room Temperature Offset (-5 to +5: factory default = 0)  
N/A  
Enable Auto Mode (Off or On: factory default = On)��  
-12��  
3���  
4���  
5���  
D) Schedule  
WAKE  
DAY  
EVE  
SLEEP  
TIME HEAT COOL TIME HEAT COOL TIME HEAT COOL TIME HEAT COOL  
Mon  
Tue  
Wed  
Thu  
Fri  
Sat  
Sun  
A98508  
1
5
SERVICE TRAINING  
Packaged Service Training programs are an excellent way to increase your  
knowledge of the equipment discussed in this manual, including:�  
��  
• Unit Familiarization��  
• Installation Overview�  
• Maintenance�  
• Operating Sequence�  
A large selection of product, theory, and skills programs is available, using popular  
video-based formats and materials. All include video and/or slides, plus companion  
book.�  
Classroom Service Training plus "hands-on" the products in our labs can mean  
increased confidence that really pays dividends in faster troubleshooting, fewer  
callbacks. Course descriptions and schedules are in our catalog.�  
CALL FOR FREE CATALOG 1-800-962-9212�  
[
] Packaged Service Training�  
[ ] Classroom Service Training  
A94328  
1
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