Trane TCONT802AS32DA Touch Screen Thermostat INSTALLATION INSTRUCTIONS

Trane TCONT802AS32DA Touch Screen Thermostat

APPLICATION

The TCONT802AS32DA and TCONT803AS32DA Touch Screen Comfort Controls provide electronic control of 24 Vac heating and cooling systems. See Table 1 for a general description.

Table 1. TCONT802AS32DA and TCONT803AS32DA Comfort Control Description.

Power Method	Changeover	System Selection	Fan Selection	Comments
24 Vac common wire	Automatic or manual selectable	Heat-Off-Cool- Auto (Em. Heat for heat pumps)	On-Auto-Circ	System and Fan selection vary based on system type
				System and Fan selection vary based on System type. Humidity sensor to control dehumidification.

MERCURY NOTICE
If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Dispose of properly.
Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old control.

INSTALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.
2. Installer must be a trained, experienced service technician.
3. After completing installation, use these instructions to check out the product operation.

Selecting Location
Install the comfort control about 5 ft. (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 1.

TCONT802AS32DA TOUCH SCREEN AND TCONT803AS32DA TOUCH SCREEN WITH DEHUMIDIFICATION

Do not install the comfort control where it can be affected by:

• Drafts or dead spots behind doors and in corners.
• Hot or cold air from ducts.
• Radiant heat from sun or appliances.
• Concealed pipes and chimneys.
• Unheated (uncooled) areas such as an outside wall behind the comfort control.

Installing Wallplate

CAUTION
Electrical Hazard.
Can cause electrical shock or equipment damage.
Disconnect power before wiring.

The comfort control can be mounted horizontally on the wall or on a 4 in. x 2 in. (101.6 mm x 50.8 mm) wiring box.

1. Position and level the wallplate (for appearance only).
2. Use a pencil to mark the mounting holes.
3. Remove the wallplate from the wall and, if drywall,drill two 3/16-in. holes in the wall, as marked. For firmer material such as plaster, drill two 7/32-in. holes. Gently tap anchors (provided) into the drilled holes until flush with the wall.
4. Position the wallplate over the holes, pulling wires through the wiring opening. See Fig. 2.
5. Insert mounting screws into the holes and tighten.

WIRING (FIG. 5-15)

All wiring must comply with local electrical codes and ordinances.

1. Select set of terminal identifications (Table 2) that corresponds with system type (heat/cool or heat pump in Fig. 3).
2. Loosen the screws for the appropriate system type selected; see Table 2. Insert wires in the terminal block under the loosened screw. See Fig. 4.
3. Securely tighten each screw.
4. Push excess wire back into the hole.
5. Plug the hole with nonflammable insulation to prevent drafts from affecting the comfort control.

Fig. 3. Selecting terminal identifications for system type.

Table 2. Selecting Terminal Identifications for System Type.

System Type	Wallplate Terminal Identifications	Wiring Diagram Reference
Standard Heat/Cool	Heat/Cool	Fig. 5, Fig. 6
Standard Multistage up to 2 Heat/2 Cool	Heat/Cool	Fig. 7, Fig. 8
Heat Pump with Electric Auxiliary (Backup) Heat	Heat Pump	Fig. 9, Fig. 10, Fig. 11
Heat Pump with Fossil Fuel Auxiliary (Dual Fuel) Heat	Heat Pump	Fig. 12, Fig. 13, Fig. 14, Fig. 15

NOTE: The factory default setting is configured for a 1 Heat/1 Cool System with a gas furnace.

IMPORTANT
Use 18 gauge comfort control wire.

Fig. 5. Typical hookup of single-stage heat and cool system with single transformer (1H/1C).

FACTORY-INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 6. Typical hookup of single-stage heat and cool system with two transformers (1H/1C).

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 7. Typical hookup of two-stage indoor and two-stage cooling unit in a single transformer system (2H/2C or 2H/1C or 1H/2C).

FACTORY-INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

THE INSTALLER MUST JUMPER AT THE LVTB “R” TO “O”.

Fig. 9. Typical hookup of single-stage heat pump with auxiliary/backup heat (2H/1C heat pump).

FACTORY-INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 10. Typical hookup of multistage heat pump with auxiliary/backup heat (3H/2C heat pump).

FACTORY-INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 11. Typical hookup of multistage two-step scroll heat pump with auxiliary/backup heat (3H/2C heat pump).

FACTORY-INSTALLED JUMPER.

OUTDOOR REMOTE SENSOR. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

THE INSTALLER MUST JUMPER AT THE LVTB “R” TO “O”.

Fig. 12. Typical hookup of singe-stage heat pump with non-variable speed gas furnace.

FACTORY-INSTALLED JUMPER.

OUTDOOR REMOTE SENSOR. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 13. Typical hookup of single-stage heat pump with two stage variable speed gas furnace (2H/1C heat pump).

FACTORY-INSTALLED JUMPER.

OUTDOOR REMOTE SENSOR. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 14. Typical hookup of multistage heat pump with two stage variable speed gas furnace (3H/2C heat pump).

FACTORY-INSTALLED JUMPER.

OUTDOOR REMOTE SENSOR. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 15. Typical hookup of multistage two-step scroll heat pump with two stage variable speed gas furnace (3H/2C heat pump).

FACTORY INSTALLED JUMPER.

OUTDOOR REMOTE SENSOR. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

REMOVE / CUT JUMPER FROM R TO BK.

Powering the Comfort Control
The Comfort Control can be powered with 24 Vac.

24 Vac Common Power (Recommended)
Wire the common side of the transformer to the B screw of the comfort control wallplate. When installing in a single transformer system, keep the jumper wire between the R and Rc screws. When installing in a two-transformer system, use the common from the cooling transformer to connect to the B screw and remove the jumper wire between the R and Rc screws.

Battery Power (Optional)

CAUTION
Equipment or Property Damage Hazard.
Using battery power only may not provide adequate power to comfort control and can cause damage during freezing conditions.
Connect the 24 Vac Common (B) wire from the system transformer to the comfort control for proper operation when the battery power is drained.

Three AAA alkaline batteries can be used to power the comfort control for armchair programming only. To prevent the comfort control and heating/cooling system from shutting down due to lack of battery power, it is not recommended that the comfort control be solely powered with the three AAA batteries during normal system operation. When using batteries, make sure positive and negative terminals are oriented correctly, as marked on the device. See Fig. 16.

Fig. 16. Installing batteries on comfort control back.

Mounting the Comfort Control

1. Align the terminal screw blocks with the pins on the back of the comfort control.
2. Push the comfort control straight onto the wallplate.
   See Fig. 17.

Fig. 17. Mounting comfort control on wallplate.

Adjusting Real-Time Clock

Setting Calendar and Time
Locate and remove the tab labeled Remove in the lower left corner on the comfort control back. The tab must be removed to activate the real-time clock. See Fig. 18.

Fig. 18. Removing tab to activate real-time clock.

This comfort control is designed to automatically keep the current time and day in memory for up to ten years under normal use once the calendar is set. When the comfort control is first powered, the display is ready for the calendar date to be entered. See Fig. 19.

Fig. 19. Setting calendar and time after initial powerup.

IMPORTANT
The tab on the back of the comfort control in the lower left corner must be removed for this feature to be active.

Using the Comfort Control

The comfort control has a touch screen interface. Words or symbols appear, highlighting the keys, as necessary, to complete tasks. Always press the keys with your fingertips. Sharp instruments like a pen or pencil point can damage the comfort control.

1. Use the arrow keys to set the Year, Month and Day, as shown in Fig. 19.
2. Press the Done key.
3. Use the arrow keys to set the current time. See Fig. 19.
4. Press the Done key.

OPERATION

System and Fan Settings
The System default setting is Heat and the Fan default setting is Auto.

SYSTEM SETTINGS

• Heat: controls heating system.
• Off: heating and cooling are off.
• Cool: controls cooling system.
• Auto: automatically changes between heating and cooling systems, depending on indoor temperature. (See Installer Setup section.)
• Em Heat: emergency heat cycles to maintain temperature. Compressor is locked out. (Used only for heat pump systems with backup heat.)

FAN SETTINGS
The Fan setting can be programmed into the comfort control schedule for each period (Wake, Leave, Return,Sleep). See the Owners’ Guide for additional information.
LED Indication (Requires 24 Vac Common Connection)

An LED indicator is located in the upper right corner of the comfort control. It is only visible when lighted:

• It indicates when the comfort control is in the Emergency Heat mode. When in Em. Ht. mode, the F terminal is continuously energized and the LED is on.
• When the F terminal is wired to an equipment monitor,the LED signals when a check or fail signal is sent to the comfort control from the system. See Fig. 20. (This can occur only when the comfort control is not in Em.
  Ht. mode.)

Fig. 20. F terminal switch to R (power) side of system transformer.

Preprogrammed Settings

Table 3 shows the default program settings. See Owners Guide for complete instructions on changing the program.

Table 3. Default Program Settings.

Schedule Period	Time	Setpoints		Fan Setting
		Heat	Cool
Wake	6:00AM	70°F (21°C)	78°F (25.5°C)	Auto
Leave	8:00AM	62°F (16.5°C)	85°F (29.5°C)	Auto
Return	6:00PM	70°F (21°C)	78°F (25.5°C)	Auto
Sleep	10:00PM	62°F (16.5°C)	82°F (28°C)	Auto

INSTALLER SETUP

The comfort control works with many different system types. To operate correctly, the comfort control must be set up to operate the installed heating and/or cooling system.

Follow these steps to enter the Installer Setup:

1. Be sure the comfort control is powered.
2. Press and release the System Key.
3. Press and hold the two blank keys on either side of the center blank key for approximately five seconds until screen changes.
4. Release the two blank keys when the screen on the comfort control matches the screen below.
5. See screen below to review how the comfort control keys are used during Installer Setup. See Table 4 for the Installer Setup Numbers and Settings.
6. Press the Done key to exit the Installer Setup screen.

IMPORTANT
The Installer Setup Menu (Table 4) shows all the available options. These options customize themselves as you make selections to the Installer Setup. Therefore, not all Installer Setup Selections are shown or are avail- able to change.

Table 4. Installer Setup Menu.

Select	Installer Setup Number	Factory Setting		Other Choices		Comments
		Option	Description	Options	Description
Not used.	1 thru 0099	–	–	–	–	–
Date (Year Upper)	0120	20	Set first two digits of current calendar year (20 for year 2005, etc)	21	21 -first two digits of current calendar year (21xx)	2000 – 2178 available
Date (Year Lower)	0130	05	Represents last two digits of current calendar year (2005).	00 -99	Select last two digits of current calendar year.	2000 – 2178 available
Date (Month)	0140	6	Digit(s) represents current calendar month.	1-12	Select number that represents current calendar month.	–
Date (Day)	0150	15	Digit(s) represents current calendar date.	1-31	Select number that represents current calendar date.	–
Schedule Options	0160	4	7-day programming	0	0-nonprogrammable	–
System Type Selection	0170	1	1 Heat/1Cool	1-12	1-1heat/1cool 2-single-stage heat pump (no	Available options and defaults vary by
					aux. heat)	comfort control.
					3-heat only (no fan)	System selection
					4-heat only (with fan)	automatically
					5-hot water Series 20 (3-wire	modifies some
					or normally open zone valves)	default settings and/
					6-cool only	or hides other
					7-2 heat/1cool heat pump	Installer Setup
					8-2 heat/2 cool	options.
					9-2 heat/1cool
					10-1 heat/2 cool oil furnace
					or 0H/2C
					11-2 heat/2 cool heat pump
					(with no auxiliary heat)
					12-3 heat/2 cool heat pump
					(with auxiliary heat)
Fan Operation	0180	0	Heat/Cool	1	Heat pump or electric heat	Only shown if heat/
			applications where		applications where comfort	cool system is
			equipment controls		control controls fan operation	selected. If heat
			fan operation in heat mode.		in heat mode.	pump is chosen, fan defaults to electric.
Backup Heat	0200	0	Heat pump backup	1	Heat pump backup heat	Only shown if 2 heat/
Source			heat source is electric.		source is fossil fuel.	1 cool or 3 heat/2
(Auxiliary						cool heat pump is
Heat)						chosen.
External Fossil Fuel Kit	0210	1	External fossil fuel kit is controlling heat pump backup heat (recommended)	0	No external fossil fuel kit is controlling heat pump backup heat. This comfort control controls the backup fossil fuel heat with outdoor sensor.	Only shown if fossil fuel is chosen as backup heat source.
Cycles per	0220	3	Compressor Stage 1	1-6	1-6 available;	–
hour (cph) for			cycles per hour (cph)		3 is recommended.
1st Stage
Compressor
Cycles per	0230	3	Compressor Stage 2	1-6	1-6 available;	Only shown if two
hour (cph) for			cycles per hour (cph)		3 is recommended.	stages of cool are
2nd Stage Compressor						selected.

Select	Installer Setup Number	Factory Setting		Other Choices		Comments
		Option	Description	Options	Description
Cycles per	0240	5	Heat Stage 1 cycles	1-12	1-12 available; typical settings:	Not shown if system
hour (cph) for			per hour (cph)		1-1 cph used for steam or	selection is heat
1st Stage					gravity system.	pump. Selection in
Heat					3-3 cph used for 2-stage	this stage changes
					fossil fuel forced air systems or	default cph for 2nd
					hot water systems.	stage heat.
					5-5 cph used for single-stage
					fossil fuel forced air systems.
					9-9 cph used for electric
					forced air heat systems
					(electric auxiliary heat for heat
					pump systems).
Cycles per	0250	5	Cycles per hour (cph)	1-12	1-12 available; typical settings:	Only shown if two
hour (cph) for			for 2nd Stage Heat or		1-1 cph used for steam or	stages of heat are
2nd Stage			Auxiliary Heat for		gravity system.	selected.
Heat			2 H/1C Heat Pump Systems		3-3 cph used for 2-stage fossil fuel forced air systems or
					hot water systems.
					5-5 cph used for single-stage
					fossil fuel forced air systems.
					9-9 cph used for electric
					forced air heat systems
					(electric auxiliary heat for heat
					pump systems).
Cycles per	0260	9	Cycles per hour (cph)	1-12	1-12 available; typical settings:	Only shown if 3H/2C
hour (cph) for			for Auxiliary Heat in		1-1cph used for steam or	heat pump system is
3rd Stage			3H/2C Heat Pump		gravity system.	selected.
Heat			Systems		3-3 cph used for 2-stage
					fossil fuel forced air systems or
					hot water systems.
					5-5 cph used for single-stage
					fossil fuel forced air systems.
					9-9 cph used for electric
					forced air heat systems
					(electric auxiliary heat for heat
					pump systems).
Cycles per hour (cph) for Em Heat	0270	9	Cycles per hour (cph) for Emergency Heat	1-12	1-12 is available; typical settings: 3-3 cph used for 2-stage	Only shown if 2 heat/ 1 cool or 3 heat/2 cool heat pump is
					fossil fuel forced air systems or	selected.
					hot water systems.
					5-5 cph used for single-stage
					fossil fuel forced air systems.
					9-9 cph used for electric
					forced air heat systems
					(electric auxiliary heat for heat
					pump systems).
Continuous Backlight	0280	0	Backlight not on continuously. Comfort	1	Backlight is on continuously (comfort control must have a	Option is always shown; however,
			control backlight		common wire attached for this	continuously on
			comes on with each key press.		function).	backlight works only if comfort control is
						wired with 24 Vac
						Common.
Changeover	0300	0	Manual changeover	1	1-auto changeover	–

Select	Installer Setup Number	Factory Setting		Other Choices		Comments
		Option	Description	Options	Description
Deadband	0310	2 thru 9	Heating and cooling	3	Heating and cooling setpoints	Shown only if
			setpoints can be set		can be set no closer than 3°F	automatic
			no closer than chosen		(1.5°C).	changeover is
			value:			selected.
			2-2°F (1°C)			The deadband is
			3-3°F (2°C)			restricted to the range
			4-4°F (2.5°C)			of 5 to 9 if ISU 0380 is
			5-5°F (3°C)			set to
			6-6°F (3.5°C)			dehumidification
			7-7°F (4°C)			droop control.
			8-8°F (4.5°C)
			9-9°F (5°C)
Temperature Indication Scale	0320	0	Temperature is displayed in °F.	1	Temperature is displayed in °C.	–
Daylight Savings	0330	1	Daylight savings enabled (use through	0, 2	0-daylight savings is disabled.	Set to 0 in areas that do not follow daylight
			2006 and for areas		2-daylight savings is enabled	savings.
			that do not use the		(start using in 2007, for areas
			new 2007 DST		that use the new 2007 DST
			calendar).		calendar).
Remote	0340	0	No remote	1-3	1-outdoor temperature	Defaults and Options
Temperature			temperature sensor		sensor for display only.	depend on System
Sensor					2-outdoor temperature	Type selection.
(Outdoor or					sensor for system control,	Indoor Temperature
Indoor)					used for select heat pump	Sensor uses an
					systems. (See Special Heat	averaging network
					Pump Features section for	and does not include
					more details.) 3-indoor temperature sensor	on-board sensor.
Heat Pump	0350	0	No compressor	15, 20,	15°F (-9.5°C)	Default depends on
Compressor Lockout			lockout.	25, 30, 35, 40,	20°F (-6.5°C) 25°F (-4°C)	other selections. Shown if Outdoor
				45	30°F (-1°C)	Temperature for
					35°F (1.5°C)	control is selected.
					40°F (4.5°C)
					45°F (7°C)
Heat Pump	0360	0	No heat pump	40, 45,	40°F (4.5°C)	Shown if electric is
Auxiliary Lockout			auxiliary lockout.	50, 55, 60	45°F (7°C) 50°F (10°C)	chosen for backup heat source and
					55°F (13°C)	outdoor temperature
					60°F (15.5°C	sensor for control is
						selected.
Indoor Dehumidifica- tion Control	0380	0	No indoor dehumidification control.	1	1-dehumidification droop control.	Available on models with humidity sensor.
Furnace Filter Change Reminder	0500	0	Furnace filter change reminder off.	1-6	1-10 run time days 2-30 run time days 3-60 run time days	Run time based on call for fan.
					4-90 run time days
					5-120 run time days
					6-365 run time days
Humidifier	0510	0	Humidifier pad	1-3	1-90 calendar days	–
Pad			replacement reminder		2-180 calendar days
Replacement Reminder			off.		3-365 calendar days

Select	Installer Setup Number	Factory Setting		Other Choices		Comments
		Option	Description	Options	Description
Adaptive Intelligent Recovery™	0530	1	Adaptive Intelligent Recovery™ control is activated (system starts early so setpoint is reached by start of program period).	0	0-conventional recovery (system starts recovery at programmed time)	–
Number of Periods	0540	4	Four periods available (Wake, Leave, Return, Sleep)	2	Two periods available (Wake and Sleep)	Not shown if non-programmable is selected. 2 or 4 applies to all days of the week.
Minimum Compressor Off Time	0580	5	Five minute minimum off time for compressor.	0, 2, 3, 4	Minimum number of minutes compressor is off between calls for compressor.	Five minutes recommended
Heat Temperature Range Stop	0600	90	Highest heating setpoint.	40 to 89	Temperature range (1°F increments) of heating setpoint.	Shown in 1/2 °C.
Cool Temperature Range Stop	0610	50	Lowest cooling setpoint.	51 to 99	Temperature range (1°F increments) of cooling setpoint.	Shown in 1/2 °C.
Clock Format	0640	12	12-hour clock format	24	24-hour clock format	–
Extended Fan on time Heat	0650	0	No extended fan operation after call for heat ends.	90	Fan operation is extended 90 seconds after call for heat ends.	Not shown if fan operation is set to fossil fuel or in Cool Only Systems
Extended Fan on time Cool	0660	0	No extended fan operation after call for cool ends.	90	Fan operation is extended 90 seconds after call for cool ends.	Not shown in Heat Only Systems.
Keypad Lockout	0670	0	Unlocked keypad	1, 2	1-   partially locked keypad 2-   fully locked keypad	Unlocked-all functions are available. Partially locked-only temperature up and down keys and ability to enter and modify Installer Setup mode are available. Fully locked-only ability to enter and modify Installer Setup mode are available.

Select	Installer Setup Number	Factory Setting		Other Choices		Comments
		Option	Description	Options	Description
Temperature Control in Heat	0680	2	Standard temperature control in heating.	1, 3	1-less aggressive temperature control (could cause temperature undershoot) 3-more aggressive temperature control (could cause temperature overshoot)	Applies to recovery ramp and use of auxiliary heat during recovery. Choose 1 if getting temperature overshoot. Choose 3 if getting temperature undershoot.
Temperature Control in Cool	0690	2	Standard temperature control in cooling.	1, 3	1-less aggressive temperature control (could cause temperature undershoot) 3-more aggressive temperature control (could cause temperature overshoot)	Applies to recovery ramp. Choose 1 if getting temperature overshoot. Choose 3 if getting temperature undershoot.
Temperature Display Offset	0700	0	No difference in displayed temperature and actual room temperature.	-3, -2, -1, 0, 1, 2, 3	-3°F (-1.5°C) -2°F (-1°C) -1°F (-0.5°C) 0°F (0°C) 1°F (0.5°C) 2°F (1°C) 3°F (1.5°C)	–
Reset Comfort Control	0710	0	No comfort control reset.	1	Resets all Installer Setup Options to default values and resets schedule to default setting.	Only calendar settings and time are retained.

SYSTEM CHECKOUT

Installer System Test
The Installer System Test mode is used to test the HVAC system(s). See Table 5. While in System Test mode, minimum off-time for compressors is bypassed.

The Installer Test is part of the Installer Setup options.
Enter Installer Setup screen and press the Down arrow key to bring up test selection(s) quickly.

CAUTION
Equipment Damage Hazard.
Minimum compressor off-time is bypassed during Installer System Test.
Avoid cycling compressor quickly.

Table 5. System Test(s).

Select	Installer Setup Number	Factory Setting		Other Choices		Comments
		Options	Description	Options	Description
Installer Test Cool	Test 1	0	Cool is off	1,2	0-   cool off 1-   cool stage 1 turns on 2-   cool stages 1 and 2 on	System selection determines which tests are available and the number of stages shown.
Installer Test Fan	Test 2	0	Fan is off	1	0-   fan off 1-   fan turns on	–
Installer Test Heat	Test 3	0	Heat is off	1-3	0-   heat off 1-   stage 1 heat on 2-   stages 1 and 2 heat on 3-   stages 1, 2 and 3 (Aux Ht) on	–
Installer Test Em Ht	Test 4	0	Emergency heat is off	1	0-emergency heat off 1-emergency heat on 2-emergency heat and auxiliary heat turn on	Available only if heat pump with auxiliary heat is selected.

ADVANCED FEATURES

Outdoor or Indoor Temperature Sensor
For accuracy, the initial reading of the indoor and outdoor temperature sensors require five minutes to stabilize. See the Sensor instructions for installation information.

Special Heat Pump Features
Heat Pump with Fossil Fuel Auxiliary Heat (Dual Fuel) and Outdoor Temperature Sensor In this operation there is no external fossil fuel kit (dual fuel kit) installed; the comfort control controls this function.

1. Choose correct heat pump application in Installer Setup Number 0170.
2. Choose Fossil Fuel Option as the backup heat source in Installer Setup Number 0200.
3. Choose No External Fossil Fuel Kit Option as controlling backup heat in installer Setup Number 0210.
4. Outdoor Temperature Sensor for Control Option is automatically chosen in Installer Setup Number 0340.
5. Choose appropriate Balance Point Temperature in Installer Setup Number 0350.

OPERATION IN HEAT MODE ABOVE BALANCE POINT (OUTDOOR TEMPERATURE)
When the outdoor temperature is above the selected Balance Point Temperature (ISU 0350), only the compressor operates and the fan (G terminal) energizes when the comfort control calls for heat.

OPERATION IN HEAT MODE BELOW BALANCE POINT (OUTDOOR TEMPERATURE)
When the outdoor temperature is below the selected Balance Point Temperature (ISU 0350), only the Fossil Fuel (auxiliary heat) operates and the fan (G terminal) does not energize when the comfort control calls for heat.

OPERATION IN EMERGENCY HEAT MODE
The balance point (outside) temperature is not used in the Emergency heat mode. When the comfort control is moved to the Emergency Heat position, the compressor is locked out. The first stage of heat is whatever is connected to the X2 terminal. The second stage of heat is what is connected to the W1 terminal. Often there is only one source of non-compressor heat and the X2 terminal is jumpered to the W1 terminal.

Heat Pump with Electric Auxiliary (Backup) Heat and Outdoor Temperature Sensor

1. Choose correct heat pump application in Installer Setup Number 0170.
2. Choose Electric as Auxiliary (Backup) Heat Source in Installer Setup Number 0200.
3. Choose Outdoor Temperature Sensor for Control Option in Installer Setup Number 0340.
4. Choose Compressor Lockout Temperature in Installer Setup Number 0350.
5. Choose Auxiliary Lockout Temperature in Installer Setup Number 0360.
   NOTE: There is a 5°F deadband between the Compressor and Auxiliary Heat Lockout Temperatures

OPERATION IN HEAT MODE
When the outdoor temperature is below the Compressor Lockout Temperature, only the Auxiliary Heat operates.
When the outdoor temperature is above the Auxiliary Lockout Temperature, only the Compressor operates.
See Fig. 21.

When the outdoor temperature is between the two temperatures, both the Compressor and Auxiliary Heat operate.

OPERATION IN THE EMERGENCY HEAT MODE
Once the comfort control is placed into the Emergency Heat mode, the compressor and auxiliary lockout features are turned off. In the Emergency heat mode, the compressor is locked out. The first stage of heat is whatever is connected to the X2 terminal. The second stage of heat is connected to the W1 terminal. Usually the emergency and auxiliary heat sources are electric strip heat in these cases.

Dehumidification Droop Control
The dehumidification control attempts to control to the user’s humidity setpoint by turning on the air conditioner.
In extremely high humidity conditions, the comfort control keeps the air conditioner running for up to 3°F below the temperature setpoint. It does this while trying to achieve the desired humidity setpoint and balancing that with the temperature setpoint.

TROUBLESHOOTING

(SEE TABLE 6)

Table 6. Troubleshooting.

Symptom	Possible Cause	Action
Display does not come on.	Comfort control is not being powered.	Check for 24 Vac between B and Rc.
Temperature settings do not change.	The upper or lower temperature limits were reached.	Check temperature setpoints. Check Installer Setup Numbers 0600 and 0610; modify as needed.
	The keypad is fully locked.	Check Installer Setup Number 0670 to change keypad locked options.
Heating or cooling does not come on.	Comfort control minimum off- time is activated.	Wait up to five minutes for the system to respond.
	System selection is not set to Heat or Cool.	Set system Selection to correct position.
	System type Selection is incorrect.	Check Installer Setup Number 0170 and make sure correct System type is chosen.
Comfort control is calling for Heat (Heat on) or Cool (Cool on) but no heating or cooling is running.	Heating or cooling equipment is not operating.	Check wiring. Check Installer Setup Number 0170 and make sure correct system type is chosen. Verify operation of equipment in System Test mode.
Comfort control does not respond when touch areas are pressed.	The keypad is locked.	Check Installer Setup Number 0670 to change keypad locked options.

® U.S. Registered Trademark
© 2006 American Standard Inc.

All Rights Reserved
Pub. No. 18-HD25D19-3
69-1790—3 M.S. Rev. 01-06

Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.

American Standard Inc.
Troup Highway
Tyler, TX 75711-9010

REFERENCE

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Trane TCONT802AS32DA Touch Screen Thermostat INSTALLATION INSTRUCTIONS

Trane TCONT802AS32DA Touch Screen Thermostat INSTALLATION INSTRUCTIONS