Honeywell T8600D, T8602D, T8601D User Manual

T8600D, T8601D and T8602D

Chronotherm® IV Deluxe Programmable

Thermostats

APPLICATION

The T8600, T8601 and T8602 Chronotherm® IV Deluxe Programmable Thermostats provide electronic control of 24 Vac single-stage heating and cooling systems.

T8600/T8601/T8602

FEATURES AND BENEFITS

•Full seven-day program capability; different schedules and temperature setpoints may be selected for everyday to match the homeowner’s flexible schedule.

•Copy key makes programming easier and faster for the installer and homeowner.

•Daylight Savings Time (DST) key for quick change in and out of Daylight Savings Time.

•Models available with programmable fan operation for added homeowner comfort.

•Easy temporary temperature setpoint changes for current period, vacation hold (1 to 255 days) or indefinite hold adds to the homeowner comfort and energy savings.

•Frequently used keys are located by the Liquid Crystal Display (LCD) for quick and easy access to information.

•Attractive styling complements any decor to the homeowner’s delight.

•Back lighting the large display makes the LCD very easy to read.

PRODUCT DATA

•Models available with outdoor temperature sensor capability for homeowner convenience. The sensor is also more accurate than a thermometer.

•Configurable features allows one model to be used to replace many different models (less inventory, no longer need to carry separate models to get these features).

—°F or °C temperature display;

—Automatic or manual changeover;

—Electric or conventional heat fan operation

—Adjustable heating cycle rate.

•Minimum off time for cooling compressors and heat pumps protects the equipment and extends the equipment life.

•Easy installation, setup and system test saves installer time and increases productivity.

•Self-test simplifies troubleshooting and saves time by overriding the time delays.

•Adaptive Intelligent Recovery™ control brings the room temperature to temperature setpoint at the programmed time, maximizing comfort and energy savings.

•Setpoints are permanently held in memory (no batteries used) and retained during power outages for increased installer and homeowner convenience.

•Power stealing, hardwired and battery powered models available for virtually all equipment and application needs.

•Universal Versaguard™ Thermostat guards available for added security.

	Contents
Application .............................................................................	1
T8600/T8601/T8602 Features and Benefits .........................	1
Specifications ........................................................................	2
Ordering Information .............................................................	2
Installation .............................................................................	4
Wiring ....................................................................................	4
Settings .................................................................................	6
Installer Setup .......................................................................	7
Installer Self-Test .................................................................	10
Thermostat Information .......................................................	11
Programming .......................................................................	11
Operation ............................................................................	16
Troubleshooting Guide ........................................................	17
Cross Reference .................................................................	19
Wiring Diagrams (Fig. 15-20) ..............................................	24

® U.S. Registered Trademark		68-0164-1
Copyright © 1997 Honeywell Inc. •	• All Rights Reserved

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

SPECIFICATIONS

IMPORTANT

The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit might not exactly match the listed specifications. This product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.

Thermostat Models

T8600, T8601 and T8602 Thermostats provide features listed in Table 1.

Electrical Rating (Nominal Range):

24 Vac, 50/60 Hz.

20 to 30 Vac, 50/60 Hz.

Batteries:

Only T8602 models require batteries.

Loss of Power:

The thermostat will maintain programmed times and temperatures for the life of the product. The clock and day information is retained for a minimum of thirty minutes.

System Current Load Ratings:

6 VA maximum at 30 Vac, 50/60 Hz.

Output Relay Load Rating:

See Table 2.

Temperature:

Ratings:

Operating Ambient: 40°F to 110°F (4°C to 43°C).

Shipping: -30°F to +150°F (-34°C to +65°C).

Display Accuracy: ±1°F (±0.5°C).

Setpoint:

Range:

Heating: 40°F to 90°F (4.5°C to 32°C). Cooling: 45° F to 99°F (7°C to 35°C)

Differential: 3°F (1.5°C). Default Settings: see Table 3.

Minimum Stage Operation Time:

Minimum Off (Heat and Cool ): factory setting 5 minutes; option 0 to 5 minutes.

Humidity Ratings:

5% to 90% RH, noncondensing.

Clock Accuracy:

+1 minute per month.

Table 1. Thermostat Features.

				System	Fan
		System	Changeover	Selection	Selection	Comments
T8600	(powered by either the heating or cooling system)
D		Heat-Cool	Automatic	Heat-Off-Cool-Auto	On-Auto	System and fan selections are done by keyboard.
T8601	(powered by common wire to supply power)
D		Heat-Cool	Automatic	Heat-Off-Cool-Auto	On-Auto	System and fan selections are done by keyboard.
T8602	(powered by batteries)
D		Heat-Cool	Automatic	Heat-Off-Cool-Auto	On-Auto	System and fan selections are done by keyboard.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1.Your local Home and Building Control Sales Office (check white pages of your phone directory).

2.Home and Building Control Customer Logistics Honeywell Inc., 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386

In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.

International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

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T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 2. Maximum Amps at 30 Vac.

Relay	Running (A)	Inrush (A)
Fan	0.5	2.5
Heat	1.5	3.5
Cool	1.5	7.5

	Table	3. Default Setpoints.
			Heat	Cool	Fan
Period	Time		Setpoint	Setpoint	Setting
Wake	6:00 AM		70°F	78°F	Auto
			(21°C)	(25.5°C)
Leave	8:00 AM		62°F	85°F	Auto
			(16.5°C)	(29.5°C)
Return	6:00 PM		70°F	78°F	Auto
			(21°C)	(25.5°C)
Sleep	10:00 PM		62°F	82°F	Auto
			(16.5°C)	(28°C)

Finish:

Taupe color.

Dimensions:

See Fig. 1.

Mounting Means:

The thermostat mounts on a wallplate. The wallplate mounts horizontally on a wall or outlet box with two no. 6 x 32 screws (included).

Accessories:

C7089B Outdoor Temperature Sensors (69-1020). Universal Versaguard™ Thermostat guards.

RECYCLING NOTICE

If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat.

3-5/8 (92)

2-3/4 (70)

3/8 (10)

1-13/16

(46)

3-1/2

(89)

1-9/16 (40)

6-1/16 (154)	1/2
	(13)

3-3/4

(95)

M10359

Fig. 1. Dimensions of thermostat in in. (mm).

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T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

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.Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.

3.Installer must be a trained, experienced service technician.

4.After completing installation, use these instructions to check out the product operation.

1.Position and level the wallplate (for appearance only). The thermostat will function properly even when not level.

2.Use a pencil to mark the mounting holes. See Fig. 3.

3.Remove the wallplate from the wall and drill two 3/16 inch holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 7/32 inch 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.

5.Loosely insert the mounting screws into the holes.

6.Tighten mounting screws.

Location

Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 2.

Do not install the thermostat 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 thermostat.

Wallplate Installation

The thermostat can be mounted horizontally on the wall or on a 2 in. x 4 in. wiring box. Position wallplate horizontally on the wall or on a 2 in. x 4 in. wiring box.

WIRING

All wiring must comply with local electrical codes and ordinances. Follow equipment manufacturer wiring instructions when available. Refer to Fig. 15 through 20 for typical hookups. A letter code is located near each terminal for identification. Refer to Table 4 for terminal designations.

CAUTION

Disconnect power before wiring to prevent electrical shock or equipment damage.

1.Loosen the terminal screws on the wallplate and connect the system wires. See Fig. 4

YES

NO

NO

5 FEET

[1.5 METERS]

NO

M10106

Fig. 2. Typical location of thermostat.

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T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

WALL

WIRES

THROUGH WALL

WALL ANCHORS

(2)

FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM).

FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM).

M4826

Fig. 4. Proper wiring technique.

MOUNTING

HOLES

MOUNTING

SCREWS

M15044

Fig. 3. Mounting the wallplate.

IMPORTANT

Use 18 gauge, color-coded thermostat cable for proper wiring.

2.Securely tighten each terminal screw.

3.Push excess wire back into the hole.

4.Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.

Mounting Thermostat Wallplate

The thermostat mounts on the wallplate after they are installed.

1.Engage tabs at the top of thermostat and wallplate. See Fig. 5.

2.Press lower edge of case to latch.

NOTE: To remove the thermostat from the wall, first pull out at the bottom of the thermostat; then remove the top.

Table 4. Terminal Designations and Descriptions.

Standard	Alternate
Terminal	Terminal
Designations	Designations	Typical Connection	Function	Terminal Type
B	—	Heating damper or changeover valve	Output	24V powered contact
C	Ba, C, X1, X2	Common	Input
G	F	Fan relay	Output	24V powered contact
O	R	Cooling damper or changeover valve	Output	24V powered contact
OT, OT	—	Outdoor temperature sensor (C7089B)	Input	—
R	V	24V system or heating transformer	Input	—
RC	—	24V cooling transformer	Input	—
W	H1, R3	Heating relay	Output	24V powered contact
Y	C1, M	Compressor contactor	Output	24V powered contact

a Some OEM models label the terminal for transformer common B.

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T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

A. ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.

B. PRESS LOWER EDGE OF CASE TO LATCH.

M15043

Fig. 5. Mounting thermostat on wallplate.

SETTINGS

Using Thermostat Keys

The thermostat keys are used to:

•set current day and time,

•program times and setpoints for heating and cooling,

•temporarily override program temperatures,

•display present setting,

•configure Installer Setup,

•check System Test,

•display outdoor temperature (select models),

•set the system operation,

•set the fan operation.

See Fig. 6 for the location of the keys.

System and Fan Settings

The system default setting is Heat and the fan default setting is Auto. Use the System and Fan keys to change the settings. See Fig. 7. The fan settings can be set for each program period individually. The system selection is for all the program periods.

SET WAKE TIMES

AND SETPOINTS

SET LEAVE TIMES

INCREASE TIME SETTING AND SETPOINTS

OR SCROLL FORWARD

THROUGH INSTALLER SETUP

AND SYSTEM TEST

SET RETURN TIMES

AND SETPOINTS

SET CURRENT

DAY AND TIME

RETURN TO

NORMAL

OPERATIONS

ENTER

	INDEFINITE			Time	Set Program
	OR TIMED	Run	Set Current	Wake	Leave	Return	Sleep
	HOLD MODE	Program	Day/Time
		Hold Temp	Day	Heat/Cool		System	Fan
				Settings
	SET CURRENT OR		Daylight	Copy
			Time
	PROGRAM DAY
	CHANGE BETWEEN
	DAYLIGHT SAVINGS					CHANGE BETWEEN
	AND STANDARD TIME					HEATING AND COOLING
						SETPOINTS

COPY ONE PROGRAMMED DAY TO ANOTHER DAY

DECREASE TIME SETTING

OR SCROLL BACKWARD THROUGH INSTALLER SETUP AND SYSTEM TEST

INCREASE TEMPERATURE SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP OPTIONS

DECREASE TEMPERATURE SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP OPTIONS

DISPLAY INFORMATION SUCH AS PRESENT SETTINGS AND OUTDOOR TEMPERATURE

SET SLEEP

TIMES AND

SETPOINTS

SELECT FAN

OPERATION

SELECT SYSTEM

OPERATION

M10405A

Fig. 6. Key locations and descriptions.

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T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

System settings control the thermostat operation as follows: Heat: The thermostat controls the heating.

Off: Both the heating and cooling are off. Cool: The thermostat controls the cooling.

Auto: The thermostat automatically changes between heating and cooling operation, depending on the indoor temperature.

Fan settings control the system fan as follows:

On: Fan operates continuously.

Auto: Fan operates with equipment.

		Time	Set Program
Run	Set Current	Wake	Leave	Return	Sleep
Program	Day/Time
Hold Temp	Day	Heat/Cool			System
		Settings		System	Fan
	Daylight	Copy
	Time				Fan

M15042

Fig. 7. Thermostat System and Fan key locations.

NOTE: Always press the keys with your fingertip or similar blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard.

The Installer Setup is used to customize the thermostat to specific systems. Some of the options include temperature display, changeover and outdoor temperature display. Installer Setup numbers are listed in Table 6. The table includes all the configuration options and the factory-settings for the thermostat.

A combination of key presses are required to use the Installer Setup feature.

—To enter the Installer Setup, press and hold the Information i key with the increase ▲ and decrease ▼ keys until the first number is displayed. All display segments appear for approximately three seconds before the number is displayed. See Fig. 8 and 9.

—To advance to the next Installer Setup, press the Time ▲ key.

—To change a setting, use the increase ▲ or decrease ▼ key.

—To scroll the Installer Setup numbers backwards, press the Time ▼ key.

—To exit the Installer Setup, press Run Program.

Set Program Start Time Set Day/Time Temporary Setting Enrg

Hold for	AM			Sav
Em Ht				Room
	PM
Aux Ht				%Humid
MonTueWedThuFriSatSun		Heat Cool		Outdoor
WakeLeaveReturnSleep		In Recovery	Auto	Repl Batt
System		DST	Fan
Em Heat OffCool Auto		Wait		OnAuto

M10345

Fig. 8. Display of all the segments of the LCD.

Temperature Settings

Refer to Table 5 for the default program. If the daytime energy savings period is not used, press the period key (Leave or Return) until the time is blank. The fan setting feature is available on select thermostat models. See Programming Section for complete instructions on changing the program.

Table 5. Default Program Settings.

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

INSTALLER SETUP

NOTE: For most applications, the thermostat factorysettings will not need to be changed. Review the factory settings in Table 6 and if no changes are necessary, go to the Installer System Test section.

INSTALLER SETUP	FACTORY SETTING	M10404
NUMBER DISPLAY	OR OTHER CHOICE
(COLUMN 2	DISPLAY (COLUMN 3
OF TABLE 6)	OR 5 OF TABLE 6)

Fig. 9. Display of Installer Setup number and setting.

CAUTION

Heat pump and electric heat systems must be configured to 1 in Installer Setup number 2 to prevent equipment damage caused by the system running without the fan.

IMPORTANT

Only configurable numbers are shown on the device. Example: If thermostat does not have a system key, Installer Setup Number 12 will not be displayed.

Review Table 6 factory-settings and mark any desired changes in the Actual Settings column. When Installer Setup is complete, review the settings to confirm that they match the system.

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T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

		Table	6. Thermostat Installer Setup Options.
	Installer Setup					Other Choices
	Number (Press
	Time ▲ key to	Factory-Setting			(Press ▲ or ▼ key to change)			Actual
	change)							Setting
Select		Display		Description	Display	Description
Not used	1	—		—	—	—		—
Fan operationa	2	0		Conventional	1	Heat pump or electric heat
				applications where		applications where thermostat
				equipment controls fan		controls fan operation in heat
				operation in heat mode		mode
Not used	3	—		—	—	—		—
Heating cycle	4	6		6—6 cph used for	1, 3 or 9	1—1 cph used for radiant floor
rate				conventional heat		heat, gravity system
						3—3 cph used for hot water
						systems or high efficiency
						furnaces
						9—9 cph used for electric heat
						systems
Not used	5 thru 11	—		—	—	—		—
System setting	12	1		Manual changeover	0 or 2	0—Auto changeover
adjustment						2—Fixed auto changeover
Adaptive	13	0		Adaptive Intelligent	1	Conventional recovery (system		—
Intelligent				Recovery™ control is		starts recovery at programmed
Recovery™				activated (system		time)
control				starts early so setpoint
				is reached by start of
				program period)
Degree	14	0		Temperature is	1	Temperature is displayed in °C
temperature				displayed in °F
display
Not used	15	—		—	—	—		—
Clock format	16	0		12-hour clock format	1	24-hour clock format
Not used	17 and 18	—		—	—	—		—
Extended fan	19	0		No extended fan	1	Fan operation is extended 90
operation in				operation after the call		seconds after the call for heat
heatinga				for heat ends		ends.
Extended fan	20	0		No extended fan	1	Fan operation is extended 90
operation in				operation after the call		seconds after the call for cool
cooling				for cool ends		ends.
Not used	21 thru 23	—		—	—	—		—
Outdoor	24	0		No outdoor	1	Outdoor temperature is
temperature				temperature is		displayed. Needs a
display (select				displayed		C7089B1000 Outdoor Sensor
models)						to operate
Not used	25 thru 29	—		—	—	—		—
Deadband	30	3		Heating and cooling	4 thru 10	Heating and cooling setpoints
				setpoints can be set		can be set no closer than the
				no closer than 3°F		chosen value:
				(1.5°C)		4—4°F (2°C)
						5—5°F (2.5°C)
						6—6°F (3°C)
						7—7°F (3.5°C)
						8—8°F (4°C)
						9—9°F (4.5°C)
						10—10°F (5°C)
a Number 2 must be set to 1 to extend fan operation.
							(continued)

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T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

		Table		6. Thermostat Installer Setup Options (continued).
		Installer Setup					Other Choices
		Number (Press
		Time ▲ key to		Factory-Setting		(Press ▲ or ▼ key to change)		Actual
		change)						Setting
	Select		Display		Description	Display	Description
	Not used	31 and 32	—		—	—	—	—
	Minimum off time	33	5		5 minute minimum off	0 thru 4	Minimum number of minutes (0
	for the				time for the		thru 5) the compressor will be
	compressor				compressor		off between calls for the
							compressor
	Temperature	34	90		Highest setpoint	40 to 89	Temperature range (1°F
	range stops in				heating can be set to		increments) heating setpoint
	heating						can be set to
	Temperature	35	45		Lowest setpoint	46 to 99	Temperature range (1°F
	range stops in				cooling can be set to		increments) cooling setpoint
	cooling						can be set to
	Not used	36	—		—	—	—	—
	Temperature	37	0		No difference in	3 thru -3	1—Display adjusts to 1°F
	display				displayed temperature		higher than actual room
	adjustment				and actual room		temperature
					temperature		2—Display adjusts to 2°F
							higher than actual room
							temperature
							3—Display adjusts to 3°F
							higher than actual room
							temperature
							-1—Display adjusts to 1°F lower
							than actual room temperature
							-2—Display adjusts to 2°F lower
							than actual room temperature
							-3—Display adjusts to 3°F lower
							than actual room temperature
	a Number 2 must be set to 1 to extend fan operation.

IMPORTANT

Review the settings to confirm that they match the system. Press Run Program to exit the Installer Setup. The thermostat has saved the Installer Setup changes and initiated a reset in order to operate with these new settings. Be sure to set the current day and time immediately.

Setting Current Day and Time

1.Press Set Current Day/Time.

NOTE: On initial power up or after an extended power loss, 1:00 pm flashes on the display until a key is pressed.

Set Day/Time

Set Current							PM
	Program	Day/Time	Time	Wake	Set Program	Sleep	Mon
					Leave Return
	Run	Set Current
Day/Time	Hold Temp	Day		Settings	System	Fan
				Heat/Cool
		Daylight	Copy
		Time

M10312

2.Press Day until the current day is displayed.

NOTE: Sun=Sunday, Mon=Monday, Tue=Tuesday, Wed=Wednesday, Thu=Thursday, Fri=Friday, Sat=Saturday.

Set Day/Time

								PM
			Time		Set Program			Tue
Day	Run	Set Current		Wake	Leave	Return	Sleep
	Program	Day/Time
	Hold Temp	Day		Heat/Cool		System	Fan
				Settings
		Daylight	Copy
		Time

M10313

3.Press Time ▲ or Time ▼ until the current time is displayed.

NOTE: Tapping the Set Current Day/Time will change the time in one hour increments.

Time

Set Day/Time

AM

		Time		Set Program			Tue
Run	Set Current		Wake	Leave	Return	Sleep
Program	Day/Time
Hold Temp	Day		Heat/Cool		System	Fan
			Settings
	Daylight	Copy
	Time

M10314

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