Honeywell TH8320U, TH8321U User Manual

TH8320U and TH8321U Touch Screen

Programmable Thermostats

INSTALLATION INSTRUCTIONS

APPLICATION

The TH8320U and TH8321U Touch Screen Universal Programmable Thermostats provide electronic control of 24 Vac heating and cooling systems or 750 mV heating system. See Table 1 for a general description.

Table 1. TH832 Thermostats Description.

Model

TH8320U Batteries or

TH8321U System and Fan selection

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.

Power

Method Changeover System Selection Fan Selection Comments

common wire

Automatic or manual selectable

Heat-Off-CoolAuto (Em. Heat for heat pumps)

On-Auto-Circ System and Fan selection

vary based on system type

vary based on System type. Humidity sensor to control dehumidification.

Selecting Location

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

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 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.

NO

YES

NO

5 FEET

[1.5 METERS]

Fig. 1. Selecting thermostat location.

M19925

69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

CO

L

SC

S

H

UMP

S1

2

C

G

C

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.

Installing Wallplate

CAUTION

Electrical Hazard. Can cause electrical shock or equipment damage.

Disconnect power before wiring.

The thermostat 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.

WALL

WIRES THROUGH WALL AND WIRE SLOT

WALL ANCHORS (2)

MOUNTING HOLES (2)

MOUNTING SCREWS (2)

Fig. 2. Mounting wallplate.

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 the mounting screws into the holes and tighten.

M19916

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 thermostat.

EAT P NVENTIONA

Y2

L

E

AUX

S1

S2

Fig. 3. Selecting terminal identifications for

Table 2. Selecting Terminal Identifications for

W2

S

system type.

System Type.

System Type

R

W

Y

REW TERMINAL

Wallplate

Terminal

Identifications

RC

R

O/B

Y

G

C

M19951

Wiring

Diagram

Reference

Standard Heat/Cool Conventional 5, 6

Heat Only Conventional 7

Heat Only with Fan Conventional 8

Heat Only Series 20 Conventional 9

Cool Only Conventional 10

Standard Multistage up to 2 Heat/2 Cool

Heat Pump with No Auxiliary Heat

Heat Pump with Auxiliary Heat

Conventional 11, 12

Heat Pump 13, 14

Heat Pump 15, 16

WIRING (FIG. 5-16)

All wiring must comply with local electrical codes and ordinances.

1. Select set of terminal identifications (Table 2) that corresponds with system type (conventional 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.

69-1706 2

Fig. 4. Inserting wires in terminal block.

IMPORTANT

Use 18 gauge thermostat wire.

M19917

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

CONVENTIONAL

RC

Y2

W2 S1

S2

3

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

FACTORY INSTALLED JUMPER.

3

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

Fig. 5. Typical hookup of conventional single-stage

heat and cool system with single transformer

Y2

W2 S1

S2

3

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

REMOVE FACTORY INSTALLED JUMPER.

3

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

2

R

W

Y

G

C

CONNECTION

FAN

RELAY

COMPRESSOR

CONTACTOR

HEAT RELAY

(1H/1C conventional).

CONVENTIONAL

RC

2

R

W

Y

G

C

CONNECTION

FAN

RELAY

COMPRESSOR

CONTACTOR

HEAT RELAY

OPTIONAL

24 VAC

COMMON

OPTIONAL

24 VAC

COMMON

M19895

M19896

CONVENTIONAL

RC

1

R

C

Y2

W2 S1

S2

3

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

FACTORY INSTALLED JUMPER.

3

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 heat-only system

Y2

W2

1

R

C

1

C

R

OUTDOOR/INDOOR

1

2

3

S1 S2

3

TEMPERATURE

SENSOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

FACTORY INSTALLED JUMPER.

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

Fig. 8. Typical hookup of heat only system with fan

2

R

W

Y

G

C

HEAT RELAY

(1H conventional).

CONVENTIONAL

RC

2

R

W

Y G C

FAN

RELAY

HEAT RELAY

(1H conventional).

CONNECTION

OPTIONAL

24 VAC

COMMON

OPTIONAL

24 VAC

COMMON

CONNECTION

1

R

C

M19897

1

R

C

M19898

Fig. 6. Typical hookup of conventional single-stage

heat and cool system with two transformers

(1H/1C conventional).

3 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

C

G

CS2S1

CO

L

CONVENTIONAL

RC

Y2

W2 S1

S2

3

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

FACTORY INSTALLED JUMPER.

3

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

2

R

W

Y

G

C

W BR

SERIES 20

MOTOR OR

TR

1

VALVE

M19899

Fig. 9. Typical hookup of heat only Series 20 system.

NVENTIONA

R

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

HEAT RELAY 2

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

FACTORY INSTALLED JUMPER.

3

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

COOL RELAY 2 COOL RELAY 1

HEAT RELAY 1

R

C

CONVENTIONAL

RC

Y2

W2 S1

S2

3

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

FACTORY INSTALLED JUMPER.

3

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 cool only system

COMMON CONNECTION

MUST COME FROM

2

R

W

Y G C

RELAY

COMPRESSOR

CONTACTOR

(1C conventional).

OPTIONAL 24 VAC

THE COOLING

TRANSFORMER.

FAN

OPTIONAL

24 VAC

COMMON

CONNECTION

FAN RELAY

M19901

1

R

C

M19900

1

R

C

Fig. 11. Typical hookup of conventional multistage two-stage heating and two-stage cooling

in a single transformer system (2H/2C or 2H/1C or 1H/2C conventional).

69-1706 4

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

C

G

CS2S1

CO

L

C

O/

G

C

UX

SI

S2

P

3

COMMON CO

ON

NVENTIONA

R

OPTIONAL 24 VAC

COMMON CONNECTION

MUST COME FROM

THE COOLING

TRANSFORMER.

OUTDOOR/INDOOR

3

TEMPERATURE

SENSOR

HEAT RELAY 2

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

FACTORY INSTALLED JUMPER REMOVED.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABL

3

SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 12. Typical hookup of conventional multistage two-stage heating and two-stage cooling

in a two-transformer system (2H/2C or 2H/1C or 1H/2C conventional).

COOL RELAY 2 COOL RELAY 1

HEAT RELAY 1

FAN RELAY

HEAT PUM

R

1

R

C

M19902

1

R

C

1

R

C

B

A

OPTIONAL 24 VAC

NNECTI

OUTDOOR/INDOOR

4

TEMPERATURE

SENSOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

1

FACTORY INSTALLED JUMPER.

2

"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

3

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

4

FROM THE THERMOSTAT CABLE.

CHANGEOVER

VALV E

Fig. 13. Typical hookup of single-stage heat pump with no auxiliary/backup heat (1H/1C heat pump).

5 69-1706

FAN RELAY

COMPRESSOR

M19903

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

C

O/

G

C

UX

SI

S2

P

3

COMMON CO

ON

O/

G

C

UX

SI

S2

P

6

5

COMMON CO

ON

HEAT PUM

R

B

A

OPTIONAL 24 VAC

NNECTI

OUTDOOR/INDOOR

TEMPERATURE

5

SENSOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

1

FACTORY INSTALLED JUMPER.

2

MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BE USED AS A 24 VAC

3

OUTPUT. SEE "L TERMINAL" SECTION FOR MORE INFORMATION.

4

"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

5

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

CHANGEOVER

VALV E

Fig. 14. Typical hookup of multistage heat pump with no auxiliary/backup heat (2H/2C heat pump).

HEAT PUM

FAN RELAY

COMPRESSOR 1COMPRESSOR 2

EQUIPMENT

MONITOR

M19904

1

R

C

1

R

C

A

3

OUTDOOR/INDOOR

TEMPERATURE

4

SENSOR

HEAT 2 RELAY

(AUXILIARY HEAT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

1

FACTORY INSTALLED JUMPER.

2

OUTDOOR SENSOR REQUIRED IN SYSTEM WITH FOSSIL FUEL BACKUP HEAT THAT IS NOT USING AN EXTERNAL FOSSIL FUEL KIT.

3

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

4

FROM THE THERMOSTAT CABLE.

MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BE USED AS

5

A 24 VAC OUTPUT. SEE "L TERMINAL" SECTION FOR MORE INFORMATION.

"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

6

Fig. 15. Typical hookup of single-stage heat pump with auxiliary/backup heat (2H/1C heat pump).

69-1706 6

EMERGENCY

HEAT RELAY

B

CHANGEOVER

VALV E

OPTIONAL 24 VAC

NNECTI

FAN RELAY

COMPRESSOR

RELAY

M19905

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

O/

G

C

UX

SI

S2

P

6

5

COMMON CO

ON

HEAT PUM

EQUIPMENT

MONITOR

B

A

OPTIONAL 24 VAC

NNECTI

OUTDOOR/INDOOR

3

TEMPERATURE

4

SENSOR

HEAT 2 RELAY

(AUXILIARY HEAT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

1

FACTORY INSTALLED JUMPER.

2

OUTDOOR SENSOR REQUIRED IN SYSTEM WITH FOSSIL FUEL BACKUP HEAT THAT IS NOT USING AN EXTERNAL FOSSIL FUEL KIT.

3

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

4

FROM THE THERMOSTAT CABLE.

MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BE USED AS

5

A 24 VAC OUTPUT. SEE "L TERMINAL" SECTION FOR MORE INFORMATION.

"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

6

EMERGENCY

HEAT RELAY

COMPRESSOR 2 COMPRESSOR 1

CHANGEOVER

VALV E

FAN RELAY

Fig. 16. Typical hookup of multistage heat pump with auxiliary/backup heat (3H/2C heat pump).

Powering the Thermostat

There are two different ways to power the thermostat:

• Batteries (three AAA alkaline).

• 24 Vac Common wire.

M19906

1

R

C

Wiring 24 Vac Common

Wire the common side of the transformer to the C screw of the thermostat wallplate. When installing in a single transformer system, keep jumper wire between the R and Rc screws. When installed in a two-transformer system, use the common from the cooling transformer to connect to C screw and remove the jumper wire between the R and Rc screws.

Inserting Batteries (Optional)

If not using a 24 Vac Common to power the thermostat, install three AAA alkaline batteries (included) in the back of the thermostat. Make sure the positive and negative terminals are oriented correctly, as marked on the device. See Fig.17.

BATTERIES (3)

M19918

Fig. 17. Installing batteries on thermostat back.

Mounting the Thermostat

1. Align the terminal screw blocks with the pins on the back of the thermostat.

2. Push the thermostat straight onto the wallplate. See Fig. 18.

7 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

E

MON

UE

THUSASUN

E

MON

THUSASUN

CHANGE FILTER UV LAMP HUMIDIFIER PAD

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

USE ARROWS TO SET YEAR AND TIME

R

U

WALL

INSTALLATION

REMOVE DURING

M19919

Fig. 18. Mounting thermostat on wallplate.

Adjusting Real-Time Clock

Setting Calendar and Time

Locate and remove the tab labeled Remove in the lower left corner on the thermostat back. The tab must be removed to activate the real-time clock. See Fig. 19.

REMOVE TAB TO ACTIVATE REAL TIME CLOCK

INSTALLATION

REMOVE DURING

INSTALLATION

REMOVE DURING

M19920

Fig. 19. Removing tab to activate real-time clock.

This thermostat 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 thermostat is first powered, the display is ready for the calendar date to be entered. See Fig. 20.

SET CURRENT DAY SET MONTH

T

DON

M19921

Fig. 20. Setting calendar and time after initial

IMPORTANT

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

powerup.

Using the Thermostat

The thermostat 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 thermostat.

1. Use the arrow keys to set the Year, Month and Day, as shown in Fig. 20.

2. Press the Done key.

3. Use the arrow keys to set the current time. See

Fig. 20.

4. Press the Done key.

69-1706 8

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

E

MON

UE

THUSASUN

SYSTEM

OFF

COOL

g

Schedule

de

Se

o

OPERATION

System and Fan Settings

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

SYSTEM SETTINGS

Heat: Thermostat controls heating system. Off: Both heating and cooling are off. Cool: Thermostat controls cooling system. Auto: Thermostat 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 thermostat 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 thermostat. It is only visible when lighted:

• It indicates when the thermostat is in the Emergency Heat mode. When in Em. Ht. mode, the L terminal is continuously energized and the LED is on.

• When the L terminal is wired to an equipment monitor, the LED signals when a check or fail signal is sent to the thermostat from the system. See Fig. 21. (This can occur only when the thermostat is not in Em. Ht. mode.)

C

EQUIPMENT

MONITOR

L TO R

Fig. 21. L terminal switch to R (power) side of system

transformer.

TO C

M19907

INSTALLER SETUP

This Universal Thermostat works with many different system types. To operate correctly, the thermostat must be set up to operate the installed heating and/or cooling system.

Installer Setup Menus

Main Menu: Offers the most commonly used options.

It is necessary to enter this menu to set the thermostat to the type of system it is operating. Many applications use only the Main Menu.

Regional Menu: Offers choices often changed due to a particular area or region. For example, temperature display in Fahrenheit or Celsius is offered in this menu.

Advanced Settings Menu: Offers more settings to fully customize the thermostat. Many of these settings do not require changing from the factory settings.

Entering Installer Setup

1. Thermostat must be powered either with Alkaline AAA batteries or with 24 Vac Common wire.

2. From the home screen, press System key. (Press Done or Cancel key to return to home screen.)

3. Five blank touch keys show on the bottom of the screen between the Done and Cancel keys. Press and hold the two blank keys on either side of the center blank key for approximately five seconds until screen changes. See Fig. 22.

T

Insi

DON

t T

Followin

CANCEL

Preprogrammed Settings

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

Table 3. Default Program Settings.

70 (21

62 (16.5

70 (21

62 (16.5

Setpoints

°

F

°

C)

°

F

0

C)

°

F

°

C)

°

F

°

C)

°

78 (25.5

°

85 (29.5

°

78 (25.5

°

82 (28

F

°

C)

Schedule

Period Time

Wake 6:00AM

Leave 8:00AM

Return 6:00PM

Sleep 10:00PM

M19923

Fig. 22. Entering Installer Setup.

Fan

SettingHeat Cool

Auto

°

C)

Auto

0

C)

Auto

°

C)

Auto

9 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

DONE

MON

THUSASUN

A

4. The Installer Setup Number is displayed in the lower left. It is a four-digit code beginning with zero. The factory setting or other choice selection is displayed in the lower right. See Fig. 23. This is a twodigit code shown in the Option column of Table 4.

ADVANCE TO NEXT

INSTALLER SETUP NUMBER

PRESS TO EXIT INSTALLER SETUP

Fig. 23. Installer Setup Number and factory setting

selection locations.

INSTALLER SETUP

FACTORY SETTING

CHANGE THE FACTORY SETTING

M19922

Changing Installer Setup Selections

1. Advance to the next Installer Setup Number by pressing the up and down arrow keys to the right of the four-digit Installer Setup Number. See Fig. 23.

2. Change the factory Setting Options by pressing the up and down arrow keys to the right of the two-digit code selection. See Fig. 23.

Exiting Installer Setup

1. Press the Done key to exit the Installer Setup screen.

IMPORTANT

The three Installer Setup Menus (Tables 4-6) show 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 available to change.

Table 4. Main Installer Setup Menu.

Factory Setting Other Choices

Installer

Select

Setup

Number

Not used. 1 thru 0099 — — — — —

Date (Year Upper)

Date (Year Lower)

Date (Month) 0140 6 Digit(s) represents

Date (Day)

Schedule Options

0120 20 Set first two digits of

0130 04 Represents last two

0150 15 Digit(s) represents

current calendar year (20 for year 2005, etc)

digits of current calendar year (2004).

current calendar month.

current calendar date.

21 21 —first two digits of

00 -99 Select last two digits of

1-12 Select number that

1-31 Select number that

current calendar year (21xx)

current calendar year.

represents current calendar month.

represents current calendar date.

0160 4 7-day programming 0 0 —nonprogrammable —

CommentsOption Description Options Description

2000 -2178 available

2001-2178 available

—

69-1706 10

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 4. Main Installer Setup Menu. (Continued)

Factory Setting Other Choices

Installer

Select

System Type Selection

Fan Operation 0180 0 Conventional

Reversing Valve (O/B) Operation

Backup Heat Source (Auxiliary Heat)

External Fossil Fuel Kit

Cycles per hour (cph) for 1st Stage Compressor

Cycles per hour (cph) for 2nd Stage Compressor

Setup

Number

0170 1 1 Heat/1Cool 1-12 1— 1 h e a t / 1 c o o l

applications where equipment controls fan operation in heat mode.

0190 0 O/B terminal is

0200 0 Heat pump backup

0210 1 External fossil fuel kit

0220 3 Compressor Stage 1

0230 3 Compressor Stage 2

energized for reversing valve in cooling

heat source is electric.

is controlling heat pump backup heat

cycles per hour (cph)

2—single-stage heat p u m p ( n o a u x . h e a t )

3— h e a t o n l y ( n o f a n ) 4— h e a t o n l y ( w i t h f a n ) 5—hot water Series 20

(3-wire or normally open z o n e v a l v e s )

6— c o o l o n l y 7—2 heat/1cool heat

pump 8—2 heat/2 cool multistage conventional 9—2 heat/1cool multistage conventional 10—1 heat/2 cool multistage conventional 11—2 heat/2 cool heat pump (with no auxiliary hea t) 12—3 heat/2 cool heat pump (with auxiliary heat)

1 Heat pump or electric

1 O/B terminal is energized

1 Heat pump backup heat

0 No external fossil fuel kit

1-6 1-6 available;

heat applications where thermostat controls fan operation in heat mode.

for reversing valve in heating

source is fossil fuel.

is controlling heat pump backup heat. This thermostat controls the backup fossil fuel heat with outdoor sensor (C7089U).

3 is recommended.

CommentsOption Description Options Description

Available options and defaults vary by thermostat. System selection automatically modifies some default settings and/ or hides other Installer Setup options.

Only shown if conventional system is selected. If heat pump is chosen, fan defaults to electric.

Only shown if heat pump system is chosen.

Only shown if 2 heat/1 cool or 3 heat/2 cool heat pump is chosen.

Only shown if fossil fuel is chosen as backup heat source.

—

Only shown if two stages of cool are selected.

11 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 4. Main Installer Setup Menu. (Continued)

Factory Setting Other Choices

Installer

Select

Cycles per hour (cph) for 1st Stage Conventional Heat

Cycles per hour (cph) for 2nd Stage Heat

Setup

Number

0240 5 Conventional Heat

0250 5 Cycles per hour (cph)

Stage 1 cycles per hour (cph)

for 2nd Stage Conventional Heat or Auxiliary Heat for 2 H/1C Heat Pump Systems

1-12 1-12 available; typical

s e t t i n g s : 1—1 cph used for steam o r g r a v i t y s y s t e m . 3—3 cph used for hot water systems or high efficiency (90% or better) fossil fuel forced air s y s t e m s. 5—5 cph used for standard fossil fuel forced air systems. 9—9 cph used for electric forced air heat systems.

s e t t i n g s : 1—1 cph used for steam or gravity system. 3—3 cph for hot water systems or high efficiency (90% or better) fossil fuel forced air systems. 5—5 cph for standard fossil fuel forced air s y s t e m s. 9—9 cph used for electric forced air heat systems (electric auxiliary heat for heat pump systems).

CommentsOption Description Options Description

Not shown if system selection is heat pump. Selection in this stage changes default cph for 2nd stage heat.

Only shown if two stages of heat are selected.

69-1706 12

Select

Cycles per hour (cph) for 3rd Stage Heat

Cycles per hour (cph) for Em Heat

Continuous Backlight

Additional Menu Choices

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 4. Main Installer Setup Menu. (Continued)

Factory Setting Other Choices

Installer

Setup

Number

0260 9 Cycles per hour (cph)

0270 9 Cycles per hour (cph)

0280 0 Backlight not on

0290 0 Only main menu

for Auxiliary Heat in 3H/2C Heat Pump Systems

for Emergency Heat

continuously. Thermostat backlight comes on with each key press.

options are shown. Installer Test Options shown next (Table 7).

1-12 1-12 available; typical

1-12 1-12 is available; typical

1 Backlight is on

1,2 1—Main Menu and

s e t t i n g s : 1—1cph for steam or g r a v i t y s y s t e m . 3—3 cph for hot water systems or high efficiency (90% or better) fossil fuel forced air systems. 5—5 cph for standard fossil fuel forced air s y s t e m s . 9—9 cph for electric forced air heat systems. (electric auxiliary heat for heat pump systems).

s e t t i n g s : 3—3 cph for hot water systems or high efficiency (90% or better) fossil fuel f o r c e d a i r s y s t e m s . 5—5 cph for standard fossil fuel forced air s y s t e m s . 9—9 cph for electric heat systems.

continuously (thermostat must have a common wire attached for this function).

Regional Settings are shown plus Installer Test (Tables 5 and 7 only).

2—All remaining Menu/ Options shown plus Installer Test (Tables 5, 6 and 7).

CommentsOption Description Options Description

Only shown if 3H/2C heat pump system is selected.

Only shown if 2 heat/1 cool or 3 heat/2 cool heat pump is selected.

Option is always shown; however, continuously on backlight works only if thermostat is wired with 24 vac Common.

The majority of application require only the Main Menu Options.

13 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 5. Regional Settings Menu.

Installer

Select

Setup

Number

Changeover 0300 0 Manual changeover 1 1—auto

Deadband 0310 3 Heating and cooling

Temperature Indication Scale

Daylight Savings

0320 0 Temperature is

0330 1 Daylight savings

Factory Setting Other Choices

changeover

setpoints can be set no closer than 3

°

(1.5

C)

displayed in

enabled (United States).

°

F

°

F.

2 thru 9 Heating and

1 Temperature is

0 0—daylight savings

cooling setpoints can be set no c l o s e r t h a n c h o s e n v a l u e :

°

2—2

°

3—3

°

4—4

°

5—5

°

6—6

°

7—7

°

8—8

°

9—9

displayed in °C.

is disabled.

F (1°C ) F (2°C ) F (2.5°C ) F (3°C ) F (3.5°C ) F (4°C ) F (4.5°C ) F (5°C)

CommentsOption Description Options Description

—

Shown only if automatic changeover is selected.

—

Set to 0 in areas that do not follow daylight savings.

69-1706 14

Select

Remote Temperature Sensor (Outdoor or Indoor)

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 5. Regional Settings Menu. (Continued)

Installer

Setup

Number

0340 0 No remote

Factory Setting Other Choices

temperature sensor

1-3 1—outdoor

temperature sensor for display only. 2—outdoor temperature sensor for control. Used for select heat pump systems. (See Special Heat Pump Features section for more details.) 3—indoor temperature sensor

CommentsOption Description Options Description

Defaults and Options depend on System Type selection. Indoor Temperature Sensor uses an averaging network and does not include on-board sensor.

When number 0210 is set to zero, this item is automatically selected to number 2 and not shown.

Heat Pump Compressor Lockout or (Balance Point)

Heat Pump Auxiliary Lockout

Indoor Dehumidification Control

0350 0 No compressor

0360 0 No heat pump

0380 0 No indoor

lockout.

auxiliary lockout

dehumidification control

15, 20, 25, 30, 35, 40, 45

40, 45, 50, 55, 60

1 1—dehumidi-

N o l o c k o u t .

°

F (-9.5°C )

15

°

20

F (-6.5°C )

°

25

F (-4°C )

°

30

F (-1°C )

°

35

F (1.5°C )

°

40

F (4.5°C )

°

45

F (7°C)

N o l o c k o u t .

°

F (4.5°C )

40

°

45

F (7°C )

°

50

F (10°C )

°

55

F (13°C )

°

60

F (15.5°C)

fication droop control. (See Advanced Features section for more information.)

Default depends on other selections. Shown if Outdoor Temperature for control is selected. (See Advanced Features section for more information.)

Shown if electric is chosen for backup heat source and outdoor temperature sensor for control is selected. (See Advanced Features section for more information.)

Available on models with humidity sensor.

15 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 6. Advanced Settings Menu.

Select

Furnace Filter Change Reminder

Humidifier Pad Replace-ment Reminder

UV Lamp Replace-ment Reminder

Adaptive Intelligent Recovery™

Number of Periods

Installer

Setup

Number

0500 0 Furnace filter change

0510 0 Humidifier pad

0520 0 UV Lamp

0530 1 Adaptive Intelligent

0540 4 Four periods

Factory Setting Other Choices

reminder off

replacement reminder off

Recovery™ control is activated (system starts early so setpoint is reached by start of program period).

available (Wake, Leave, Return, Sleep)

1-6 1—10 run time

1-3 1—90 calendar

1 1—365 calendar

0 0—conventional

2Two periods

d a y s 2—30 run time d a y s 3—60 run time d a y s 4—90 run time d a y s 5—120 run time d a y s 6—365 run time d a y s

d a y s 2—180 calendar d a y s 3—365 calendar d a y s

days

recovery (system starts recovery at programmed time)

available (Wake and Sleep)

CommentsOption Description Options Description

Run time based on call for fan.

—

Not shown if nonprogrammable is selected. 2 or 4 applies to all days of the week.

Minimum Compressor Off Time

Heat Temperature Range Stop

Cool Temperature Range Stop

Clock Format 0640 12 12-hour clock format 24 24-hour clock

Extended Fan on time Heat

Extended Fan on time Cool

69-1706 16

0580 5 Five minute minimum

0600 90 Highest heating

0610 50 Lowest cooling

0650 0 No extended fan

0660 0 No extended fan

off time for compressor

setpoint.

operation after call for heat ends

operation after call for cool ends

0, 2, 3, 4 Minimum number

40 to 89 Temperature range

51 to 99 Temperature range

of minutes compressor is off between calls for compressor

(1°F increments) of heating setpoint.

(1°F increments) of cooling setpoint.

format

90 Fan operation is

extended 90 seconds after call for heat ends.

extended 90 seconds after call for cool ends.

—

Shown in 1/2 °C.

—

Not shown if fan operation is set to fossil fuel or in Cool Only Systems

Not shown in Heat Only Systems.

Select

Keypad Lockout

Temperature Control in Heat

Temperature Control in Cool

Temperature Display Offset

Reset Thermostat

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 6. Advanced Settings Menu. (Continued)

Installer

Setup

Number

0670 0 Unlocked keypad 1, 2 1— p a r t i a l l y l o c k e d

0680 2 Standard

0690 2 Standard

0700 0 No difference in

0710 0 No thermostat reset. 1 Resets all Installer

Factory Setting Other Choices

k e y p a d 2—fully locked keypad

temperature control in heating

temperature control in cooling

displayed temperature and actual room temperature

1, 3 1—less aggressive

-3, -2, -1, 0, 1, 2, 3

temperature control (could cause temperature u n d e r s h o o t ) 3—more aggressive temperature control (could cause temperature overshoot)

°

F (-1.5°C )

-3

- 2 ° F ( - 1 ° C )

- 1 ° F ( - . 5 ° C ) 0 F ( 0 . ° C ) 1 ° F ( . 5 ° C ) 2 ° F ( 1 ° C ) 3°F (1.5°C)

Setup Options to default values and resets schedule to default setting.

CommentsOption Description Options Description

Unlocked—all functions are available. Partially locked— only temperature up and down keys and ability to enter and modify Installer Setup mode are a va i l a b l e. Fully locked—only ability to enter and modify Installer Setup mode are available.

Applies to recovery ramp and use of auxiliary heat during recovery.

Choose 1 if getting temperature overshoot.

Choose 3 if getting temperature undershoot.

Applies to recovery ramp.

Choose 1 if getting temperature overshoot.

Choose 3 if getting temperature undershoot.

—

Only calendar settings and time are retained.

17 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

SYSTEM CHECKOUT

Installer System Test

The Installer System Test mode is used to test the HVAC system(s). See Table 7. While in System Test mode, minimum off -time for compressors is bypassed.

The Installer Test is part of the Installer Setup options. Entering the Installer Setup screen and pressing the down arrow key to bring up the test selection(s) accesses it quickly. See Fig. 22.

Table 7. System Test(s).

Select

Installer Test Cool

Installer Test Fan

Installer Test Heat

Installer Test Em Ht

Installer

Setup

Number

Test 1 0 Cool is off 1,2 0—cool off

Test 2 0 Fan is off 1 0— f a n o f f

Test 3 0 Heat is off 1-3 0— h e a t o f f

Test 4 0 Emergency heat is

Factory Setting Other Choices

off

CAUTION

Equipment Damage Hazard. Minimum compressor off-time is bypassed during Installer System Test.

Avoid cycling compressor quickly.

CommentsOptions Description Options Description

1—cool stage 1

tu rns on 2—cool stages 1 and 2 on

1—fan turns on

1—stage 1 heat

o n 2—stages 1 and 2 h e a t o n 3—stages 1, 2 and 3 (Aux Ht) on

1 0—emergency

heat off 1—emergency heat on

System selection determines which tests are available and the number of stages shown.

Available only if heat pump with auxiliary heat is selected.

69-1706 18

ADVANCED FEATURES

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Outdoor or Indoor Temperature Sensor

Allow outdoor or indoor temperature sensor to absorb the air for a minimum of five minutes before taking a reading. See the Sensor instructions for more 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 thermostat 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 is controlling back up heat in Installer Setup Number

0210.

4. Outdoor Temperature Sensor for Control Option is automatically chosen in Installer Setup

Number 0340 (0340 is not shown).

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 thermostat 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 thermostat calls for heat.

OPERATION IN EMERGENCY HEAT MODE

The balance point (outside) temperature is not used in the Emergency heat mode. When the thermostat is moved to the Emergency Heat position, the compressor is locked out. The first stage of heat is whatever is connected to the E terminal. The second stage of heat is what is connected to the Aux. terminal. Often there is only one source of non-compressor heat and the E terminal is jumped to the Aux. 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. 24.

COMPRESSOR ONLY

50

BOTH COMPRESSOR AND

AUXILIARY HEAT

35

OUTDOOR TEMPERATURE

Fig. 24. Heat Pump Operation with Lockout

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

AUXILIARY ONLY

Temperatures Set.

AUXILIARY LOCKOUT TEMPERATURE

COMPRESSOR LOCKOUT TEMPERATURE

M19950

Operation in the Emergency Heat Mode

Once the thermostat 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 E terminal. The second stage of heat is connected to the Aux. 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 thermostat keeps the air conditioner running for up to 3 temperature setpoint. It does this while trying to achieve the desired humidity setpoint and balancing that with the temperature setpoint.

°

F below the

19 69-1706

TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

TROUBLESHOOTING (SEE TABLE 8)

Table 8. Troubleshooting.

Symptom Possible Cause Action

Display does not come on. Thermostat is not being

Temperature settings do not change.

powered.

The upper or lower temperature limits were reached.

The keypad is fully locked. Check Installer Setup Number 0670 to

Heating or cooling does not come on.

Thermostat is calling for Heat (Heat on) or Cool (Cool on) but no heating or cooling is running.

Thermostat does not respond when touch areas are pressed.

Thermostat minimum off-time is activated.

System selection is not set to Heat or Cool.

O/B terminal is not set correctly (Heat Pumps only).

System type Selection is incorrect.

Heating or cooling equipment is not operating.

The keypad is locked. Check Installer Setup Number 0670 to

Check for 24 Vac between C and Rc. Check that AAA batteries are installed correctly and are good.

Check temperature setpoints. Check Installer Setup Numbers 0600 and 0610; modify as needed.

change keypad locked options.

Wait up to five minutes for the system to respond.

Set system Selection to correct position.

Check Installer Setup Number 0190 and set correctly.

Check Installer Setup Number 0170 and make sure correct System type is chosen.

Check wiring. Check Installer Setup Number 0170 and make sure correct system type is chosen. Verify operation of equipment in System Test mode.

change keypad locked options.

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario

69-1706 G.H. 01-04 www.honeywell.com/yourhome

M1V 4Z9