Honeywell RTH8500 User Manual 2

RTH8500

Touchscreen Programmable Thermostat

Operating Manual

69-2220EF-05

BE CAREFUL! Never use sharp instruments, such as a pencil or pen, to press touchscreen keys. To prevent damage to the thermostat, always press keys with your fingertip.

Note: Remove wallplate from the thermostat and see the label on the back of the thermostat for model number.

M28372

This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Material—special handling may apply, See www.dtsc.ca.gov/hazardouswaste/perchlorate

Need Help?

For assistance with this product please visit http://yourhome.honeywell.com

or call Honeywell Customer Care toll-free at 1-800-468-1502

Read and save these instructions.

US Patent No. 6,595,4 30; 7,114,554; 7,274,972; 7,225,0 54; D520,386 and ot her paten ts pendi ng.

® U.S. Registered Tradem ark.

Table of contents

RTH8500

About your new thermostat

Thermostat features ............................... 2

Programming at a glance ....................... 3

Quick reference to controls .................... 4

Quick reference to status display ........... 5

Appendices

Battery replacement/

Customer assistance ............................ 18

In case of difficulty ................................ 19

Limited warranty ................................... 21

Programming & Operation

Clock setting ........................................... 6

Fan setting .............................................. 7

System setting ........................................ 8

Using program schedules ....................... 9

Program schedule overrides ................ 12

Vacation hold ........................................ 14

Screen cleaning .................................... 15

Furnace filter reminder ......................... 16

Special features .................................... 17

1 69-2220EF—05

This thermostat is ready to go!

Your new thermostat is preprogrammed and ready to go. See page 3 to check settings.

CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible

compressor damage, do not operate cooling system when outdoor

temperature is below 50˚F (10˚C).

Operating Manual

About your new thermostat

Congratulations! You’ve just purchased the world’s most advanced, easy-to-use thermostat. It has been designed to give you many years of reliable service and touchscreen climate control.

Features

• 7-day program schedules maximize comfort and economy.

• Armchair programming: Just pull thermostat from the wall to set schedules.

• One-touch temp control overrides program schedule at any time.

• Precise comfort control keeps temperature within 1°F of the level you set.

• Change/check reminders let you know when to replace filters and batteries.

• Large touchscreen display with backlight is easy to read—even in the dark.

69-2220EF—05 2

RTH8500

About your new thermostat

This thermostat is ready to go!

Your new thermostat is pre-programmed and ready to go. All you have to do is set the

time and day. Then check the settings below and change if needed:

1. Set clock ......................................................................................................... See page 6

2. Select fan setting: Preset to Auto ............................................... To change, see page 7

3. Select system setting: Preset to Heat ........................................ To change, see page 8

4. Program schedules: Preset to energy-saving levels

while you’re at work or asleep (assumes you wake at 6 am, leave at 8 am, return at 6 pm

and go to bed at 10 pm) .......................................................To change, see pages 10-13

ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time, and

manually adjust the temperature (see pages 12-14).

3 69-2220EF—05

Operating Manual

Quick reference to controls

Press day(s) to set program schedule (see page 11)

Press to select fan

operation (see page 7)

Press to select system

type (see page 8)

Press to set program

schedule (see page 11)

Press to override program schedule

MON TUE WED THU FRI SAT SUN

OK TO PICK MULTIPLE DAYS

FAN

Inside

AUTO

SYSTEM

HEAT

SCHED HOLD CLOCK SCREENMORE

6:01

Press to set clock

(see page 6)

(see pages 12-14)

69-2220EF—05 4

Set To

Following Schedule

Press to adjust temperature settings

(see pages 11-14)

Press for more options

(select models only)

M28373

Press to lock keypad for 30 seconds to clean screen

(see page 17)

RTH8500

Quick reference to status display

Current inside temperature Current day of week Temperature setting

WED

FAN

Inside

Fan setting

System setting

AUTO

SYSTEM

HEAT

6:01

Current time

Other display messages:

5 69-2220EF—05

SCHED HOLD CLOCKSCREEN MORE

• Cool On: Cooling system is activated

• Heat On: Heating system is activated

• Aux Heat On: Auxiliary heating system is activated

(heat pump systems only)

Set To

Following Schedule

Recovery

M28374

Program schedule on

(does not display when off)

Smart Response® Technology in effect

(see page 15)

Operating Manual

WED

FAN

AUTO

Inside

Set To

M28375

WED

FAN

AUTO

Inside

Set To

Clock setting

Press CLOCK

6:01

SCHED HOLD CLOCK SCREEN MORE

Adjust time, then press DONE

M28376

6:02

DONE CANCEL

69-2220EF—05 6

To set the current time display, press CLOCK, then press s or t to adjust the time. Press and hold s or t to advance the time more quickly.

Press DONE to save & exit (or press CANCEL to

exit without changing the time).

Note: The real-time clock should never require adjustment since it automatically updates for daylight savings time, and stores all date/time information.

Note: To change the current week day display, see see System Setup in your Installation Guide.

Fan setting

RTH8500

WED

FAN

Inside

AUTO

SYSTEM

HEAT

6:01

SCHED HOLDCLOCK SCREEN MORE

Set To

Following Schedule

M28377

Press FAN to select fan operation, then press DONE.

• On: Fan is always on.

• Auto: Fan runs only when the heating or

cooling system is on.

Press FAN

7 69-2220EF—05

Operating Manual

System setting

WED

FAN

Inside

AUTO

SYSTEM

HEAT

SCHED HOLD CLOCK SCREEN MORE

6:01

Set To

Following Schedule

M28378

Press the SYSTEM button to select, then press DONE.

• Heat: Thermostat controls only the heating

• Cool: Thermostat controls only the cooling

• Auto: Thermostat automatically selects

• Off: Heating and cooling systems are off.

Note: The Auto and Em Heat system settings may not appear, depending on how your thermostat was installed.

69-2220EF—05 8

• Em Heat (only for heat pumps with

system.

heating or cooling depending on the indoor temperature.

auxiliary heat): Thermostat controls Emergency and Auxiliary Heat.

Compressor is locked out.

RTH8500

Save money by setting program schedules

It’s easy to program your system for maximum energy savings. You can program four time

periods each day, with different settings for weekdays and weekends.

WAKE

6:00 am

LEAVE

8:00 am

RETURN

6:00 pm

SLEEP

10:00 pm

9 69-2220EF—05

Set to the time you awaken and the temperature you want during the morning, until you leave for the day.

Set to the time you leave home and the temperature you

want while you are away (usually an energy-saving level).

Set to the time you return home and the temperature you want during the evening, until bedtime.

Set to the time you go to bed and the temperature you want

overnight (usually an energy-saving level).

Operating Manual

Energy saving settings for maximum cost savings

This thermostat is pre-set to use energy saving program settings. We recommend these

settings, since they can reduce your heating/cooling expenses. (See next page to adjust times and temperatures of each time period.)

Cool (Mon-Fri)Heat (Mon-Fri)

Wake

(6:00 am)

Leave

(8:00 am)

Return

(6:00 pm)

Sleep

(10:00 pm)

69-2220EF—05 10

70 62 70 62

78 85

Heat (Sat-Sun)

[Or cancel period]

Cool (Sat-Sun)

[Or cancel period]

To adjust program schedules

WED

Following Schedule

Inside

Set To

6:00

FAN

AUTO

WED

Following Schedule

Inside

Set To

6:00

FAN

AUTO

RTH8500

Press SCHED

SCHED HOLD CLOCK SCREEN MORE

M28379

Press EDIT

1. Press SCHED, then EDIT.

2. Press day buttons (MON-SUN) to select day(s).

3. Press s or t to set Wake time for selected

day(s).

4. Press s or t to set Heat and Cool

DONE WAKE LEAVE RETURN SLEEPEDIT CANCEL

Select day(s) Set heat/cool levels

TUE WED THU FRI SATSUN

MON

OK TO PICK MULTIPLE DAYS

CANCEL PERIOD

DONE WAKE LEAVE RETURN SLEEP CANCEL

Set time for program period to start

11 69-2220EF—05

6:00

M28380

HEAT

COOL

M28381

temperature for this time period.

5. Press other time periods (LEAVE, RETURN, SLEEP) to set time and temperatures for each.

6. Press DONE to save & exit (or press CANCEL to exit without saving changes).

Note: You can press CANCEL PERIOD to eliminate any unwanted time period.

Operating Manual

Program schedule override (temporary)

Adjust temperature

WED

FAN

Inside

AUTO

SYSTEM

HEAT

Hold Temperature

Until

8:00

SCHED HOLD CLOCK SCREEN MORE

Press to set timer

Press CANCEL (or SCHED) to resume program schedule

69-2220EF—05 12

Set To

Heat On

CANCEL

M28382

Press s or t to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period.

The new temperature will be maintained only

until the time you set. When the timer expires,

the program schedule will resume and set the temperature to the level you’ve programmed for the current time period.

To cancel the temporary setting at any time, press CANCEL (or SCHED). The program schedule will resume.

Program schedule override (permanent)

RTH8500

Press HOLD Adjust temperature

Press HOLD to permanently adjust the temperature. This will turn off the program

WED

FAN

Inside

AUTO

SYSTEM

HEAT

13 69-2220EF—05

8:00

Permanent

Hold

SCHED HOLD CLOCK SCREEN MORE

Press CANCEL (or SCHED) to resume program schedule

Set To

Heat On

CANCEL

M28383

schedule.

Whatever temperature you set will be maintained 24 hours a day until you manually change it or press CANCEL (or SCHED) to cancel “Hold” and resume the program schedule.

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