Instruction/ maintenance manual of the product T8665A Honeywell
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1 69-1536–3 USER’S GUIDE T8665A Chronotherm ® IV W ireless Thermostat 69-1536-3.
2 69-1536–3.
3 69-1536–3 CONTENTS USING THIS GUIDE ............................................................................................................... ........................... 5 FEA TURES ...........................................................
4 69-1536–3 Contents (Cont) Using the (Information) Key .............................................................................................. ........................... 23 Display Current Setting ...........................................
5 69-1536–3 USING THIS GUIDE The T8665A is a multi-functional thermostat. This means it can be used in single or multi-zone applications. The following symbols will help you identify the features that apply to your system: – T riple layer of thermostats with the word, zoning, below .
6 69-1536–3 FEA TURES • Adaptive Intelligent Reco very TM Control for comf or t and energy savings. • Customize the program schedule—program your own schedule to fit your needs. • T emporar y schedule o verride—set the ther mostat higher or lower for the current program schedule.
7 69-1536–3 KEYBOARD AND DISPLA Y DESCRIPTION Keyboard The keyboard is located behind the thermostat cover . Three frequently used keys, increase ▲ or decrease ▼ and , are located next to the display . See Fig. 1. Display The thermostat displays important information such as day , time, schedule period, temperature, system and fan operation.
8 69-1536–3 Fig. 1. Thermostat keyboard description. M20146 Time Set Program Run Program Hold Temp Set Current Day/Time Day Heat/Cool Settings Wake Fan System Copy Daylight Time Leave Return Sleep I.
9 69-1536–3 Fig. 2. Example of thermostat display . A u t o System F an O f f A u t o Wake Mon Room AM Recovery Hold for Filter Days On DST C oo l TueWed Thu FriSatSun Leave Return Sleep Set Program.
10 69-1536–3 ADAPTIVE INTELLIGENT RECOVER Y TM CONTROL Y our new thermostat is so smart, it’s almost human. Y ou perceive temperature from a variety of sources, not only from the air in the room, but also from your surrounding walls, windows and furnishings.
11 69-1536–3 After installation or new schedule programming, your thermostat learns from experience. Each day it checks how closely it hit the recovery target (for example, 70 ° at 6:00 AM) and adjusts the next day’s recovery start time accordingly .
12 69-1536–3 Fig. 4. Explanation of Adaptive Intelligent Recovery TM control. At 4:00 AM Recovery Begins At 5:00 AM Recovery Continues At 6:00 AM Recovery Continues At 7:00 AM System Operating in Co.
13 69-1536–3 OPERA TING YOUR THERMOST A T Y our new thermostat saves energy and keeps you comfortable at the same time. By now you may be wondering how to program your thermostat and how to use some more time and energy-saving features.
14 69-1536–3 Setting the System Key Press the System key until the desired system (Heat, Off, Cool, or Auto) displays. Heat: The thermostat controls the heating.
15 69-1536–3 Setting T emporary T emperatures Y ou can override the current schedule period to temporarily change the temperature setting until the next schedule period, or you can change and hold the temperature setting indefinitely .
16 69-1536–3 Press the Run Program key to cancel the temporary temperature setting before the designated time. Run Program M14564 Mon System Fan Heat Auto AM Heat Temporary After selecting a temporary setting, the display reads “T emporary” until canceled.
17 69-1536–3 M14565 System Fan Heat Auto Heat Setting Changing and Holding T emperature Setting Indefinitely 1. Press Hold T emp key once. 2. Press increase ▲ or decrease ▼ to change the tempera- ture setpoint, if desired. NOTE: The display changes from the setpoint to the room temperature after approximately three seconds.
18 69-1536–3 Changing T emperature Setting Until a Designated Day and Period (V acation Hold) Hold Temp Press the T ime or Time key to select the number of vacation days.
19 69-1536–3 Press Wake, Leave, Return or Sleep key to select the period the Hold ends. M14571 System Fan Heat Auto Hold for Heat Days Setting Return 4. Press increase ▲ or decrease ▼ to adjust the tempera- ture setting, if desired. NOTE: Only the heating temperature is used when the System is set to Heat.
20 69-1536–3 5. Press Heat/Cool Settings key to change between heat and cool settings. 6. Press increase ▲ or decrease ▼ to adjust the temperature setting, if desired (for example, if cool is set at 84 ° , cooling equipment operates when the room temperature is above 84 ° F).
21 69-1536–3 Replacing the Batteries This thermostat uses three AA alkaline batteries. Batteries must be installed for programming and operation of the thermostat and heating (cooling system). The batteries are located in the wallplate. See illustration.
22 69-1536–3 2. Remove the thermostat by placing your thumb between the thermostat and wallplate and pulling the thermostat up and away as shown. M16424 If you insert new batteries within 20 to 30 seconds of removing the old batteries, the system retains the current time and day .
23 69-1536–3 Using the (Information) Key The (information) key provides information at your fingertips. The sequence of key presses is: • Current setpoint of mode in use (Heat or Cool). • Setpoint of mode not currently in use. Displaying Current Settings Press key once to check the current temperature setpoint.
24 69-1536–3 Display or Reset Filter T imer Settings 2. Press the T imer ▲ key to reset the timer . 3. Press the Run Program key . Note: Y ou can view the number of days remaining at any time by pressing the i key three or four times. If more than one timer is active, all active timers show sequentially when pressing the i key several times.
25 69-1536–3 SETTING THE CLOCK Setting Current Day and Time On initial power up or after an extended power loss, “1:00 PM” flashes on the display until a key is pressed. 1. Press Set Current Day/T ime key . Press Set Current Day/Time key to show information displayed.
26 69-1536–3 3. Press T ime or Time key until the current time displays. T ap the Set Current Day/Time key to advance the time in one-hour increments. 4. Press Run Program key to return to normal operation. 2. Press Day key until the current day displays.
27 69-1536–3 Daylight Saving T ime NOTE: If the current time is Daylight Saving T ime, press Daylight T ime key to display “DST .” Daylight Time M14583 Set Day/Time AM DST Tue Press Daylight T ime key to set Daylight Saving Time.
28 69-1536–3 PROGRAMMING YOUR THERMOST A T 7-Day Program and Operation Y our thermostat is 7-day programmable. 7-day programming means you can set your thermostat for four periods (W ake, Leave, Return and Sleep) and up to eight temperatures (four Heat and four Cool) for each day of the week.
29 69-1536–3 7-Day Preprogrammed Schedule Y our thermostat is preprogrammed with the schedule shown in T able 1 (same schedule for all days of the week). Y ou may keep this schedule or develop your own. Before starting the programming procedure, use T able 2 to plan your schedule.
30 69-1536–3 Customizing Y our Own 7-Day Schedule T able 2. Y our 7-Day Schedule. WAKE LEAVE RETURN SLEEP SUNDAY TIME FAN AUTO O N H C TIME FAN AUTO O N H C TIME FAN AUTO O N H C TIME FAN AUTO O N H.
31 69-1536–3 About Power Outages… Don’t worry! Y our thermostat retains the schedule (preprogrammed or your own) for the life of the product. The time and day information is retained for a minimum of twenty minutes during a power outage.
32 69-1536–3 1. Press the W ake key . M14586 Set Program Wake System Fan Heat Auto AM Heat Tue Setting Press the W ake key to enter the program mode. Example display shows 6:00 AM on T uesday with Heat set to 70 ° F. M14588 Set Program Mon Wake System Fan Heat Auto AM Heat Setting Day Press Day key to select the day to program.
33 69-1536–3 3. Press T ime or T ime key until the desired W ake time displays. The program times are in fifteen-minute intervals; for example, 8:00, 8:15, 8:30. Press the T ime or Time key to select the time the W ake period will begin. Example display shows the W ake period will begin at 6:30 AM.
34 69-1536–3 5. Press Fan key to modify fan operation. Selecting Auto means the fan runs only when the heating or cooling equipment is operating. Selecting On means the fan runs continuously for the entire schedule period. 6. Press Heat/Cool Settings key to make selections for the opposite system setting (either Heat or Cool).
35 69-1536–3 7. Press increase ▲ or decrease ▼ key until the desired temperature setpoint displays. M14592 Set Program Mon Wake System Fan Heat Auto AM Cool Setting Press increase ▲ or decrease ▼ to select the cooling W ake temperature. Example display shows the cooling Wake period set for 76 ° .
36 69-1536–3 Copying a Day The thermostat must be in the program mode to use the copy feature. Go to step 2 if the thermostat is already in the program mode (set program displays in the upper left corner). 1. Press W ake, Leave, Return or Sleep key to enter program mode.
37 69-1536–3 3. Press Copy key . Press Copy key to copy a day schedule into memory . Example display shows Monday schedule was copied into memory . Day M14595 Mon Wed 4. Press Day key until the day to be copied to is displayed. Copy Press Day key again to select the day to copy to.
38 69-1536–3 6. Repeat steps, as necessary , for all the periods and days desired. 7. Press Run Program key to return to normal operation. 5. Press Copy key . NOTE: “donE” displays for two seconds before the normal display returns. Press the Copy key again to complete the copy command.
39 69-1536–3 2. Press Day key until the desired day displays. Clearing a Program Period The thermostat must be in the program mode to use the clear feature. Go to step 2 if the thermo- stat is already in the program mode (Set Program displays in upper left corner).
40 69-1536–3 Y ou do not have to program a replacement time for the remaining periods; for example, W ake and Sleep. If you clear only the Leave and Return periods for Saturday (or any day), the thermostat remains in the W ake period for all of Saturday until the Sleep period.
41 69-1536–3 TROUBLESHOOTING continued Symptom Possible Cause Action Display does not come on. Thermostat is not being powered. • Check if the batteries are correctly installed. • Check if the thermostat is mounted and latched on the wallplate—mount and latch the thermostat on the wallplate.
42 69-1536–3 T roubleshooting (Cont) Symptom Possible Cause Action Cooling does not come on. System selection is not set to Cool. Cooling setpoint is above room temperature. Check that setpoint is below room temperature. Check if the circuit breaker is tripped—reset the circuit breaker.
43 69-1536–3 WARRANTY Honeywell warrants this product, excluding battery , to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer .
44 69-1536–3 W arranty (Cont) THIS W ARRANTY IS THE ONL Y EXPRESS W ARRANTY HONEYWELL MAKES ON THIS PRODUCT . THE DURA TION OF ANY IMPLIED W ARRANTIES, INCLUDING THE WARRANTIES OF MERCHANT ABILITY AND FITNESS FOR A P ARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURA TION OF THIS W ARRANTY .
45 69-1536–3 CUSTOMER ASSIST ANCE After reading this guide, if you have any questions about the operation of your thermostat, please contact the Honeywell Customer Relations at www .honeywell.com/yourhome or 1-800-468-1502. For service, contact your local heating and cooling contractor .
46 69-1536–3 FCCID: CFS8DL5800ST A T CANADA: 1748A 121 1 1 This device complies with P ar t 15 of the FCC Rules. Operation is subject to the f ollowing two conditions: (1) This de vice may not cause harmful interference, and (2) This device must accept an y interference received, including interf erence that may cause undesired operation.
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69-1536–3 G.H. R e v . 11-02 Printed in U.S.A. Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 www .
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However, one of the most important roles played by the user manual is to help in solving problems with Honeywell T8665A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell T8665A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
