Honeywell CT3500/CT3595

PROGRAMMABLE THERMOSTAT

OWNERS GUIDE

Weekday, Saturday and Sunday Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Wallplate Model CT3500/CT3595 Para pedir estas instrucciones en espaol, llame al 1-800-468-1502. Pour obtenir ce ode demploi en franais, composer le 1-800-468-1502.

Table of Contents

Step 1. Prepare for Installation..... Step 2. Remove Old Thermostat.... Step 3. Mount Thermostat Wallplate.... Step 4. Wire Wallplate Terminals.... Step 5. Install the Batteries..... Step 6. Set Fan Operation Switch..... Step 7. Mount the Thermostat..... Step 8. Customize Your Thermostat.... Step 9. Set the Clock..... Step 10. Programming..... Step 11. Operating Your Thermostat.... Step 12. Set the Fan and System Switches.... If You Have a Problem..... Smart Response Technology.... Wiring Diagrams..... 22
U.S. Registered Trademark Copyright 2001 Honeywell

All Rights Reserved

69-1199-2
Total comfort temperature management with Smart Response Technology.
Congratulations! You made a smart choice by purchasing your new Honeywell thermostat the smart thermostat that; Keeps you comfortable by automatically calculating exactly when the furnace or air conditioning should go on to have the house at the desired comfort temperature by the time you wake up or return home. Saves the maximum amount of energy and money by automatically remembering to adjust the temperature when you leave home or go to sleep. Provides the ultimate in comfort and convenience. It comes preprogrammed. You can use the preprogrammed schedule, or set your own. This manual answers many of the questions that can arise as you become familiar and comfortable with your Honeywell thermostat the state of the art in home comfort controls. Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.

MERCURY NOTICE

If this thermostat 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 this control, or of an old control containing mercury in a sealed tube. If you have questions, call Honeywell Inc. at 1-800-468-1502.
TYPICAL LOCATION OF A MERCURY SWITCH IN A THERMOSTAT

M10614

MERCURY SWITCH

69-11992

DIGITAL DISPLAY SET CURRENT DAY/TIME
SETS CURRENT TIME AND DAY
RAISES TEMPERATURE SETTING LOWERS TEMPERATURE SETTING DISPLAYS CURRENT HEAT/COOL TEMPERATURE SETTING

RUN PROGRAM

RETURNS THERMOSTAT TO NORMAL OPERATING MODE
Run Program Set Current Day/Time

Set Program

Leave Return Sleep

PROGRAM PERIODS

WAKE/LEAVE/RETURN/SLEEP: ENTERS PROGRAMMING MODE

Off Cool

HOLD TEMP
SETS A HOLD TEMPERATURE AND ACTIVATES VACATION HOLD FEATURE.

Hold Temp

Heat/Cool Settings

System

On Auto

SYSTEM SWITCH

SELECTS HEAT/OFF/COOL

FAN SWITCH

SELECTS AUTO/ON

SETS DAY OF THE WEEK

HEAT/COOL SETTING
SWITCHES BETWEEN HEAT SETPOINTS AND COOL SETPOINTS WHILE PROGRAMMING

M18589

SETS TIME FORWARD OR BACK
DISPLAYS EITHER CURRENT TIME OF DAY OR PROGRAM TIMES SHOWS THERMOSTAT IS IN THE SET DAY/TIME MODE SHOWS WHEN THERMOSTAT IS IN THE PROGRAMMING MODE
SHOWS TEMPERATURE SETTING CHANGED FOR THIS PROGRAM PERIOD
SHOWS VACATION HOLD DURATION
SHOWS CURRENT DAY OR DAYS BEING PROGRAMMED
SHOWS CURRENT PROGRAM PERIOD OR PERIOD BEING PROGRAMMED
Set Program Set Day/Time Temporary Setting Hold for AM Em Ht Room Humid Aux Ht Outdoor MonTueWedThuFriSatSun Days WakeLeaveReturnSleep In Recovery Filter Repl Batt System Off Cool Auto Wait Em Heat
SHOWS THE TEMPERATURE DISPLAYED IS THE CURRENT SET TEMPERATURE SHOWS THE TEMPERATURE DISPLAYED IS THE CURRENT ROOM TEMPERATURE SHOWS THE BATTERIES ARE LOW AND MUST BE REPLACED
SHOWS CURRENT SYSTEM SWITCH POSITION HEAT/OFF/COOL SHOWS THAT THERMOSTAT IS "CALLING" FOR HEAT OR COOL
DISPLAYES EITHER ROOM OR SET TEMPERATURES
SHOWS SMART RESPONSE IS OFF CONVENTIONAL RECOVERY IS ON
SHOWS THERMOSTAT IS PROCESSING INFORMATION AND WAITING TO CALL FOR HEAT OR COOL
SHOWS SMART RESPONSE IS CHANGING THE TEMPERATURE TO MEET THE CURRENT PROGRAMS

M18590

STEP 1. PREPARE FOR INSTALLATION
Check Table 1, the compatibility chart, to make sure the thermostat is compatible with your system. If your system is not compatible, call Honeywell Customer Relations Center, toll-free, 1-800-468-1502. Table 1. Compatibility Chart. System Type Gas Standing Pilot Gas Electronic Ignition Gas-fired Boilers Gas 750 Millivolt Heat onlyb Oil-Fired Boilers Oil-Fired Furnace Electric Furnace Electric Air Conditioning Baseboard Electric (120/240 line volt)c Single Stage Heat Pump Multistage Heat Pumps/Multistage Equipment
Compatibility with CT3500/CT3595 Yes Yes Yesa Yes Yesa Yes Yes Yes No Yes No
Compatible with 2-wire Honeywell and Taco zone valves. Not compatible with 3-wire zone valves or 2-wire White Rodgers no. 1361 zone valves. b Millivolt system must be heating only. c Not compatible with any 120/240 volt system.

Package Contents

Thermostat Wiring labels Wallplate 3 Energizer AA batteries Screws and anchors Owners manual

Tools Required

Screwdriver Drill 5 69-11992
STEP 2. REMOVE OLD THERMOSTAT
Test your heating and cooling systems to make sure they work properly. If either system does not work, contact your local heating/air-conditioning dealer. To avoid compressor damage, do not operate the cooling system when outdoor temperature is below 50F (10C). Turn off power to the system at the furnace or the fuse/circuit breaker panel. Carefully unpack your new thermostat and wallplate. Save package of screws, instructions, and receipt. Remove the cover from the old thermostat. If the cover does not snap off when pulled firmly from the bottom, check for a screw or screws used to lock on the cover. Loosen the screw or screws holding the thermostat to the wallplate and lift the thermostat away. Disconnect the wires from the old thermostat. As you disconnect each wire, attach the enclosed labels with the old terminal designation. If there are only two wires, they do not need to be labeled. Wrap the wires around a pencil as shown to keep them from falling back into the wall.

Special Installations

Read this section if you are replacing: Clock thermostat with separate wires for the clock. Thermostat with six or more wires connected to it. Thermostat in a heating only system with three wires.
WIRES THROUGH WALL OPENING
Replacing a Clock Thermostat that has C or C1 Clock Terminals
If you are replacing a Honeywell Chronotherm Thermostat, you may find one or two wires going to the C or C1 clock terminals on the Chronotherm wiring wallplate. Do not allow them to touch, or you can damage the transformer. Disconnect the wires and wrap them separately using electrical tape. Do not wrap them together. Place the wires where they will not interfere with the operation of the new thermostat. Record the colors and terminal designation labels of the remaining wires.
Replacing a Thermostat that has Six or More Wires
If there are six or more wires (excluding clock wires attached to terminals), you probably have a variation of a multistage heat pump or other multistage system. This thermostat is not compatible with multistage systems, so return the product to the place of purchase. For information about which programmable thermostats will work with your system, call Honeywell Customer Relations Center, at 1-800-468-1502.
Replacing a Thermostat that has Three Wires
If you have three wires for a heating only system and can operate the fan using the fan ON switch this thermostat works with your system. However, some hot water (zoned) heating systems also have three wires. Your thermostat will work only if you install an isolating relay on these systems. For details, call your local heating and/or cooling contractor.
STEP 3. MOUNT THERMOSTAT WALLPLATE
Separate the wallplate from the thermostat by placing your thumb or fingers between the bottom of the wallplate and the thermostat, and pulling the wallplate up and away from the thermostat. See illustration at right. Position the wallplate on the wall. Level the wallplate for appearance if desired. Use a pencil to mark the two mounting holes that best fit the application.

M16427

Remove the wallplate from the wall. Drill two 3/16 in. holes in wall (if drywall) as shown. For materials such as plaster or wood, drill 7/32 in. holes where marked. Gently, tap the (provided) anchors into the drilled holes until they are flush with the wall. Reposition the wallplate over the holes. Pull the wires through the wiring opening. Loosely insert mounting screws into each of the holes Level the wallplate if desired. Thermostat functions properly when not level. Tighten mounting screws.

WALL WIRES THROUGH WALL

WALL ANCHORS (2)
MOUNTING HOLES MOUNTING SCREWS

M15044

STEP 4. WIRE WALLPLATE TERMINALS
IMPORTANT All wiring must comply with local codes and ordinances. If unsure about household wiring procedures, call your local heating/air-conditioning contractor.
Refer to the labels you placed on the wires when you removed the old thermostat (see illustration). Match the letter of your old thermostat wire with the corresponding terminal letter on your new thermostat. Refer to Table 2. Remove the factory-installed jumper connecting terminals R and RC if wires are connected to both of those terminals. For wiring diagrams, if needed, see pp 21-22. Loosen the terminal screws. Slip each wire beneath its matching terminal. Wraparound and straight connections are both acceptable, (see illustration). Tighten the terminals.
FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM). FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM).
Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation.

M16425

Table 2. Terminal Designations on Old and New Thermostats Terminal on Old Thermostat R, RH , 4, V Rc, Ra W, W1, H Y, Y1, M G, F O Bb C,X,B W2, H2 Y2

c c b a

Connect To R Rc W Y G O Bb Do not connect. Do not continue installation. Call 1-800-468-1502. Power Power for cooling Heat Cooling Fan

Description

Changeover in cool. (Single stage heat pump only). Changeover in heat. (Single stage heat pump only). Transformer common Second stage heat. Second stage cool.
If both RH and R terminals are present on existing thermostat, remove jumper and connect Rh to R and R to Rc. Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B. c Tape off end of the wire with electrical tape and push the taped wire back into the wiring hole in the wall.
STEP 5. INSTALL THE BATTERIES

WALLPLATE

IMPORTANT Three AA alkaline batteries are included with the thermostat. Batteries must be installed for programming and operation of the thermostat and the heating/cooling system.

Install the batteries in the wallplate so the positive terminals all point up (see illustration).
INSTALL 3 AA ALKALINE BATTERIES AS SHOWN, POSITIVE (+) TERMINALS TOWARD TOP.

M10622

If the thermostat is already mounted on the wall, remove the thermostat by placing your thumb between the thermostat and wallplate and pulling the thermostat up and away as shown. When the batteries are running low, a REPL BAT message flashes for one to two months before the batteries run out completely. Replace the batteries as soon as possible once the message flashes.
IMPORTANT Although the thermostat has a low battery indicator, replace the batteries once per year to prevent leakage and to prevent the thermostat and heating/cooling system from shutting down due to lack of battery power in the thermostat.
M16424 If you insert new batteries within 20 to 30 seconds of removing the old batteries, the system retains the current time and day. If the display is blank, the batteries are dead or installed incorrectly. You must reset the time and day. Refer to Set the Clock for instructions.
As a precaution when leaving home for longer than a month, change batteries before leaving to prevent the system from shutting down due to lack of power. Always use fresh alkaline batteries. Nonalkaline batteries do not last as long. They also can leak, causing damage to the thermostat and the wall surface. Honeywell recommends Energizer batteries.
STEP 6. SET FAN OPERATION SWITCH
The thermostat fan operation switch, labeled FUEL SWITCH is factory set in the F position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to E. The E setting allows the fan to turn on immediately with the heating or cooling in a system where the G terminal is connected.

FUEL SWITCH

M12676
STEP 7. MOUNT THE THERMOSTAT
A. ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE. B. PRESS LOWER EDGE OF CASE TO LATCH.

M12703

STEP 8. CUSTOMIZE YOUR THERMOSTAT
Your Honeywell thermostat comes preset to the most commonly used settings. The settings are: Gas or oil forced air furnace. Smart Response technology on. Temperature F. 12-hour clock format. You can change any or all of these settings.

IMPORTANT Always press the keys with your fingertip or a similar blunt tool. Sharp instruments like pens and pencil points can damage the keyboard.
Press and hold down , , and , simultaneously until the screen shows. You now can change any of these settings.

FEATURE NUMBER

OPTION

M13330

System Type (Feature Number 4)
System type options are: 1 = Gravity or steam system. 3 = Hot water, high efficiency furnace (90% or better), or single stage heat pump. 6 = Gas or oil forced air furnace (preset). 9 = Electric furnace. To change your system type: Press until display shows your furnace or boiler type. to move to next feature or

Run Program

Press Time
to return to main display.
Smart Response Technology (Feature Number 13)
Smart Response technology options are: 0 = Smart Response technology on (preset). 1 = Smart Response technology off.

M13343

To turn Smart Response technology on or off: Press once.
Press Time to move to next feature or Program to return to main display. NOTE: See Smart Response technology (page 20) for information about this feature.
Temperature Format (Feature Number 14)
Temperature format options are: 0 = F (preset). 1 = C.

M13344

To change temperature format: Press once. to move to next feature or
Time Format (Feature Number 16)
Time format options are: 0 = 12-hour clock (preset). 1 = 24-hour clock.

M13345

To change time format: Press Press once.
Factory Set Function (Feature Number 37)
Do not change this setting.

STEP 9. SET THE CLOCK

Set Current Day and Time
NOTE: Press Press On initial power-up, the screen flashes 1:00 pm until you press a key.

Set Current Day/Time Day

M13346
. until screen shows current day. or. until screen shows current time. (Tapping the

Set Current Day/Time

Press time increments). Press
will advance the time in one hour

STEP 10. PROGRAMMING

The keyboard is located behind the thermostat cover. The three most frequently used keys are near the display. displays the current temperature settings. Pressing the and keys change the temperature. The Pressing thermostat displays day, time, program period, temperature and system settings. There is an individual key for each of the four program periods: Wake The program period when you want the house at a comfortable temperature when you get up and while you get ready for work or school. (This is a higher temperature during the heating season and a lower temperature during the cooling season). Leave The program period you can set for an energy-saving temperature while you are away at work or school. (This is a lower temperature during the heating season and a higher temperature during the cooling season). Return The program period when you want the house at a comfortable temperature for activities before bedtime. (This is a higher temperature during the heating season and a lower temperature during the cooling season). Sleep The program period you can set for an energy-saving temperature while you sleeping. (This is a lower temperature during the heating season and a higher temperature during the cooling season). Table 3 can be helpful when planning your schedule of time and temperature settings. The thermostat preprogrammed settings are shown in parentheses ( ).

Table 3. Personal Programming Table. Period Wake Default Setting Time (6:00AM) Heata (70F/21C) Coolb (78F/25.5C) Leave Time (8:00AM) Heata (62F/16.5C) Coolb (85F/29.5C) Return Time (6:00PM) Heata (70F/21C) Coolb (78F/25.5C) Sleep Time (10:00PM) Heata (62F/16.5C) Coolb (82F/28C)

Weekday (Mon-Fri)

Saturday (Sat)

Sunday (Sun)

Your heating setpoints cannot be higher than 90F (32C) or lower than 40F (4.5C). Your cooling setpoints cannot be higher than 99F (37C) or lower than 45F (7C).

Program Weekdays

Start by programming the wake time and temperature for weekdays. Press and release Press

Day Wake

until (Mon-Fri) displays.
Press Time or key until the desired time shows in the display. NOTE: Program times are in 15 minute intervals. For example, 8:00, 8:15, 8:30. Press or key until the desired wake temperature displays. 15 69-11992
The setpoint temperature range is 40F to 90F (4.5C to 32C) for heating and 45F to 99F (7C to 37C) for cooling. Press Settings to switch between heating and cooling setpoints. NOTE: Program times are the same for heating and cooling. Press Press or

Leave Heat/Cool

until the display shows the desired temperature setpoint. ,

Return

and repeat these steps for each time period. Your weekday is now programmed.
Program Saturday and Sunday
Repeat each step in Program Weekdays for Saturday and Sunday. Press
when the entire week is programmed.

Clear a Program Period

NOTE: Press Press Wake cannot be cleared.
for the program period you want to clear.
until the desired day displays (Mon-Fri Sat; Sun).
Press and hold the , , or for approximately 3 seconds until the time and temperature clear. Repeat the above steps for each period to be cleared. Press
STEP 11. OPERATING YOUR THERMOSTAT
Change Temperature Setting Until the Next Program Period (Temporary Change)
Press or until the screen shows the desired temperature setting. NOTE: The temporary temperature setting is displayed for about 3 seconds and then the room temperature is displayed. Temporary appears in the display. The setting cancels when the next program period starts or when you press

Change Temperature Setting Indefinitely (Hold)
Move the System switch to the desired position (Heat or Cool). Press then or to change your setting if desired. (The display changes from showing the setpoint temperature to room temperature after approximately three seconds). To cancel Hold press

Run Program Hold Temp

Change the Temperature Setting Until a Designated Day and Period (Vacation Hold)

Press Press

twice. until the display shows the desired temperature setpoint. until the desired number of days that you will be away (1 through 255) is displayed. ,

Press Time Press NOTE:

to select the program period when you want the program to restart.
If the Vacation Hold needs to be cancelled before the designated time, press gram.

to return to the pro-

STEP 12. SET THE FAN AND SYSTEM SWITCHES
First set the fan switch. Fan On: The fan runs continuously. Use for improved air circulation or for more efficient central air cleaning. (In a heat-only system, fan runs continuously only if fan relay is connected to the G thermostat terminal). Fan Auto: Normal setting for most homes. The equipment controls the fan operation. Then set the system switch. Heat: The thermostat controls your heating system.

On Fan

On Fan Heat System Off
Off: Both the heating and air conditioning systems are off.

Heat System

Cool: The thermostat controls your air conditioning system.

IF YOU HAVE A PROBLEM

Table 4. Solution Guide. If. Display does not appear. Then Make sure the batteries are installed correctly. Make sure the thermostat is mounted and latched on the wallplate. Mount and latch the thermostat on the wallplate if it is not. Make sure the temperature setpoints are: 40 to 90F (4.5 to 32C) for heating. 45 to 99F (7 to 37C) for cooling. Make sure the heating setpoint is above the room temperature. Make sure the circuit breaker is not tripped, and reset it if necessary. Make sure the power switch at the equipment is in the On position, and set it to On if it is in the Off position. Wait five minutes for the system to respond. Set the system switch to Heat.
Temperature settings will not change (example; cannot set the heating higher or the cooling lower). Heating does not come on.
Table 4. Solution Guide. If. Cooling does not come on. = System on indicator ( = heat, cool) is lit, but no warm or cool air is coming from the registers. Display flashes during programming. Temperature changes occur at the wrong times. Then Make sure the cooling setpoint is below the room temperature. Make sure the circuit breaker is not tripped, and reset it if necessary. Make sure the system switch at the air conditioner is in the On position, and set it to On if it is in the Off position. Wait five minutes for the system to respond. Set the system switch to Cool.

Wait five minutes after seeing the flame or snowflake and check the registers again. If no there is no hot or cool air coming from the registers, refer to Heating does not come on or Cooling does not come on. If all of this has been checked, contact your local heating and cooling contractor. Temperature setting limit has been reached. The heating setting range is 40 to 90F (4.5 to 32C). The cooling setting range is 45 to 99F (7 to 37C). Check the program times for the period in question. Make sure the AM and PM settings are correct. Make sure the current time and day settings are correct. Reprogram any incorrect settings. NOTE: If your thermostat is set for Smart Response technology, the start times occur before your programmed comfort period.
Toll-Free Customer Assistance
Please read and follow the provided instructions for this thermostat. For additional information, go to www.honeywell.com/yourhome or call the Honeywell Customer Relations Center at 1-800-468-1502. The Center hours are Monday through Friday, 7:00AM to 5:30PM Central Time. Before calling, please have the following information available: Thermostat model number. (Located on back of thermostat). Thermostat date code. (Located below model number). Type of heating/cooling system (for example, hot water, warm air, oil, or gas). Location and number of wires connected to the thermostat.
SMART RESPONSE TECHNOLOGY
Your thermostat is actually a small computer. The Smart Response technology calculates the correct time of day to turn on your heating or cooling system. Smart Response technology considers the following information. Air temperature. Wall temperature. The time of day when you want the comfort temperature established. When the thermostat activates Smart Response technology, the thermostat displays In Recovery, changes the setpoint, and turns on the system. Your thermostat learns from experience. Each day it checks how closely it hit the recovery target and then adjusts the next days recovery start time accordingly. It takes a few days after installation for the thermostat to adjust to the local weather, your lifestyle, the construction of your home, and your heating/cooling system. You can turn off Smart Response technology by selecting Conventional Recovery. See Step 8. Customize Your Thermostat.
System Operating in Comfort Mode 68F Recovery Continues

TEMPERATURE

Mon Wake System Heat Room
66F Recovery Begins 64F System Operating in Energy Savings Mode 62F

Mon Sleep System Heat

Heat In Recovery
Mon Sleep System Heat Heat In Recovery
5:00 ENERGY SAVINGS PERIOD

6:30 COMFORT PERIOD

RECOVERY FROM ENERGY SAVINGS TIME
THERMOSTAT USES THE SAME SCHEME TO RETURN TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON. 1 IF In Recovery IS DISPLAYED, PRESS TO SEE THE COMFORT SETPOINT.

M18591

WIRING DIAGRAMS
2-WIRE HEAT-ONLY (JUMPER INTACT)

THERMOSTAT B RC O W Y R G
4-WIRE HEAT/COOL (JUMPER INTACT)
HEATING RELAY OR VALVE COIL

COOLING CONTACTOR COIL

FAN RELAY
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

M10616

M10617
4-WIRE SINGLE-STAGE HEAT PUMP (JUMPER INTACT)

THERMOSTAT B RC O W Y

3-WIRE HEAT ONLY WITH FAN (JUMPER INTACT)
2 COMPRESSOR CONTACTOR FAN RELAY HEAT CHANGEOVER VALVE

M10618

COOL CHANGEOVER VALVE
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. USE EITHER O OR B FOR HEAT PUMP CHANGEOVER. USING A JUMPER WIRE (NOT SUPPLIED) CONNECT W TO Y.

M12739

5-WIRE HEAT/COOL (JUMPER REMOVED)
5-WIRE HEAT/COOL WITH DAMPER (JUMPER INTACT)
HEATING RELAY OR VALVE COIL 1

COOLING CONTACTOR COIL 1

HEAT DAMPER

HEAT RELAY

COMPRESSOR CONTACTOR
COOL DAMPER 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD M10619 PROTECTION AS REQUIRED.

M18738

Notice:
This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, CRC c. 1374.
Limited One-Year 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. If, at any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywells option) within a reasonable period of time. If the product is defective, (i) return it, with a bill of sale or other dated proof of purchase, to the retailer from which you purchased it, or (ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of the malfunction, and mail it, postage prepaid, to the following address: Honeywell Inc. USA Honeywell Canada: Dock 4 MN10-3860 Honeywell Limited/Honeywell Limite 1885 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422-3992 Scarborough, Ontario M1V 4Z9 This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer. Honeywells sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may have other rights which vary from state to state. If you have any questions concerning this warranty, please write our Customer Relations Center, Honeywell Inc., 1885 Douglas Dr. N., Golden Valley, MN 55422-3992, or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products ON30 Honeywell Limited/Honeywell Limite, 155 Gordon Baker Road, North York, Ontario M2H 3N7.

Home and Building Control Home and Building Control
Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limite 35 Dynamic Drive Scarborough, Ontario M1V 4Z9
Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.

J.H. Rev. 04-01

www.honeywell.com/yourhome

CT3600, CT3611, CT3500, CT3595, CT8602 Thermostats

OWNERS GUIDE ADDENDUM

FURNACE AIR FILTER, HUMIDIFIER PAD AND ULTRAVIOLET (UV) LAMP TIMERS
Your thermostat has up to three timers that remind you to change or clean your furnace air filter, whole-house humidifier pad or UV (ultraviolet air treatment system) lamp.
Humidifier Pad Timer (Feature No. 44)
Humidifier pad timer options: 0 = off 1 = 90 days 2 = 180 days 3 = 365 days

M20246

Customize Your Timers (See Owners Guide for Instructions on Entering Customize Mode)
Furnace Air Filter Timer (Feature No. 43)
Filter timer options: 0 = off 1 = 30 days 2 = 90 days (preset) 3 = 180 days 4 = 365 days
To change your humidifier pad timer: Press until display shows the desired number of days. Press Time to move to next feature or press Run Program to return to main display. NOTE: The humidifier pad time is based on calendar days. See your humidifier instructions for complete details on replacing and/or cleaning your humidifier pad.
Ultraviolet (UV) Lamp Timer (Feature No. 45)
UV lamp timer options: 0 = off (preset) 1 = 365 days

OPTION

M20245 M20247

FEATURE NUMBER

To change your filter timer: Press until display shows the desired number of days. Press Time to move to next feature or press Run Program to return to main display. NOTE: The filter time is based on calendar days.
To change your UV lamp timer: Press until display shows the desired number of days. Press Time to move to next feature or press Run Program to return to main display. NOTE: The UV lamp time is based on calendar days. See your UV lamp instructions for complete details on replacing your UV lamps.
U.S. Registered Trademark Copyright 2002 Honeywell

All Rights Reserved

69-1583-1
CT3600, CT3611, CT3500, CT3595, CT8602 THERMOSTATS
View or Reset Timer Settings
When the thermostat activates a timer, the thermostat flashes Filter until the timer resets. 1. Reset the timer by pressing the i key until the expired timer is displayed.
Press the time key to reset the timer.

Filter

M20244
Press the Run Program key.

M20243

NOTE: You 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. For complete instructions on replacing or cleaning your furnace filter, humidifier pad or UV lamp, see the product owners manuals. Contact your local contractor or visit www.honeywell.com/yourhome.
Automation and Control Solutions
Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limite 35 Dynamic Drive Scarborough, Ontario M1V 4Z9

69-1583-1 G.H. Rev 05-02

Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.
www.honeywell.com/yourhome