Honeywell CT3500 Programmable Thermostat User Guide

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Honeywell CT3500/CT3595  

PROGRAMMABLE THERMOSTAT  

OWNER’S 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 español, llame al 1-800-468-1502.  

Pour obtenir ce ode demploi en français, 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 .......................................................................................................................................  

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Step 6. Set Fan Operation Switch ............................................................................................................................. 10  

Step 7. Mount the Thermostat ................................................................................................................................... 11  

Step 8. Customize Your Thermostat .......................................................................................................................... 11  

Step 9. Set the Clock ................................................................................................................................................. 13  

Step 10. Programming .............................................................................................................................................. 14  

Step 11. Operating Your Thermostat ......................................................................................................................... 17  

Step 12. Set the Fan and System Switches .............................................................................................................. 18  

If You Have a Problem ............................................................................................................................................... 19  

Smart Response™ Technology ................................................................................................................................. 21  

Wiring Diagrams ........................................................................................................................................................ 22  

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•All Rights Reserved  

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Name	Honeywell CT3500 Programmable Thermostat User Guide
Make	Honeywell
Language	English
Filetype	PDF (Download)
File size	0.35 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• Honeywell

Honeywell CT3500 Programmable Thermostat User Guide Overview

Summary of Contents

• Page 1: Honeywell CT3500/CT3595 programmable thermostat owner’s guide 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
• Page 2: Total comfort temperature management with Smart Response™ Technology. Congratulations on purchasing your new Honeywell thermostat. Keeps you comfortable by automatically calculating when the furnace or air conditioning should operate. Saves energy and money by adjusting the temperature when you leave home or go to sleep. Provides ultimate comfort and convenience with preprogrammed settings. This manual answers questions as you become familiar with your Honeywell thermostat. Read these instructions carefully to avoid damage or hazardous conditions. If replacing a control that contains mercury, do not dispose of it in the trash. Contact local waste management for recycling and proper disposal instructions. Typical location of a mercury switch in a thermostat.
• Page 3: Digital display Raises temperature setting Set current day/time Lowers temperature setting Displays current heat/cool temperature setting Run program Thermostat operating mode Program periods: wake/leave/return/sleep Hold temp sets a hold temperature and activates vacation hold feature System switch selects heat/off/cool
• Page 4: 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 the temperature displayed is the current set temperature. Shows current day or days being programmed. Shows the temperature displayed is the current room temperature. Shows current program period or period being programmed. Shows the batteries are low and must be replaced. Shows current system switch position heat/off/cool.
• Page 5: Prepare for installation. Check the compatibility chart to ensure the thermostat is compatible with your system. Table 1 outlines the compatibility with CT3500/CT3595 for various system types. Gas systems, oil-fired boilers, and electric systems have specific compatibility notes. Millivolt systems must be heating only and are not compatible with any 120/240 volt system. Package contents include the thermostat, wiring labels, wallplate, batteries, screws, anchors, and owner's manual. Tools required for installation are a screwdriver and a drill.
• Page 6: Step 2: Remove old thermostat Test your heating and cooling systems to make sure they work properly. Turn off power to the system at the furnace or the fuse/circuit breaker panel. Carefully unpack your new thermostat and wallplate. Remove the cover from the old thermostat. Loosen the screw or screws holding the thermostat to the wallplate and lift the thermostat away. Disconnect the wires from the old thermostat and attach the enclosed labels with the old terminal designation. Read this section if you are replacing specific types of thermostats. If you are replacing a Honeywell Chronotherm® Thermostat, do not allow the C or C1 clock terminals to touch. If there are six or more wires, this thermostat is not compatible with multistage systems.
• Page 7: Replacing a thermostat that has three wires is applicable for heating only systems that can operate the fan using the fan ON switch. Some hot water (zoned) heating systems with three wires require an isolating relay for compatibility. To mount the thermostat wallplate, separate it from the thermostat and position it on the wall. Mark the two mounting holes for drilling. Drill holes in the wall based on the material, using anchors for support. Reposition the wallplate, pull the wires through the opening, and insert mounting screws. Leveling the wallplate is optional, as the thermostat functions properly even if not level. Tighten the mounting screws to secure the wallplate.
• Page 8: Step 4. Wire wallplate terminals 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. Match the letter of your old thermostat wire with the corresponding terminal letter on your new thermostat. 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. Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation.
• Page 9: Terminal designations on old and new thermostats include R, Rc, W, Y, G, and O. Power connections are indicated for cooling and heating. Do not connect both O and B when wiring to a single stage heat pump. If both RH and R terminals are present, remove the jumper and connect accordingly. Batteries must be installed for programming and operation of the thermostat. Three AA alkaline batteries are included with the thermostat. Install the batteries with positive terminals pointing up. Follow the installation instructions carefully. Ensure proper connections to avoid issues with the heating/cooling system. Refer to the manual for detailed wiring instructions.
• Page 10: 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. 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. 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. If you insert new batteries within 20 to 30 seconds of removing the old batteries, the system retains the current time and day. 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. The thermostat fan operation switch, labeled FUEL SWITCH is factory set in the F position. 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.
• Page 11: Step 7. Mount the thermostat Engage tabs at top of thermostat and wallplate. Press lower edge of case to latch. Step 8. Customize your thermostat Your Honeywell thermostat comes preset to the most commonly used settings. You can change any or all of these settings. Always press the keys with your fingertip or a similar blunt tool. Sharp instruments like pens and pencil points can damage the keyboard. You now can change any of these settings.
• Page 12: System type options are gravity or steam system, hot water high efficiency furnace, gas or oil forced air furnace, and electric furnace. To change your system type, press until the display shows your furnace or boiler type. Smart Response technology options include Smart Response technology on or off. To turn Smart Response technology on or off, press once. Temperature format options are Fahrenheit or Celsius. To change temperature format, press once. Press Time to move to the next feature or return to the main display. See Smart Response technology for information about this feature. Run Program is part of the process for changing settings. Feature numbers are used to identify specific settings.
• Page 13: Time format options are: — 0 = 12-hour clock (preset). — 1 = 24-hour clock. To change time format: Press once. Factory set function (Feature Number 37) Do not change this setting. Set current day and time. On initial power-up, the screen flashes 1:00 pm until you press a key. Press to set current day. Press until screen shows current day. Press time increments to set current time. Tapping the will advance the time in one hour.
• Page 14: Step 10. Programming The keyboard is located behind the thermostat cover. The three most frequently used keys are near the display. Pressing 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. Leave — The program period you can set for an energy-saving temperature while you are away. Return — The program period when you want the house at a comfortable temperature for activities before bedtime. Sleep — The program period you can set for an energy-saving temperature while you are sleeping. Table 3 can be helpful when planning your schedule of time and temperature settings.
• Page 15: Personal programming table Default setting Weekday (Mon-Fri) Saturday (Sat) Sunday (Sun) Your heating setpoints cannot be higher than 90°F (32°C) or lower than 40°F (4.5°C). Your cooling setpoints cannot be higher than 99°F (37°C) or lower than 45°F (7°C). Program weekdays Start by programming the wake time and temperature for weekdays. Program times are in 15 minute intervals.
• Page 16: The setpoint temperature range is 40°F to 90°F for heating and 45°F to 99°F for cooling. Press to switch between heating and cooling setpoints. Program times are the same for heating and cooling. Press or until the display shows the desired temperature setpoint. Repeat these steps for each time period. Program Saturday and Sunday by repeating each step in Program Weekdays. Press when the entire week is programmed. Wake cannot be cleared. Press for the program period you want to clear. Press and hold for approximately 3 seconds until the time and temperature clear.
• Page 17: Operating your thermostat involves several key functions. Change temperature setting until the next program period allows for a temporary adjustment. The temporary temperature setting is displayed for about 3 seconds before reverting to the room temperature. The setting cancels when the next program period starts or when you press the run program button. To change the temperature setting indefinitely, move the system switch to the desired position (heat or cool). Press the hold temperature button to change your setting if desired. To cancel the hold, press the run program button. For a vacation hold, press the hold temperature button twice to set the desired temperature setpoint. You can designate the number of days for the vacation hold (1 through 255). Select the program period when you want the program to restart. If the vacation hold needs to be canceled before the designated time, press the run program button.
• Page 18: Set the fan switch to control air circulation. Fan On allows continuous operation for improved air circulation. Fan Auto is the normal setting for most homes, where the equipment controls fan operation. Set the system switch after adjusting the fan. Heat mode allows the thermostat to control the heating system. Off mode turns off both heating and air conditioning systems. Cool mode allows the thermostat to control the air conditioning system.
• Page 19: If you have a problem Table 4. Solution Guide Display does not appear. Make sure the batteries are installed correctly. Make sure the thermostat is mounted and latched on the wallplate. Temperature settings will not change. Make sure the temperature setpoints are: 40 to 90°F for heating and 45 to 99°F for cooling. Heating does not come on. 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.
• Page 20: Solution Guide Cooling does not come on. 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. Wait five minutes for the system to respond. System on indicator is lit, but no warm or cool air is coming from the registers. If no hot or cool air is coming from the registers, refer to Heating does not come on or Cooling does not come on. Display flashes during programming. Temperature setting limit has been reached. Temperature changes occur at the wrong times.
• Page 21: Smart Response technology calculates the correct time to turn on your heating or cooling system. It considers air temperature, wall temperature, and the desired comfort temperature time. When activated, the thermostat displays In Recovery, changes the setpoint, and turns on the system. The thermostat learns from experience and adjusts the recovery start time based on previous performance. It takes a few days after installation for the thermostat to adapt to local weather, lifestyle, home construction, and heating/cooling system. Smart Response technology can be turned off by selecting Conventional Recovery. The thermostat uses the same scheme to return to lower comfort temperature during the cooling season. Recovery periods are indicated for both comfort and energy savings modes. If In Recovery is displayed, pressing a button will show the comfort setpoint. The document includes a reference to customizing the thermostat settings.
• Page 22: Wiring diagrams 4-wire heat/cool 2-wire heat-only Power supply. Provide disconnect means and overload protection as required. 4-wire single-stage heat pump 3-wire heat only with fan Use either O or B for heat pump changeover. Using a jumper wire (not supplied) connect W to Y.
• Page 23: 5-wire heat/cool with damper (jumper intact) 5-wire heat/cool (jumper removed) Power supply. Provide disconnect means and overload protection as required. This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations.
• Page 24: Limited one-year warranty Honeywell warrants this product, excluding battery, to be free from defects in workmanship or materials for a period of one year from the date of purchase. If the product is defective, package it carefully along with proof of purchase and a short description of the malfunction. Return options include mailing it to Honeywell or returning it to the retailer. This warranty does not cover removal or reinstallation costs. Honeywell's sole responsibility is to repair or replace the product within the stated terms. Honeywell shall not be liable for any loss or damage, including incidental or consequential damages. This warranty is the only express warranty Honeywell makes on this product. The duration of any implied warranties is limited to the one-year duration of this warranty. This warranty gives you specific legal rights, which may vary from state to state. For questions concerning this warranty, contact Honeywell's Customer Relations Center.