Mechanical Thermostats

CT50K, CT51N, CT53K, CT55N Mechanical Thermostats
CT50K, CT51N, CT53K, CT55N Non-Programmable Mechanical Thermostats
INCLUDES INTEGRATED THERMOMETER
SPECIFICATIONS (US & CANADA):
MODEL CT51 & CT7.25 x 9.25 x 19 2.4 0.73

Master Carton

Qty Dim. WxHxD (in.) Carton Wt. (lbs.) Cu. Ft

Retail Package

KEY FEATURES
Easy to install Standard model Precise temperature control Available in heat only and heat/cool models Bimetal temperature sensor Simple, worry-free operation Mercury-free
Qty Dim. WxHxD (in.) Unit Wt. (lbs.) Cu. Ft

x 9.1 x 2.40 0.07

Compatibility Chart
24-Volt Heating and Air Conditioning Systems: Single Stage Heating and Cooling Multistage Heating and Cooling Heat Pump without Auxiliary Heat
No No No No 24V No No Yes No Yes Yes No Yes
Yes No Yes No 24V No Yes No No Yes Yes No Yes
No No No No 750mV No No Yes No No No Yes No

MODELS

CT50K Heat Only CT51N Heat/Cool CT53K Heat Only (Millivolt) CT55N Heat/Cool (Horizontal)
Heat Pump with Auxiliary Heat Gas Fireplace Electric Baseboard Heat (120-240 Volts) Central Air Conditioning Heating Only Cooling Only Hot Water Steam or Gravity 750 Millivolt Furnace (Warm Air)

US/YCT50K1006

US/YCT51N1008

US/YCT53K1003

CANADA/YCT50K1014

CANADA/YCT51N1016

CANADA/YCT55N1004
Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley, MN 55422-3992 800-468-1502 yourhome.honeywell.com
67-5167 June Honeywell International Inc.

Step 1: Choose your thermostat type
Programmable Makes the most efcient use of your system by automatically adjusting the set temperature throughout the day. You let the thermostat know your preferred temperature at different times of the day and night, then forget about it the thermostat does the work. Best for people on the go or those seeking the most efcient energy savings.
See Step 3 for different programmable thermostat options.

What To Look For

All thermostats share one common feature a way to set the temperature. After that, every thermostat is different in terms of accuracy, reliability, number of features, display size and more. Here are a few features you should consider when choosing your thermostat.

Thermostats

Be Condent With Honeywell
Honeywell has been inventing and perfecting thermostats since 1885 and is the number one choice of homeowners and contractors. You can count on Honeywell products for superior design, engineering and efciency.
Digital Non-Programmable Non-programmable thermostat with a digital readout. Best for people who prefer manually controlled settings with the convenience of an easy-to-read LCD display. Mechanical/Manual Control the temperature setting manually. Best for people who are home often and prefer a xed temperature.
Menu-Driven Programming. Some Honeywell programmable thermostats can be difcult to program, but menudriven programming guides you through the process much like using an ATM. Armchair Programming. Some Honeywell thermostats can be removed from the wall for programming, then replaced in a snap. 4 Programmable Periods Per Day. When choosing a Honeywell programmable model, make sure it allows settings for wake, leave, return and sleep to provide you with a full day of energy savings.

Here To Help

If you have any questions about Honeywell thermostats, call our toll-free consumer hotline at 1-800-468-1502 or visit yourhome.honeywell.com.
Step 2: Identify your heating/cooling system
Use the compatibility charts listed with each thermostat on the back of this brochure to ensure that your thermostat choice matches your heating/cooling system. Central Heat or Central Heat & Air The most common system. Can be 24V gas or oil, hot water or electric. Heat Pump Heating and air conditioning combined into one unit. Can be single- or multi-stage. Fireplace/Floor/Wall Furnace Millivolt or 24V heating systems. Electric Baseboard Electric strip heaters or line voltage baseboard heating systems.
IMPORTANT: Thermostats are designed to work with specic heating/cooling systems, so its essential that you know your system type to avoid purchasing the wrong style.
How To Select The Right Honeywell Thermostat For Your Comfort Zone
Whether your current thermostat simply needs replacement or youre upgrading for better energy efciency, Honeywell has the right thermostat for you. For more than a century, homeowners have been depending upon Honeywell home comfort innovations. If you dont see a thermostat you want or need more information, just visit yourhome.honeywell.com or call 1-800-468-1502.
Easy-To-Read Displays. An easy-to-view dial or a backlit screen makes using the thermostat a pleasure. Many Honeywell models show both the set and current temperature, and some models also display the current time.
+/- 1 F Temperature Control. Some thermostats can vary more than six degrees. For true comfort, look for a Honeywell thermostat with precise temperature control.
ENERGY STAR Rated. Your assurance of energy efciency.
Program Memory. All programming information is saved in the event of a power outage.
Smart Response Technology. Knowing exactly how to plan your programming to make sure your home is heated or cooled at the right time can be hit or miss. Honeywell thermostats with Smart Response Technology take the guesswork out of programming to maximize comfort and energy savings
Step 3 For programmable thermostats, select the options that best t your lifestyle
7-Day Ultimate exibility. Set up to four programs per day, every day. Great for people with busy schedules. 5-1-1-Day Adds separate programming for each weekend day to increase exibility. Up to four programs per day. 5-2-Day Perfect for people with a set Monday Friday schedule. Allows up to four programs per day, with separate programming for weekdays and weekends.

How To Install

Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley, MN 55422-3992 800-468-1502 yourhome.honeywell.com
67-5146 August Honeywell International Inc.
A Complete Selection From The Number One Name In Comfort.

Turn off power and remove old thermostat.
Label wires to match coded terminals.
Install backplate and connect wiring.
Mount thermostat on backplate.

PROGRAMMABLE

10-Sq. Inch, backlit Touchscreen Display 7-Day Effortless Menu-Driven Programming 4 programmable periods per day Smart Response Technology Precise temperature control of +/- 1 F Time, day and setting retained in memory Armchair programming Auto changeover
7-Day Effortless Menu-Driven Programming Large, backlit digital display 4 programmable periods per day Smart Response Technology Precise temperature control of +/- 1 F Time, day and setting retained in memory Armchair programming Auto changeover
Includes interchangeable faceplate (Titanium, Charcoal, Taupe) for customizing appearance 4 programmable periods per day Large, easy-to-read backlit display Precise temperature control of +/- 1 F Retains memory in the event of a power outage Early start function
4 programmable periods per day TRIAC silent switching for accurate temperature control High-capacity electronic thermostat (up to 4000W @ 240V) Use with baseboards, convectors and radiant ceilings (2-wire) Compatible with fan-forced heaters
Menu-Driven Programming for weekdays, plus Saturday and Sunday Large, backlit digital display 4 programmable periods per day Smart Response Technology Retains memory in event of power outage Armchair programming
Programming for weekdays, plus weekends 4 weekday programmable periods per day Large, backlit digital display Armchair programming Easy-access battery door Precise temperature control of +/- 1 F Retains memory in the event of a power outage
7-Day Universal Touchscreen RTH8500

Compatibility Chart:

7-Day Universal RTH7500

7-Day Dcor RTH2520

7-Day Programmable RLV450
5-1-1-Day Universal RTH7400

5-2-Day RTH6300

Single Stage Heating and Cooling Multistage Heating and Cooling Heating Only Cooling Only Furnace (Warm Air) Central Air Conditioning Heat Pump without Auxiliary Heat
Heat Pump with Auxiliary Heat Hot Water Steam or Gravity 750 Millivolt Gas Fireplaces Electric Baseboard Heat (120-240 Volts)
Programming for weekdays, plus weekends 4 weekday programmable periods per day Large, easy-to-read display Easy-access battery compartment Precise temperature control of +/-1 F Retains memory in the event of a power outage
4 programmable periods per day TRIAC silent switching for accurate temperature control High-capacity electronic thermostat (up to 3500W @ 240V) Use with electric baseboards (120-240V), convectors and radiant ceilings (2-wire) Compatible with fan-forced heaters

D I G I TA L N O N - P R O G R A M M B L E
Large, backlit digital display Precise temperature control of +/- 1 F Soft-touch keys Retains memory in the event of a power outage Easy to install and use
Includes interchangeable faceplate (Titanium, Charcoal, Taupe) for customizing appearance Large, easy-to-read backlit display Retains memory in the event of a power outage Precise temperature control of +/- 1 F
Large, easy-to-read display Retains memory in the event of a power outage Easy-access battery compartment
Large, backlit digital display Precise temperature control of +/- 1 F Popular round design Available in heat only (CT8775A) and heat/cool (CT8775C) models Also available in heat pump without auxilary heat (CT8775C) models

5-2-Day RTH230

5-2-Day RLV430

Deluxe Digital RTH5100

Digital Dcor RTH1120

Digital RTH110

The Digital Round CT8775
Single Stage Heating and Cooling (CT8775C) Multistage Heating and Cooling Heating Only Cooling Only (CT8775C) Furnace (Warm Air) Central Air Conditioning (CT8775C) Heat Pump without Auxiliary Heat
D I G I TA L N O N - P R O G R A M M A B L E
Easy to install and use Emergency and auxiliary heat light indication Precise temperature control For use only on heat pumps with auxiliary heat
TRIAC silent switching for accurate temperature control High-capacity electronic thermostat (up to 3000W @ 240V) Easy to install and use Use with electric baseboards (120-240V), convectors and radiant ceilings (2-wire) Accurate temperature control +/-.27 F
MECHANICAL NON-PROGRAMMBABLE
Worlds most-popular thermostat Precise temperature control Available in heat only (CT87K) and heat/cool models (CT87N) Available in easy-to-see models Easy to install and use
MECHANICAL NON-PROGRAMMABLE
Standard model Precise temperature control Available in heat only (CT50A) and heat/cool (CT51A) models Also Available in Fireplace/Floor/Wall Furnace (CT53A) models
MECHANICAL NON-PROGRAMMBLE
Economy model Bimetal temperature sensor no leveling required Simple, worry-free operation Available in heat only (CT30A) and heat/cool (CT31A) models Also Available in Fireplace/Floor/Wall Furnace (CT33A) models

Digital RTH3100

Single Stage Heating and Cooling Multistage Heating and Cooling Heating Only Cooling Only Furnace (Warm Air) Central Air Conditioning Heat Pump without Auxiliary Heat Heat Pump with Auxiliary Heat Hot Water Steam or Gravity 750 Millivolt Gas Fireplaces Electric Baseboard Heat (120-240 Volts)

Digital RLV310

The Round CT87K/CT87N

CT50/CT51/ CT53

CT30A/CT31A/ CT33A
Single Stage Heating and Cooling (CT87N) Multistage Heating and Cooling Heating Only Cooling Only (CT87N) Furnace (Warm Air) Central Air Conditioning (CT87N) Heat Pump without Auxiliary Heat (CT87N)
Heat Pump with Auxiliary Heat Hot Water Steam or Gravity 750 Millivolt Gas Fireplaces (24V) Electric Baseboard Heat (120-240 Volts)

Single Stage Heating and Cooling

(CT51A)

Multistage Heating and Cooling Heating Only Cooling Only (CT51A) Furnace (Warm Air) (CT50A and CT51A) Central Air Conditioning (CT51A)
Heat Pump without Auxiliary Heat Heat Pump with Auxiliary Heat Hot Water (CT50A and CT51A) Steam or Gravity 750 Millivolt (CT53A) Gas Fireplaces Electric Baseboard Heat (120-240 Volts)
Single Stage Heating and Cooling (CT31A) Multistage Heating and Cooling Heating Only Cooling Only (CT31A) Furnace (Warm Air) (CT30A and CT31A) Central Air Conditioning (CT31A) Heat Pump without Auxiliary Heat
Heat Pump with Auxiliary Heat Hot Water (CT30A and CT31A) Steam or Gravity 750 Millivolt (CT33A) Gas Fireplaces Electric Baseboard Heat (120-240 Volts)