Radio Thermostat CT50 Operation Manual
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Radio Thermostat CT50 Operation Manual

Programmable communicating thermostat
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See also: Installation Manual
Operation Guide CT50
To turn your CT50 ON, press the MODE button on the right side. This
cycles the CT50 through HEAT, COOL, AUTO and OFF modes.
The CT50 programmable communicating
thermostat operates via a high-quality, easy-
to-use touch screen. To program or adjust your
CT50, simply touch your finger firmly to the
screen. The screen will automatically light up and
you will hear a "beep." The screen will respond
differently to different types of touches, so you
may want to experiment by touching it different
ways, finger, fingernail, etc. Do not use a sharp or
metallic device; it will scratch the screen.
Statement of use: 100% Compatible with all popular
residential HVAC systems; 24VAC single, two stage
conventional heating systems (gas/oil/electric), heat
pumps, single stage or with auxiliary heat (electric
or fossil), zoned forced air and zoned hot water (2
or 3 wire), millivolt systems (with a 18-24 AC or DC
source), one or two stage cooling, and hybrid systems.
1014-011-001
top cover
Reset
button
HVAC
selection
switches
Save
Energy
button
RAD IO
Insulation
indicator
1
LIN K
TAR GET TEM P
bottom
cover
DAY
AUT O
PM
F
CO OL
Touch screen
ENGLISH
1
PG
Wire
terminals
Mode
button
Fan
button
MENU
butto
n
PROG
butto
n

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Summary of Contents for Radio Thermostat CT50

  • Page 1 Operation Guide CT50 To turn your CT50 ON, press the MODE button on the right side. This cycles the CT50 through HEAT, COOL, AUTO and OFF modes. The CT50 programmable communicating top cover Reset thermostat operates via a high-quality, easy- button to-use touch screen.

  • Page 2: Home Screen

    HOME Screen Control Screens Before you operate the CT50 please get familiar with these basic control screens. All the CT50 functions are accessed through these screens: HOME, MENU, PROGRAM and MANUAL. The CT50 touch screen technology allows you to select (by touching) an item and change it using the +/- arrows or the time arrows.

  • Page 3: Menu Screen

    MENU Screen The MENU screen is the gateway to many functions or settings of the CT50. It is displayed when you press the MENU button. [See page 10 for details] Set Time Chirp set Filter Timer set Touch this area to set...

  • Page 4: Program Screen

    PROGRAM Screen The PROGRAM screen sets the CT50 control for your home HVAC system. Press PROG for to access it. After that it is displayed when you press the PROG button. [See page 8 for details] Return HOME Set Time Slot...

  • Page 5: Manual Screen

    MANUAL Screen The Manual Screen control screen is where you can make temporary changes to your CT50’s operation. From the Full HOME screen, touch the main temperature display to use this screen. [See page 13 for details] Manual Override Indicator...

  • Page 6: Thermostat Mode

    Make this simple HOME screen the default for your CT50, switch the mode to OFF and hold the PROG button for 12 seconds. This Simple HOME screen gives you limited access to the CT50’s features, only the target temp can be changed.

  • Page 7: Initial Settings

    Initial Settings Press MENU to access the following commands (from HOME screen). Set day of the week Touch the Day of the week area to cycle through the days of the week to select the current day. Set time of day Touch the Time of Day arrows to move the time selection forward or backward until it displays the current time.

  • Page 8: Run Program

    All Days TO CHANGE THE PROGRAM: Make sure the CT50 mode is set to either HEAT or COOL, then press the PROGRAM button. This puts you at the PROGRAM screen [see page 4]. The programmed start time is displayed in the upper left.
  • Page 9 PROGRAM cont. Select the day you want to program. The day of the week starts at SU - Sunday and can be advanced to the day you want to program. Touch the day of the week area to cycle through the days of the week to the desired day. Select the time slot (period) you want to program (MORN, DAY, EVEN, NITE).

  • Page 10: Menu Screen Functions

    CT50 setting and the room temperature required before the heating or cooling system will turn on—from 0.5° to 2.0° F (.25° to 1° C). For example, if SWING is set to 2.0° F and the CT50 is set to 70°F Target Temperature, the heat cycle will start when room temperature drops to 68°F.
  • Page 11 Set - Touch this to change the temperature display scale from o F to o C . FILTER - AIR FILTER ALERT - The CT50 can be programmed to remind you when the HVAC sytem’s air filter needs changing. Touch FILTER. The display will show the usage to date.
  • Page 12 CALIBRATE Your thermostat was accurately calibrated at the factory to ±1° F of actual ambient temperature. You do have the option, however, to change the display temperature to match that of a previous thermostat, or to match another thermostat already in your home. The range of change is from -6°F to +6°F or -3°C to +3°C.

  • Page 13: Manual Screen Functions

    MANUAL Screen Functions The CT50 has 4 manual override commands. The manual screen is accessed by touching the large current temperature display in the middle of the HOME screen. IMPORTANT: The Mode must be in HEAT or COOL to access the manual screen.

  • Page 14: Other Functions

    MORN, DAY and EVEN) and a different target for NITE. EMER (in HEAT PUMP type) If you set your CT50 for HEAT PUMP with auxiliary heat, EMER function is available on the MANUAL screen. If you touch EMER, it displays EMER|ON. Your HEAT PUMP is disabled and auxiliary heat is your sole source of heat.

  • Page 15: Mode Button

    The mode button sets the CT50 to HEAT, COOL, AUTO, or OFF modes. Press it once to step to the next mode. If the CT50 is in OFF and you want to return to the mode you were previously in, touch the OFF indicator on screen.

  • Page 16: Simple Screen

    Hold down the PROGRAM button for 12 seconds to access the limited display screen. Hold down the PROGRAM button for 12 seconds to leave the limited display screen. RESET button The RESET button re-boots the CT50 processor. It does not effect the user programs that have been stored in permanent memory. Compressor Protection The CT50 has a minimum cycle time of 4 minutes to protect your compressor in cool and in heat pump (if you have one).

  • Page 17: Communicating Thermostat

    HVAC system and home conditions. USNAP port To Insert a USNAP radio module: Power off the CT50. Insert the radio module in either slot on the back of the CT50. Power up CT50. To connect to a network follow the instructions Caution that came with the USNAP module.

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