Radio Thermostat CT80 - User Manual

PG 1
Operation Guide CT80
The CT80 programmable communicating
thermostat operates via a high-quality, easy-to-use
touch screen. To program or adjust your CT80,
simply touch your nger rmly to the screen. The
screen will automatically light up. The screen will
respond differently to different types of touches, so
you may want to experiment with your nger or a
stylus (not included), to see what works best for you.
The “beep” sound is heard when the CT80 senses
a valid touch of the screen.
ENGLISH
Statement of use: 100% Compatible with all popular
residential HVAC systems; 24VAC single, two, three stage
conventional heating systems (gas/oil/electric), heat pumps
(single and two stage compression) and 1,2, or 3 stage
auxiliary heat (electric or fossil), zoned forced air and
zoned hot water (2 or 3 wire), millivolt systems (with 24VAC
adapter), one or two stage cooling, and hybrid systems.
Save
Energy
button
Power Grid
status
indicator
top cover
Touch screen
Wire
terminals
RC-RH
Connect Switch
temp
button
Home
button
Mode
button
Lower
temp
MENU
button
Reset
button
bottom
cover
statu
HVAC
Filter
s
status
FAN
HEAT
CHECK
FILTER
SAVE
E
N
E
R
G
Y
COOL
pn812-004-002 b2
Raise
button

Summary

CONTROL SCREENS

HOME Screen

The main interface for viewing and adjusting thermostat settings.

MENU Screen

PROGRAM

Set daily time/temperature schedules using interview or calendar methods.

COMFORT Settings

Adjusts settings for consistent comfort, precision, and energy efficiency.

Lock Control

Restricts user access to change temperature and other thermostat settings.

Network Control

Configure network connections and mate thermostat to a network.

MANUAL Screen

Temporary OVERRIDE

Make temporary changes to Target Temperature using +/- buttons.

HOLD Function

Hold the target temperature indefinitely until manually turned off.

HOLIDAY;VACATION Programs

Set specific temperatures for holidays or extended absences.

FRESH AIR; EMER HEAT

Utilize outside air for heating/cooling or emergency heat source.

Communicating Thermostat

RTM-1 Radio Ports

Connects thermostat to other systems like alarm or home automation.

WiFi Connectivity

Enables remote access to HVAC system and web-based energy management.

Power Grid Status

Connects to power company programs for energy usage moderation.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features
4. Technical Specifications
5. Pre-set Program

The CT80 is a programmable communicating thermostat designed for residential HVAC systems. It features a high-quality, easy-to-use touch screen interface for programming and adjustments. The screen lights up automatically upon touch, and a "beep" sound confirms a valid touch.

Function Description:

The CT80 controls various HVAC systems, including single, two, and three-stage conventional heating (gas/oil/electric), single and two-stage compression heat pumps, 1, 2, or 3-stage auxiliary heat (electric or fossil), zoned forced air, zoned hot water (2 or 3 wire), millivolt systems (with a 24VAC adapter), one or two-stage cooling, and hybrid systems.

Usage Features:

Home Screen: This is the primary display when the unit is operating. It shows current temperature, target temperature, humidity, time, day, and power company information.

• Mode Selection: Pressing the Power button allows selection of COOL, HEAT, AUTO, or OFF modes.
  • COOL: Operates the cooling system.
  • HEAT: Operates the heating system.
  • AUTO: The CT80's TRUE AUTO mode automatically switches between heating and cooling based on programmed temperatures, without time limitations.
  • OFF: Disables HVAC functions.
• Temperature Adjustment: Use the +/- buttons to set the target temperature.
• Time and Day Setting: Touch the hour, minute, or day on the screen and use the +/- buttons to adjust.
• Save Energy Button: This feature automatically adjusts the target temperature to the lowest setting in the current program to conserve energy. Pressing it again returns to the programmed temperature.
• Fan Control: Accessible via the FAN icon on the Home screen.
  • AUTO: Fan operates automatically.
  • CIRC: Circulates air for up to nine minutes per hour for improved air quality and efficiency.
  • FRESH: If a fresh air baffle is connected to the EX terminal, this uses outside air as the first stage of heating or cooling. Works with AUTO or ON.
  • ON: Manually turns the fan on continuously until switched back to AUTO. Available in OFF mode for ventilation.
• HVAC Status Indicators: Orange indicates HEAT, blue indicates COOL, and green indicates the fan is active.

Menu Screen: The gateway to advanced functions.

• Program: Allows setting daily time/temperature schedules using either an "Interview Method" (guided questions for quick setup) or a "Calendar Method" (for fine-tuning with up to seven time slots per day). Heating and cooling are programmed separately.
  • Interview Method: Guides the user through questions to set wake-up times and temperatures.
  • Calendar Method: Displays a schedule of time slots and temperatures. Users can add/delete time slots, adjust times/temperatures, and copy schedules to other days.
  • A/B Program: Stores two complete weekly programs (Prog A is default).
• Comfort Setting: Manages temperature control precision and energy efficiency.
  • HVAC CYCLING: Sets the desired temperature variance (0.5° to 3.0°F or 0.25° to 1.5°C) before the system turns on.
  • 2nd STAGE ON AT: Adjusts settings for the next stage of heating, cooling, or auxiliary heat (2.0° to 6.0°F or 1.0° to 3.0°C). The "NEVER" option prevents auxiliary heat use except for emergency.
  • RECOVERY (ECON or FAST): In multi-stage systems, ECON uses less energy over a longer period, while FAST uses all available stages for quicker recovery but more energy.
• Humidity Control: Manages an external humidifier or uses the air conditioner for dehumidification.
  • HUMIDIFR: Sets a minimum humidity level (20% to 90%). Can be set to run "ALWAYS" or only with "W/ HEAT" (when humidistat calls and heat is running).
  • DE-HUMID BY A/C: Sets a maximum humidity level. Can be set to run "ALWAYS" or only with "HST+TST" (when humidistat calls and thermostat calls for COOL).
  • EXTERNAL DE-HUMID: Controls an external dehumidifier connected to the DH terminal. Can run with or without the fan.
• Consumables: Tracks run times for filters, UV bulbs, and humidifier pads, providing reminders for replacement. Users can set alert schedules (0 to 999 days).
• Calibrate: Adjusts the displayed temperature to match another device (±1-9°F). Also allows adjustment of LCD screen contrast and toggling the night light function.
• Lock Control: Provides three levels of control over user access.
  • UNLOCK: Full access.
  • PARTIAL: Limits temporary temperature override to ±9°F (±5°C).
  • FULL: No changes can be made.
• Network: Configures network connections for displaying electric meter data or connecting to Home Automation networks (e.g., AMI).
  • RTM-1 Radio Modules: The CT80 has two RTM-1 radio ports for communication with other systems (e.g., Z-Wave alarm systems, power grid status, home WiFi).
  • Mating to a Network: Guides the user through connecting the CT80 to a network via a radio module.
• Information: Accesses interactive screens and messages from network connections, displaying energy use, HVAC status, and network connectivity.
• F/C Set: Switches the temperature display between Fahrenheit and Celsius.
• Chirp Set: Turns the audible chirp sound on or off.

Manual Screen: Allows temporary overrides of the CT80's operation.

• Temporary OVERRIDE: Adjusts the target temperature temporarily using the +/- buttons.
• HOLD: Holds the set target temperature indefinitely until manually turned off.
• HOLIDAY PROGRAM: A single program that repeats daily until turned off, superseding the weekly program.
• VACATION: Holds a pre-set temperature until turned off.
• FRESH AIR: Uses outside air as the first stage of heating or cooling if a baffle is connected.
• EMER HEAT: Available for heat pumps with auxiliary heat, disabling the heat pump and using auxiliary heat as the sole source.

Maintenance Features:

• Reset Button: Reboots the CT80 processor without affecting stored user programs.

Technical Specifications:

• Compatibility: 100% compatible with popular residential HVAC systems.
• Power: 24VAC.
• Temperature Control: ±1°F accuracy, with calibration options.
• Humidity Control: Adjustable minimum and maximum humidity levels.
• Programming: Up to seven time slots per day for heating and cooling schedules.
• Connectivity: Two RTM-1 radio ports for network modules (e.g., Z-Wave, WiFi).

Pre-set Program:

The CT80 comes pre-programmed with an EPA-approved energy-efficient program. Users are recommended to run this program for one week to assess its suitability before inputting a custom program. To run the EPA program, select HEAT or COOL mode, set the time and day, and press HOME.

Radio Thermostat CT80 Specifications