Intouch CA8900 Z-Wave Digital Thermostat
Description and Features
The CA8900 is a digital thermostat that can be controlled wirelessly with Z-Wave controllers supporting the Thermostat General V2 Device Class. The thermostat is compatible with all standard 24 VAC heating and cooling systems, up to two-stage heat, one-stage cool, and two-stage heat pump. The CA8900 operates as a simple thermostat with buttons to set target temperatures for heat and cool modes. The Save Energy button adds two more modes for target temperatures to provide a single button set-back mode for easy operation. It can easily be retrofitted to existing systems as part of a Z-wave control strategy. The CA8900 Wireless Thermostat provides two-way communication as part of a Z-Wave® network. When it receives commands from the Central Controller Unit, it sends back a confirmation that the command was received and implemented. Each module in a Z-Wave network communicates with every other module, acting as a “repeater” and routing your commands to their destination by the most reliable pathway.
When Z-Wave devices (regardless of manufacturer) are installed throughout the house, signals are automatically routed around obstacles or dead spots, strengthening the network as more devices are added. The Z-Wave icon shows on the lower right of the display panel, indicating that the thermostat is in contact with the controller. If the icon is not present, communication has been lost. If this occurs, all remote HVAC functions are shut off.
- This thermostat can be used with all 24VAC heating and cooling systems. It cannot be used with line voltage systems.
- The CA8900 is digital and your desired heat or cool temperatures can easily be set on the large screen with the TEMP UP (+) and TEMP DOWN (-) buttons on the front.
- A minimum 4-minute off time protects heating and cooling systems from damage.
- This thermostat uses a new technique called sequential staging for more comfort with faster reaction to requested temperature changes.
NOTE: When using a heat pump with auxiliary heat, if the heat pump cannot keep up and/or is defective, remove jumper from position 2B and put jumper on position 2A. This will make the auxiliary heat your only source of heat. Be sure to restore it to PUMP when the pump is again operational, as auxiliary heat is more expensive than pump heat. For more information.
This guide is in two parts:
- Part One: Operating Guide — for the homeowner or end user.
- Part Two Installing Guide — for the installer or technician.
Operating the CA8900
To set the thermostat to control your heating system, press the HEAT button so the word HEAT displays. Press again to turn OFF. The word HEAT will flash when the thermostat is calling for heat. Press the TEMP UP and TEMP DOWN buttons to select the desired temperature. The word TARGET will be displayed with the temperature you are setting. (The display will return to showing room temperature in 5 seconds.
To set the thermostat to control your cooling system, press the COOL button so the word COOL displays. Press again to turn OFF. The word COOL will flash when the thermostat is calling for cooling.
- Slide the fan switch to AUTO to automatically run the system’s fan during heating and cooling.
- Slide the fan switch to ON to run the fan continuously, even without heating and cooling
The NORMAL and SAVE ENERGY buttons allow you to quickly switch from the NORMAL programmed target temp to a pre-determined set-back temperature, called the Save Energy temp.
- When in HEAT mode:
- Press the SAVE ENERGY button. The words SAVE and TARGET appear.
- Press the TEMP UP or TEMP DOWN buttons to set the SAVE ENERGY temperature for heating, or you can accept the default temperature of 65°F. After 5 seconds, the display shows the room temperature and the words SAVE HEAT.
- When in COOL mode:
- Press the SAVE ENERGY button. The words SAVE and TARGET appear.
- Press the TEMP UP or TEMP DOWN buttons to set the SAVE ENERGY temperature for cooling, or you can accept the default temperature of 80°F. After 5 seconds, the display shows the room temperature and the words COOL SAVE.
Press the NORMAL button to return to the programmed target heat or cool temperature, (depending on which mode you are in). You can press the TEMP UP or TEMP DOWN buttons to change this target temperature. After 5 seconds, the display shows room temperature.
Joining a Z-Wave® Network
To join a Z-Wave network, set the Z-Wave controller to INCLUDE mode, then press and release the BIND button on the CA8900 thermostat. Follow the instructions provided with your controller. You would also use the BIND button when excluding from a Z-Wave network.
Low Battery Warning
When the batteries are low, the battery icon on the display panel will flash. The two AA batteries in the unit need to be replaced. These batteries are not for operation but provide battery backup for your settings. The thermostat requires 24VAC for operation, and the HVAC system will stop functioning if the thermostat loses power
Replace the batteries as soon as you see the flashing battery icon. Press the RESET button after replacing the batteries.
Displaying Fahrenheit or Celsius
Whether the temperature display panel displays in Fahrenheit or Celsius depends on the position of the F/C jumper. The F/C jumper is at the top right of the PCB, called Jumper 4 in the diagram below.
- With the jumper removed, the display is in Fahrenheit (the default setting).
- With the jumper placed on both pins, the display is in Celsius (centigrade). When the jumper is changed, you must press the RESET button on the front of the thermostat.
Setting a Heat Pump’s AUX ONLY Mode
If you have a heat pump with auxiliary heat and the heat pump is not working or cannot keep up with heat demand, you can use the auxiliary heat only. Move the jumper from position 2B [heat pump] to position 2A [Aux only].
Reference:
DOWNLOADS MANUALS:
Intouch CA8900 Z-Wave Digital Thermostat Operating Guide
OTHER MANUALS:
Intouch CA8900 Z-Wave Digital Thermostat Installation GUIDE
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