Wireless Universal Programmable Thermostat Combo- Three Stage Heat, Two Stage Cool, Three Zone Capable
Wireless Universal Programmable Thermostat Combo- Three Stage Heat, Two Stage Cool, Three Zone Capable
Model: Honeywell T8665A-W8665E 3Z
Model: Honeywell T8665A-W8665E 3Z
This kit provides wireless control of 24 Vac heating and cooling systems. This wireless kit can handle up to three stages of heat and two stages of cool for up to three zones when used with a Honeywell EMM-3 Electronic MiniZone™ Panel, EMM-3U Universal Electronic MiniZone™ Panel, or TZ-4 TotalZone® Zone Control Panel. If not used with one of the above zone control panels, the kit will only operate equipment that is one stage heating and one stage cooling. This kit includes three Honeywell T8665A 1002 Wireless Thermostat and one Honeywell W8665E 1000 Wireless Receiver.
Honeywell T8665A 1002 Features
- No wires to thermostat allows easy installation.
- Ideal for retrofit zoning.
- Use when current thermostat inconveniently located or to add a thermostat to a room addition.
- Easy-to-read large display with bright back-lighting.
- Full seven-day flexible program capability; different schedules and temperature setpoints selectable each day.
- Copy key makes programming easier and faster. Daylight Savings Time (DST) key.
- Easy temporary temperature setpoint changes for current period, vacation hold (1 to 255 days) or indefinite hold.
- Frequently used keys are conveniently located near LCD.
- Configurable features allows one model to replace many different models.
- F or C temperature display.
- Automatic or manual changeover.
- Electric or conventional heat fan operation.
- Adjustable heating cycle rate.
- Minimum-off time for cooling compressors and heat pumps protects equipment.
- Easy installation, setup and system test.
- System test simplifies troubleshooting and saves time by overriding time delays.
- Adaptive Intelligent Recovery control brings room temperature to temperature setpoint at programmed time.
- Setpoints are permanently held in memory (no batteries used) and retained during power outages.
- Adjustable temperature range stops.
Honeywell W8665E 1000 Features
- W8665E can be used with up to three zones when used with a Honeywell Zoning Panel.
- Ideal for retrofit zoning or when current thermostat is in a poor location.


Honeywell T8665A Chronotherm® IV Owner's Guide(PDF, 1.12 MB)
Honeywell T8665A Chronotherm® IV User's Guide(PDF, 1.10 MB)
Honeywell T8665A Chronotherm® IV Spec Sheet(PDF, 195 KB)
Honeywell W8665A/E Instllations Instructions(PDF, 255 KB)
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