| Application |
Gas;Electric (Conventional) |
| Programmability | 7 Day Program |
| Changeover | Automatic |
| Switch Positions (System) | HEAT-OFF-COOL-AUTO |
| Switch Positions (Fan) | AUTO-ON |
| Power Method | Battery |
| Terminal Designations | Wireless |
| Dimensions (in.) | 3 3/4 in. high x 6 1/16 in. long x 1 9/16 in. deep |
| Dimensions (mm) | 95.3 mm high x 154 mm long x 39.7 mm deep |
| Mounting | Horizontal |
| Electrical Ratings | 18 to 30 Vac |
| Frequency | 60 Hz;50 Hz |
| Setting Temperature Range (F) | Heat: 40 F to 90 F; Cool: 45 F to 99 F |
| Setting Temperature Range (C) | Heat: 4.5 C to 32 C; Cool: 7 C to 35 C |
| Differential Temperature (F) | 1 F |
| Differential Temperature (C) | 0.5 C |
| Stages | Staging controlled by W8665 |
| Sensor Element | Thermistor |
| Currents (Heating) | 1.5A running, 3.5A inrush |
| Currents (Cooling) | 1.5A running, 7.5A inrush |
| Currents (Fan) | 0.5A running, 2.5A inrush |
| Transmitter Range | 3 ft. minimum; 200 ft. maximum. |
| Transmitter Frequency | 345 MHz |
| Operating Humidity Range (% RH) | 5 to 90% RH, non-condensing |
| Temperature Range, Ambient (F) | 40 F to 110 F |
| Temperature Range, Ambient (C) | 4 C to 43 C |
| Comments | Each thermostat is encoded with unique serial numbers.;Required accessory (not included): W8665A or W8665E Receiver Module |
| Color | Premier White® |
Zoning Simplified! |
T8665A Wireless Thermostat Installation |
T8665A Wireless Thermostat Users Guide |
W8665 A and E Receiver Installation |
| Model | Application | Stages | Zones | Comments |
| W8665A | Conventional gas, oil or
electric systems. | 1H/1C | One | Use with T8665A Wireless
Thermostat. |
| W8665E | Conventional gas, oil or
electric systems. | 1H/1C | Up to three | Use with T8665A Wireless
Thermostats.Use with EMM-3 Electronic
MiniZone Panel |
| | Single or multi-stage
conventional or heat pump systems. | Up to 2H/2C | | Use with T8665A Wireless
Thermostats.Use with EMM-3U Universal
Electronic MiniZone Panel. |
| | | 1H/1C or up to 3H/2C | | Use with T8665A Wireless
Thermostats. Use with TZ-4 TotalZone® Zone Control Pane**. |
** TZ-4 can work with up to 32 zones. Must use multiple W8665E Receiver Modules.
