Chronotherm IV Plus RF Wireless Programmable Thermostat provides wireless control of 24 Vac heating and cooling systems. Use with W8665A for single-zone applications or W8665E for zoning applications.
Features

• No wires to thermostat allow 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.
• Models available with programmable fan operation.
• 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 allow 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.

Product Specifications

• Description: Chronotherm IV Plus Wireless Programmable
• Application: Gas, Electric
• Programmability: 7 Day Program
• Changeover: Auto or Manual
• Color: Premier White
• User Interface: Hard Button
• Switch Positions (System): HEAT-OFF-COOL-AUTO
• Switch Positions (Fan): AUTO-ON
• Power Method: Battery, Communicating
• 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: 20 to 30 Vac
• Frequency: 60 Hz. 50 Hz
• Setting Temperature Range (F): Heat: 40ªF to 90ªF Cool: 45ªF to 99ªF
• Setting Temperature Range (C): Heat: 4.5ªC to 32ªC Cool: 7ªC to 37ªC
• Differential Temperature (F):1ªF
• Differential Temperature (C):0.5ªC
• Stages: Up to 2 Heat/1 Cool
• Staging: Staging controlled by W8665 Zone Panel (not included)
• 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