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The Round® T87N thermostat provides electronic control of 24Vac heating and cooling systems with the classic twist to set dial. . Mercury Free . Classic Styling . Premier White® . Separate temperature setting and thermometer FEATURES: Description- The Round® Heat and Cool Mercury Free Thermostat Application- Conventional and Heat Pump systems Mounting- Round Changeover- Manual Color- Premier White® Stages- 1 Heat/1 Cool Power Method- Uses stored power from heating and cooling controls. Terminal Designations- R, Rc, W, Y, G, O, B Switch Positions (Fan)- AUTO-ON Switch Positions (System)- COOL-OFF-HEAT Switch Type- Relay Accuracy- (F) 2 F Accuracy- (C) 1 C Dimensions- (in.) 3 11/16 in. diameter x 1 3/4 in. deep Dimensions- (mm) 94 mm diameter x 45 mm deep Setting Temperature Range- (F) 40 F to 90 F Frequency- 60 Hz;50 Hz Cycles per Hour- Adj. 1,3,5,9 Cool Current- 0.02-1.2A running Heat Current- 0.02-1.2A running Sensor Element- Thermistor Operating Humidity Range- (% RH) 5 to 90% RH (non-condensing) Voltage- 20 to 30 Vac

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