Technical Specifications

T87N1000
The Round® Mercury Free Thermostat with manual changeover and R, Rc, W, Y, G, O, B terminals for single stage heating and cooling systems
Hazmat# UN3091 Lithium metal batteries packed in/with equipment
Overview
The Round® thermostats provide electronic control of 24Vac heating and cooling systems with the classic twist to set dial.
Features
• Mercury Free
• Classic Styling
• Premier White®
• The T87K heat only works with 2 or 3 wire heat-only systems
Product Specifications
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Description The Round® Heat and Cool Mercury Free Thermostat
Application 1 Heat/1 Cool Conventional Systems and Heat Pumps with No Auxiliary Heat
Mounting Round
Changeover Manual
Color Premier White®
Stages 1 Heat/1 Cool
Power Method Battery assisted power stealing
Terminal Designations R, Rc, W, Y, G, O, B
Switch Positions (Fan) AUTO-ON
Switch Positions (System) HEAT-OFF-COOL
Switch Type Relay
Accuracy (F) ±1 F
Accuracy (C) ± 0.5 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 to 90
Electrical Ratings 20 to 30 Vac
Frequency 50 Hz
Frequency 60 Hz
Cycles per Hour Adjustable 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