Selection Guide

Precise • Quality • Reliable • Innovative
Ultimate Series
84210T
5/2, 7 Day or Non-Programmable
Touchscreen Thermostat
Compatibility:
• Up to 4 Heat / 2 Cool Heat Pump Systems
Up to 3 Heat / 2 Cool Conventional Systems
• 24 VAC Gas, Oil or Electric Systems
• Millivolt
Features:
•10 Square Inch Touchscreen Display
with Bright Blue Backlight
• Residential or Commercial Modes
• Indoor or Outdoor Remote Sensing
• Auto or Manual Changeover
• Adjustable Compressor Protection
• Hardwire or Battery Powered
• Adjustable Temperature Limits
• Hot Water Gravity & Zoned
• Hot Water Solenoid Valves (2-wire)
• Air / Ground / Hydronic Exchanger
• Separate User and Installer Reset
Buttons
• Auxiliary Heat Fossil Fuel Option
• Multi-Level Keypad Lockout
• Economizer Control
• Programmable Fan Mode
• English / Spanish Packaging and
Instruction Card
®
Accessories
• 6390 Remote Indoor Sensor
• 6490 Remote Outdoor Sensor
Dimensions 4.13” x 6.13” x 1.38”
Electric 24 Volt AC (18-30 Volt AC)
Rating 1 Amp Maximum Load per Terminal
7 Amp Total Maximum Load (All Terminals)
AC Power 18-30 Volt AC
DC Power 3.0 Volts DC
(2 AA Alkaline Batteries Included)
Control 45°F to 90°F
Range (7°C to 32°C)
Display 40°F to 99°F
Range (5°C to 37°C)
Accuracy +/-1°F (+/-.5°C)
Storage 14°F to 140°F
Temperature (-10°C to 60°C)
Operating 5% to 95% Relative Humidity
Humidity
Terminations A, G, Rc, Rh, W2/AUX2, W3/O/B, Y1,
Y2, W1/E/AUX1, C, L, S1, S2
Specifi cations
Actual Size