Model TT-P-421
Multi-Stage
2 Heat, 1 Cool

Conventional or Heat Pump
5/2 programmable

This model features:

• Dual Powered – Hardwired or Battery
• 5-2 Day Separate Weekday / Weekend Programming
• Large Display with Bright Blue Backlight
• Adjustable Temperature Set Point Limits
• Non-Volatile Memory Retains User Settings
• Filter Check Monitor
• Adaptive Recovery Mode (ARM™)
• Adjustable 1st and 2nd Stage Temperature Differential
• ESD Guard™ Electronic Circuitry
• Compressor Short Cycle Protection
• Separate Heating and Cooling Set Point Program
  Times and Temperatures
• Temporary Program Override for 4 Hours
  or Until Next Set Point
• Programmable Extended Hold Mode
• Front Access Reset Button
• F° / C° Switch
• Auxiliary Heat Status Indicator
• Mount to Horizontal Box
• Easy Access Front Battery Door
• Separate O & B Terminals
• Meets California Title 24 Guidelines

Support files for the TT-P-421:
Operating / Installation Manual
Warranty Registration