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1Model TT-P-421: Compatibility with low voltage multi-stage gas, oil or electric heating or cooling systems, including multi-stage heat pumps. Model TT-P-421 Terminations: R, O, B, C, Y1, E/W1, G, W2. Ships without batteries.DescriptionTopTech Programmable Thermostat Multi-Stage 2 Heat/1 Cool Conventional and Heat Pump.Compatibility with low voltage multi-stage gas, oil or electric heating or cooling systems, including multi-stage heat pumps.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.
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