Owner’s Manual
Read and save these
i
nstructions.
RTHL2510/RTHL2410
Series
Programmable
Thermost at
Identify System Type
This thermostat is compatible with the following systems:
• Gas, oil or electric furnace
• Central air conditioner
• Hot water system with or without pump
• Millivolt system
• Central heating and cooling system
• Heat pump without auxiliary/backup heat
• Heat pump with auxiliary/backup heat