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Honeywell RTH221 オーナーマニュアル

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Owner’s Manual
Read and save these 
instructions.
For help please visit  
yourhome.honeywell.com
RTH2300/RTH221  
 
Series
Programmable
Thermostat
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
Do you need assistance? We are here to help.
Call 1-800-468-1502 for wiring assistance before returning 
the thermostat to the store.
This thermostat cannot be used on heat pumps with 
backup heat or on multistage systems.