Honeywell YTHX9421R5101BB/U

• Control heating, cooling and IAQ equipment with only 2 wires at the thermostat, heating, cooling and IAQ equipment wires to the equipment interface module
• Smart schedule - programs in seconds for any lifestyle
• Patented interview based programming and installer setup
• RedLINK™ wireless communication
• Increase profit per job by including RedLINK™ accessories that provide comfort and convenience. RedLINK™ accessories include the RedLINK™ internet gateway, portable comfort control (PCC) , wireless outdoor sensor, wireless indoor sensor, wireless entry/exit remote, wireless vent and filter boost remote, TrueSTEAM™ humidifier with wireless adapter and TrueZONE® zoning panel with wireless adapter
• Light commercial - commercial language (occupied and unoccupied) , schedule holidays and custom events, remote setback economizer and time of day
• Delta T alerts and diagnostics informs customers when their system is not performing as expected with instructions to contact the dealer. Provides a sense of security and greater comfort while generating repeat business
• All Prestige® IAQ kits come standard with a return and discharge air temperature sensor to measure Delta T
• Alerts and user interactions log - keeps a searchable history of alerts and setting changes to the thermostat to determine if there is a system malfunction or if the issue was caused by user error. Saves time in troubleshooting and points the technician in the right direction
• Performance logs - keeps a history of heating and cooling performance. The performance log includes minimum and maximum Delta T, minimum and maximum discharge temperature, minimum and maximum return temperature, minimum and maximum indoor temperature/humidity, minimum and maximum outdoor temperature/humidity and run time. Quickly determine if the system is performing as expected and reduces service time on the job
• Customizable service reminders allow dealers to remind their customers when its time to call for service, when their warranty is expiring and to provide customized alerts
• USB port for transferring installer setup customizable reminders, custom events and holidays to multiple thermostats
• USB port for adding the dealer's full color business logo on the screen
• 3 assignable outputs to control humidification, dehumidification, ventilation and a stage of heating or cooling
• 4 assignable inputs on the equipment interface module can be used with wired outdoor, indoor or discharge sensors, occupancy sensor for remote setback and dry contact devices to trip pre-packaged or custom alerts such as a full drain pan or water leak
• Extend wireless range of the equipment interface module by connecting a THM4000R1000 wireless adapter to the ABCD terminals
• Precise temperature control (+/- 1 deg F) for reliable and consistent temperature
• Multiple staging options to provide comfort or energy savings

Application: Residential and Light Commercial