Honeywell YTHX9421R5101WW/U

The Prestige® IAQ thermostat is a 2 wire high definition color touch screen thermostat, 7 day programmable and selectable for residential or light commercial use. Controls up to 4-stages of heat and 2-stages of cool in a heat pump system and up to 3-stages of heat and 2-stages of cool in a conventional system. Three sets of Universal IAQ contacts to control humidification, dehumidification and ventilation. Four sensor inputs for wired sensors or dry contact devices. Works with the Equipment Interface Module and RedLINK® accessories including the RedLINK® Internet Gateway, Portable Comfort Control, Wireless Outdoor Sensor and Wireless Indoor Sensor.

Honeywell Prestige® IAQ Comfort System, 2-Wire, 40 to 90 deg F Control Range, 4 Stages Heat, 2 Stages Cool, Programs Per Week: 7, Terminal Designations: R, RC, RH, C, W-O/B, W2-AUX1, W3-AUX2, Y, Y2, G, A-L/A, U1, U1, U2, U2, U3, U3, S1, S1, S2, S2, S3, S3, S4, S4, A, B, C, D, System Switching: Heat/Off/Cool/Auto, Fan Switching: Auto-On-Circ, 8.06 sq-in Tri-Lingual Display, 18 to 30 VAC, White, 3-1/2 in H x 4-1/2 in W x 7/8 in D, Import

• Control heating, cooling and IAQ equipment with only 2 wires at the thermostat, heating, cooling and IAQ equipment wires to the equipment interface module
• Patented interview based programming and installer setup
• RedLINK™ wireless communications
• 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 TrueSTEAM™ humidifier with wireless adapter and TrueZONE® zoning panel with wireless adapter
• Configurable for residential and light commercial applications, meets commercial code and is title 24 compliant
• 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 operating as expected with instructions to contact the dealers
• Provides a sense of security and greater comfort while generating repeat business
• All Prestige® IAQ 2.0 systems 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 a user error, saves time in troubleshooting and points the technician in the right direction, the alerts and user interaction Logs are viewable on a computer after you download them from the thermostat to a MicroSD card
• 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 set up 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
• 2 assignable inputs can be used with wired sensors, remote setback or dry contact devices to trip pre-packaged or custom alerts such as a full drain pan or water leak
• Tri-lingual - english, french and spanish display options
• Precise temperature control (+/-1 deg F) for reliable and consistent temperature
• Multiple staging options to provide comfort or energy savings
• 40 to 90 deg F heating/50 to 99 deg F cooling control

• Manual https://www.capitolgroupinc.com//ASSETS/DOCUMENTS/ITEMS/EN/Honeywell_YTHX9421R5051_U_Manual.pdf