Honeywell W7100A1053 Discharge Air Temperature Controller

The W7100A1053 is a Honeywell discharge air temperature controller designed for HVAC systems, providing staged cooling control (up to 6 stages) with a 40–90 °F setpoint range. It operates on 20–30 VAC and was discontinued by Honeywell in January 2023.

🔧 Key Details
•     Manufacturer: Honeywell
•     Model: W7100A1053 (part of the W7100 family)
•     Type: Discharge air temperature controller
•     Application:
•     Maintains average discharge air temperature in Variable Air Volume (VAV) cooling systems
•     Can be applied to electric makeup air systems or other HVAC setups requiring staged cooling
•     Stages: 0 heating, 6 cooling
•     Setpoint Range: 40–90 °F
•     Supply Voltage: 20–30 VAC, 50/60 Hz
•     Output Type: Staged On/Off
•     Operation:
•     Modulates economizers and sequences mechanical cooling stages
•     Reduces kilowatt demand by using only the minimum cooling capacity needed to hold setpoint
•     When power is interrupted, all stages cycle off; when restored, economizer opens first (if enthalpy is suitable), then cooling stages sequence on