Tag: THR840D

Honeywell Home THR840D Digital Room Thermostat Installation Installer Mode To enter Installer Mode To select a parameter Display Parameter flowchart To change a parameter To exit Installer Mode Parameters Description Parameter Range of values Default Minimum ON/OFF time Ot 1,2,3,4,5 m 1 m Cycle rate Cr {3,6,9,12} 6 Proportional band width Pb 1.5 … 3.0…