Wiring diagrams | Honeywell THR840DUK guide

Installation and Setup			homexperttm by Honeywell THR840DUK Digital Thermostat

Wiring diagrams		Wiring diagrams
Thermal actuator	Zone valve	Zone valve	Electric resistance
Thermal actuator	Zone valve	(drive open, drive closed)	heater

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Contents

THR840DUK Digital Thermostat Contents An explanation for householders What is a room thermostat? Install and set up thermostat About your new thermostatQuick reference On/off switch and frost protection 25.0 CHeating or cooling control Temperature control Energy-saving ECO mode24.0 C Wall bracket installation System installation Wiring diagrams Connect system wiringMake sure electrical power is off Basic boiler Combi boiler Wiring diagrams 35.0 C Activate batteries and mount thermostatSystem test Installer setup functions Installer setupTo change installer settings Function Description Setting Options Customised settings for your system Your heating system Changes required Setting OptionsYour cooling system Changes required Setting Options Case of difficulty Description of functions Disposal and recycling Limited WarrantyDisposal and recycling Please retain these instructions for future reference Need Help?