Honeywell thr840duk User Manual Download

Page: 9 / 16

Installation and Setup

homexpert

by Honeywell THR840DUK Digital Thermostat

Connect system wiring

Connect wiring from your heating or cooling
equipment to the thermostat as shown at left.
See wiring diagrams on pages 15-17 for details.

1 Make sure electrical power is off

Strip insulation to expose about 6 mm of

bare wire.

Use a screwdriver to loosen terminal screw,

insert wire into slot, then tighten screw.

Replace thermostat cover, then restore

electrical power.

1.0 - 2.5 mm

6 mm max.

NOTE:

All wiring must comply with IEE

regulations. Keep AC mains supply/load cables
separate from equipment wiring.

Wiring diagrams

Basic boiler

Combi boiler

This Manual: http://www.manuallib.com/file/2598268

Summary of Contents for thr840duk

Page 1: ...Lib com ManualLib com collects and classifies the global product instrunction manuals to help users access anytime and anywhere helping users make better use of products Home http www manuallib com Chinese http www shuomingshuku com This Manual http www manuallib com file 2598268 ...

Page 2: ...User Manual THR840DUK Digital Thermostat 50051982 001 Rev A This Manual http www manuallib com file 2598268 ...

Page 3: ...ntents NOTE This symbol will flash on the screen when battery power is low Remove cover and replace batteries with two fresh AA alkaline batteries as shown on page 18 WARNING This product must be correctly installed and configured to work properly see pages 12 24 If you are not experienced in wiring electrical equipment we recommend professional installation to avoid possible personal injury or eq...

Page 4: ...then leave it alone to do its job The best way to do this is to set the room thermostat to a low temperature say 18 C and then turn it up by one degree each day until you are comfortable with the temperature You won t have to adjust the thermostat further Any adjustment above this setting will waste energy and cost you more money What is a room thermostat If your heating system is a boiler with ra...

Page 5: ...as not been done by a professional installer See pages 12 24 2 Select heating default or cooling mode See page 9 3 Set desired indoor temperature See page 10 QUICK START GUIDE Quick reference Cooling system is running see page 9 ECO mode countdown see page 11 Heating system is running see page 9 Current temperature or target temperature when flashing ECO mode is on see page 11 Press to change temp...

Page 6: ... appears when thermostat is off System maintains minimum temperature when thermostat is off Heating or cooling control The thermostat is pre set to control only your heating system If installed and set up correctly it can also be used to control your cooling system To switch between heating and cooling press and hold the p and q buttons together until the screen changes Press and hold both buttons...

Page 7: ...nge target temperature Energy saving ECO mode The ECO mode overrides thermostat settings to maintain a different temperature for 1 to 24 hours This can be useful to reduce heating or cooling costs when you are away from home 1 Press the green ECO button to display timer 2 Press the p or q buttons to set timer 1 24 hours While in ECO mode the screen will alternately display remaining time and curre...

Page 8: ...wer 2 Choose thermostat location and install wall bracket 3 Connect system wiring 4 Activate batteries and attach thermostat cover 5 Restore electric power 6 Setup and test system operation NO NO OK 1 2 1 5 m Remove the thermostat cover and use a screwdriver to pry open the tabs as shown at left then remove the thermostat from the wall bracket Install about 1 2 to 1 5 metres above the floor where ...

Page 9: ... sure electrical power is off 2 Strip insulation to expose about 6 mm of bare wire 3 Use a screwdriver to loosen terminal screw insert wire into slot then tighten screw 4 Replace thermostat cover then restore electrical power 1 0 2 5 mm2 6 mm max NOTE All wiring must comply with IEE regulations Keep AC mains supply load cables separate from equipment wiring Wiring diagrams Basic boiler Combi boile...

Page 10: ...omexperttm by Honeywell THR840DUK Digital Thermostat 17 Wiring diagrams Thermal actuator Zone valve L N Wiring diagrams Zone valve drive open drive closed Electric resistance heater This Manual http www manuallib com file 2598268 ...

Page 11: ...ries with two fresh AA alkaline batteries System test After installation you should check to make sure the system is working properly 1 Check the power supply to make sure the heating system is on 2 Press the p button to raise target temperature to maximum 35 C If the system is set up properly the heating symbol should appear on the thermostat display and the heating system should begin running 3 ...

Page 12: ...OFF button again to save your choice then use the p or q buttons to select another function To exit installer setup press and hold the ON OFF button for 5 seconds 25 0 c i0se 0e 1 Press and hold both buttons for 5 seconds Function Setting Installer setup functions Function Description Setting Options 1 Ot Minimum boiler on off time 1 minute Options 1 to 5 minutes See page 23 for important informat...

Page 13: ...Enter Installer Setup see page 27 then press p or q for access to system settings NOTE See descriptions of functions on page 24 Customised settings for your system Your heating system Changes required Setting Options Standard gas boiler 30kW None No change Zone Valve None No change Oil boiler Function 1 Ot Function 2 Cr Set to 4 minutes Set to 3 CPH Thermal actuator Function 2 Cr Set to 12 CPH Ele...

Page 14: ...t target temperature when the thermostat is in ECO mode see page 11 HCHeating cooling options When set to 1 the thermostat can control both heating and cooling systems see page 9 OSFrost protection temperature Minimum temperature allowed when the thermostat is off see page 8 EH Electric heat Check proper setting for your system see page 23 In case of difficulty Thermostat screen is blank Make sure...

Page 15: ...ot extend to cover consequential loss or damage or installation costs arising from a defective product If the product is defective please return it together with a proof of purchase or receipt to the place of purchase This does not affect your statutory rights If you require further information about this product call the homexperttm by Honeywell technical helpline on 0845 604 2893 For a full list...

Page 16: ... Desk 0845 604 2893 50051982 001 Rev A www homexpertbyhoneywell com 2010 Honeywell International Inc Need Help For assistance with this product please visit www homexpertbyhoneywell com or call Honeywell Customer Care at 0845 604 2893 This Manual http www manuallib com file 2598268 ...

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