Instruction/ maintenance manual of the product THR840DUK Honeywell
Go to page of 15
User Manual THR840DUK Digital Thermostat 50051982-001 Rev . A.
homexpert tm by Hone ywell THR840DUK Digital Thermostat 3 About your ne w thermostat What is a room thermostat? .................. 4-5 QUICK ST ART GUIDE ............................. 6 Quick refer ence to controls ....................... 7 Operation On/off switch .
User Manual 4 homexpert tm by Hone ywell THR840DUK Digital Thermostat 5 ...an explanation f or householders A room thermostat simply switches the heating system on and of f as necessary .
User Manual 6 homexpert tm by Hone ywell THR840DUK Digital Thermostat 7 The THR840DUK is an easy-to-use thermostat designed to maintain a comfortable environment when you are at home and r educe energy costs when you are away .
Operation 8 homexpert tm by Hone ywell THR840DUK Digital Thermostat 9 On/off switc h and frost pr otection Press the ON/OFF button as shown at left to turn the thermostat on or off.
Operation 10 homexpert tm by Hone ywell THR840DUK Digital Thermostat 11 T emperature contr ol When idle, the thermostat displays the current r oom temperature. Y ou can press the p or q buttons at any time to see the “target” temperature the thermostat is trying to maintain.
Installation and Setup 12 homexpert tm by Hone ywell THR840DUK Digital Thermostat 13 System installation W all bracket installation NO TE: If you are not experienced in equipment installation, we recommend that these procedures be done by a prof essional installer.
Installation and Setup 14 homexpert tm by Hone ywell THR840DUK Digital Thermostat 15 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 .
Installation and Setup 16 homexpert tm by Hone ywell THR840DUK Digital Thermostat 17 Wiring diagrams Thermal actuator Zone valve L N Wiring diagrams Zone valve (drive open, drive closed) Electric resi.
Installation and Setup 18 homexpert tm by Hone ywell THR840DUK Digital Thermostat 19 Activate batteries and mount thermostat Remove the thermostat cover (see page 13). Discard the plastic tab inside to activate the batteries, then replace batteries. The thermostat should display the current r oom temperature.
Installation and Setup 20 homexpert tm by Hone ywell THR840DUK Digital Thermostat 21 Installer setup Installer settings allow you to customise how your system works. Check the tables on pages 21-23 to see if any settings need to be changed. T o change installer settings: 1 Press and hold the ON/OFF button for 5 seconds.
Installation and Setup 22 homexpert tm by Hone ywell THR840DUK Digital Thermostat 23 Installer setup functions Function Description Setting Options 7: ES ECO default temperatur e 18°C ** Options: 5°.
Installation and Setup 24 homexpert tm by Hone ywell THR840DUK Digital Thermostat 25 Description of functions Ot Minimum boiler off time : Check proper setting for your system (see page 23). Cr Cycles per hour : Check proper setting for your system (see page 23).
Appendix 26 homexpert tm by Hone ywell THR840DUK Digital Thermostat 27 Limited W arranty Honeywell warrants this product for 1 year fr om date of purchase. We undertake to replace or repair at our discr etion, products should they become defective within 1 year solely as a result of faulty materials and or workmanship.
Honeywell The Arnold Centre Paycocke Road Basildon, Essex SS14 3EA T echnical Help 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 .
An important point after buying a device Honeywell THR840DUK (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell THR840DUK yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell THR840DUK - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell THR840DUK you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell THR840DUK will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell THR840DUK, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell THR840DUK.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell THR840DUK. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell THR840DUK along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
