Honeywell THR872CUK Thermostat User Manual

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User Manual  
THR872CUK Wireless  
Programmable Thermostat  
5
0051985-001 Rev. A  
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homexpert by Honeywell THR872CUK Wireless Programmable Thermostat  
Contents  
About your new thermostat  
Installation and setup  
What is a programmable thermostat?....4-5  
Features ...................................................6  
QUICK START GUIDE.............................7  
Quick reference to controls.......................8  
Date/time settings ....................................9  
System installation..................................20  
Wireless relay box installation..................21  
System wiring....................................22-23  
Thermostat installation.......................24-25  
System test ............................................26  
Installer setup ....................................27-31  
WARNING: This product must be correctly installed and configured to work properly (see  
pages 20-31). If you are not experienced in wiring electrical equipment, we recommend  
professional installation to avoid possible personal injury or equipment damage.  
Operation and programming  
TIP: After installation, see the QUICK START GUIDE on page 7 to customise and begin using  
your new thermostat right away.  
Appendix  
Heating and cooling control....................10  
Operating modes....................................11  
Cost-saving program schedules .............12  
To adjust program schedules..................13  
To add or remove program time periods....14  
In case of difficulty.............................32-33  
Warranty information...............................34  
Declarations, disposal & recycling...........35  
Special functions  
Temporary schedule overrides ................15  
Day Off mode .........................................16  
Party mode.............................................17  
Holiday mode .........................................18  
Advanced features..................................19  
NOTE: This symbol will flash on the screen  
when battery power is low. Remove cover as  
shown on page 24 and replace batteries with  
two fresh AA alkaline batteries.  
Copyright © 2010 Honeywell International Inc.  
homexpert by Honeywell is a trademark of Honeywell International Inc. All rights reserved.  
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User Manual  
homexpert by Honeywell THR872CUK Wireless Programmable Thermostat  
What is a programmable room thermostat?  
.
..an explanation for householders  
way to do this is to set low temperatures first, say 18°C, and then turn them up by one degree each day until  
you are comfortable with the temperatures. You won’t have to adjust the thermostat further. Any adjustments  
above these settings will waste energy and cost you more money.  
A programmable room thermostat is both a programmer and a room thermostat.  
A programmer allows you to set ‘On’ and ‘Off’ time periods to suit your own lifestyle. A  
room thermostat works by sensing the air temperature, switching on the heating when  
the air temperature falls below the thermostat setting, and switching it off once this set  
temperature has been reached.  
If your heating system is a boiler with radiators, there will usually be only one programmable room thermostat  
to control the whole house. But you can have different temperatures in individual rooms by installing  
thermostatic radiator valves (TRVs) on individual radiators. If you don’t have TRVs, you should choose a  
temperature that is reasonable for the whole house. If you do have TRVs, you can choose a slightly higher  
setting to make sure that even the coldest room is comfortable, then prevent any overheating in other rooms  
by adjusting the TRVs.  
So, a programmable room thermostat lets you choose what times you want the heating  
to be on, and what temperature it should reach while it is on. It will allow you to select different temperatures in  
your home at different times of the day (and days of the week) to meet your particular needs.  
The time on the programmer must be correct. Some types have to be adjusted in spring and autumn at the  
changes between Greenwich Mean Time and British Summer Time.  
Turning a programmable room thermostat to a higher setting will not make the room heat up any faster. How  
quickly the room heats up depends on the design of the heating system, for example, the size of boiler and  
radiators.  
You may be able to temporarily adjust the heating programme, for example, ‘Override’, ‘Advance’ or ‘Boost’.  
These are explained in the manufacturer’s instructions.  
Neither does the setting affect how quickly the room cools down. Turning a programmable room thermostat to  
a lower setting will result in the room being controlled at a lower temperature, and saves energy.  
Programmable room thermostats need a free flow of air to sense the temperature, so they must not be  
covered by curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent  
the thermostat from working properly.  
The way to set and use your programmable room thermostat is to find the lowest temperature settings that  
you are comfortable with at the different times you have chosen, and then leave it alone to do its job. The best  
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About your new wireless thermostat  
QUICK START GUIDE  
The THR872CUK is an easy-to-use thermostat designed to maintain a comfortable environment when you are  
at home and reduce energy costs when you are away.  
Your new thermostat is pre-programmed and ready to go. Just check the steps below and change  
settings if needed:  
Features  
1
Install and set up thermostat & relay box  
if this has not been done by a professional installer).......................................................... See pages 20-31  
(
•
Energy-saving design: Automatically adjusts indoor temperature up to six times per day to maintain  
optimum comfort when you’re at home, and reduce costs during working hours when you are away. Each  
day of the week can be programmed separately (see pages 12-13).  
2
3
Select heating (default) or cooling mode................................................................................... See page 10  
Customise heating and cooling program settings if necessary.................................................. See page 13  
•
•
•
•
One-touch comfort control: Allows you to override programmed settings at any time by setting the  
indoor temperature manually (see page 15).  
Display screen options: To change the date, time or display screen language, see pages 9 and 28.  
Day Off button: Sets the system to your preferred Sunday program on any day of the week to maintain a  
comfortable environment when you stay home from work (see page 16).  
Party button: Temporarily overrides the normal program schedule for 1 to 23 hours to maintain a  
comfortable temperature while you are entertaining guests (see page 17).  
Holiday button: Maintains a cost-saving temperature level for up to 99 days while you are away, then  
resumes normal operation when you return (see page 18).  
•
•
Summer/Winter time change: Automatically adjusts the clock for standard time or daylight savings time.  
Optimum Start: Automatically turns on heating system as early as needed so indoor temperature reaches  
the level you want at the time you set.  
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Quick reference  
Date/time settings  
Press to set time  
see page 9)  
Current  
time  
Current  
day/date  
Heating system Low battery  
is on warning  
Current room Status text  
temperature  
Press to change  
temperature  
Day Month Year  
Press the DAY button to set the date and time.  
(
(
see page 15)  
Use the + or - buttons to set the correct day, then press the OK  
button. Follow the same procedure to set month, year and time. On  
completion, the screen will display “Changes saved.”  
2
9/12/10  
Press to set date/day  
see page 9)  
Press to check target  
temperature  
(
Date and time should not need to be changed if set properly during  
initial installation (see page 24).  
(see page 15)  
Thu 30/12/10  
SET THE DAY  
Press to copy a daily  
program schedule  
PM  
°
12:34 23.  
5
Room Temp  
Operating modes  
see page 11)  
(see page 13)  
(
30/12/10  
Automatic  
Manual  
Off  
NOTE: To adjust only the time, press the + or - button. It is not  
necessary to press the DAY button.  
“
Day Off” button  
see page 16)  
AUTO MAN OFF  
(
Day OK?  
“
Party” button  
see page 17)  
(
3
0/12/10  
Remove cover to use  
controls  
“
Holiday” button  
see page 18)  
(
Battery compartment  
see page 24)  
Press to change program  
schedules (see page 13)  
“OK” button  
(
Set the month  
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Operation and Programming  
homexpert by Honeywell THR872CUK Wireless Programmable Thermostat  
Heating or cooling control  
Operating modes (auto, manual, off)  
Press and hold both buttons for 5 seconds  
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.  
Auto: Program controls temperature  
Press the mode buttons to select how the thermostat operates:  
Thu 30/12/10  
Auto: In this mode the thermostat follows a program  
schedule to maintain a comfortable temperature when you  
are home and reduce energy costs while you are away (see  
pages 12-13).  
Thu 30/12/10  
°
2:34 23.  
5
Room Temp  
PM  
°
PM  
To switch between heating and cooling, press and hold the p and q  
buttons until the screen changes.  
1
2:34 21.  
0
1
Room Temp  
Manual: This mode turns off the program schedule to  
maintain a constant temperature. Press the p or q  
buttons to set the temperature you want. The temperature  
will remain at the level you set until you change it, or until  
you press AUTO to resume the program schedule.  
AUTO MAN OFF  
NOTE: The thermostat will not switch to cooling control unless you  
enable this feature (see pages 30-31).  
Manual: Press p/q to set temperature  
Heating changes to cooling  
NOTE: Program schedules for heating and cooling must be set  
separately (see page 13).  
Thu 30/12/10  
Thu 30/12/10  
PM  
°
1
2:34 23.  
5
Off: When the thermostat is off, the heating system runs  
only as needed to maintain a minimum temperature to  
protect your home. This level is set at 5°C, but you can  
change it if necessary (see page 28).  
PM  
°
5
12:3C4ooling23.  
Room Temp  
AUTO MAN OFF  
NOTE: You can press any of these buttons — Auto, Manual or Off —  
to cancel any programming task and exit without saving changes.  
1
0
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Operation and Programming  
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Default program schedules  
To adjust program schedules  
This thermostat is pre-set to maintain a comfortable temperature when you are at home, and energy-saving  
levels when you are away or asleep. The default program schedules are shown below. To change them, see  
pages 13-18.  
To customise the program schedules, first make sure the system  
you want to program (heating or cooling) is selected (see page 10).  
Heating and cooling schedules must be programmed separately.  
MON  
AM  
°
°
6
:30 21.  
0
SET TIME 1  
1
Press <, then adjust the time and temperature for Period 1 as  
Monday-Friday  
Time  
Period 1  
6:30  
21°C  
1
2
3
4
5
6
shown at left.  
1
2
3
4
5
6
8:00  
18°C  
2
12:00  
21°C  
3
14:00  
18°C  
4
18:00  
21°C  
5
22:30  
16°C  
6
2
Press OK to advance to the next step, or press the > button to  
advance to the next time period. (See page 14 to delete unwanted  
time periods.)  
Temperature  
Saturday-Sunday  
Time  
AM  
6
:30 21.  
0
TIME 1 OK?  
8:00  
10:00  
12:00  
21°C  
14:00  
18:00  
23:00  
16°C  
3
After all Monday time periods are set, press the DAY button to  
1
2
3
4
5
6
customise settings for Tuesday and other days of the week.  
Temperature  
AM  
°
To stop programming at any time, press any MODE button (Auto,  
Manual or Off; see page 11).  
6
6
:30 22.  
5
Monday-Friday  
Time  
Period 1  
6:30  
24°C  
1
2
3
4
5
6
SET TEMP 1  
8:00  
28°C  
2
12:00  
24°C  
3
14:00  
28°C  
4
18:00  
24°C  
5
22:30  
24°C  
6
1
2
3
4
5
6
SHORTCUT: While programming, press the COPY DAY button to copy  
all settings for the current day and apply them to other days. For example,  
you can apply Monday settings to all other days of the week. After  
copying, press the DAY button to select a target day, then press OK.  
Temperature  
Saturday-Sunday  
Time  
AM  
°
5
:30 22.  
TEMP 1 OK?  
8:00  
10:00  
12:00  
14:00  
18:00  
23:00  
1
2 3 4 5 6  
Temperature  
24°C  
1
2
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Operation and Programming  
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To add or remove program time periods  
Temporary schedule overrides  
You can eliminate any unwanted time periods (2 through 6) if you  
require fewer than six per day.  
Current temperature  
When idle, the thermostat displays the current room temperature. You  
can press the i button at any time to see the “target” temperature the  
thermostat is trying to maintain.  
MON  
Thu 30/12/10  
AM  
°
6
:30 21.  
0
1
Press the < or > buttons repeatedly to select a time period (or  
press the DAY button to select a different day).  
PM  
°
1
2:34 20.  
5
Press the p or q buttons to change the temperature temporarily.  
SET TIME 1  
Room Temp  
1
2
3
4
5
6
2
Press and hold the i button for at least two seconds to remove  
the selected time period. The temperature will remain at the level  
set for the previous time period until the following period begins.  
In Auto mode, the thermostat will maintain the temperature you  
set until the next program time period begins. It will then revert to  
the level programmed for that time period. To maintain a constant  
temperature for longer periods of time, switch to Manual mode (see  
page 11).  
AUTO MAN OFF  
PM  
°
0
Desired temperature  
1
2:00 21.  
Thu 30/12/10  
SET TIME 3  
To restore a disabled time period, follow the procedure above to  
select the disabled period, then press and hold the i button for at  
least two seconds to restore it.  
1
2
3
4
5
6
°
0.5  
PM  
12:34  
2
Press and hold  
TARGET TEMP  
PM  
°
NOTE: See also temporary program overrides for holidays, parties or  
days when you stay home from work (see pages 16-18).  
-
-:-- --.  
-
AUTO MAN OFF  
Set to override present time period  
DISABLED  
1
2 3 4 5 6  
Thu 30/12/10  
PM  
°
2:34 23.  
0
TARGET TEMP  
1
AUTO MAN OFF  
1
4
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Special Functions  
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Temporary schedule overrides — Day Off  
Temporary schedule overrides — Party  
In Day Off mode, the system runs the Sunday program schedule on  
days when you stay home. The Sunday schedule should maintain a  
comfortable temperature all day long (see page 12).  
The Party feature temporarily overrides the program schedule to  
maintain a comfortable temperature while you entertain guests. You  
can also use it to set an energy-saving temperature level if you will be  
away from home for several hours.  
MON 27/12/10  
SUN 26/12/10  
°
20.5  
PARTY DURATION  
1
DAYS  
1
hr  
1
2
Press the DAY OFF button.  
DAYS OFF  
1
2
Press the PARTY button.  
Press + or - to select the number of days you will stay home (up  
to 99 days), then press OK to save.  
Press + or - to select the number of hours (1 to 23 hours), then  
press OK to save.  
Set number of days off  
Set number of hours, then press OK  
After the last “day off,” the temperature will resume the normal  
program schedule. To cancel the Day Off feature at any time, press  
the DAY OFF button again. The “day off” symbol will disappear and  
the system will resume normal operation.  
WED 29/12/10  
SUN 26/12/10  
3
Press the p or q buttons to set the temporary temperature, then  
press OK to save and exit.  
°
3
DAYS  
3
hr  
20.5  
When the timer expires, the temperature will revert to the previous  
level (set manually, or by the program schedule if in Auto mode). To  
cancel the Party mode at any time, press the PARTY button again.  
DAYS OFF  
PARTY DURATION  
NOTE: This feature works only when the thermostat is in Auto mode  
(
see page 11).  
Set desired temperature, then press OK  
NOTE: This feature works only when the thermostat is in Auto or  
Manual mode (see page 11).  
SUN 26/12/10  
SUN 26/12/10  
PM  
°
1
2:34 23.  
0
°
ROOM TEMP  
3
hr  
24.0  
temp ok?  
AUTO MAN OFF  
1
6
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Special Functions  
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Temporary schedule overrides — Holiday  
Advanced features  
•
Optimum Start: This is an energy-efficient feature that adjusts the start time of your heating system. For  
example, on cold days your heating system will start earlier to ensure that your home is warm when you  
wake in the morning. On warmer days, heating will begin later to save energy costs. (See page 29 to turn  
on this feature.)  
The Holiday feature maintains a constant energy-saving temperature  
while you are away for an extended time (up to 99 days).  
MON 27/12/10  
°
10.0  
1
2
Press the HOLIDAY button.  
1
DAYS  
RETURN DATE OK?  
•
•
Summer/winter time change: The thermostat automatically changes the clock time to correspond with  
changes to and from daylight savings time. (See page 28 to turn off this feature.)  
Press + or - to select the number of days you will be away (up to  
9
9 days), then press OK to save.  
Temperature offset: In some cases, the thermostat must be installed in a location that does not  
accurately control temperature for optimum comfort in other rooms. You can set the thermostat to  
compensate for this by adjusting the offset (see page 29).  
Set number of days, then press OK  
3
Press the p or q buttons to set the temperature during your  
absence, then press OK to save and exit.  
SUN 09/01/11  
°
To cancel the Holiday mode at any time, press the HOLIDAY button  
again.  
1
0.  
0
•
•
Proportional band width: If your heating system is oversized for your home, you can compensate by  
increasing the width of the control proportional band up to 3°C (see page 29).  
1
4
DAYS  
RETURN DATE OK?  
NOTE: This feature works only when the thermostat is in Auto or  
Manual mode (see page 11).  
Cycle rate and minimum boiler on/off time: Adjusting these features can help your climate control  
system work more efficiently for increased comfort and economy. See page 31 to find recommended  
settings for your system.  
Set temperature, then press OK  
SUN 09/01/11  
°
10.0  
14  
DAYS  
TEMP OK?  
1
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System installation  
Install relay box  
Installation procedure  
The relay box is wired directly to your heating  
or cooling equipment. The thermostat  
communicates with the relay box using a  
wireless RF signal to control the system. Do not  
install near metal objects or electronic devices  
1
2
3
Install relay box  
Connect system wiring  
Wireless  
thermostat  
Activate batteries and install  
wireless thermostat  
(
TV, sound system, PC, etc.).  
1
2
Make sure electrical power is off.  
4
Setup and test system operation  
Use a screwdriver to release latch and  
remove relay box cover.  
Relay box  
3
Mount wall bracket as shown at left. Install  
at least 30 cm from any metal objects such  
as metal wall boxes and metal equipment  
enclosures.  
System  
wiring  
Heating/cooling systems  
4
Connect system wiring as shown on pages  
22-23, then replace relay box cover.  
NOTE: If you are not experienced in equipment installation, we recommend that these  
procedures be done by a professional installer.  
DISCONNECT ELECTRIC POWER BEFORE INSTALLATION: Can cause electrical shock or  
equipment damage.  
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Connect system wiring  
Wiring diagrams  
Connect wiring from your heating or cooling  
equipment to the relay box as shown at left. See  
wiring diagrams on page 23 for details.  
Burner (direct control)  
Combi boiler  
1
2
Make sure electrical power is off.  
Strip insulation to expose about 6 mm of  
bare wire.  
3
4
Use a screwdriver to loosen terminal screw,  
insert wire into slot, then tighten screw.  
Replace relay box cover, then restore  
electrical power.  
N L L  
A B C  
Zone valve  
Cooling device  
Wiring terminals  
NOTE: All wiring must comply with IEE  
regulations. Keep AC mains supply/load cables  
separate from equipment wiring. Refer to boiler  
manufacturer’s instructions for information  
about wiring connections.  
2
.5 - 2.5 mm  
Terminal screws  
1
6
mm max.  
2
2
23  
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Activate batteries and test thermostat  
Choose location and install thermostat  
Remove thermostat cover and battery compartment cover, then  
discard the plastic tab inside to activate the batteries. The first time  
you do this, you will be prompted to set the date, time and preferred  
screen language. After this, you should check to make sure the  
thermostat can communicate with the relay box.  
Install the thermostat on a wall or table about 1.2 to  
1.5 metres above the floor. To check a location, set the  
thermostat to Test mode (see page 24), then check to verify  
that the green light on the relay box is still flashing. If it does  
not flash, find another location closer to the relay box  
1
2
3
Make sure electrical power is on and thermostat is set to  
OFF mode (see page 11).  
Remove cover and discard plastic tab  
inside to activate batteries  
•
Do not install near sources of hot or cold air (radiators,  
Wall mounting  
windows, heating or cooling ducts).  
Hold the thermostat 2-3 metres from the relay box, then press  
and hold the buttons shown at left until TEST TRANSMIT appears.  
Press OFF, then press and hold these  
buttons to test  
•
•
Install at least 30 cm from metal objects.  
If the system is working properly, a green light on the relay box  
should begin flashing. If nothing happens, or if the red light begins  
flashing, see “In Case of Difficulty” on page 32.  
Install at least 1 metre away from other electronic devices  
TEST TRANSMIT  
(
TV, sound system, PC, etc.).  
To exit Test mode at any time, press any MODE button (Auto, Manual  
or Off; see page 11).  
Table stand  
assembly  
NOTE: This symbol will flash on the screen when battery  
power is low. Remove cover as shown at left and replace  
batteries with two fresh AA alkaline batteries.  
Green light on  
relay box should  
begin flashing  
2
4
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Installation and Setup  
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System test  
Installer setup  
Press OFF, check heating unit  
After installation, you should check to make sure the system is  
working properly.  
Installer settings allow you to customise how your system  
works. Check the tables on pages 28-31 to see if any settings  
need to be changed.  
Thu 30/12/10  
Thu 30/12/10  
PM  
°
1
2
Press the thermostat OFF button.  
12:34 23.  
5
PM  
°
Room Temp  
To change installer settings:  
1
2:34 23.  
5
Check the power supply to make sure the system is on and the  
green light on the relay box is off.  
Room Temp  
AUTO MAN OFF  
1
2
Press the thermostat OFF button.  
AUTO MAN OFF  
Press and hold to enter installer mode  
3
Press the thermostat MAN button, then press the p button to  
Press and hold the i, < and > buttons until the screen  
raise target temperature to maximum (35°C).  
changes.  
Press MAN, set temperature to 35°C  
If the system is set up properly, the “heating” symbol should  
appear on the thermostat display, the heating system should  
begin running, and the green light on the relay box should be on.  
You can switch between OFF and MAN several times to verify that  
the system is operating properly.  
3
4
Press the + or - button to scroll through functions quickly  
until you find one you want to change.  
Thu 30/12/10  
PM  
°
Press the p or q buttons to change any setting, then  
press OK to save the new setting.  
1
2:34 35.  
0
1
:CL 12  
TARGET TEMP  
CLOCK SELECT  
To exit installer setup, press any MODE button (Auto,  
Manual or Off).  
4
To stop the test, press AUTO to run the program schedule, or  
MAN to reset the temperature manually. (If you select Manual  
control, reduce the target temperature to an appropriate level.)  
AUTO MAN OFF  
1
2
Make sure heating symbol appears  
Press to scroll  
through functions  
Press to change  
setting  
Thu 30/12/10  
See tables on pages 28-30 for  
complete list of functions and settings  
PM  
°
1
2:34 35.  
0
2
6
27  
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Installation and Setup  
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Installer setup functions — Thermostat settings  
Installer setup functions — Thermostat settings  
** Factory default setting  
** Factory default setting  
Function  
Description  
Clock format  
Setting Options  
24: 24-hour time format **  
2: AM/PM 12-hour time format  
0: Schedule customised by user  
: Reset schedule to factory default (see page 12) **  
0: No change  
: Automatically switch to/from daylight savings time **  
Function  
Description  
Optimum start  
Setting Options  
1
2
3
4
5
6
7
: CL  
: rP  
: tC  
: LA  
: bL  
: uL  
: LL  
8: OP  
0: Off **  
1
1: On (see page 19 for description)  
Reset program schedule  
Summer/winter time change  
Display screen language  
Screen backlight  
12: tO  
13: Pb  
19: FS  
Temperature offset  
0: No offset **  
1
Options: +3° to -3°C (see page 19 for description)  
Proportional band width  
RESET TO FACTORY DEFAULT  
1.5°C **  
1
Options: 1.5° to 3°C (see page 19 for description)  
Default language varies by location of purchase. Press the  
p or q buttons to select an alternate language.  
0: No change  
1: Select 1 to restore default settings. All customised  
settings will be lost.  
0: Off  
1
: Screen lit when button is pressed **  
See page 27 to change these settings. Always press OK after changing any setting.  
Maximum temperature allowed  
Minimum temperature allowed  
35°C **  
Options: 21° to 35°C  
5°C **  
Options: 5° to 21°C  
See page 27 to change these settings. Always press OK after changing any setting.  
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Installation and Setup  
homexpert by Honeywell THR872CUK Wireless Programmable Thermostat  
Installer setup functions — System settings  
Customised settings for your system  
Enter Installer Setup (see page 27), then press > for access to system settings  
** Factory default setting  
Function  
Description  
Setting Options  
Your heating system  
Changes required  
Setting Options  
No change  
1
2
4
5
7
: Ot  
: Cr  
Minimum boiler on time  
1 minute **  
Standard gas boiler  
(<30kW)  
None  
None  
Options: 1 to 5 minutes  
See page 31 for important information  
Zone Valve  
Oil boiler  
No change  
Cycles per hour (CPH)  
Heating/Cooling options  
Pump exercise  
6 cycles per hour **  
System setting 1: Ot  
System setting 2: Cr  
Set to 4 minutes  
Set to 3 CPH  
Options: 3, 6, 9 or 12  
See page 31 for important information  
Thermal actuator  
Electric heating  
System setting 2: Cr  
System setting 2: Cr  
Set to 12 CPH  
Set to 12 CPH  
: HC  
: PE  
: LC  
0: No central cooling system installed **  
: Allows switching between heating and cooling systems  
Thermostat cannot control cooling unless you select 1  
1
0: Off **  
1
Your cooling system  
Changes required  
Setting Options  
: On (turns on pump periodically to keep equipment  
functioning properly)  
Heat pump/air conditioner  
System setting 1: Ot  
System setting 2: Cr  
System setting 4: HC  
Set to 4 minutes  
Set to 3 CPH  
Set to 1  
Behaviour when relay box cannot  
communicate with thermostat  
0: Relay box turns off **  
1: Relay box operates 20% on / 80% off  
Fan coil  
System setting 4: HC  
Set to 1  
See page 27 to change these settings. Always press OK after changing any setting.  
NOTE: After changing the above settings to accommodate a cooling system, you can switch the thermostat to  
control either heating or cooling (see page 10).  
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Appendix  
homexpert by Honeywell THR872CUK Wireless Programmable Thermostat  
In case of difficulty  
In case of difficulty (re-binding procedure)  
If you must replace a wireless thermostat or relay box, the system  
may not work properly afterward. Follow the steps below to  
re-establish wireless communication.  
Thermostat screen  
is blank  
•
Make sure two fresh AA alkaline batteries are properly installed (see  
page 24).  
Heating or cooling  
system does not  
respond  
•
•
Check thermostat batteries (see above).  
1
Hold thermostat about 1 or 2 metres from the relay box, then  
press and hold the relay box button for 15 seconds.  
Make sure heating and cooling systems have power. Check fuses and  
circuit breakers and replace or reset as needed.  
Press and hold relay box button  
(steps 1-2)  
Note: After 5 seconds the red light flashing pattern will change,  
but you must hold down the button for at least 15 seconds.  
•
•
Check wiring (pages 22-23) and system configuration (pages 30-31).  
If red light on relay box is on, the thermostat and relay box may not be able  
to communicate. See “Rebinding Procedure” on page 33.  
Press and hold these thermostat buttons (step 4)  
2
3
4
5
Release the relay box button, then press and hold it again for 5  
seconds, until the red light flashes evenly (“binding” mode).  
CONTROL BINDING  
•
If above remedies cannot resolve the problem, the thermostat may  
have to be moved. Try a location closer to the relay box, or farther  
away from interference by metal objects or electronic devices such as  
televisions, sound systems, PCs, etc.  
Release the relay box button, then press the thermostat OFF  
button.  
Press and hold the thermostat p, q and < buttons until  
CONTROL BINDING appears on the display screen.  
Desired temperature  
cannot be maintained  
•
If above remedies cannot resolve the problem, the thermostat may  
have to be moved. Make sure it is not installed near sources of hot or  
cold air (radiators, windows, heating or cooling ducts).  
Press the thermostat OK button to signal the relay box. The red  
light on the relay box should turn off. If not, wait a few seconds,  
then press OK again.  
Press thermostat OK button (step 5). Relay box  
red light should turn off.  
6
Relocate and test the thermostat, as shown on page 24.  
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Appendix  
homexpert by Honeywell THR872CUK Wireless Programmable Thermostat  
Limited Warranty  
Declarations, disposal and recycling  
Honeywell warrants this product for 1 year from date of purchase. We undertake to replace or  
Declaration  
repair at our discretion, products should they become defective within 1 year solely as a result  
of faulty materials and or workmanship.  
Honeywell hereby declares that this wireless product is in compliance with the essential  
requirements and other relevant provisions of the Radio and Telecommunications Terminal  
Equipment (R&TTE) directive, 1999/5/EC.  
Understandably if the product has not been installed or maintained in accordance with  
Honeywell’s instructions, has not been used appropriately or if any attempt has been made to  
rectify, dismantle or alter the product in any way the warranty will be invalidated.  
Disposal and recycling  
This product warranty states Honeywell’s entire liability. It does not extend to cover  
consequential loss or damage or installation costs arising from a defective product.  
Batteries and waste electrical products should not be disposed of with household waste.  
Please recycle where these facilities exist. Check with your local authority or retailer for  
recycling advice.  
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.  
tm  
Please retain these instructions for future reference.  
If you require further information about this product, call the homexpert by Honeywell  
technical helpline on 0845 604 2893.  
For a full list of terms and conditions please visit www.homexpertbyhonyewell.com.  
©
2010 Honeywell International Inc.  
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Need Help?  
For assistance with this product please visit www.homexpertbyhoneywell.com, or call  
Honeywell Customer Care at 0845 604 2893.  
Honeywell  
The Arnold Centre  
Paycocke Road  
Basildon, Essex  
SS14 3EA  
Technical Help Desk: 0845 604 2893  
www.homexpertbyhoneywell.com  
50051985-001 Rev. A  
© 2010 Honeywell International Inc  

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