Honeywell CM927 Manual
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The Honeywell CM927 is a wireless programmable room thermostat designed to control you heating system efficiently, providing comfortable temperatures when you are at home and energy savings when you are away. With wireless communication there is no need to provide a wired connection between the thermostat and boiler. The following instructions explain how to set up, program and operate your Honeywell CM927 Programmable Room Thermostat.
Wireless connection to the boiler allows you to mount the Chronotherm in your room without decor disruption Armchair programming feature lets you program your Chronotherm while resting comfortably in your armchair Ergonomic User Interface features an OK-button making the CM927 very easy to use so you always stay in control. LoT Technology provides informative on-screen feedback and operational assistance to the user. Extra Large LCD (Liquid Crystal Display) Screen with Backlight provides added user friendliness and clearer viewing even in the dark. 7-day heating program lets you set the CM927 independently for each day of the week to match your lifestyle, whilst maximizing energy savings. 6 independent temperature levels per day lets you set any 6 temperatures you require (from 5 to 35C) so you can enjoy economical comfort every day Holiday button saves energy by letting you reduce the temperature for 1 to 99 days while you are away from home, resuming normal operation on your return. Party button lets you temporarily maintain (or adjust) the current temperature for 1 - 23 hours. Useful when you have guests or leave the house for a short period.
Honeywell Control Systems Ltd. Arlington Business Park, Bracknell Berkshire RG12 1EB Technical Help Desk: www.honeywelluk.com 42011077-703 RHoneywell International Inc.
CM927 - User Guide
7 day Wireless Programmable Room Thermostat with LoT Technology
Day Off button copies Sundays program into any other day of the week, so that you can make the CM927 follow this program if you have a day or days off. Automatic Summer/Winter Time Change will adjust the clock automatically for Daylight Saving Time. Built-in Memory holds the user program indefinitely so that it is never lost even if you remove the batteries. Optimum Start option is an advanced feature which ensures that the optimum temperature conditions are achieved at the required times (option set by your installer).
GETTING STARTED WITH the CM927
WHAT IS A PROGRAMMABLE ROOM THERMOSTAT?
.an explanation for householders
STEP 1: Installing the Batteries.. 3. STEP 2: Setting the Date and Time.. 4. STEP 3: Running the Built-In Heating Program.. 4 Programming the CM927 The Built-in Heating Program.. 5. Reviewing the Heating Program.. 5 Modifying the Heating Program... 5 Disabling / Enabling Time Periods.. 7
(The following explanation applies to heating applications only) 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. 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. 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. 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. 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 way to do this is to set low temperatures first, say 18C, and then turn them up by one degree each day until you are comfortable with the temperatures. You wont have to adjust the thermostat further. Any adjustments above these settings will waste energy and cost you more money. 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 dont 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. 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. You may be able to temporarily adjust the heating programme, for example, Override, Advance or Boost. These are explained in the manufacturers instructions. 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.
Manufactured for and on behalf of the Environment and Combustion Controls Division of Honeywell Technologies Srl, Ecublens, Route du Bois 37, Switzerland by its Authorised Representative Honeywell International Inc.
DATE PROG AUTO MAN OFF
operating the CM927 Choosing the Operating Mode.. 8 AUTO mode... 8 MAN mode... 8 OFF mode... 8 During Normal Operation.. 8 Temperature Enquiry.. 8 Temperature Override... 9 Using the Special Functions... 9 HOLIDAY Function... 9 PARTY Function.. 10 DAY OFF Function.. 11 Adjusting the Time... 11 fine tuning the CM927 Changing the User Parameters.. 12 Change the Time Format.. 13. Reset the Built-in Program.. 13. Summer / Winter Time Change.. 13 FAQs & troubleshooting Trouble Shooting Guide... 14 Frequently Asked Questions.. 16. WHAT IS A PROGRAMMABLE ROOM THERMOSTAT? An explanation for householders.. 19
Day / Date Display Time Display LoT Technology Display Heating On Indicator Battery Low Indicator Temperature Display Temperature Change Buttons Temperature Enquiry Button Slider Switch
Program Buttons Battery Compartment Lid Battery Compartment Holiday Function Button Party Function Button Day Off Function Button Copy Day Button Day Select Button Time Change Buttons
10 Green OK Button
GETTING STARTED WITH THE CM927
This section shows you how to setup and run the thermostat in 3 simple steps:
STEP 1: Installing the Batteries
Note: Please follow the instructions in this section only if the thermostat screen is blank (no symbols or digits are displayed). If the screen displays some information move on to STEP 2: Setting the Date and Time. To install the Batteries: a. Lift up the front cover of the thermostat to reveal the battery cover and product controls. b. Remove the battery cover by pressing down and sliding out. c. Insert the 2 x AA LR6 Alkaline Batteries supplied with the thermostat, ensuring the correct orientation (see Controls Layout on page 2). d. After a short pause the thermostat will display information on the screen and is now ready for use. e. Replace the battery cover by sliding it firmly back into the front of the thermostat.
PLEASE RESPECT YOUR ENVIRONMENT! Take care to dispose of used batteries carefully.
STEP 2: Setting the Date and Time
To set the Date and Time: a. Move the slider switch to the DATE position. SET THE DAY will be displayed on the screen and the day digits will be flashing.
b. Use the or buttons to set the correct day. When either of these buttons are pressed DAY OK? will be displayed. Once the correct day is reached, press the green button to confirm. c. Now the month digits will start flashing and SET THE MONTH will be displayed. Change the month and then the year using the or buttons, pressing the green button to save any changes made. (If an invalid date has been entered you will be returned to the start of the date setting mode). d. After setting a valid date, the time digits will begin flashing and SET THE TIME will be displayed. e. Use the or buttons to set the correct time. Each press of the button will change the time by one minute and holding the button down will change the time slowly at first and get progressively quicker. Once the correct time is set, press the green button to confirm then CHANGES SAVED will be displayed for a moment followed by DATE COMPLETE. Note: If the slider switch is moved at any time before DATE COMPLETE is displayed the changes to the date and time will NOT be saved.
STEP 3: Running the Built-in Heating Program
The thermostat is now ready for operation. Move the slider switch to the AUTO position and the built-in heating program will start running. The built-in heating program has been designed to provide normal comfort requirements, but if you want to customise the default settings (as shown on the next page) please see the next section PROGRAMMING THE CM927.
programming THE CM927
The Built-in Heating Program
The built-in heating program has 6 temperature level changes per day that can be set between 3.00am and 2.50am the following day - allowing you to maintain the evening temperature after midnight. Each temperature level can be set between 5C and 35C, and adjusted in 0.5C increments. The factory default program for heating is as follows: Monday to Friday Period Time Temperature Saturday & Sunday Period Time Temperature 1 8:00 21C 2 10:00 21C 3 12:00 21C 4 14:00 21C 5 18:00 21C 6 23:00 16C 1 6:30 21C 2 8:00 18C 3 12:00 21C 4 14:00 18C 5 18:00 21C 6 22:30 16C
Reviewing the Heating Program
To review or edit the heating program move the slider switch to the PROG position then use the or buttons to navigate between the 6 individual programming periods for Monday. Use the DAY button to step through each day of the week, so the complete 7 day heating program can be reviewed or edited.
Modifying the Heating Program
To change the heating program: a. Set the slider switch to the PROG position, entering programming mode. SET TIME 1 will be displayed and the time settings for period 1 on Monday (MON) will be flashing. The active period is highlighted by a flashing square symbol around the numbers at the bottom of the screen and the selected day is flashing in the top left hand corner of the screen.
b. To adjust the period start time press the or buttons and TIME 1 OK? will be displayed. Holding the button down will change the time quickly. Note: If you are pressing the or buttons and the display flashes the next change period, it means the next change will be pushed forward if you continue to press or buttons). c. Press the green button to confirm the setting. CHANGES SAVED is displayed for 1.5 seconds then SET TEMP 1 will be shown. Note: If the original time setting did not require adjustment press the green button to move on to step d. d. The temperature setting for period 1 on Monday (MON) will now be flashing. To adjust this press the or buttons and TEMP 1 OK? will be displayed. e. Press the green button to confirm the setting. CHANGES SAVED will be displayed for a moment followed by SET TIME 2. f. The next time and temperature period will now be active. Adjust this by repeating steps b - e above until all 6 periods are set for Monday or move the slider switch to the AUTO position to run the program as set, at any time. g. After setting period 6 CHANGES SAVED will be displayed as before, followed by DAY COMPLETE. You now have a choice of how to set the program for the next day: h. To COPY the Mondays program to another day: Press the COPY DAY button to copy Mondays program into Tuesday. The display will go blank apart from COPY MON TO, indicating the program for Monday will be copied to the selected target day, which is flashing in the top left corner of the display. To select a different target day press the DAY button to cycle through the days. Once the required day is flashing accept it by pressing the green button. Note: Once the target day is confirmed it becomes the day that is copied if the COPY DAY button is pressed again. OR To program a different day: Press the DAY button to select the next day, which is displayed in the top left corner of the display. The program for that day can then be adjusted by following steps b - g above. Programs for the remaining days can be set in the same way, using the DAY button to move to the next day.
i. To exit the programming mode move the slider switch to the desired operating mode - AUTO, MAN or OFF. Note: To run the adjusted program select the AUTO mode. Note: If the unit is left in programming mode for more than 10 minutes without the slider being moved or any buttons pressed, MOVE THE SLIDER will be displayed. Press a button to finish programming the thermostat or move the slider to select the desired operating mode.
Disabling / Enabling Time Periods
The thermostat has 6 periods each day that can be programmed, but you may not need all of these switch points for your heating requirements. Therefore, any period from 2 to 6 can be disabled or enabled as follows: To disable time periods: Go to the desired period ( 2 to 6 ) by moving the slider switch to the PROG position, then using the , and DAY buttons to navigate, ensuring the correct period is highlighted with the flashing square symbol. Press and hold the button for at least 2 seconds and the display will indicate the period has been removed from the program.
To enable time periods: Navigate to the disabled period by moving the slider switch to the PROG position, then using the or and DAY buttons. Once selected DISABLED will be displayed. Press and hold the button for at least 2 seconds and ENABLED will be displayed for a moment before returning to normal programming mode.
operating THE CM927
Choosing the Operating Mode
The thermostat can operate in three different modes: Automatic, Manual or Off. To set the operating mode move the slider switch to the desired position. The screen indicates which mode is currently active by displaying AUTO, MAN or OFF. AUTO (automatic) mode Automatic mode sets the thermostat to follow the temperature program (default or personalised). Operating the thermostat in this mode is the best way to maintain a high level of temperature comfort whilst maximising your energy savings.
MAN (manual) mode Manual mode sets the thermostat to act as a simple thermostat with a fixed setpoint throughout the day. The setpoint can be adjusted from 5C to 35C by using the or buttons. The thermostat will continue to maintain this temperature until another operating mode or temperature is selected.
OFF mode Off mode sets the thermostat to control to a minimum temperature setting of 5C (default) that acts as a frost protection measure for your home. This value can be adjusted by calling your installer.
During Normal Operation
Temperature Enquiry In AUTO and MAN operating modes the thermostat will display the current room temperature, which is indicated by the text ROOM TEMP displayed on the screen. To review the programmed target temperature (the temperature which the thermostat is trying to maintain) press the button. This target temperature value will be displayed flashing and the text TARGET TEMP will be shown for 5 seconds before returning to the current room temperature value. In OFF operating mode the thermostat again displays the current room temperature, as above, but when the button is pressed the text FROST TEMP is displayed indicating the set value to protect your home. To modify this value please contact your installer.
Temperature Override During normal operation (AUTO mode) the programmed temperature can be adjusted manually by pressing the or buttons. The target temperature will be displayed and flash for 5 seconds during this time the or buttons can be used to modify the set value. Note: This temperature override is cancelled at the next programmed temperature change.
Using the Special Functions
HOLIDAY Function The holiday function allows you to set a constant temperature (default = 10C) for a specified number of days (from 1 - 99 days). This lets you save energy and related costs when you are away from home, but resumes normal operation on the day of your return. To set the Holiday function: a. Move the slider switch to the AUTO or MAN position. b. Press the button to display the holiday days counter and temperature setting, along with the holiday indicator. c. The day after the current day will be selected and RETURN DATE OK? will be displayed. Press the or time buttons to set the holiday time (days). Note: (The day and date will update according to the number of days selected). button to confirm the setting.
d. Press the green
e. CHANGES SAVED will be displayed for a moment followed by TEMP OK?. Press the or buttons to set the holiday temperature (5C - 35C) f. Press the green button to confirm the setting. HOLIDAY MODE will now be displayed on the screen until the return date is reached or the holiday mode is cancelled.
The thermostat will now control to the new temperature for the set number of days that your home is vacant. At midnight the holiday counter will be reduced by one until the selected number of days have passed. The thermostat will then return to normal operation as set by the slider switch position (AUTO or MAN position). To cancel the HOLIDAY setting or to exit the function at any time press the button a second time or move the slider switch to a different position.
PARTY Function The party function allows you to extend your heating program by a specified number of hours at a particular temperature before resuming with the normal temperature program. This is especially useful when you want to maintain or increase the temperature during a special occasion such as a party or when entertaining guests. This function can also be used to reduce the temperature when you leave the house for a short period (shopping, visiting friends, etc) thus saving energy and saving you money. To set the Party function: a. Move the slider switch to the AUTO or MAN position. b. Press the button to display the party hours counter and temperature setting, along with the party indicator. c. The text PARTY DURATION will now be displayed on the screen. Use the or buttons to set the number of hours (1 - 23 hours). d. Press the green button to confirm the setting.
e. CHANGES SAVED will be displayed for a moment followed by TEMP OK? Use the or buttons to set the desired temperature (5C - 35C). f. Press the green button to confirm the setting. PARTY MODE will now be displayed on the screen until the timer reaches zero or the party mode is cancelled. The unit will now control to the new temperature for the set number of hours then return to normal operation as set by the slider switch position (AUTO or MAN position). To cancel the PARTY setting or to exit the function at any time press the button a second time or move the slider switch to a different position.
DAY OFF FUNCTION The day off function allows you to temporarily run Sundays heating program for as many days as you desire. This is useful when you have a day off during your normal week or will, unintentionally, be at home on a workday due to illness, etc. To set the Day Off function: a. Move the slider switch to the AUTO position. button to display the days off counter, DAYS OFF will be b. Press the displayed and the day off indicator will appear. c. Press the or buttons to set the number of days (days) you would like the alternative heating program to run for. Note: (The day and date will update according to the number of days selected). button to confirm the setting.
e. On confirmation CHANGES SAVED will be displayed on the screen for a moment and then will return to the normal display, with the days off indicator displayed. The thermostat will now control to the alternative heating program for the set number of days before resuming with the normal heating program. To cancel the DAY OFF mode or to exit the function at any time press the button a second time or move the slider switch to a different position.
Adjusting the Time
To adjust only the time during normal operation use the or buttons to adjust the time and press the green button again to confirm any changes.
fine tuning THE CM927
Changing the User Parameters
The user mode allows you to modify some basic settings of the thermostat to meet your personal preferences. You can change the time display format (24hr or AM/PM), reset the heating program to the built-in settings and disable or enable the summer/ winter time change feature. To change any of these users parameters: a. Move the slider switch to the OFF position, then press and hold the approximately 5 seconds. button for approximately 5 seconds. button for
b. Once entered the following information will be shown on the screen:
c. Now choose which one of the following parameters you would like to change: i) Change the time format or CLOCK SELECT should be displayed on the screen - press the buttons to select the preferred time format (12=AM/PM format, 24=24hr format) and the display will flash, indicating a change has been made. To confirm this change press the green button. ii) Reset the built-in program to the factory default time button once. The display will show RESET PROGRAM. Press the Press the or buttons to select the preferred setting (0=user program, 1=factory program) and the display will flash, indicating a change has been made. To confirm this change press the green button. iii) Enable or disable summer/winter time change time button twice. The display will show AUTO CHANGE. Press Press the the or buttons to select the preferred setting (0=disabled/Off, 1=enabled/ On) and the display will flash, indicating a change has been made. To confirm this change press the green button.
d. To exit the user mode move the slider switch to the AUTO, MAN or OFF position.
Batteries not installed. Check to see if there are batteries in the battery compartment and the paper tab has been removed. Check that the batteries have been installed in the correctorientation. Replace with new batteries. Replace with new batteries.
The thermostat has a blank LCD screen. Incorrect battery orientation.
faqs & troubleshooting
Exhausted batteries. Batteries are exhausted and need replacing.
The thermostat shows a flashing symbol on the LCD screen.
The thermostats LCD display shows a symbol but the heating does not switch on.
The heating is not required at this moment.
The heat demand is send to the HC60NG as a value between 0-100%. The HC60NG will adjust the boiler on time to meet this requirement. That is why the heating will be off sometimes even if the symbol is displayed. To check if RF system is communicating properly press the button to increase the set temperature a few degrees above the current temperature. The heating should come on after a few seconds. Remove and re-insert the batteries in the thermostat. If the symbol does not clear itself in a few minutes call the installer.
Fault in thermostat
No power to heating system. Program does not call for heat. Move the slider switch to MAN and press or to increase the temperature a few degrees above the current room temperature. The heating should come on after a few seconds. Call electrical installer to check the boiler and HC60NG power supply as well as the connection between the boiler and the HC60NG. Hook the thermostat back on the wall bracket or replace the thermostat on the table stand in the position where RF communication was reliable. Call installer. NOTE: You can control the boiler manually when the RF communication is lost: Press the HC60NG push button to switch the boiler on and off. When the green LED is on the boiler is on. The thermostat not set correctly for your system. The thermostat not set correctly for your system. Call Installer. Check that there is power to the heating system.
The thermostats LCD display works but the heating does not switch on (HC60NG LEDs are off or green one is on).
Wrong electrical connection.
The red LED on the HC60NG is constantly on or flashing.
RF communication lost due to the wrong location of the thermostat. RF communication fault.
Heating switches ON or OFF too slowly or quickly.
Temperature swings between too hot and too cold.
How do I change the batteries on the CM927 when they run out? The thermostat constantly monitors the battery power level, which typically last for about 2 years before needing replaced. When the power is running low a flashing symbol will be displayed on the screen. To change the batteries follow the steps in the above section (STEP 1: Installing the Batteries on page 3), replacing the used batteries with new ones in step c. Note: While changing the batteries your program settings will be stored but you may need to adjust the time and date settings to be correct. How do I set one temperature for the whole day? To operate as a simple thermostat with one temperature for a period of time, move the slider switch to the MAN position. Adjust the manual temperature by pressing the or buttons. This can be set anywhere from 5C to 35C in 0.5C steps. The thermostat will continue to maintain this temperature until another operating mode is selected or the temperature is adjusted. What is Optimum Start? Optimum Start is a program which ensures that the optimum temperature conditions are achieved at the required times. This is an Energy Efficiency feature that adjusts the start time of your heating system depending upon how cold it is. For example, on cold days your heating system will be started earlier to ensure that your home is warm when you get up (at the target temperature) and on warmer days the heating system will be started later to save energy. So, if the Optimum Start Feature is used, then the time / temperature settings which are entered into the thermostat should be set to when you want to be warm by and not when you want the heating system to start. I want to use the table stand instead of wall mounted bracket. Where can I position the room unit? It is important to keep the room unit in a location where reliable RF communication was proven. Advise your installer where would you like to position the room unit and he will check if the RF communication is reliable in the selected location(s). Important: The Room Unit measures the temperature of the room where it is located. It is important that the placement of the Room Unit within the room is away from; draughts, direct sunlight and other heat sources. As this is a wireless device certain objects could interfere with the RF signal - Leave at least 30cm distance from any metal objects (including wall boxes) and at least 1 metre from any other electrical equipment eg. radio, TV, PC, etc.
How do I remove the thermostat from the table stand or wall bracket? After programming is finished always replace the thermostat back on the wall holder or table stand. Wall bracket Table stand
HC60NG Relay Box Controls Layout
Push button and relay status LEDs
What does it mean when the HC60NG relay box green LED is ON? Green LED indicates normal operation of the radio frequency system. When the green LED is ON the boiler is also ON. When the LED is OFF the boiler is OFF.
Can I use my CM927 to control my air-conditioning system? Yes, if your system has been set up correctly you can use your thermostat to control the cooling. To switch the thermostat between heating and cooling modes press the or buttons together for 5 seconds in any of the product operating modes (AUTO, MAN or OFF). The text COOLING will be displayed for a moment on the screen to indicate the cooling operation is now active. The factory default program for cooling is specified in the table below, but this can be modified in the same way as the default heating program: Monday to Friday Period Time Temperature Saturday & Sunday Period Time Temperature 1 8:00 24C 23456 10:00 24C 12:00 24C 14:00 24C 18:00 24C 23:00 24C 1 6:30 24C 23456 8:00 28C 12:00 24C 14:00 28C 18:00 24C 22:30 24C
If something happens to my heating system how can I check that the thermostat is working? Refer to the Troubleshooting Guide on page 17. If you still need assistance after this call your installer. The thermostat should only be opened or removed by a qualified professional to prevent possible injury from electric shock and/or damage to the product.
0014_Section 4_dft10_v4.qxd:Section 2_dft9
WIRELESS PROGRAMMABLE THERMOSTAT
Wireless communication between thermostat and receiver box supplied pre-bound
Auto, manual, holiday and off (frost) modes
Memory holds user programme even when batteries are changed
Automatic summer/winter time change
Extra large LCD display with user friendly Line of Text
The CM920 series of Wireless Programmable Thermostats are designed to provide wireless time and temperature control to heating or cooling systems in domestic and light commercial buildings. The thermostat communicates heating demand by radio frequency (RF) signals to the receiver, which is located in the most convenient position for ease of wiring into the system. The slim, ultra modern design complements the large LCD screen with the Line of Text (LoT) display and one function button to ensure simplified programming and operation for all users. The CM920 series can be used to control the heating circuit in a Sundial S or Y Plan and is particularly well suited to control combination boiler installations or additional zones in a S Plan Plus system. The CM921 has been designed for applications where the householder has the same heating needs from day to day, whereas the CM927 has the capability to provide a different heating programme for each day of the week to maximise energy efficiency. Two wire, volt free connections are ideal for use with combination boilers.
Up to six time/temperature settings per day
Synchronised boiler control in multi-zone systems for optimum efficiency
Boiler ON display
Volt free connections
CMday programming with party and day off overrides
Honeywell Control Products and Systems, Issue 10
WIRELESS PROGRAMMABLE THERMOSTAT CM921/CM927
I Installation I Specification
: 24V~ 240V~ 50Hz, 10A resistive, 3A inductive : Single pole, double throw (SPDT) relay : Two AA size, 1.5V alkaline batteries : 230VAC, 50Hz (2.5mm2 cable max.) : Minimum 2 years : ISM (868.0-868.6) MHz, 1% duty cycle : 30m max, in a domestic environment : 5 to 35C (adjustable) in 0.5C steps : 0 to 50C : 5 to 16C in 0.5C steps : 0.5K at 20C (50% load, 3K/hr) : Time of day: 1 minute : Programme time changes: 10 minutes : 0 to 40C : 10 to 90% RH, non-condensing : 20 to 55C 0 to 90% RH, non condensing : 12 hr clock (with AM/PM indication) default but changeable to 24 hr : Boiler cycle rate 3, 6 (default), 9, 12/hr : Min. ON time 1(default) to 5 min, adjustable : Proportional bandwidth 1.5C, adjustable : Temperature offset 3 to +3C : IP30 : Complies with BS EN60730-1 (2000), BS EN55014-1(1997), EN55014-2 (1996), ETSI EN300 220-3 (2000), ETSI EN301 489-3 (2000) The R6660 Receiver Box should be Switch Rating installed in clear spaces. Leave at least 30cm distance from any metal Switch Type objects including pipes and at least 1m from any other electrical equipment Power Supply Thermostat e.g. radio, TV or computer etc. Do not Receiver mount on metal wall boxes. Battery Life RF Operation Band RF Communication Range Temperature Setting Range Temperature Display Range Frost Protection Temperature Control Accuracy Time Setting Resolution The CM921/927 thermostat must be located where it is not subjected to extraneous heat gains, direct sunlight Operating Temperature and Humidity Range or draughts. Storage Conditions Time Display Application Settings (See installation instructions)
I Ordering Specification
CMT921Aday Wireless Programmable Thermostat complete with pre-bound Receiver Box, batteries, fixing screws and instructions CMT927A1049 As above, with 7 day program
IP Rating Standards
I Dimensions (mm)
I Typical Wiring
Honeywell Control Products and Systems, Issue 10, 4.5
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