Honeywell Home CM927 Programmable Thermostat Product Specification Sheet
- October 30, 2023
- Honeywell Home
Table of Contents
Honeywell Home CM927 Programmable Thermostat
View all Honeywell thermostat manual
PRODUCT SPECIFICATION SHEET
The CM927 thermostat is designed to provide automatic time and temperature control of heating or cooling systems in villas and apartments. It can be used as part of a system in conjunction with combi boilers, oil-burners and gas fired boilers, circulation pumps, thermal actuators, zone values and electric heating systems (<10A). In combination with other CM927 room units and HC60NG receivers it can be used to control multi-zone applications (up to 4 zones). The radio frequency-controlled CM927 system pack consists of a room unit CMT927A and a relay box R6660D (HC60NG). No wiring to the room unit is required. The installer only needs to wire the relay box to the controlled device (e.g. boiler) and mount the room unit in a suitable location where RF communication is reliable. The CM927 uses reliable RF communication technology in the 868MHz band. The CM927 extra large LCD display, dynamic text display and controls layout are identical to the CM907 ‘wired’ thermostat. The unit is ideal for consumers who want reliable and precise temperature control from a modern looking, simple to program and easy-to-use product.
FEATURES
- CM927 can be installed without disrupting your room décor as no wiring connection is required between the room unit and the boiler
- Attractive, slim, ultra-modern styling makes it ideal for location in any type of home
- 7-day heating programming
- A dynamic text display on the LCD that gives enhanced feedback to the user/installer
- LCD Backlighting to illuminate the display for easier viewing in low light conditions
- Reliable RF communication utilizing 868 MHz band with 1 % duty cycle limit to minimize communication disturbance
- Every room unit can be bound with several relay boxes (e.g. to control several electric heating panels)
- Armchair programmed
- Party feature that temporarily maintains a selectable constant temperature for 1-23 hours, then returns to normal operation.
- Day Off button follows Sunday’s program for 1 to 99 days, allowing selection of a different heating program without having to re-program the thermostat.
- Holiday button that provides energy savings by reducing to a constant temperature for 1 to 99 days when people are on holiday, returning to normal operation (AUTO or MANUAL) on the day of their return.
- EEPROM memory holds the user program indefinitely
- OFF position has an integral frost protection setting at a minimum 5°C (installer adjustable) so that pipes in the house will never freeze in winter.
- Communication compatibility with other Honeywell products such as HR80, HM80 and HCE80.
- CM927 can be used to control a zoning system with up to 4 zones
- Maximum system efficiency and extended boiler life due to unique zoning system synchronisation
- Automatic Summer / Winter time change adjusts the time automatically to daylight saving time.
- Standard room units and receiver boxes are used for zoning applications algorithm
- When used with the tabletop stand the room unit can be positioned anywhere in the room where RF communication is reliable
- 24…230V 10A resistive, 3A inductive SPDT relay provides compatibility with most domestic central heating systems reducing the need to stock many different models.
- The HC60NG may be surface or wallbox mounted.
- Installer Set-Up Mode allows extra functions to be set at the discretion of the installer to match the consumer applications and needs:
- Optimisation
- Pump Exercise
- Upper / Lower Setpoint Limit Adjust
- Temperature offset
- Minimum ON time
- Cycle rate
- Heat / Cool Operation
- Proportional Band Width
- Fail-safe mode for communication loss
CONTROLS/DISPLAY LAYOUT
Room Unit Layout
- Day & Date Display
- Time Display
- Dynamic Text Display (DTD)
- Burner On Indicator
- Battery Low Indicator
- Temperature Display
- Temperature Change Buttons
- Information Enquiry Button
- Slider Switch
- Green OK Button
- Program Buttons
- Battery Cover
- Battery Compartment
- Holiday Button
- Party Button
- day Off Button
- Copy Day Button
SPECIFICATIONS
ELECTRICAL
- Room unit power supply : 2 x 1.5 V IEC LR6 (AA) Alkaline cells
- Battery life: Minimum 2 years
- Battery replacement: Program retained in EEPROM
- Receiver power supply : 230V AC +10% – 15%, 50Hz
- Switch type: SPDT potentially free
- Output rating: 24-230 V AC, 10 A resistive, 3 A inductive 0.6 p.f.
- Wiring (receiver only): Cable terminals for mains and relay wiring for max 2.5 mm2 wire
- Wire access: from the rear (wall box mounting), right and bottom
RF
- RF operation band: ISM (868.0-868.6) MHz, 1% duty cycle
- RF communication range: 30 m in a residential building environment
- RF communication technology: short, high-rate transmissions to minimise air time and avoid collisions
- Blocking immunity: Receiver class 2 (ETSI EN300 220-1 version 1.3.1)
- RF binding method: Factory pre-bound with the room unit.
ENVIRONMENTAL & STANDARDS
- Operating temperature : 0 to 40oC when relay load < 8 A : 0 to 30oC when relay load > 8 A
- Shipping & Storage temperature: -20 to 55oC
- Humidity: Humidity ranges 10 to 90% RH, non-condensing
- IP class: 30
- Meeting the following standards : EN60730-1(Nov 2000), EN55014-1(1997), EN55014-2(2000), ETSI EN300 220-3 (2000), ETSI EN301 489-3(2000)
TEMPERATURE CONTROL
- Sensing element: 100K (@ 25 oC ) NTC thermistor
- Control form: Fuzzy Logic Algorithm
- Minimum ON time 10% of cycle time (min one minute), adjustable to 2 to 5 min (see installer set up)
- Cycle rate: Selectable by application (see installer set up)
- Temperature control accuracy : +0.5 K (nominal) @ 20oC, 50% load 3K Δ/hour
- Fail-safe mode: Off or cycling depending on the CM927 system set-up
TIME SETTING/PROGRAMMING
- Time display : 24 hour or 12 hour AM/PM format
- Time keeping accuracy : Typically better than 10 minutes per year
- Program : 7-day with 6 daily time and temperature level changes
- Time setting resolution : Time of day – 1 minute
- Program – 10 minute steps
- Temperature setting range : Program : 5 to 35oC in 0.5 oC steps Frost: 5 oC or equal to the lower limit (5 oC to 16 oC). Frost protection does not work in cooling mode
- Room Temperature display range : From 0 oC to 50 oC
INSTALLER SET-UP
To enter the installer set-up mode
- Move the slider switch to the OFF position.
- Press and hold the INFO i button and the two program buttons ‘< >’ together.
- the unit will display the first parameter of the installer parameter group category 1 (from n.1 to n.19).
- Press the TEMP or buttons to change the factory setting. The display will flash indicating that a change has been made.
- Press the green OK button to confirm this change and the display will stop flashing.
- Press the + button to go to the next parameter.
- Press the program button > to go to category 2 in the Installer mode (from n.1 to n.14).
- To exit the installer mode, move the slider switch to the AUTO or MAN positions.
In the Installer set-up we can
- Set-up specific applications parameters
- Enable special features
- Configure system timing master for the zoning system
| Specific Applications | Setting | What do you need to change? |
|---|---|---|
| Cycle/ Hour | Minimum ON time(in minutes) | Note : All parameters listed |
below belong to category 2 – System Parameters (see Installer
Parameters Table )
Heating| Gas Boilers (<30KW)| 6| 1| No changes required
| Oil Boiler| 3| 4| 1. Set Minimum ON Time to 4 minutes.2. Set Cycle/Hour
to 3.
| Thermal Actuator| 12| 1| Set Cycle/Hour to 12.
| Zone valve| 6| 1| No changes required.
Air conditioning| | | | 1. Configure the thermostat to allow switching
between heating and cooling modes (set parameter n.4:HC to 1)2. Set the
thermostat accordingly to the required mode of operation (heating or cooling)
by pressing the TEMP or buttons together for 5 seconds. Modify the cooling
program
as required.
| Heat Pump/ Air conditioner| 3| 4| 1. Set Minimum ON Time to 4 minutes.2.
Set Cycle/Hour to 3.
| Fan coil| 6| 1| No changes required.
Special Features| Description| Setting
---|---|---
Optimisation (Variable Start Time)| The thermostat will adjust the start time
in the morning/afternoon so the desired temperature is reached by the start of
the program period. The system will restrict the start time to a max of 2
hours.| To enable: Set parameter 8:OP (category 1) to 1.|
Heating or Cooling Operation| This product can be used for heating or cooling
applications. If you select cooling mode the control algorithm and factory
default program will be modified. You can independently modify the heating and
cooling profile.| To enable: Set parameter 4:HC (category 2) to 1.|
Summer/Winter Auto time change| This feature moves time automatically on the
last Sunday of March and the last Sunday of October. The feature is factory
enabled.| To enable: Set parameter 3:tC (category 1) to 1.|
Temperature Offset| If the thermostat is located in a particularly hot/cold
location for reliable signal transmission reasons then the measured/displayed
temperature can be adjusted by +/- 3°C. This is useful if the homeowner wants
the reading to match another appliance temperature display.| Set parameter
12:tO (category 1) to the requiredoffset value.|
Upper/Lower Temperature Limit| The normal upper temperature limit of 35°C can
be reduced to 21°C to save the homeowner energy. The normal lower limit of 5°C
can be increased up to 21°C to protect inhabitants from cold.| Set parameter
6:uL (category 1) to the desired upper limit.Set parameter 7:LL (category 1)
to the desired lower limit.
|
INSTALLER PARAMETER TABLES
Parameter| Installer Set- Up Number / Abbreviation (Press + or – keys
to select)| Factory Setting| Optional Setting
---|---|---|---
Category 1 Parameters – Room Thermostat Settings
| | Display| Description| Display| Description
AM-PM / 24hr Display| 1:Cl| 24| 24 hr clock display| 12| 12 hr AM / PM clock
display
RESET Time / Temperature Program| 2:rP| 1| Time / Temperature profile set to
factory defaultChanges to 0 when one of the time/temp profiles are changed| 0
1
| Time / Temperature are as programmed To restore the factory profile set to 1
Automatic Summer/Winter Time Change| 3:tC| 1| Automatic Summer/Winter Time
Change Enabled| 0| Automatic Summer/Winter Time Change Disabled
LCD Backlighting| 5:bL| 1| Backlighting Enabled| 0| Backlighting Disabled
Upper Temperature Limit| 6:uL| 35| 35°C Upper Temp. Limit| 21 to 34| 21°C to
34°C adjustment in 1°C steps
Lower Temperature Limit| 7:LL| 5| 5°C Lower Temp. Limit| 6 to 21| 6°C to 21°C
adjustment in 1°C steps
Optimisation| 8:0P| 0| Optimisation disabled| 1| Optimisation enabled
Temperature Offset| 12:tO| 0| No offset| -3 to +3| -3°C to +3°C adjustment in
0.1°C steps
Proportional Band Width| 13:Pb| 1.5| 1.5°C Proportional Band| 1.6 to 3.0|
1.6°C to 3.0°C adjustment in 0.1°C steps
Reset Parameters to Factory Defaults| 19:FS| 1| All settings held are the
factory defaults.Changes to 0 when one of the parameter values are changed| 0
1
| Settings are as modified above
To restore the factory profile set to 1
Parameter| Installer Set- Up Number / Abbreviation (Press + or – keys
to select)| Factory Setting| Optional Setting
---|---|---|---
Category 2 Parameters – System Settings (press the > button to access
this category)
| | Display| Description| Display| Description
Minimum boiler ON Time| 1:Ot| 1| 1 minute minimum ON time| 2 to 5| Selection
of 2,3,4 or 5 minutes minimum ON time
Cycle Rate| 2:Cr| 6| 6 cycles per hour (cph)| 3, 9 or12| Selection of 3,9 or
12 cph
Heat / Cool Change| 4:HC| 0| Disabled| 1| Enabled
Pump Exercise| 5:PE| 0| Pump Exercise Disabled| 1| Pump Exercise Enabled
System Synchronisation| 6:Sn| 0| Standard operation of the Room Unit| 1| Room
unit configured as Synchroniser
Loss of Communication Instruction| 7:LC| 0| Relay Off| 1| Relay 20% on / 80%
off
The following parameters are for the control of other Honeywell Wireless
products such as Wireless Underfloor Heating controls and Wireless Radiator
controls. For more information please contact Honeywell sales.
Room Temperature Sensor Use| 8:Su| 0| HC60 Control| 1,2,3 or 4| 1 – HR80/HM80
control with own/remote sensor (no temperature displayed)
2 – Hr80/HM80/HCE80 control with CM Sensor
3 – HC60 control and HR80/HM80/ HCE80 control with own/remote sensor
4 – Hr80/HM80/HCE80 control with own/ remote sensor (temperature displayed)
HR80 Window-Open Function| 9:HO| 0| Disabled| 1| Enabled
HR80 Local Override| 10:HL| 1| Enabled| 0| Disabled
Maximum Flow Setpoint| 11:uF| 55| 55°C Maximum Flow Temp.| 0 to 99| 0°C to
99°C adjustments in 1°C steps
Minimum Flow Setpoint| 12:LF| 15| 15°C Minimum Flow Temp.| 0 to 50| 0°C to
50°C adjustments in 1°C steps
Mixing Value Run Time| 13:Ar| 150| 150 seconds| 0 to 240| 0 to 240 sec.
adjustments in 1sec steps
Pump Overrun Run| 14:Pr| 15| 15 minutes| 0 to 99| 0 to 99 mins adjustments in
1min steps
DIMENSIONS
INSTALLATION
- The CM927 is a radio frequency device and for the best performance should be installed in an open space.
- Leave at least 30cm distance from any metal objects including wall boxes and at least 1 meter from any other electrical equipment e.g. radio, TV, PC etc.
- Do not mount onto metal wall boxes.
- NOTE: It is recommended that the R6660D relay box is installed before commencing with the room unit installation (refer to the Installation Guide).
WIRING
The R6660D relay box is designed for fixed wiring only and must be installed
in accordance with latest l.E.E. regulations.
Ensure the wiring connection to the supply is via a fuse rated at no more than
10 amps and a Class “A” switch (having contact separation of at least 3 mm in
all poles).
IMPORTANT
- The installer must be a trained service engineer
- Disconnect the power supply before beginning the installation
ORDERING SPECIFICATION
Description| Model| Logo| Literature| Availability|
Spec Sheet
---|---|---|---|---|---
7-day RF system pack (includes HC60)| CMT927A1015| Honeywell| French &
Dutch.| Sep 06| ENOH8556
7-day RF system pack (includes HC60)| CMT927A1023| Honeywell| French|
Oct 06| ENOH8556
7-day RF system pack (includes HC60)| CMT927A1031| Honeywell| Spanish|
Feb 07| ENOH8556
7-day RF system pack (includes HC60)| CMT927A1049| Honeywell| English
(UK)| Oct 06| ENOH8556
7-day RF system pack (includes HC60)| CMT927A1056| Honeywell| Italian.|
Sep 06| ENOH8556
7-day RF system pack (includes HC60)| CMT927A1064| Honeywell| HUN / GER|
Mar 07| ENOH8556
7-day RF system pack (includes HC60)| CMT927A1072| Honeywell| CZ / SK /
POL| Mar 07| ENOH8556
7-day room unit spare| CMS927B1015| Honeywell| French & Dutch.| Sep
06| ENOH8556
7-day room unit spare| CMS927B1023| Honeywell| French| Oct 06|
ENOH8556
7-day room unit spare| CMS927B1031| Honeywell| Spanish| Feb 07|
ENOH8556
7-day room unit spare| CMS927B1049| Honeywell| English (UK)| Oct
06| ENOH8556
7-day room unit spare| CMS927B1056| Honeywell| Italian.| Sep 06|
ENOH8556
7-day room unit spare| CMS927B1064| Honeywell| HUN / GER| Feb 07|
ENOH8556
7-day room unit spare| CMS927B1072| Honeywell| CZ / SK / POL.| Mar
07| ENOH8556
HC60 Spare| R6660D1017| Honeywell| French & Dutch.| Sep 06|
ENOH8556
HC60 Spare| R6660D1025| Honeywell| French| Sep 06| ENOH8556
HC60 Spare| R6660D1033| Honeywell| Spanish| Sep 06| ENOH8556
HC60 Spare| R6660D1041| Honeywell| English (UK)| Sep 06| ENOH8556
HC60 Spare| R6660D1058| Honeywell| Italian.| Sep 06| ENOH8556
HC60 Spare| R6660D1009| Honeywell| Eng / Ger| Sep 06| ENOH8556
Honeywell Control Systems Limited
http://europe.hbc.honeywell.com
Newhouse Industrial Estate Motherwell ML1 5SB United Kingdom