Honeywell CM927 User Manual
•
CM927
WIRELESS PROGRAMMABLE THERMOSTAT
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 combiboilers, 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 utilising 868 MHz band with 1 %
duty cycle limit to minimise 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
minimum 5°C (installer adjustable) so that pipes in the house
will never freeze in winter.
• Communication compatibility with other Honeywell product
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 table top 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
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CONTROLS/DISPLAY LAYOUT
Room Unit Layout:
1. Day & Date Display
2. Time Display
3. Dynamic Text Display
(DTD)
4. Burner On Indicator
5. Battery Low Indicator
6. Temperature Display
7. Temperature Change
Buttons
8. Information Enquiry
Button
9. Slider Switch
10. Green OK Button
11. Program Buttons
12. Battery Cover
13. Battery Compartment
14. Holiday Button
15. Party Button
16. Day Off Button
17. Copy Day Button
SPECIFICATIONS
CM927 CHRONOTHERM
ELECTRICAL
Room unit power
supply
Battery life : Minimum 2 years
Battery
replacement
Receiver power
supply
Switch type : SPDT potential free
Output rating : 24-230 V AC, 10 A resistive, 3 A inductive
Wiring (receiver
only)
Wire access : from the rear (wall box mounting), right and
: 2 x 1.5 V IEC LR6 (AA) Alkaline cells
: Program retained in EEPROM
: 230V AC +10% - 15%, 50Hz
0.6 p.f.
: Cable terminals for mains and relay wiring
for max 2.5 mm
2
wire
bottom
RF
RF operation band : ISM (868.0-868.6) MHz, 1% duty cycle
RF communication
: 30 m in a residential building environment
range
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
Shipping & storage
: 0 to 40
: 0 to 30
: -20 to 55
temperature
Humidity : Humidity range 10 to 90% rh, non-
IP class : 30
Meeting the
: EN60730-1(Nov 2000), EN55014-1(1997),
following
standards
o
C when relay load < 8 A
o
C when relay load > 8 A
o
C
condensing
EN55014-2(2000), ETSI EN300 220-3
(2000), ETSI EN301 489-3(2000)
TEMPERATURE CONTROL
Sensing element : 100K (@ 25
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
o
C ) NTC thermistor
TIME SETTING/PROGRAMMING
Time display : 24 hour or 12 hour AM/PM format
Time keeping
accuracy
Program : 7-day with 6 daily time and temperature
Time setting
resolution
Temperature
setting range
Room
Temperature
display range
: Typically better than 10 minutes per year
level changes
: Time of day - 1 minute
Program – 10 minute steps
o
: Program : 5 to 35
: 5
o
C to 16 oC). Frost protection does not
C in 0.5 oC steps Frost
o
C or equal to lower limit (5
work in cooling mode
: From 0
o
C to 50 oC
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EN0H 8556 UK07 R1 10/06
In Install
INSTALLER SET-UP
To enter the installer set-up mode:
a) Move the slider switch to the OFF position.
b) Press and hold the INFO
buttons ‘< >’ together.
c) The unit will display the first parameter of installer
parameter group category 1 (from n.1 to n.19).
d) Press the TEMP
setting. The display will flash indicating that a change has
been made.
e) Press the green OK button to confirm this change and the
display will stop flashing.
f) Press the
+ button to go to the next parameter.
g) Press the program button
Installer mode (from n.1 to n.14).
h) To exit the installer mode, move the slider switch to the
AUTO or MAN positions.
i button and the two program
or buttons to change the factory
> to go to category 2 in the
Abbreviated Set-Up Description
e.g. Cl = Clock Format
CM927 CHRONOTHERM
Factory Setting or New Choice
Press TEMP or to change
e.g. 12 = AM/PM Format
24 = 24hr Format
Installer Set-up Number
(Press + or - to change)
e.g. 1 = Clock Format
er 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?
Heating Gas Boilers
(<30KW)
Air
Oil Boiler 3 4 1. Set Minimum ON Time to 4 minutes.
Thermal Actuator 12 1 Set Cycle/Hour to 12.
Zone valve 6 1 No changes required.
conditioning
Heat Pump/
Air conditioner
Fan coil 6 1 No changes required.
Cycle/
Hour
Minimum
ON time
(in minutes)
Note : All parameters listed below belong to category 2 – System
Parameters (see Installer Parameters Table)
6 1 No changes required
2. Set Cycle/Hour to 3.
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
buttons together for 5 seconds.
as required.
3 4 1. Set Minimum ON Time to 4 minutes.
2. Set Cycle/Hour to 3.
Brief Description of the
Parameter Function.
or
Modify the cooling program
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