Honeywell CM901 PRODUCT SPECIFICATION SHEET

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CM901

PROGRAMMABLE THERMOSTAT

PRODUCT SPECIFICATION SHEET

The CM901 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 valves and electric heat systems (<8A).

The CM901 is designed with the installer in mind and includes a moulded back-plate with trunking guides and wiring breakouts to make installation quick and easy.

The CM901 extra large LCD display, dynamic text display, button layout based on the same simple programming philosophy used on our acclaimed CM60 products and the introduction of an ‘OK’ button makes it easier to install and more user friendly.

The unit is ideal for consumers who want reliable precise temperature control from a modern looking, simple to

FEATURES

Attractive, slim, ultra-modern styling makes it ideal for

•

location in any type of home.

• 24 hour heating program.

• A dynamic text display on the LCD that gives enhanced

feedback to the user / installer.

• Up to 6 daily independent time and temperature level

changes let you set 6 time and temperatures pairs to suit your lifestyle.

• LCD Backlighting to illuminate the display for easier viewing

in low light conditions.

• Temporary programmed temperature override to override

the programmed temperature till the next switch point.

• Holiday button that provides energy savings by reducing

to a constant temperature from 1 to 99 days when people are on holiday, returning to normal operation (AUTO or MANUAL) on the day of their return.

• Room Temperature Enquiry.

• 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.

• 24...230V 8A resistive, 3A inductive SPDT relay provides

compatibility with most domestic central heating systems reducing the need to stock many different models.

• Battery powered by 2 x AA size (LR6) alkaline cells.

• Minimum battery life of 2 years with low battery warning

indicator.

• Built-in default heating program.

• Automatic Summer / Winter time change adjusts the time

automatically to daylight saving time.

• Telephone interface can be fitted to allow remote switching

between program modes and a fixed set-point.

• Surface or wall-box mounting options with trunking guides

and wiring breakouts to simplify installation.

• No installer links or special installer switches on the back of

the unit mean no adjustment is required for combi-boilers and most domestic central heating systems.

• User Set-Up Mode allows extra functions to be set at the

discretion of the user:

• AM-PM or 24hr time display.

• Resetting the heating profile to factory default.

• Enable / disable of Auto Summer / Winter time change.

• Languages selection of the user interface (on selected

models only).

• Installer Set-Up Mode allows extra functions to be set at the

discretion of the installer to match the consumers applications and needs:

• Optimisation.

• Pump Exercise.

• Upper / Lower Set point Limit Adjust.

• Temperature offset.

• Minimum ON time.

• Cycle rate.

• Heat / Cool Operation.

• Proportional Band Width.

• Diagnostic Mode to assist in faultfinding.

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CONTROLS/DISPLAY LAYOUT

CM901 CHRONOTHERM

PRODUCT 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. Time Change Buttons

SPECIFICATIONS

Batteries : 2 x 1.5 V IEC LR6 (AA) Alkaline cells

Battery life : Minimum 2 years

Battery replacement

Switch type : SPDT (potential free)

Electrical rating : 230 V~, 50...60 Hz, 0.5 A to 8 A resistive

Time display : 24 hour or 12 hour AM/PM format

Time keeping accuracy

Program : 6 daily time and temperature level

Time setting resolution

Sensing element : 100K (@ 25 oC ) NTC thermistor

Temperature setting range

: Program retained in EEPROM

0.5 A to 3 A inductive (0.6 pf) 24 V~, 50...60 Hz, 0.5 A to 8 A resistive

0.5 A to 3 A inductive (0.6 pf)

: Typically better than 10 minutes per year

changes

: Time of day - 1 minute

Program - 10 minute steps

: Program : 5 to 35oC in 0.5 oC steps Frost : 5

C to 21 oC). Frost protection does not

C or equal to lower limit

work in cooling mode.

Temperature control accuracy

Room

: ±0.5 K (nominal) @ 20oC, 50% load

3 K Δ/hour

: From 0

C to 50 oC Temperature display range

Control form : P + I (Proportional + Integral)

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)

Wiring : Terminal block capable of accepting

wires up to 2.5 mm

Wire access : Mains wiring – rear right.

Low voltage wiring – rear right.

Dimensions : 133 x 89 x 26 mm (w x h x d)

133 x 175 x 26 mm (w x h x d) (flap open)

Environmental : Operating temperature range 0 to 40oC

Shipping and storage temperature range

-20 to 55

Humidity range 10 to 90% rh, non-

condensing

Approvals : Designed to meet European EN

approvals EN60730-1(Nov 2000), EN55014-1 (1997), EN55014-2 (2000)

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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 i button and the two program

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

+ to go to the next parameter.

g) Press the program button > to go to category 2 in the

Installer mode (from n.1 to n.5).

h) To exit the installer mode, move the slider switch to the

AUTO or MAN positions.

or buttons to change the factory

Abbreviated Set-Up Description

e.g. Cl = Clock Format

Installer Set-up Number

(Press + or - to change)

e.g. 1 = Clock Format

CM901 CHRONOTHERM

Factory Setting or New Choice

Press TEMP or to change

e.g. 12 = AM/PM Format

24 = 24hr Format

In Installer set-up we can:

❑ Set-up specific applications

❑ Enable special features

❑ Establish support for optional accessories

Specific Applications Setting What do you need to change?

Heating Gas Boilers

(<30KW)

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 action required.

Electric heating (for applications <8A)

Air conditioning

Heat Pump/ Air conditioner

Fan coil 6 1 No action required.

Cycle/ Hour

Minimum ON time

(in minutes)

6 1 No action required

12 1 1. Configure the thermostat for electric heating (set parameter n.3,

3 4 1. Set Minimum ON Time to 4 minutes.

Note : a. To change Cycle/Hour, please go to parameter n. 2, category 2

in the installer set-up mode.

b. To change Minimum ON Time, please go to parameter n. 1,

category 2 in the installer set-up mode.

2. Set Cycle/Hour to 3.

category 2 in the installer set up mode to 1).

2. Set Cycle/Hour to 12.

1. Configure the thermostat to allow switching between heating and cooling modes (set parameter n.4, category 2 in the installer set-up mode 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.

2. Set Cycle/Hour to 3.

Brief Description of the Parameter Function.

Modify the cooling program

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CM901 CHRONOTHERM

Special Features Description What to do if we wish this

feature

Optimisation (Variable Start Time)

Adaptive Intelligence recovery TM

The thermostat will adjust the start time in the morning/afternoon so the desired temperature is reached by the start of the program period e.g. Time 7:00, Temp 21

C. The thermostat will monitor the accuracy of the start up and use this information to modify the calculation for the following day by changing the ramp rate (initial 3 K/hr) .The system will restrict the start time to a max of 2 hours. Note: Optimisation will not work in cooling mode.

Set parameter n.8, category 1 in the installer set-up mode to 1.

AM-PM/ 24hr Display Change display format (default 24hr). Set parameter n.1, category 1 in the

installer set -up mode to 12.

Pump exercise When enabled the Pump Exercise will switch the relay

on for 1 minute at 12:00 if the relay has not been

Set parameter n.5, category 2 in the installer set -up mode to 1.

switched on since 12:00 the previous day. While in Holiday mode the Pump Exercise feature, if

enabled, will operate.

Upper Temperature Limit The normal upper temperature limit of 35 oC can be

reduced down to 21

C to save the homeowner energy.

Useful if the homeowner rents to tenants.

Lower Temperature Limit The normal lower temperature limit of 5 oC can be

increased up to 21

C to protect the inhabitants from

cold. Useful if the inhabitants include the elderly,

Set parameter n.6, category 1 in the installer set -up mode to the desired limit.

Set parameter n.7, category 1 in the installer set -up mode to the desired limit.

children or disabled.

Temperature Offset If the thermostat is located in a hot/cold location and

cannot be moved because of wiring then the measured/ displayed temperature can be adjusted by +/- 3

Set parameter n.12, category 1 in the installer set -up mode to the desired

offset value. Useful if the homeowner wants the reading to match another appliance temperature display.

Proportional Band Width Can be adjusted up to 3 oC (default is 1.5 oC) to provide

better temperature control (less overshoot). Useful for:

Set parameter n.13, category 1 in the

installer set -up mode to the desired

value.

a. Well insulated homes with over-sized heating

systems.

b. Air systems with fast response.

Optional Accessories

Outside Temperature Sensor (F42010971 001)

Description What to do if we wish this

feature

An Outside Temperature Sensor can be fitted, allowing the homeowner to display the outside temperate on the thermostat display by pressing the INFO

i button. The

thermostat will read the outside temperature every 10 minutes. Outside temperature display range is from -30

C to +45 oC. The sensor can be connected up to 50

1. Fit the sensor (instructions included in the sensor package).

2. Set parameter n. 10, category 1 in the installer set-up mode to 1.

meters from the unit.

Remote Temperature Sensor (F42010972 001)

A Remote Temperature Sensor can be fitted, allowing the thermostat to control the temperature from another room or space where it is inconvenient to locate the thermostat. It will read the remote sensor every 1 minute. The sensor can be connected up to 50 meters

1. Fit the sensor (instructions

included in the sensor package).

2. Set parameter n. 10, category 1 in

the installer set-up mode to 2.

from the unit. Useful for commercial premises where the public may tamper with the product.

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CM901 CHRONOTHERM

Parameter Installer Set-

Up Number / Abbreviation (Press + or – keys to select)

Display Description Display/Setting Description

Category 1: Thermostat Parameters

Factory Setting

Optional Setting

Installer SetUp Category

(Press PROG keys ‘< or >’ to select)

AM-PM / 24hr

1:Cl 24 24 hr clock display 12 12 hr AM / PM clock display 1

Display

RESET Time / Temperature Program

2:rP 1 Time / Temperature

profile set to factory default Changes to 0 when

Time / Temperature are as programmed To restore the factory

profile set to 1 one of the time/temp profiles are changed

Automatic Summer/Winter Time Change

3:tC 1 Automatic

Summer/Winter Time Change Enabled

Backlight Display 5:bL 1 Backlight Display

Enabled

Upper Temperature Limit

Lower Temperature Limit

6:uL 35 35°C Upper Temp.

Limit

7:LL 5 5°C Lower Temp.

Limit

0 Automatic

Summer/Winter Time

Change Disabled

0 Backlight Display

Disabled

21 to 34 21°C to 34°C

adjustment in 1°C steps

6 to 21 6°C to 21°C adjustment

in 1°C steps

Optimisation 8:0P 0 Optimisation disabled 1 Optimisation enabled 1

Remote Control

9:tS 0 Disabled 1 Enabled 1 Setpoint (e.g. via telephone module)

Second Temperature Sensor

10:SS 0 No sensor fitted 1, 2 1 - Outside Temperature

Sensor fitted 2 - Remote Temp. Sensor fitted

Temperature Offset

Proportional Band Width

12:tO 0 No offset -3 to +3 -3°C to +3°C adjustment

in 0.1°C steps

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

Settings are as modified above

To restore the factory profile set to 1

values are changed

‘Category 2: System Parameters (You must press the ‘>’ program key to enter this section)

Minimum boiler ON Time

1:Ot 1 1 minute minimum ON

time

2 to 5 2 - 2 minutes

3 - 3 minutes

4 - 4 minutes 5 - 5 minutes

Cycle Rate 2:Cr 6 6 cycles per hour

(cph) for gas boilers, zone valves and fan-

3, 9, 12 3 - 3 cph

9 - 9cph 12 - 12 cph

coil

Electric Heat

3:Eh 0 Applications < 3A 1 Applications 3 - 5A 2

Heat / Cool

4:HC 0 Disabled 1 Enabled 2

Change

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DIMENSIONS

INSTALLATION

CM901 CHRONOTHERM

LOCATION

The CM901 thermostat is the control element of the heating / cooling system and, therefore, MUST be located in a position with good air circulation, at average room temperature and on an inside wall 1.5 metres above the floor level. Do not position the CM901 thermostat near sources of heat (radiators, hot air vents, TV or lights), near doors or windows, or in direct sunlight.

MOUNTING

The CM901 thermostat can be mounted directly on the wall surface or on an electrical wall-box.

WIRING

The CM901 thermostat is designed for fixed wiring only and must be installed in accordance with the latest l.E.E. regulations. Ensure the wiring connection to the supply is via a fuse rated at no more than 8 amps and a Class "A" switch (having contact separation of at least 3 mm in all poles).

IMPORTANT

1. The installer must be a trained service engineer

2. Disconnect the power supply before beginning installation

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WIRING

CM901 CHRONOTHERM

ORDERING SPECIFICATION

Description Model Logo Literature Availability Spec Sheet

1-day programmable thermostat

Description Model Logo Literature Availability Spec Sheet

CM900 Remote Temp Sensor

CM900 Outdoor Temp Sensor

CM900 Telephone Interface

Terminal Block

Honeywell Control Systems Limited http://europe.hbc.honeywell.com Newhouse Industrial Estate Motherwell ML1 5SB United Kingdom

CMT901A1044

CMT901A1028

CMT901A1010

CM901i

CMT901A1036

F42010972 001

F42010971 001

F42010977 001

Honeywell

N/A

English (UK).

French.

French & Dutch.

Italian.

Spanish.

Multi-lingual

Dec 05

Jan 06

Sep 06

EN0H 8546 UK07 R3 09/06

ENOH8546

ENOH8554

ENOH8553

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