Honeywell CM702 Instructions d'installation

EN0H 8545 UK07 R1 09/06

CM702

PROGRAMMABLE THERMOSTAT

PRODUCT SPECIFICATION SHEET

The CM702 thermostat is designed to provide automatic time

and temperature control of heating 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 valves and electric heat systems

(<5A).

The CM702 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 CM702 large LCD display, button layout based on the

same simple programming philosophy used on our acclaimed

CM20 products and the introduction of an ‘OK’ button makes

it easier to install and more user friendly.

The CM702 features a unique programming function that

allows the user to select an alternative time & temperature

profile whenever their lifestyle requirements change (e.g.

weekend, bank holiday). The unit is ideal for consumers who

want reliable precise temperature control from a modern

looking, simple to program and easy to use product.

FEATURES

•Attractive slim, modern styling makes it ideal for

location in any type of home.

•24-hour heating program.

•Up to 4 daily independent time and temperature level

changes let you set 4 time and temperatures pairs to

suit your lifestyle.

•Temporary programmed temperature override to

temporarily override the programmed temperature till

the next switch point.

•1/2 Program button allows switching to an alternative

heating program whenever it’s required with just one

button press. This alternative program can be

adjusted in exactly the same way as the normal

heating program.

•Room Temperature Enquiry.

•EEPROM memory holds the user program

indefinitely.

•OFF mode 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 5A resistive, 2A 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.

•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.

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

at the discretion of the installer to match the

consumers applications and needs:

•Pump Exercise.

•Upper / Lower Set point Limit Adjust.

•Temperature offset.

•Minimum ON time.

•Cycle rate.

•Proportional Band Width.

•Diagnostic Mode to assist in fault finding.

CM702 CHRONOTHERM

2 EN0H 8545 UK07 R1 09/06

SPECIFICATION

CONTROLS / DISPLAY LAYOUT

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

Battery life :Minimum 2 years

Battery

replacement

:Program retained in EEPROM

Switch type :SPDT (potential free)

Electrical rating :230 V~, 50...60 Hz, 0.1 A to 5 A resistive

0.1 A to 2 A inductive (0.6 pf)

24 V~, 50...60 Hz, 0.5 A to 5 A resistive

0.5 A to 2 A inductive (0.6 pf)

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

Time keeping

accuracy

:Typically better than 10 minutes per year

Program :2 independent sets of 4 daily time and

temperature level changes that can be

switched between as desired.

Time setting

resolution

:Time of day - 1 minute

Program - 10 minute steps

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

Temperature

setting range

:Program : 5 to 35oC in 0.5 oC steps

Frost : 5 oC or equal to lower limit

(5 oC to 21 oC).

Temperature

control accuracy

:±0.5 K (nominal) @ 20oC, 50% load

3 K Δ/hour

Room

Temperature

display range

:From 0 oC to 50 oC

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 mm2

Wire access :Mains wiring – rear right.

Low voltage wiring – rear right.

Dimensions :133 x 88.5 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 55oC

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)

PRODUCT LAYOUT:

1. LCD Screen

2. Battery Low Indicator

3. Time Display

4. Burner On Indicator

5. Temperature Display

6. Temperature Change Buttons

7. Information Enquiry Button

8. Operating Mode Buttons

9. Green OK Button

10. Battery Compartment

11. Battery Cover

12. 1 / 2 Program Button

13. Program Buttons

14. Time Change Buttons

CM702 CHRONOTHERM

3 EN0H 8545 UK07 R1 09/06

INSTALLER SET-UP

Specific Applications Setting What do you need to change?

Cycle/

Hour

Minimum

ON time

(in 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.

Heating Gas Boilers

(<30KW)

6 1 No action 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 action required.

Electric heating

(for applications

<5A

)

12 1

1. Set Cycle/Hour to 12.

In Installer set-up we can:

❑Set-up specific applications

❑Enable special features

To enter the installer set-up mode:

a) Press the OFF button.

b) Press and hold the INFO ibutton 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 or buttons to change the factory

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 >to go to category 2 in the

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

h) To exit the installer mode, press the AUTO, MAN or OFF

buttons.

Abbreviated Set-Up Description

e.g. Cl = Clock Format

Installer Set-up Number

(Press + or - to change)

e.g. 1= Clock Format

Factory Setting or New Choice

Press TEMP or to change

e.g. 12 = AM/PM Format

24 = 24hr Format

CM702 CHRONOTHERM

EN0H 8545 UK07 R1 09/064

Special Features Description What to do if we wish this

feature

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

switched on since 12:00 the previous day.

While in Holiday mode the Pump Exercise feature, if

enabled, will operate.

Set parameter n.5, category 2 in the

installer set -up mode to 1.

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

reduced down to 21 oC to save the homeowner energy.

Useful if the homeowner rents to tenants.

Set parameter n.6, category 1 in the

installer set -up mode to the desired

limit.

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

increased up to 21 oC to protect the inhabitants from

cold. Useful if the inhabitants include the elderly,

children or disabled.

Set parameter n.7, category 1 in the

installer set -up mode to the desired

limit.

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 oC.

Useful if the homeowner wants the reading to match

another appliance temperature display.

Set parameter n.12, category 1 in the

installer set -up mode to the desired

offset value.

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

better temperature control (less overshoot).

Useful for:

a. Well insulated homes with over-sized heating

systems.

b. Air systems with fast response.

Set parameter n.13, category 1 in the

installer set -up mode to the desired

value.

CM702 CHRONOTHERM

EN0H 8545 UK07 R1 09/065

Parameter Installer Set-Up

Number /

Abbreviation

(Press + or -

keys to select)

Factory Setting

Optional Setting

Installer Set-

Up Category

(Press PROG

keys ‘< or >’ to

select)

Display Description Display/Setting Description

Category 1: Thermostat Parameters

AM-PM / 24hr

Display

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

RESET Time /

Temperature

Program

2:rP 1 Time /

Temperature

profile set to

factory default

Changes to 0

when one of the

time/temp profiles

are changed

Time / Temperature are as

programmed

To restore the factory

profile set to 1

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

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

Settings are as modified

above

To restore the factory

profile set to 1

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

Minimum 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-coil

3, 9, 12 3 - 3 cph

9 - 9cph

12 - 12 cph

Pump Exercise

:PE

Pump Exercise

Pump Exercise Enabled

CM702 CHRONOTHERM

EN0H 8545 UK07 R1 09/066

DIMENSIONS

LOCATION

The CM702 thermostat is the control element of the heating

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 CM702 thermostat near sources of heat (radiators, hot air

vents, TV or lights), near doors or windows, or in direct

sunlight.

MOUNTING

The CM702 thermostat can be mounted directly on the wall

surface or on to an electrical wall box.

WIRING

The CM702 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 5 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

INSTALLATION

CM702 CHRONOTHERM

Honeywell Control Systems Limited http://europe.hbc.honeywell.com

Newhouse Industrial Estate

Motherwell ML1 5SB

United Kingdom

EN0H 8545 UK07 R1 09/06

WIRING

Description Model Logo Literature Availability Spec Sheet

1+1 day programmable thermostat

with 6 switch points (instead of 4).

CMT702A1004

CMT702A1012

Honeywell

French, Dutch, Italian,

Spanish, German,

Portuguese.

French, Dutch, Italian,

Spanish, German,

Portuguese.

Sep 05

Oct 06

ENOH8545

ORDERING SPECIFICATION

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