Vemer Crono.X, VE081600 User Manual

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English

ELECTRONIC

PROGRAMMABLE

THERMOSTAT

Crono.X

User Manual

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User Manual - CRONO.X programmable thermostat

English

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User Manual - CRONO.X programmable thermostat

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Table of contents

Safety instructions pag. 34 Technical speciﬁ cations pag. 36 Installation and assembly pag. 37 Dimensions pag. 38 Device description pag. 39

- Functions of keys pag. 39

- Display pag. 40

Initial startup – total reset pag. 40 Adjustment of time and date pag. 41 Automatic operation pag. 42

- Program selection pag. 42

- Program customizing pag. 43

- Winter temperature proﬁ les pag. 45

- Summer temperature proﬁ les pag. 46

Manual operation pag. 47

- Manual operation selection pag. 47

- Setting the manual temperature pag. 47

Device off mode pag. 48 Winter-heating/summer-air conditioning modes pag. 48 Timer-controlled operation pag. 49

- Timer-controlled off type pag. 49

- Timer-controlled manual type pag. 49

- Timer-controlled automatic type pag. 49

Control by telephone dialler pag. 50

- Conﬁ guration for X.CODE BUS pag. 51

- Conﬁ guration for X.CODE Wave and general-purpose phone dialer pag. 51

Other available functions

- Settings guard (password) pag. 52

- Automatic solar/daylight saving time switching pag. 52

- Maximum and minimum daily temperature pag. 54

- Low battery level indicator pag. 54

Advanced programming pag. 55

- On/off or proportional temperature-control method pag. 56

- Aantifreeze temperature pag. 58

- Unit of measurementage pag. 58

- External sensor pag. 59

- Control sensor pag. 59

- Enabling RS485 output (bus) pag. 59

- Memory address pag. 59

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- Settings guard password pag. 59

- Total operating hour count pag. 60

- Battery charge status pag. 60

- Display brightness adjustment pag. 60

Battery replacement pag. 60 Error messages pag. 61 Connection pag. 61 Harmonized reference standards pag. 62

SAFETY INSTRUCTIONS

The CRONO.X thermostat performs 1B-type actions and is aimed for household or similar premises, under a normal pollution degree.

During product installation and operation, it is necessary to observe the

following instructions:

1) The instrument must be installed by a qualiﬁ ed person

2) Disconnect power supply while installing the unit

3) Do not power or connect the product if any part of it is damaged

4) Connect the product considering the diagrams described in the following manual and on the instrument

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User Manual

ELECTRONIC PROGRAMMABLE THERMOSTAT CRONO.X

Read all the instructions carefully

CRONO.X is a weekly programmable thermostat that unites ease of use with

some innovational functions not featured by traditional household temperature controllers.

More speciﬁ cally, this device is singled out by 6 features:

1) It displays or controls the temperature in a room situated at a maximum

distance of 40m by the use of an optional sensor (mod. X.Temp cod. VN883500)

2) A settings guard function is available in order to avoid unauthorized tampering

when the device is used in public premises.

3) The system’s on-off status can be remote-switched by landline or cellular

GSM phone. This is especially useful when the house is not used permanently or it is a holiday home. To implement this function it is necessary to install a device that receives calls or SMSs and interfaces with the programmable thermostat (phone dialer mod. VN782900 X.Code Wave for landline phone, VE072500 X.Code Bus for GSM network)

4) Daylight saving time/solar time switching can be automatically enabled

or disabled

5) The cut-in differential can be adjusted from 0,1°C to 1,0°C

6) Temperature control can be set to ON/OFF mode or Proportional mode with

selectable band and periods, the latter being especially appropriate in very large rooms with a strong thermal drift (sheds, systems including

fan-coils, aluminum or cast-iron radiators, etc.)

Also, when in manual mode, CRONO.X works as an ordinary thermostat.

Conversely, when in automatic mode: one of the three user-deﬁ ned temperature levels can be chosen for each hour segment of the day. CRONO.X controls both heating and air-conditioning systems.

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TECHNICAL SPECIFICATIONS

Code Model Description Power supply VE081600

CRONO.X electronic programmable thermostat 2x1,5V (AA) batteries

• 4 available operation modes: Automatic, Manual, timer-controlled, off

• when in automatic mode, 7 temperature proﬁ les can be selected and changed by the user

• when in automatic mode, the user can assign one of three temperature levels (T1, T2, T3) to each hour segment

• The device is suitable for the control of heating and air-conditioning systems

• Automatic solar/daylight saving time switching (can be disabled)

• Settings guard function for use in public premises (tampering protection)

• Optional external sensor (X.TEMP code VN883500) for temperature control or reading (max 40 m; -40°C ÷ +60°C)

• Remote control using a dedicated phone dialer by Vemer (X.CODE WAVE and X.CODE BUS) or by general-purpose phone dialer with a potential-free output contact

• Maximum and minimum daily temperature reading

• Antifreeze temperature to be selected from 1°C to 10°C (can be disabled)

• Power supply: 2 alkaline batteries 1,5V (AA-size)

• Battery autonomy: approximately 2 years (for alkaline batteries 2500mAh at 23°C)

• Standby charge for battery replacement: approximately 1 minute

• Output: bistable relay with changeover contact

8A/250Vca (resistive load) 2000VA (resistive load)

• Termination:

- relay output: 3-pole terminal strip, max. section of cables 1.5 mm²

- external sensor input and telephone dialer: 4-pole terminal strip, max. section

of cables 1.5 mm²

• Installation:

- on wall

- to cover a 503 box

• Temperature-control range:

- HEATING mode Automatic/Manual operation: +2°C ÷ +35°C

- AIR-CONDITIONING mode Automatic/Manual operation: +10°C ÷ +35°C

• ON/OFF control cut-in differential: adjustable from 0,1°C to 1,0°C

• Proportional control with adjustable band and period

• Accuracy: ±0.5°C

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• Operating conditions:

- temperature 0°C ÷ +50°C

- relative humidity 20% ÷ 90%, non-condensing

• Storage temperature: -10°C ÷ +65°C

• Protection rating: IPXXD

• Insulation class: II

INSTALLATION AND ASSEMBLY

It is advisable to install the programmable thermostat in a zone in which the

temperature is the closest to the room average value.

Do not install it too near doors, windows, sources of heat, direct sunlight

or in places in which there is too much or too little air ﬂ ow.

Installing the programmable thermostat about 150 cm from the ﬂ oor is

recommended.

Mounting can be on a wall or on a 503 box.

PLACEMENT REMOVAL

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FRONT FLAP OPENING

DIMENSIONS (mm)

123.0

93.5

33.5

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DEVICE DESCRIPTION

FRONT VIEW

369121518

.. .. .. .. .. .. .. ..

Lu Ma Me Gi Ve Sa Do

FUNCTIONS OF KEYS

Value up

Value down

Manual operation

WINTER-HEATING mode

SUMMER-AIR CONDITIONING mode (only accessible using a sharp tool)

Reset (only accessible using a sharp tool)

To set T0 for Automatic operation To set T1 for Automatic operation To set T2 for Automatic operation System off Timer-controlled operation Hourly programming for automatic operation;

hold it down for 3 sec. to enter advanced programming

To set the time and date;

hold it down for 3 secs. to enable or change the solar/daylight saving time

To conﬁ rm the settings

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DISPLAY

INITIAL STARTUP – TOTAL RESET

This procedure enables correct operation of the CRONO.X on ﬁ rst startup, or resets factory settings (Default settings).

Revert to factory settings – TOTAL RESET

• Place 2 alkaline batteries 1.5V – AA size, with correct polarity

• Press

: all the segments will appear on the display

• Press

within 3 secs: the reading “dEF” will appear

After a few seconds the reading “12:00” will ﬂ ash on the display.

• Press

: the minutes will ﬂ ash

• Press

: all the segments will be continuously lit, the hour, minutes and the temperature measured will appear as well as a set of small squares indicating daily programming

CRONO.X will operate in automatic mode (cfr. page 42).

• Set the time (cfr. page 41)

Default settings are:

Operation WINTER-HEATING Mode AUTOMATIC Hourly schedule MON-FRI PRG1; SAT-SUN PRG2 Temperature T0 5.0°C Temperature T1 15.0°C Temperature T2 18.0°C

Day of the week

Time

Daily temperature proﬁ le

System on – WINTER

-HEATING MODE

System on – SUMMER

-AIR-CONDITIONING

Timer on

Internal temperature

External temperature

Manual operation

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Antifreeze temperature 6.0°C Temperature control method

ON/OFF

Cut-in differential 0.3°C Automatic solar/daylight time switching

YES Winter

Summer: last Sunday in March at 2:00 AM

Summer Winter: last Sunday in October at 3:00 AM External sensor NO Date 01-May-2005

ADJUSTMENT OF TIME AND DATE

To set time and date

• Press

: the seconds will ﬂ ash

• Press

: the minutes will ﬂ ash

• To enter the minutes press or

• Press

: the hours will ﬂ ash

• To enter the hours press

• Press

: the year will ﬂ ash

• To enter the current year, press or

• Press

: the month will ﬂ ash

• To enter the current month, press

• Press

: the day will ﬂ ash

• To enter the present day, press

• Press

: the seconds will ﬂ ash again

• Press

: the device will resume normal operation

Note

If no key is pressed for 45 seconds when in the time and date programming procedure, the programmable thermostat will store the changes effected and will resume normal operation.

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AUTOMATIC OPERATION

When in automatic mode it is possible to assign one of the three available

temperatures to each of the 24 hour segments: T0, T1 or T2.

This enables the user to ﬁ nd his/her home comfortably heated in the hour segments

of his/her preference; when the user is not in or at night, the device will see to keeping a lower room temperature.

Seven preset daily temperature proﬁ les (Programs) are available for both

WINTER-HEATING and SUMMER-AIR CONDITIONING operating modes.

Each of these proﬁ les can be customized following speciﬁ c user requirements. The display will show the temperature associated to the 24 hours as follows:

- 2 “small squares” on top of each other: to adjust the temperature starting from

the set value by pressing key

(temperature T2)

- 1 “small square”: to adjust the temperature from the set-point,

by pressing key

(temperature T1)

- no “small square”: to adjust the temperature from the set-point,

by pressing key

(temperature T0)

Factory settings (Default) feature the temperature proﬁ le corresponding to Program

1 for Monday through Friday; Program 2 for Saturday and Sunday (refer to the proﬁ les on page 45).

PROGRAM SELECTION

This procedure changes operating hours and temperature proﬁ les, choosing among

the seven available preset programs, and assigning these to each of the days in the week.

1. Press

: the following reading will appear

2. Press or to select the hourly schedule to be assigned to Monday (cfr. page 45

for Winter-Heating, or page 46 for Summer-Air conditioning)

3. Press

to conﬁ rm; the day of the week will change

4. Repeat steps 2 and 3 to select the hourly schedule to be assigned to the

remaining days of the week

5. After the Sunday schedule is conﬁ rmed the device exits programming and resumes normal operation

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PROGRAM CUSTOMIZING This procedure changes the temperature proﬁ le (hourly schedule) to suit special

requirements, assigning the desired temperature to each of the 24 hour segments.

Every hour of the day can be associated 1 of the three available temperatures (T0,

T1, T2). When in SUMMER-AIR CONDITIONING MODE, temperature T0 equals system OFF A temperature change delay of 15, 30 or 45 minutes can be set for every hour. Both WINTER-HEATING programs and SUMMER-AIR CONDITIONING programs

can be customized independently. For example, program P1 for WINTER-HEATING, can feature totally different hours

and temperatures from the P1 program for SUMMER-AIR CONDITIONING.

1. Press

: the following reading will appear

2. Press or to select the hourly program that best meets the speciﬁ c requirements

3. Press

: the current time will appear (minutes will be zeroed) and the associated

“small squares” will ﬂ ash;

4. Press

or to move to the hour segment whose assigned temperature needs to be

modiﬁ ed

5. If you wish to delay the temperature change by 15, 30 or 45 minutes, press the key

below once, twice or three times

6. Press , or to select the temperature to be assigned to the hour segment

Temperature T0: no small square Temperature T1: 1 small square Temperature T2: 2 small squares on top of each other

7. Repeat the steps from 4 to 6 for all the hour segments whose associated temperature

needs to be changed

8. Press

to store the changes and make the customized hourly program available.

9. If you wish to alter another program, repeat the steps from 2 to 8.

10. Press

or to select the hourly schedule to be assigned to Monday (cfr. page 45

for Winter-Heating, or page 46 for Summer-Air conditioning)

11. Press

conﬁ rm; the day of the week will change

12. Repeat steps 10 and 11 to select the hourly schedule to be assigned to the remaining

days of the week

13. After the Sunday schedule is conﬁ rmed the device exits the programming and

resumes normal operation

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T0, T1 AND T2 temperatures correspond to the values that will be kept when

in automatic operation mode, following the selected schedule and program (temperature proﬁ le).

• Press

to set temperature T0 (no “small square”) for WINTER-HEATING mode min = +2.0°C; max = T1 for SUMMER-AIR CONDITIONING mode system off

(the display will read “---”)

• Press

to set temperature T1 (one “small square”) for WINTER-HEATING mode min = T0; max = T2 for SUMMER-AIR CONDITIONING mode min = +10°C; max = T2

• Press

to set temperature T2 (two “small squares”) for WINTER-HEATING mode min = T1; max = +35.0°C for SUMMER-AIR CONDITIONING mode min = T1; max = +35.0°C

• Press

to conﬁ rm or else wait for 45 seconds

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DEFAULT TEMPERATURE PROFILES (PROGRAMS):

WINTER-HEATING MODE

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Note: Program 7 keeps temperature T0 all day long; no “small square” will be shown

on the display

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DEFAULT TEMPERATURE PROFILES (PROGRAMS):

SUMMER-AIR CONDITIONING MODE

0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223

Note: Program 7 keeps temperature T0 all day long and the system is permanently off;

no “small square” will be shown on the display

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MANUAL OPERATION

Manual operation is enforced when one wishes to temporarily discontinue

Automatic operation and set a different temperature.

Then the temperature will not be governed by the program schedule, but by the

manually selected temperature: In this case CRONO.X will behave as an ordinary thermostat.

This status is indicated by the symbol

on the display.

MANUAL OPERATION SELECTION

1) Press

: the reading

will appear, in which the temperature to be set ﬂ ashes (time, day and temperature

may differ from the example)

2) Press or to set the desired temperature

3) Press to conﬁ rm or wait for 45 seconds; the display will then read the time, the temperature measured and the icon

; the reading “SET” will disappear

SETTING THE MANUAL TEMPERATURE

1) Press

or : the reading “SET” will appear up on the right and the temperature

previously set in manual mode will ﬂ ash

2) Press or to set the desired temperature

3) Press

to conﬁ rm or else wait for 45 seconds: the display will read the

temperature measured again

To exit the manual operation mode

Press

for 3 seconds: the device will resume automatic operation mode and the

icon

will disappear

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DEVICE OFF

When in this status the programmable thermostat is completely disabled or else it

keeps the antifreeze temperature (which can be altered by the user).

The antifreeze temperature is determined by the parameter “OFF” in

Advanced Programming (cfr. pages 56 and 58).

The Antifreeze default temperature is 6°C but can be set from 1°C to 10°C.

To shut down the system set “---”

When in OFF status, the time, day of the week and the temperature will still be read.

To select the off operation status

Press

: only the time, day and temperature will be displayed.

To exit the off operation status

Press

: the device will resume the previous operation mode (Manual or

Automatic).

WINTER-HEATING /SUMMER-AIR CONDITIONING

OPERATION MODES

CRONO.X controls both Heating and Air-conditioning systems. Depending on the selection, the device’s control mode is indicated by the ﬂ ame icon

for WINTER – HEATING or by the snowﬂ ake icon for SUMMER – AIR-

CONDITIONING.

The factory setting is WINTER-HEATING.

To select winter-heating or summer-air conditioning:

1) Press

using a sharp tool, the display will read

(WINTER-HEATING operation)

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2) Press or to select SUMMER-AIR CONDITIONING

3) Press to conﬁ rm or else wait for 45 seconds

TIMER-CONTROLLED OPERATION

This very useful function makes it possible to temporarily change, for

a user-deﬁ nable term, the normal functioning of the programmable thermostat.

The timing can be selected in hours (max 99) or days (max 99) and is indicated by

the symbol

There are three types of timer-controlled operation:

TIMER-CONTROLLED OFF TYPE

The starting operating mode is OFF and it is kept for a determined term (hours

or days), after which the device resumes the previous operating mode (Manual or Automatic).

This type of timer-controlled operation can be used during vacations, so

that automatic mode is discontinued.

TIMER-CONTROLLED MANUAL TYPE

The Starting operating mode is MANUAL and it is kept for a determined term (hours

or days), after which the device resumes Automatic operation.

This type of timer-controlled operation can be used to keep for a few hours (or

days) a temperature different from the Automatic set-point.

For example, this can be selected on a very chilly winter evening, to raise the

temperature for a couple of hours using the manual operation mode. Then the user will not need to remember to set the CRONO.X back to automatic before going to bed.

TIMER-CONTROLLED AUTOMATIC TYPE

The Starting operating mode is AUTOMATIC and it is kept for a determined term

(hours and days), after which the device switches back to the OFF mode.

This is used to switch the CRONO.X off for a certain time or a day when

nobody is going to be in.

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If the timing is in hours, the timer trips when the hour expires; if it is in days, the

timer trips at midnight.

If during a timing term the operation mode is switched – for example from timer-

controlled manual to automatic or off, the timing is called off.

The timer count includes the hour in which the programming occurs; similarly, if

the timing is in days, the count also includes the current day.

E.g.: if the timer is set at 13:52 and it is set for 1 hour, it will trip when the hour

elapses, i.e. at 14:00.

If the clock is adjusted when the timer is set, the latter will not be updated.

To select timer-controlled operation

1) Press

the display will read

and “00” will ﬂ ash

2) To set the timer in hours, press

: the reading

will appear, with “00” ﬂ ashing

3) To set the timer (in hours or days), press

4) Press

to conﬁ rm or wait for 45 seconds; the icon will stay lit on the display

until the timing expires

CONTROL BY TELEPHONE DIALLER

The CRONO.X programmable thermostat can be remote-controlled

through a telephone.

This feature is especially useful to control the heating in second homes, as this

makes it possible to prepare a warm environment.

To implement this function it is necessary to connect up a device or dialer that

receives calls or SMSs and interfaces with the programmable thermostat.

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Phone dialers are available for landline phones (VN782900 X.Code Wave) or

for GSM cellular phones (VE072500 X.Code Bus).

• Using the X.CODE BUS and RS485 serial communication protocol it is possible to change the CRONO.X operation mode (Manual, Automatic or OFF), change the temperature set-point, and receive on a cell phone a message summarizing the settings and the temperature measured in the premises.

• The use of the X.CODE WAVE or X.CODE BUS with the output relay clean contact, makes it possible to switch the operation mode of the CRONO.X from Manual or Automatic to Off and the other way round.

Dialer clean contact OPEN

Operating mode AUTOMATIC or MANUAL

Dialer clean contact CLOSED Operating mode OFF

(Antifreeze temperature where enabled)

In this case it is not possible to receive the measured temperature reading.

CONFIGURATION FOR X.CODE BUS (code VE072500) WITH RS485

After connectig the two terminals OUT BUS in the CRONO.X up to those marked

BUS on the X.CODE BUS, respecting polarity.

• Go to Advanced Programming (cfr. pages 57-59) and set the “bUS” parameter to Yes

• Conﬁ rm by

• The “Adr” – memory address – will appear

• Hold down the ON/OFF key in the X.CODE BUS for at least 5 seconds: the ON/OFF led will ﬂ ash

• Wait for approximately 10-20 seconds: as soon as the ON/OFF led stops blinking: the phone dialer will be conﬁ gured

• Press

on the CRONO.X to conﬁ rm all the remaining Advanced Programming

parameters, or else allow 45 seconds to return to normal operation

As for how to send SMS messages to switch the device on or off, refer to the

instructions for the X.CODE BUS.

CONFIGURATION FOR X.CODE WAVE (code VN782900), X.CODE BUS (code VE072500) and for PHONE DIALERS WITH CLEAN OUTPUT CONTACT

After connectig the 2 OUT BUS terminals in the CRONO.X up to those marked as

relay output contacts in the X.CODE WAVE, X.CODE BUS or other dialer for landline phone or GSM cell phone with a clean output contact.

• Go to Advanced Programming (cfr. pages 57-59) and set the “bUS” parameter to n0

• Conﬁ rm by

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• Press to conﬁ rm all the remaining Advanced Programming parameters, or else allow 45 seconds and return to normal operation

As for how to send the commands switching the device on or off, refer to the

instructions for the X.CODE WAVE, X.CODE BUS or relevant phone dialer.

OTHER AVAILABLE FUNCTIONS

SETTINGS GUARD (PASSWORD)

When enabled, this function inhibits keyboard operation. Changing any parameter is only allowed after a special conﬁ guration area has

been accessed and the correct password has been entered (number from 000 to 999).

The password is selected in parameter “PAS” of the Advanced Programming area (cfr.

pages 57 and 59).

The default password is 123.

To enable the settings guard

• From the Automatic, Manual or OFF operating modes:

hold down the keys

simultaneously for a few seconds;

the display will read

and will resume the previous operation mode (Automatic, Manual or off)

To disable the settings guard

• Hold down the keys

simultaneously for a few seconds

• To select the password (parameter “PAS” – Advanced Programming), press

• Press

to conﬁ rm

AUTOMATIC SOLAR/DAYLIGHT TIME SWITCHING

CRONO.X changes the time from daylight saving to solar on the last Sunday

in March at 02:00; from solar to daylight saving on the last Sunday in October at 03:00.

This function too can be disabled, or else the date and hour in which the time switch

occurs can be changed.

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To alter the solar-daylight saving time switch

Hold down for approximately 3 seconds: the following reading will appear

(If the reading is “[hange 0FF” press or to switch it to “0N”)

• Daylight saving time solar time switching

1) Press

to conﬁ rm: the following reading will appear

2) Press to change the settings: “LST” will ﬂ ash

3) Press

or to select the week of the month in which the Daylight saving Solar time switch is to take place (“1ST” for ﬁ rst, “2ND” for second, “3RD” for third, “4TH” for fourth, “LST” for last)

4) Press

to conﬁ rm: the Sunday segment will ﬂ ash

5) Press

or to select a day of the week

6) Press

to conﬁ rm: “03” will ﬂ ash

7) Press

or to select a month

8) Press

to conﬁ rm: “02:00” will ﬂ ash

9) Press or to select the time

10) Press

to conﬁ rm: All segments will be continuously lit

• Solar time daylight saving time switching Press

: the following reading will appear

Follow the instructions from step 2) to 9)

Press

to conﬁ rm and exit the settings

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MAXIMUM AND MINIMUM DAILY TEMPERATURE

CRONO.X stores the external and internal minimum and maximum values

measured over the day (external temperature only if an external sensor is

provided).

• To view these values just press

(for the minimum temperature) or (for the

maximum temperature)

This function is available when in Automatic and off mode, but not when

in manual mode.

• To set the minimum or maximum readings to zero, just hold down or for at

least 3 seconds until the display reads “---”

The maximum value will be identiﬁ ed as “KI”, the minimum as “Lo”.

LOW BATTERY LEVEL INDICATOR

When the batteries are about to be dead the display will start to ﬂ ash. When in this condition, relay changeover is not guaranteed: it is therefore advisable

to replace the batteries (cfr. page 60 “BATTERY REPLACEMENT”).

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ADVANCED PROGRAMMING

Advanced programming makes it possible to change some parameters and view some

system data.

The user-selectable parameters are:

PARAMETER READING DEFAULT PARAMETER RANGE NOTES

Temperature control method

rEG 0

= ON/OFF

= PROPORTIONAL

Control band (ONLY when rEG=P and WINTER-HEATING operating mode)

bnd

00.5 °C 00.5°C ÷ 05.0°C

Control period (ONLY when rEG=P and WINTER-HEATING operating mode)

PEr

10 minutes 10 – 20 – 30 minutes

Differential (ONLY when rEG=O)

dIF

00.3 °C 00.1°C ÷ 01.0 °C

Antifreeze temperature (only when in WINTER-HEATING mode)

0FF

06.0 °C

01.0 °C ÷ 10.0 °C “---” = disabled

The temperature is kept pressing the OFF key

Unit of measurement

deg

C=Celsius F= Fahrenheit

External sensor

ESt n0

= not provided

YES

= external sensor

is connected

External probe X.TEMP code VN883500 (optional)

Control sensor ONLY when ESt=YES)

SnS Int

Int

= internal

ESt

= external

RS485 output enabled (Out Bus)

bUS

YES

= enabled

= disabled

Phone-control output

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Memory address (ONLY when bUS=YES)

Adr

Upon initial start-up procedure, default parameters are enforced an a new address is generated

Settings guard password

PAS

123 000 ÷ 999

For use in public premises

Total number of hours of output operation

Tot

000 000 ÷ 65535 (7 years)

Total number of hours when output relay in ON status

Battery charge status

bAt

100% ÷ 0%

The initial value depends on the battery charge

Display brightness adjustment

(nt

8 0 ÷ 15

To enter advanced programming and change the parameters

1) Hold down

for 3 secs until the display reads “rEG”

2) Press or to select the desired value

3) Press

to conﬁ rm

4) Repeat steps from 2) to 3) to change the remaining Advanced Programmimg parameters

5) After conﬁ rming the parameter “(nt” the device resumes the previous operating status (Automatic, Manual or System Off)

Description of advanced programming parameters

TEMPERATURE-CONTROL METHOD (rEG)

The choice of the temperature-control method depends on the features of the system

it is applied to.

In most cases ON/OFF temperature-control is recommended (which is

the default choice), but Proportional temperature control is preferable in premises with a high thermal drift (large rooms, fan-coil systems, cast-iron radiators, etc)

The Proportional method can only be selected for the WINTER-HEATING

mode.

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• On/off temperature control (0) It is the common control method with most thermostats and programmable

thermostats. This methods ensures accurate temperature control in nearly all systems. When in the ON/OFF control method, CRONO.X’s behavior depends on a user-

deﬁ nable parameter: The cut-in differential (dIF), also called hysteresis.

- Winter-heating The system connected to the output of the programmable thermostat will be

switched on when the temperature drops below the set-point by a value equaling the cut-in differential (dIF); the system is switched off when the temperature setpoint is exceeded.

E.g.: Tset = 20.0°C; dIF = 00.3°C (Tset = Manual or Automatic temperature set-

point).

When the temperature drops below 19.7°C (Tset-dIF), the system switches on and

stays on until the temperature exceeds 20.0°C (Tset).

- Summer-air conditioning The system connected to the output of the programmable thermostat will be

switched on when the temperature exceeds the set-point by a value equaling the cut-in differential (dIF); the system is switched off when the temperature drops below the set-point.

E.g.: Tset = 20.0°C; dIF = 00.3°C (Tset = Manual or Automatic temperature set-

point).

When the temperature exceeds 20.3°C (Tset+dIF), the system switches on and stays

on until the temperature drops below 20.0°C (Tset).

• Proportional temperature control (p)

This temperature-control method improves performance with some particular

systems, and helps keep a constant temperature in the premises. It ONLY applies to WINTER-HEATING operation, whether in Automatic or Manual

mode. It is deﬁ ned by two parameters:

- Control band (bnd; 0.5°C ÷ 5.0°C)

- Control period (Per; 10 min – 20 min – 30 min) In the interval deﬁ ned by the Control Period (Per), 10 – 20 – 30 minutes, the output

will switch to ON for a time span that is proportional to the difference between the

set-point and the temperature measured. At the end of every Control Period, CRONO.X reads the temperature measured and

compares it with the set-point: based on the difference between the 2 values, it then

keeps the output ON for a proportional time accordingly.

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When the temperature measured is close to the set-point, the output will stay ON for

a short time calculated on the total Control Period (Per) (e.g. 2 min for Per = 20 min).

When the temperature measured is far from the set-point, the output will stay ON

for nearly all the Control Period (e.g. 19 min for Per = 20 min).

If the temperature measured is lower than the set-point and the difference is greater

than the Control band value (bnd), then the output will stay ON for the entire Control Period.

If the temperature measured is higher than the set-point and the difference is greater

than the Control band value (bnd), then the output will stay OFF for the entire Control Period.

Notes on the selection of proportional control parameters

Optimized Proportional Control depends on a correct choice of parameters.

Control Period Selection (PEr):

10 min for low thermal-drift systems (fan-coil type) 20 min for medium thermal-drift systems (e.g. aluminum radiators) 30 min for high thermal-drift systems (e.g. cast-iron radiators)

Control Band Selection (bnd):

wide band (5°C) for systems with a high thermal gradient narrow band (0.5°C) for systems with a low thermal gradient

EXAMPLES fan-coil system

bnd = 3.0°C PEr = 10 min

radiator system

bnd = 0.5°C PEr = 20 min

ANTIFREEZE TEMPERATURE (0FF)

Enabled ONLY for WINTER-HEATING operation. Denotes the temperature that is kept when the programmable thermostat is in

OFF status (key

It can be set from 1°C to 10°C; factory setting is 6.0°C. It can be overridden selecting “---”.

UNIT OF MEASUREMENT (dEG)

To select the unit of measurement in degrees Celsius (C) or Fahrenheit (F). For degrees °C, the minimum increase is 0.1°C. For degrees °F, the minimum increase is 0.2°F.

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SONDA ESTERNA (Est)

When enabled, this parameter displays the temperature measured by the external

sensor model X.TEMP code VN883500 (optional) connected to the dedicated

terminal (EXT NTC). Temperature range: -40.0°C ÷ +60.0°C. The external sensor can be installed at a maximum distance of 40 meters.

TEMPERATURE CONTROL SENSOR (SnS)

This parameter can only be viewed if the external sensor is enabled (ESt = YES). It determines whether temperature control will be based on the temperature

measured by the built-in sensor (Int) or by the External sensor (ESt).

ENABLING RS485 OUTPUT (bUS)

The terminals marked OUT BUS are dedicated to the remote control of CRONO.X

through a phone dialer. Select “YES” if the phone dialer connected is a X.CODE BUS code VE072500 for the

GSM network and RS485 serial communication is used. Select “nO” if the phone dialer connected provides a potential-free contact; (e.g.

VN782900 X.CODE WAVE for landline phone and X.CODE BUS for GSM network

used with a relay output). As for operating the CRONO.X with a phone dialer, cfr. page 50.

MEMORY ADDRESS (Adr)

This can only be viewed if (bUS = YES). It is a numeric value that identiﬁ es the device when connected to other devices (e.g.

X.CODE BUS) through RS485 communication.

SETTINGS GUARD PASSWORD (PAS)

This is very useful when only authorized users are allowed to alter the

settings (e.g.. ofﬁ ces, public premises, schools,…).

The selection may range between 000 and 999. As for the instructions to enable the password-controlled settings, cfr. the description

page 52.

TOTAL OPERATING HOUR COUNT (tot)

The value indicates the number of hours in which the output relay was ON, i.e. when

the contact between COM and NA was closed.

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BATTERY CHARGE STATUS (bAt)

It indicates the battery charge percentage. A full battery charge (100%) corresponds to 2.8V battery voltage; 0% corresponds to

1.8V (dead batteries).

DISPLAY BRIGHTNESS ADJUSTMENT (Cnt)

It is meant to improve the CRONO.X display view by adapting it to the light

existing in the premises in which it is installed.

Brightness ranges from 0 (light) and 15 (dark). Default value is 8. A brighter display uses more power and therefore causes battery autonomy to be

shorter.

BATTERY REPLACEMENT

Use alkaline batteries only 2 x 1.5V (LR6 – AA size) After removing the old batteries, place the new ones within one minute to avoid

erasing the time and date settings (all the other settings will stay stored).

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ERROR MESSAGES

When there is a fault that prevents correct operation, e.g. failure of the temperature-

control sensor, the display reads “---” in place of the relevant temperature reading

(from internal or external sensor).

• In case of sensor failure when CRONO.X is in WINTER-HEATING mode, the

relay will go on for 10 minutes every 4 hours to prevent the system from

freezing

• In case of sensor failure when CRONO.X is in SUMMER/AIR-CONDITIONING

mode, the relay will stay permanently off

CONNECTION

8A / 250V~

NC COM

EXT NTC OUT BUS

Relay output

The system control must be connected between the relay output contacts COM

and NA. The relay contact is potential free (clean contact). The maximum contact capacity is 8A/250Vca

External sensor (EXT NTC)

An optional NTC temperature sensor model X.TEMP (code VN883500) can be

connected between terminals EXT NTC This sensor can be placed at a maximum distance of 40 m (use a shielded cable). The X.TEMP sensor can be used to read the temperature in another room or to

control the temperature (only when SNS=YES and REG=EST).

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Input for telephone dialer (OUT BUS)

The CRONO.X can be remote-switched on and off through a phone dialer. It is possible to connect a landline dialer (X.CODE WAVE code VN782900) or

GSM dialer (X.CODE BUS code VE072500) or other dialer with a clean output contact, between the OUT BUS terminals.

When connecting up a X.CODE BUS code VE072500 that uses the RS485 output, it is

necessary to observe the correct connection polarity.

HARMONISED REFERENCE STANDARDS

Conformity with EU Directives:

2006/95/EEC amended by 93/68/EEC (Low Voltage Electrical Equipment) 89/336/EEC amended by 92/31/EEC and 93/68/EEC (EMC)

is declared with reference to the following harmonized standards:

Safety:

EN 60730-2-7: “Automatic electrical controls for household and similar use.

Part 2: Particular requirements for timers and time switches”

EN 60730-2-9: “Automatic electrical controls for household and similar use.

Part 2: Particular requirements for temperature sensing controls”

Electromagnetic compatibility:

EN 61000-6-1: “Electromagnetic compatibility (EMC) - Part 6-1: Generic standards -

Immunity for residential, commercial and light-industrial environments”

EN 61000-6-3: “Electromagnetic compatibility (EMC). Part 6-3: Generic standards -

Emission standard for residential, commercial and light-industrial environments”

Vemer S.p.A.

I - 32032 Feltre (BL) Via Camp Lonc, 16 Tel +39 0439 80638 Fax +39 0439 80619

e-mail: info@vemer.it - web site: www.vemer.it

V3IS00411-010

Vemer Crono.X, VE081600 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual