Vemer Crono.X User manual

English
ELECTRONIC
PROGRAMMABLE
THERMOSTAT
Crono.X
User Manual

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User Manual - CRONO.X programmable thermostat
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User Manual - CRONO.X programmable thermostat
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Table of contents
Safety instructions pag. 34
Technical specifications 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 profiles pag. 45
- Summer temperature profiles 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
- Configuration for X.CODE BUS pag. 51
- Configuration 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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User Manual - CRONO.X programmable thermostat
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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 qualified 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 - CRONO.X programmable thermostat
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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 specifically, 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-defined 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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User Manual - CRONO.X programmable thermostat
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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 profiles 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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User Manual - CRONO.X programmable thermostat
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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 flow.
Installing the programmable thermostat about 150 cm from the floor is
recommended.
Mounting can be on a wall or on a 503 box.
PLACEMENT REMOVAL

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User Manual - CRONO.X programmable thermostat
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FRONT FLAP OPENING
DIMENSIONS (mm)
123.0
93.5
33.5

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User Manual - CRONO.X programmable thermostat
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DEVICE DESCRIPTION
FRONT VIEW
0369121518
21
.. .. .. .. .. .. .. ..
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 confirm the settings

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User Manual - CRONO.X programmable thermostat
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DISPLAY
INITIAL STARTUP – TOTAL RESET
This procedure enables correct operation of the CRONO.X on first 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 flash on the display.
• Press : the minutes will flash
• 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
profile
System on
– WINTER
-HEATING MODE
System on
– SUMMER
-AIR-CONDITIONING
Timer
on
Internal
temperature
External
temperature
Manual
operation

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User Manual - CRONO.X programmable thermostat
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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 flash
• Press : the minutes will flash
• To enter the minutes press or
• Press : the hours will flash
• To enter the hours press or
• Press : the year will flash
• To enter the current year, press or
• Press : the month will flash
• To enter the current month, press or
• Press : the day will flash
• To enter the present day, press or
• Press : the seconds will flash 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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User Manual - CRONO.X programmable thermostat
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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 find 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 profiles (Programs) are available for both
WINTER-HEATING and SUMMER-AIR CONDITIONING operating modes.
Each of these profiles can be customized following specific 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 profile corresponding to Program
1 for Monday through Friday; Program 2 for Saturday and Sunday (refer to the
profiles on page 45).
PROGRAM SELECTION
This procedure changes operating hours and temperature profiles, 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 confirm; 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 confirmed the device exits programming and resumes
normal operation

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User Manual - CRONO.X programmable thermostat
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PROGRAM CUSTOMIZING
This procedure changes the temperature profile (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 specific requirements
3. Press : the current time will appear (minutes will be zeroed) and the associated
“small squares” will flash;
4. Press or to move to the hour segment whose assigned temperature needs to be
modified
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 confirm; 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 confirmed the device exits the programming and
resumes normal operation

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User Manual - CRONO.X programmable thermostat
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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 profile).
• 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 confirm or else wait for 45 seconds

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User Manual - CRONO.X programmable thermostat
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DEFAULT TEMPERATURE PROFILES (PROGRAMS):
WINTER-HEATING MODE
P1
T2
T1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
P2
T2
T1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
P3
T2
T1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
P4
T2
T1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
P5
T2
T1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
P6
T2
T1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
P7
T2
T1
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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User Manual - CRONO.X programmable thermostat
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DEFAULT TEMPERATURE PROFILES (PROGRAMS):
SUMMER-AIR CONDITIONING MODE
P1
T2
T1
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223
P2
T2
T1
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223
P3
T2
T1
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223
P4
T2
T1
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223
P5
T2
T1
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223
P6
T2
T1
0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223
P7
T2
T1
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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User Manual - CRONO.X programmable thermostat
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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 flashes (time, day and temperature
may differ from the example)
2) Press or to set the desired temperature
3) Press to confirm 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 flash
2) Press or to set the desired temperature
3) Press to confirm 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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User Manual - CRONO.X programmable thermostat
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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 flame icon
for WINTER – HEATING or by the snowflake 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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User Manual - CRONO.X programmable thermostat
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2) Press or to select SUMMER-AIR CONDITIONING
3) Press to confirm or else wait for 45 seconds
TIMER-CONTROLLED OPERATION
This very useful function makes it possible to temporarily change, for
a user-definable 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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User Manual - CRONO.X programmable thermostat
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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 flash
2) To set the timer in hours, press : the reading
will appear, with “00” flashing
3) To set the timer (in hours or days), press or
4) Press to confirm 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.