Vemer Chronos Key User manual

Cronotermostato
Digitale
CHRONOS KEY
Manuale d’Uso
User Manual
DIGITAL PROGRAMMABLE THERMOSTAT

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CHRONOS KEY Programmable Thermostat User Manual
■Dimensions Page 4
■Connection diagram Page 4
■Safety warnings Page 5
■Technical specifications Page 6
■Display and keypad Page 7
■Installation Page 9
■Programming menu Page 12
- Time and date modification Page 12
- Programs modification Page 12
- Temperatures T1, T2, T3 modification Page 14
- Timing setting Page 16
- Advanced functions menu Page 17
■Manual operation Page 21
■Off operation Page 22
■Backlight management Page 24
■Minimum and maximum value Page 25
■Summer time change Page 25
■Regulation type Page 27
■Timings: what they are Page 29
■Instrument reset Page 31
■Battery replacement Page 31
■Reference standards Page 32
■Default values Page 33
■Winter preset programs Page 34
■Summer preset programs Page 35
Index

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CHRONOS KEY Programmable Thermostat User Manual
Digital programmable thermostat CHRONOS KEY
• Summer and winter operating mode
• Models available in white and black
colours
• Battery or 230 V power supply
• 7 programs available for the heating
mode
7 programs available for cooling mode
• Wall-mounted or covered installation
of box 503
• Weekly programming with 3 different
settable temperatures

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CHRONOS KEY Programmable Thermostat User Manual
Digital programmable thermostat CHRONOS KEY
Model Chronos Key
230 Bianco
Chronos Key
230 Nero
Chronos Key
Bianco
Chronos Key
Nero
Power supply
230Vac 50/60 Hz batteries 2 x 1,5V (type AAA)
Display blue backlight
(can be switched off)
blue backlight
(activated with a key touch
for 30 seconds)
Digital input — Configurable as input for
external probe or phone dialler
Installation Wall-mounting
(or to cover three-module built-in box)

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CHRONOS KEY Programmable Thermostat User Manual
DIMENSIONS
CONNECTION DIAGRAM
COM
NA NC
NL
230V~
COM
NA NC
CONTATTO
ESTERNO
COM
NA NC
NL
230V~
COM
NA NC
EXTERNAL
CONTACT
Thalos 230
Thalos
With external contact closed:
Setpoint = Setpoint programmed- 3°C
CONTATTO
CESTERNO
se contatto esterno chiuso:
Chronos spento
Chronos Key 230 Chronos Key
AUX

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CHRONOS KEY Programmable Thermostat User Manual
■During product installation and operation it is necessary to observe the
following instructions:
1) The instrument must be installed by a qualified person, in strict compliance
with the connection diagrams.
2) Do not power or connect the instrument if any part of it is damaged.
3) After installation, inaccessibility to the connection terminals without
appropriate tools must be guaranteed.
4) The instruments must be installed and activated in compliance with current
electric system standards.
5) Before accessing the connection terminals, verify that the leads are not live.
6) In the electrical system of the building where the instrument must be
installed, a switch and a protection device from the overcurrents must be
present (for Chronos Key 230 models only).
Code Model Description
VE725800 Chronos Key Bianco Programmable thermostat with battery in white
VE726600 Chronos Key Nero Programmable thermostat with battery in black
VE727400 Chronos Key 230 Bianco Programmable thermostat 230 V in white
VE728200 Chronos Key 230 Nero Programmable thermostat 230 V in black
SAFETY WARNINGS
Electronic touch screen programmable thermostats series with wall-mounting suitable
for the temperature control in household. Two versions are available:
■CHRONOS KEY, battery-powered, with a blue backlight display and with an input
for the connection of an external temperature probe or an external contact to switch
on/off the remote programmable thermostat (by telephone).
■CHRONOS KEY 230, mains powered supply, with a blue backlight display.
These instruments perform actions of 1B type and are intended for operating in
environments Pollution degree 2 and Overvoltage Category III (EN 60730-1).

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CHRONOS KEY Programmable Thermostat User Manual
TECHNICAL SPECIFICATIONS
• Power supply Chronos Key:
– 2 alkaline batteries 1.5 V (AAA type)
– battery life: 1 year
– battery charge level indication
– charge reserve ( for battery replacement): 1 minute
• Power supply Chronos Key 230:
– 230Vac (-15% ÷ +10%) 50/60Hz
– maximum consumption: 6 VA / 230Vac
– charge reserve ( for blackout): 2 days about
• Wall mounting or to coverage three-module in built box
• Terminals Chronos Key:
– 3 terminals for 1.5 mm² cable section for bistable output relay 5A / 250 Vac
– 2 terminals for 1.5 mm2cable section for digital input (external probe or on/off
with telephone activator)
• Terminals Chronos Key 230:
– 3 terminals for 1.5 mm2cable section for monostable output relay 5A / 250 Vac
– 2 terminals for 1.5 mm2cable section for power supply
• Temperature regulation:
– On/off with hysteresis setting between 0,1 °C and 1°C
– Proportional with settable band and period
• Summer/winter operating mode
• Weekly programming (7 programs available for each operating mode)
• Daily resolution: 1 hour (possibility to set delay activation of 15, 30, 45 minutes
independent for each hour)
• 5 settable temperatures:
– T1, T2, T3 in automatic operation
– Tm in manual operation
– Toff in off mode (antifreeze)
• Measured temperature display: 0 ÷ 50 °C
• Measurement precision: ±0.5 °C: ±0.5 °C
• Measured temperature resolution: 0.1°C
• Setpoint range: 2 ÷ 35 °C
• Clock precision: ±1 second/day
• Key lock by password
• Summer/winter time automatic change (excludable)
• Operating temperature: 0 ÷ +50 °C
• Storage temperature: -10 ÷ +65 °C
• Operating humidity: 20÷90% non condensing
• Protection degree: IP40
• Insulation: reinforced among accessible parts (frontal) and all other terminals

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CHRONOS KEY Programmable Thermostat User Manual
① Day of the week (DAY 1 = Monday)
②
Programming menu:
: date/time and summer time setting
: programs change mode (for automatic operating)
: temperatures setting T1, T2. T3
: timing menu
: advanced programming menu
: not used
: not used
③
Time and minutes
④ Load activation in summer mode/ cooling
⑤ Manual operation activation
⑥ Load activation in winter mode/heating
⑦ Measured environment temperature
⑧ Graphic of the active program for the current date (in automatic operation)
⑨ Off operation
⑩ Measured temperature of the external probe
DISPLAY AND KEYPAD

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CHRONOS KEY Programmable Thermostat User Manual
■ Keypad
The keys have different functions according to the instrument status and they will be
described step by step in this user manual.
Multipurpose keys are not built into the instrument, that is to say contemporary
pressures of 2 or more keys.
There are two types of pressure:
- brief pressures,
- long pressures, with duration higher than 3 seconds.
During the press of a key, the display is blue.
■Cleaning the display
To clean the display use a soft, lint-free cloth, without using excess force.

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CHRONOS KEY Programmable Thermostat User Manual
INSTALLATION
• The programmable thermostats of Chronos Key series are designed for wall-
mountig. Alternatively, they can be installed to cover three-module built-in box.
• The programmable thermostat must be installed at a height of about 1.5 m above
the floor, keep away from direct sunlight, far from doors, windows, heat sources,
locations with excess or total lack of ventilation.
 Connect the wires to the terminal
blocks of the base, as shown in the
“connection diagram”.
 Fix the base on the wall using the
screws supplied.
 Only for battery power supply models
only: insert the batteries into the
battery compartment on the back
of the programmable thermostat,
respecting the polarity
 Hook the programmable thermostat
to the base, at first matching teeth
with the higher side.
1
1
2

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CHRONOS KEY Programmable Thermostat User Manual
• Clock setting
Once the instrument is mains powered, set the clock (time and date insertion).
The parameters to enter are the following:
seconds (only synchronisation at value 00), minutes, hours, year, month, day.
Use the keys and to increase and decrease the values and the key to
confirm and move to the next parameter.
Seconds synchronisation
Minutes setting
Time setting
Year setting
Month setting
Day setting
Once all values are set, press the key for a long time to exit the menu of the
clock synchronisation.

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CHRONOS KEY Programmable Thermostat User Manual
Now the programmable
thermostat will begin to operate
with the set default parameters
(see page 33) displaying the
day of the week, the time, the
environment temperature and the
graphic of the active program.
DAY TEMPERATURE HOUR
Attention:
To operate correctly the programmable thermostat requires the time and date
insertion.
If once mains powered, no value is
set within about 30 seconds, the
programmable thermostat begins
to operate in off mode, displayed
with the symbol . The time lack
is displayed with flashing dashes
( _ _:_ _ ).
The programmable thermostat stays in off operation condition until the hour
is not inserted, ensuring the maintenance of the antifreeze temperature (6°C)
anyway.
In this way, the pressure of any key reactivates the menu of date/time
insertion for about 30 seconds.
PROGRAM
GRAPHIC

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CHRONOS KEY Programmable Thermostat User Manual
PROGRAMMING MENU
With this menu it is possible to modify the
following operating parameters:
- Date and time
- Automatic operation programs
- Automatic operation temperatures
- Timings
- Advanced functions.
Time and date modification
To modify set hour and date:
1. From normal operating display, press the key for a long time until the symbol
starts flashing on field (2)
2. Press the key to enter parameters modification. The seconds field starts
flashing. Parameters sequence to set:
seconds* -> minutes -> hours -> month ->day
3. Use the keys and to modify the values and the key to confirm
moving to the next parameter.
(*) for seconds it is possible only the synchronisatin at value 00
4. Once all parameters are set, to exit and to go back to the programming menu, press
the key for a short time.
To exit and to go back to the normal operation (automatic, manual) press the key
for a long time or wait for the time-out expiration (about 30 seconds).
Inside this menu it is also possible to modify the parameters for winter/
summer time change. The procedure is described in a detailed way in the
chapter “Summer time change” on page 25.
Programs modification
This menu allows to modify the programmings of the automatic operation.
In default status the instrument is configured to perform the program P1 from Monday
Inside this menu it is also possible to modify the parameters for winter/
summer time change. The procedure is described in a detailed way in the
chapter “Summer time change” on page 25.
3s

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CHRONOS KEY Programmable Thermostat User Manual
to Friday and P2 on Saturday and on Sunday (the programs profile is described at the
end of this manual on page 34-35).
If this programming does not satisfy the user needs it is possible to change it.
To modify the programming:
1. From the normal operation display, press the key for a long time until the
symbol starts flashing on field (2)
2. Press the key for a short time until the symbol flashes and press the key
to enter the parameters modification.
3. The programs page is displayed:
the first day of the week (DAY 1) flashing,
the current program (for example P1) of the
current operating mode ( or ) and the
corresponded profile of the program.
3.1. If the set program is good, move to the
next day with the keys and .
3.2. If the set program is not good, press the
key .
The set program flashes: choose a
different program among the 7 available
programs pressing the keys and
.
3.2.1. If no program exactly satisfies the
user’s needs, choose any program
which best meet them and
press the key to enter the
modification of the program profile.
On field (3) 00:00 appears while
on field (7) flashes the temperature
level (T1, T2 or T3) set for that
specific time (00:00).

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CHRONOS KEY Programmable Thermostat User Manual
Use the keys and to
change the temperature level and the
key to move to the next hour.
Set the desired level temperature for
each hour of the day.
3.2.1.1. For each hour it is possible to
delay the start of the regulation
of 15’, 30’ or 45’
After setting the temperature
as described above, press the
key for a long time to set
a delay.
The minutes field flashes
(field 3): set with the keys
and the delay and press
the key to move to the
next hour.
4. When the program satisfies the user’s needs, go back to the day pressing twice the
key and repeat the operation for the other days of the week.
When all modifications have been performed, exit the programming menu pressing
the key for a long time.
Temperatures T1, T2, T3 modification
To modify the 3 temperatures of automatic operation:
1. From the normal operation display,
press the key for a long time until the
symbol starts flashing on field (2)
2. Press the key for a short time until the
symbol flashes. Press the key to
enter the parameters modification.
3s

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CHRONOS KEY Programmable Thermostat User Manual
3. The value of the flashing T1 temperature is
displayed. Modify the value with the keys
and and press the key to
move to the modification of T2.
4. The value of the flashing T2 temperature is
displayed. Modify the value with the keys
and and press the key to
move to the modification of T3.
5. The value of the flashing T3 temperature is
displayed. Modify the value with the keys
and and press the key to
go back to the page of T1 temperature.
6. Once all parameters are set, to exit and go
back to the programming menu, press the
key for a short time.
To exit and go back to the normal operation
press press the key for a long time or
wait for the time-out expiration (about 30
seconds).
Attention: the temperature set values
must respect the condition:
T1 ≤ T2 ≤ T3.
In cooling mode T1 is not
settable and equals off system.

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CHRONOS KEY Programmable Thermostat User Manual
Timing setting
This menu allows the setting of a timing on the current operating mode, expressed in
hours and days.
For further information about timings, see the chapter “Timings: what they
are” on page 29).
To set a timing:
1. From the normal operation display, press the key for a long time until the
symbol starts flashing on field (2)
2. Press the key for a short time until the
symbol flashes and press the key
to enter the parameters modification.
3. The value of the set timing currently flashes
(00= no timing). Enter the timing value
(from 1 to 99) with the keys and
and press the key to move to the
measurement unit change (hours and days).
4. The measurement unit starts flahing (hour
or day). Press the keys and to
choose a timing in hours (h0ur) or days
(day).
For further information about timings, see the chapter “Timings: what they
are” on page 29).

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CHRONOS KEY Programmable Thermostat User Manual
5. Once all parameters are set, to exit and to go back to the programming menu, press
the key for a short time.
To exit and go back to the normal operation (automatic, manual) press the key
for a long time or wait for the time-out expiration (about 30 seconds).
If a timing is active, the display shows the symbol .
To interrupt a timing, enter again the menu and set the value 00.
Advanced functions menu
With the ADV menu it is possible to modify the following operation parameters:
- operating mode (heating or cooling)
- regulation type (on-off or proportional)
- parameters related to regulation type
- antifreeze temperature
- setting of an external supporting input
- selection of the control probe
- keypad lock by password
- system operation hours.
To enter the menu ADV:
1. From the normal operation display, press the key for a long time until the
symbol starts flashing on field (2).
2. Press the key for a short time until the symbol starts flashing and press
the key to enter the parameters modification.
3. Now the first parameter of the menu starts flashing:
press the keys and to modify the parameter and the key to
confirm and move to the next parameter.
To exit the parameters modification press the key .

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CHRONOS KEY Programmable Thermostat User Manual
Operating mode
This parameter allows to specify the operating mode of the programmable thermostat,
between winter-heating mode ( ) and summer-cooling mode ( ).
For further information about the operating mode see the chapter “Regulation
types” on page 27.
Regulation type (only for heating mode)
For heating mode it is possible to choose between on/off (Reg 0) or proportional
(rEg P) regulation.
For further information about regulation type see the chapter “Regulation
types” on page 27.
Regulation parameters
In case of on/off regulation the only parameter to set is the hysteresis (dIF), which
can have values between 0.1°C and 1°C.

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CHRONOS KEY Programmable Thermostat User Manual
In case of proportional regulation the parameters to set are the regulation band (bnd)
and the regulation time (PEr).
For further information about how to choose these values see the chapter
“Regulation types” on page 27.
Remember that the preset settings are suitable for the most part of the
situations: to change these settings only if it is really necessary.
Antifreeze temperature (only for heating mode)
For the heating mode it is possible to set a safety temperature (antifreeze temperature
0ff) to maintain also if the programmable
thermostat is switched off.
It is possible to choose a value between 1°C
and 10°C. It is also possible to deactivate the
antifreeze function pressing the key until
the display shows “_-.-”. In this case, no safety
temperature is maintained, if the programmable
thermostat is switched off.
External supporting input settings (only for battery powered models)
The programmable thermostat allows to connect a remote external temperature probe
to display (otherwise also to regulate) the measured temperature where the probe is
placed in or to connect a voltage free contact to the telephone activator connection in
order to switch on/off the remote programmable thermostat.
Field will display the writing ESt and the selected option will flash. Choose:
- (to connect an external temperature probe
- DIG to connect a telephone activator.
The characteristics of the probe are the following:
• Degree of protection: IP66
• Cable length: 2 meters (extensible up to 40 meters with a bipolar cable min section
1 mm2)
• Operating temperature: -40 °C ÷ +60 °C
Code Model Capacity
VN883500 X.Temp -40 °C ÷ +60 °C
For further information about how to choose these values see the chapter
“Regulation types” on page 27.
Remember that the preset settings are suitable for the most part of the
situations: to change these settings only if it is really necessary.