Digital
Chronothermostat
Mithos Wi-Fi
User Manual
Index
■ Dimensions Page 3
■ Connection diagram Page 3
■ Safety warnings Page 4
■ Technical characteristics Page 4
■ Control elements / display indications Page 6
■ Installation Page 8
■ Initial start-up of the Mithos Wi-Fi Page 9
The app Page 13
Off-line operation of Mithos Wi-Fi Page 21
■ Clock setting Page 22
■ Programs setting Page 24
■ Temperatures setting Page 26
■ Manual operation Page 27
■ Summer / winter operation Page 28
■ Programmable thermostat deactivation Page 29
■ Timings Page 29
■ Advanced programming Page 31
■ Advanced functions Page 37
■ Regulation type Page 39
■ Reference standards Page 40
■ Winter programs Page 41
■ Summer programs Page 42
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Mithos Wi-Fi Digital Programmable thermostat
• Comfort and control of
consumptions are ensured both in
winter and in summer (heating/air
conditioning)
• Power supply: 230 Vac
(with backup battery)
• Wall-mounting or coverage of the
503 box (3 modules)
• Remote control through app for iOS
systems and Android or from PC
• All programming occurs remotely
through app or via internet with pc/
mac
• Weekly programming with
7 different customizable programs
and 3 temperature levels
Profile of a program
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T3
T2
T1
132
36
95
36
DIMENSIONS
CONNECTION DIAGRAM
230V ~
L
1
N
2
COM
3
NC
4
NO
5
Input for
X.Temp or DIG
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6
7
■ The Mithos Wi-Fi is an electronic weekly programmable thermostat with wi-fi
connection to manage your heating/cooling system.
The integrated wi-fi module allows to connect the Mithos Wi-Fi to home router and so
to internet. Once connected, it’s possible to program the Mithos Wi-Fi also when you
are out of your home through app (available for iOS-Apple systems and Android) or via
internet from pc/mac.
Code Model Description
VE612800 Mithos Wi-Fi Bianco White wi-fi weekly programmable thermostat
VE705000 Mithos Wi-Fi Nero Black wi-fi weekly programmable thermostat
VE323200 FR.Mithos Silver painted front panel
SAFETY WARNINGS
■ During installation and operation of the product, it is necessary to comply
with the following instructions:
1) The instrument must be installed by a skilled person, in strict compliance with
the connection diagrams.
2) Do not power on 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 instrument must be installed and activated in compliance with current
electric systems 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 protection device from the overcurrents must be present
TECHNICAL CHARACTERISTICS
• Power supply: 230 V AC ( -15% ÷+10%) 50/60Hz
• Charge reserve: 1 hour about thanks to the backup battery
• Backup battery: rechargeable AA NiMH type, capacity 2000 mAh or higher
Use rechargeable NiMH batteries only
• Auxiliary configurable input to whom to connect alternatively:
– a not powered contact (DIG)
– an external temperature probe X.Temp
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• Output:
– bistable relay with change-over contact 8A / 250 V AC
• Type of action: 1B
• 5 temperature settings:
- T3, T2, T1 for automatic regulation
- T0 antifreeze temperature settable in advanced programming
- T
temperature in manual operation
• Temperature regulation:
- ON/OFF with differential settable between 0.1°C and 1°C
- PROPORTIONAL with settable proportional band and regulation period
• Weekly programming
• Daily resolution: 1h
• Activation delay settable between 15, 30 or 45 minutes (independent for each hour)
• Measured temperature scale:
– 0°C ÷ +50°C (internal probe)
– -40°C ÷ +60°C (external probe)
• Measured and displayed temperature resolution: 0.1°C
• Temperature regulation range: 2.0°C ÷ +35°C
• Measurement update: every 20 seconds
• Measurement precision: ± 0.5°C
• Heating (winter) or cooling (summer) operation
• Automatic change CET / DST
• Password protected keypad lock for installation in public places
• Wall mounting (or on 503 type box)
• Terminal strips:
- Output: 3 poles 1.5 mm
- Input: 2 poles 1.5 mm
2 poles 1.5 mm
2
for bistable relay
2
for external probe or digital input
2
for power supply connection
• Operating temperature: 0 °C ÷ +50 °C
• Operating humidity: 20% ÷ 90% noncondensing
• Storage temperature -10°C ÷ +65°C
• Degree of protection: IPXXD
The preset temperature values (expressed in °C) are the following:
T1 5.0 OFF
T2 15.0 23.0
T3 18.0 25.0
MANUAL 20.0 24.0
T
funct. winter funct. summer
Regulation of temperature levels is subjected to the following condition: T1 ≤ T2 ≤T3.
In summer mode, T1 cannot be set and corresponds to the air conditioning OFF.
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CONTROL ELEMENTS / DISPLAY INDICATIONS
12
➔
11
➔9➔
➔
➔5➔
■ Control elements
1) “ ” Key: manual operation
” Key: increases the selected field or displays the daily maximum
2) “
” Key: decreases the selected field or displays the daily minimum
3) “
” Key: confirms the set data
4) “
” Key: activation and deactivation of the programmable thermostat
5) “
” Key: selects temperature T3
6) “
” Key: selects temperature T2
7) “
” Key: selects temperature T1
8) “
” Key: allows to set a timer or an activation delay
9) “
10) “
11) “
12) “
13) “
” Key: programs setting or advanced programming
” Key: clock setting
” Key: winter operation (preset) or summer operation (the key is reachable
” Key: instrument reset (according to the type of reset it’s followed by the
2
10
temperature
temperature
only with a point)
press of another key)
(the key is reachable only with a point)
1
13
➔
➔8➔
➔
➔
3
➔4➔
7
6
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■ Display indications
14
22
20
26
21
16
14) “Day”
Field
15) “External temperature”
Field
16) “Environment temperature”
17) “Set program”
Field
18) “Manual operation activation”
19) “Timings”
Field
20) “Air conditioning activation”
21) “Heating activation”
22) “Clock”
Field
23) “Data in progress updatel”
24) “Connection to internet on”
25) “Unit of measurement”
26) “Off”
Field
Field
Field
Field
(°C only) Field
Field
Field
Field
24 19
15
23
18
25
17
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INSTALLATION
• Extract the instrument from the box
and fasten it to wall using the provided
screws. Place it at about 150 cm from the
floor at a point of the room that reflects
the average conditions of the whole
environment, or away from doors or
windows, from heat sources away from
direct radiation.
• Insert the rechargeable battery and make
the connections respecting the diagram
on page 3.
• Power the instrument.
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INITIAL START-UP OF THE MITHOS Wi-Fi
The necessary procedure to prepare the Mithos Wi-Fi to remote operation consists of three
steps, described below.
1. MITHOS Wi-Fi CONNECTION TO INTERNET
1.1. Press the key “R” and immediately after (within 3 seconds) the key “
The display is as follows:
1.2. Wait for the icons and stop flashing and become
fixed lit (after about one minute)
1.3.
With the help of a smartphone (or pc or mac) equipped with
Wi-Fi connection, start the search of Wi-Fi networks and connect to Mithos network
1.4. Access through browser (Internet Explorer, Safari, Mozilla,…) of your smartphone
the address http://192.168.1.1.
1.5. Enter the parameters of your home network and click “Configure”:
– SSID: name of your Wi-Fi network
– PSK: password of your Wi-Fi network (requested only if the box “Security” is
ticked)
”.
Data insertion of home network Confirmation answer sent by Mithos
1.6. Press the key “R”. The icon
flashing and becomes fixed lit (simultaneously the icon
flashes: wait about 20 seconds until it stops
starts flashing).
At this point the Mithos Wi-Fi is connected to internet.
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2. CREATION OF YOUR ACCOUNT
After connecting the Mithos Wi-Fi to internet it’s necessary to create a personal account
to which to associate all Mithos Wi-Fi that you want to control.
2.1. Access the store of your smartphone/tablet, install and start the free app
Vemer-Mithos Wi-Fi
2.2. Choose “Register” to create a new account
2.3. Fill in the fields and confirm. The system sends an email to the specified address
with the link to confirm the activation of the account.
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3. ASSOCIATION MITHOS / ACCOUNT
The last phase expects to associate the Mithos Wi-Fi to the created account.
3.1. Go to the page of PIN configuration of Mithos Wi-Fi (see “What is the pin” on
page 12).
3.2. Start the app, enter the username (email address) and password chosen during
registration phase and press “Access”
3.3. Press “Add Thermostat” to add a new Mithos Wi-Fi.
Enter the following data and press “Save”:
– Serial (PIN)
– A name which identifies the Mithos Wi-Fi (enter a name you like.
For example: if it is a Mithos Wi-Fi installed in office, a possible name could be
“Mithos Office”)
– An image which will appear as background during the use of the app
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What is PIN
The serial (PIN) is a number of 4 digits generated automatically by Mithos Wi-Fi.
To view it:
– press the key “PRG” for at least 3 seconds to access the menu or advanced
programming
– press several times the key “
” until reaching the page of PIN
3 s
d1f 0ff adj Est Sns
The start-up is complete. From now on the icon
is connected to internet while the icon
is on to indicate that Mithos Wi-Fi
lights up only during the data exchange
between Mithos Wi-Fi and app (usually once a minute).
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THE APP
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The APP Mithos Wi-Fi allows you to control remotely and in a simple way your chronothermostat Mithos Wi-Fi.
Page “Login”
Access using the access credentials (email,
password) chosen during registration phase of your
account (see on page 10).
Page “Mithos List”
From this screen it’s possible to choose which
Mithos Wi-Fi to control.
Wi-Fi to control.
: allows you to record a new Mithos
: allows you to group several
Mithos Wi-Fi in the same directory (for example it’s
possible to group several Mithos Wi-Fi in a building
of 3 floors according to the logic “Floor 1”, “Floor
2” and “Floor 3”).
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Main Page
This screen shows the status of Mithos Wi-Fi:
temperature (18.9°C) by the internal probe (INT), of
: indication of the measured
the operating mode (HEATING) and of the status of
the heating system
(flame red = heating on,
flame grey = heating off).
: operating mode.
Touch to change the operation (heating or cooling)
and the mode (automatic, manual or off).
: setpoint currently programmed and
name of the running program.
Touch to change the running program.
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Programs list
From the screen “Programs list” it’s possible:
: to create a new program
: to select, to modify, to delete or to rename
an existing program
Note: the padlock next to the program WINTER
DEFAULT indicates that the program can not be
modified or deleted.
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Modify a program
To modify an existing program, select the day to be modified. On the screen that opens,
assign at any time of day one of the three available temperature levels (marked by
blue, green and red colours).
Created a program for a day, it’ s possible to copy it to any other day of the week
(“Copy” function).
Note: the image refers to the version of the app for smartphone.
On the tablet the whole weekly programming is visible on a single screen.
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MENU
Touch the symbol
Mithos settings
in the upper right to access the advanced menu.
From this screen it’s possible:
- to change the name of the Mithos Wi-Fi
- to change the image that identifies it
- to change the temperature values for automatic
operation
- to modify advanced settings
(alarm setting, temperature regulation mode,
input configuration).
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Set a holiday period
Set vacation days in which the regulation is turned
off by selecting them on the calendar.
operation filed shows VAC
During the holiday period the
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OFF-LINE OPERATION OF MITHOS Wi-Fi
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The Mithos Wi-Fi can be off-line and operates like a normal Mithos not Wi-Fi.
In this mode all settings performed remotely through app are ignored; only the
programming made with the keyboard of Mithos Wi-Fi is taken into consideration.
To put off-line the Mithos Wi-Fi:
- press the key “PRG” for at least 3 seconds to access the
advanced programming
- press several times the key “
” until to reach
the page of PIN
- press the key “
- exit the menu by pressing several times the key “
”. The display shows LOC
”.
Note: in off-line mode, the icons
and are still lit.
The Mithos Wi-Fi can be put on-line again from keyboard (following the previous procedure)
both via app (when a programming is made from app the user will be asked if he wants to
put the Mithos on-line again).
CLOCK SETTING
• Press the “ ” key; on field (16) seconds
will run flashing, while field (22) will
display digits of minutes and hours.
Press the “
increase the minute field by 1 or “
reset the seconds field.
Press the “
(In case the setting of the clock takes
place after a reset, the “seconds” field
is not adjustable. Therefore, the first
parameter to set will be the "minutes"
field).
” key to reset seconds and
” to
” key to confirm.
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At this point, the minutes digits will start flashing.
Use the “
” and “ ” keys to increase or decrease the field and press “ ” to
confirm.
Repeat the procedure to set the hours.
Once the value for the hours is set, field (22) will display a flashing value of the year,
field (15) the value of the month and field (16) the value of the day.
Press the “
Once the day is set, press the “
” and “ ” keys to modify the values and “ ” to confirm.
” key to exit the menu.
Upon exiting such procedure the clock indication will not flash any more; field (16) will
display the environment temperature again, while, if the external probe is connected,
field (15) will display the external temperature.
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PROGRAMS SETTING
• Pressing the “PRG” key on field (14) will
display the indication regarding Monday,
field (16) will display the selected program
flashing (in the example: P1), field (15) will
display "Pro", field (17) will display the
graphic trend of the corresponding program
and will activate symbol (20) or (21)
depending on the set operation (summer or
winter).
If the selected program is correct, press the
“
” key to continue to the next day.
• If the selected program is not correct for
that day, you can create another one using
the “
” and “ ” keys which modify
value “Px” contained in field (16); as the
program changes, so does the content of
field (17) regarding the selected program.
The default programs are listed at the end
of this manual.
Once the correct program is selected, press
the “
” key to move on to the next day.
If no program satisfies the user's needs,
•
choose any program and press the
key again; this will bring the segment of
the corresponding field
(17)
“PRG”
to flash.
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With the T1,
T2
and
T3
keys, it is possible
to modify the temperature selected for
that hour and, at the same time, move on
to the next one. Using the
“ ”
keys, it is possible to move from
“ ” and
one hour to the next without modifying
the set temperature.
Pressing the
“ ”
key, it is possible to set
the activation delay for that specific hour.
Each pressure of the
“ ”
key increases
the delay by 15 minutes.
“ ”
Pressing the
key confirms the
modified program and returns to the
situation with
Pressing the
“Px”
flashing on field
“ ”
key confirms the
program for that day and moves on to the
next until Sunday appears, after which
operation goes back to normal mode.
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(16)
.
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TEMPERATURES SETTING
•
In any of the operation modes, pressing
the
T1, T2
and
T3
to display the writing corresponding to the
temperature that is being modified; on
field
(16)
temperature will flash.
keys will bring field
the value of the aforementioned
(22)
With the
“ ” and “ ”
keys, it is
possible to modify the value and with
the
“ ”
key it is possible to confirm the
change and return to normal operation.
The setting limits are reported in the
technical characteristics.
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MANUAL OPERATION
•
During automatic operation, when pressing the
normal thermostat with operating temperature Tm.
Field
(22)
Field
Field
The symbol
Field
With the
Pressing the
At any time, it is possible to verify the
will show the current time.
(14)
will show the current date.
(15)
will display the writing
(18)
will appear.
(17)
will disappear. On field
“SEt”
(16)
.
the
set manual temperature value will flash.
“ ” and “ ”
keys, it is
possible to change the value from 2.0°C
to 35°C.
“ ”
from the last operation, field
key or after 45 seconds
(16)
will
display the value of the environment
temperature, while field
(15)
will display
the external temperature value (if probe is
connected).
set temperature pressing the
or the
“ ”
key; pressing one of the 2
“ ”
key
keys again will allow modification of the
temperature setting. To move from the
manual program to the automatic one,
simply press the
least 3 seconds.
”
“
key again for at
“ ”
key, the system will act as a
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SUMMER / WINTER OPERATION
To move from winter to summer operation
(or vice versa), press the "
point (12).
On field (22) the writing “rISC” (or
“Cond”) will flash and the symbol
“ ”
(or
“ ”
) will appear.
" key with a
With the
“ ”
and
“ ”
keys, it
is possible to select one of the two
operations.
The program will go to the desired
operation pressing the
“ ”
key or after
45 seconds from the last operation.
The potential of the summer operation
is the same as the one of the winter
operation; therefore the setting of
all parameters can be carried out
following the procedures reported in this
instructions manual.
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PROGRAMMABLE THERMOSTAT DEACTIVATION
•
To deactivate the programmable
thermostat press the
The display will show the
Once deactivated, during winter
operation the programmable thermostat
will activate the antifreeze function to
ensure that the temperature does not
decrease below a certain threshold.
Such temperature value is set in
advanced programming (see "Antifreeze
temperature" page 33)
During summer operation, instead, the
deactivated system condition completely
excludes the refrigeration command.
To go back to the operating mode prior to the deactivation, press the
again.
“ ”
key.
“ ”
symbol.
" "
key
TIMINGS
The programmable thermostat allows to activate three different timed operation
modes, useful when you want to maintain a certain condition for some hours/days.
The three timed operations are:
Manual operation
If in manual status you set a timing, such manual status will be maintained until
the end of the timing; operation will then switch to automatic. If, during the timing,
operation is switched to automatic or off, the timing ends.
Automatic operation
If in automatic status you set a timing, such automatic status will be maintained until
the end of the timing; operation will then switch to automatic. If, during the timing,
operation is switched to manual or off, the timing ends.
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Timed deactivation
If in off status you set a timing, such off status will be maintained until the end of
the timing; operation will then switch to the one active before deactivation. If, during
timing, the system is activated, the timing ends.
In all cases, the timing condition is signalled by the symbol “
”.
Setting a timing
To activate timing it is necessary to press
the
“ ” key
The writing “00h”
timing. With the
will flash, indicating the
“ ”
and
“ ”
keys it is
possible to choose a value between 0 and
99. Pressing the “
” key will allow to
choose the measurement unit between hours
and days.
Each change in measurement unit implies a
resetting of the set timing value.
Once the value has been set, press
“ ”
to
confirm or wait 45 seconds.
Note. In case time is modified during timing, it will not be updated.
Note. In the hour count, the hour in which programming is carried out is
included. In the same way, if the measurement unit is in days, the count
also includes the current one. Timings in hours terminate after end of
the hour, the ones in days at midnight.
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ADVANCED PROGRAMMING
• In advanced programming it is possible to access the following operation
parameters:
-
regulation type
-
parameters for regulation type
-
antifreeze temperature
- page
temperature correction
-
external probe presence
-
regulation probe selection
- PIN for Wi-Fi connection
-
keypad lock password
-
system operation hours
• To enter advanced programming, press
the “PRG” key for more than 3 seconds.
The parameter to be modified will flash;
using
“ ”
and
“ ”
modify its value. Use
the setting and move on to the next parameter. Once the last parameter has been
confirmed, you will exit the menu and the programmable thermostat will restore
operation with the previously set operation.
Regulation type (only for winter operation)
• Field (22) will display the writing “rEG=”
and on field (16) letter “O” (ON-OFF
programming) or “P” (proportional
programming) will flash.
it is possible to
“ ”
to confirm
• Using the
“ ”
and
“ ”
keys, choose
the desired regulation mode and press
“ ”
to confirm and move to the setting
of the next parameter.
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Parameters for the chosen regulation type (only for winter operation)
• In case of “ON/OFF” regulation type,
the only parameter to be set is the
differential. Field (22) will display the
writing “dIF=” and on field (16) the
value currently set will flash. Press the
“ ”
and
“ ”
keys to increase or
decrease the value. The range varies from
0.1°C to 1°C.
• In case of
PROPORTIONAL
regulation
type, the parameters to be set are:
-
regulation band
-
regulation period
(22
Field
) will display the writing
and on field
will flash. Press the
(16)
the value currently set
“ ”
and
“ ”
“bnd=”
keys
to increase or decrease the value. The
range varies from 0.5°C to 5°C.
Once the band value is confirmed, field
(22)
will display the writing
on field
(16)
flash. Press the
the value currently set will
“ ”
and
“PEr=”
“ ”
and
keys
to increase or decrease the value. It is
possible to choose between 10, 20 or 30
minutes.
For a wider description on how to operate
the regulation type choice, please refer to
the chapter “REGULATION TYPE” on page
39.
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Antifreeze temperature
(only for winter operation)
• It is possible to set a safety temperature value (antifreeze temperature) to be
maintained in case the programmable thermostat is deactivated.
Field
(22)
will display the writing
“OFF=”
and on field
(16)
the antifreeze
temperature value currently set will flash.
Press the
“ ”
and
“ ”
keys to
increase or decrease the temperature
value. It is possible to choose a value
between 01.0°C and 10.0°C.
It is also possible to disable the antifreeze
function holding the
(16)
displays the symbol
“ ”
key until field
“---”
. In this
case, when the programmable thermostat
is off, no regulation is executed.
Page temperature correction
Using this parameter to make a correction
to the temperature value measured by the
probe.
The set value is added or subtracted to
the temperature measured.
Values range from -5.0°C to +5.0°C
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External auxiliary input configuration
The programmable thermostat allows to connect a remote external temperature
probe to display (or eventually to adjust) the measured temperature where the
probe is installed or a not powered contact if you want to connect an external
auxiliary device (for example a gas detector, an anti-theft system, a system of boiler
block detection,…).
On field
(22) “ESt=”
field
(16)
the chosen option. Choose
appears and on
“°C” if you want to connect an external
temperature probe or “dIG” if you want
to connect an auxiliary device.
If you choose “°C” when you exit the
menu, on field
(15)
appears
“EXT”
followed by the value of temperature
measured by the probe.
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 mm
2
)
• Operating temperature: -40 °C ÷ +60 °C
Code Model Capacity
VN883500 X.Temp -40 °C ÷ +60 °C
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Choosing the regulation probe
In case an external probe is present, it is possible to choose whether to use
the internal probe or the external one as a regulation sensor.
Field
(22)
will display the writing
“SnS=”
and on field
(16)
the value
currently set will flash.
Using the
“ ”
and
“ ”
choose
“Int”
if you want to use the
internal probe or
“Est”
keys,
if you want to
use the external probe and press
“ ”
to confirm the choice.
Serial (PIN)
This menu shows the pin code necessary in phase of start-up to associate the
Mithos Wi-Fi to your account.
From here, it’s possible to put the Mithos Wi-Fi in off-line mode or cancel the Mithos
Wi-Fi from your account.
To put the Mithos Wi-Fi in off-line mode,
press the key
“ ”
. The display shows
LOC
To cancel the Mithos Wi-Fi from your
account press the key “PRG”. The display
shows DELETE.
Pressing the keys
“ ”
or
“ ”
the mac
address of Mithos Wi-Fi is showed and
the power of the signal (between router
and Mithos Wi-Fi) expressed in Db.
Mithos Wi-fi Chronothermostat User Manual
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Keypad lock password
It is possible to choose a three digits value to be used to unlock the keypad.
Field (22) will display the writing “PAS=”
and on field (16) the password value
currently set will flash (the default set
value is “123”). Using the
“ ”
keys, choose a desired value and
press
“ ”
to confirm.
“ ”
and
To enable/disable the keypad lock,
please refer to the chapter “ADVANCED
FUNCTIONS”.
System operation hours
It is possible to display the system operation hours (relay in ON status).
Field (15) displays the writing “tot=”
while fields (22) and (16) will display
the timing value (such value is of 5 digits,
3 on field (22) and 2 on field (16) and
it is to be read from left to right. In the
example the value is of 1274 hours).
Two independent totalizers for winter
and summer operation are present. The
maximum memorizable value is of 65535
hours. To reset the counter, press the
“
” key for about 3 seconds when you
are in the counter view menu.
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ADVANCED FUNCTIONS
Automatic change CET / DST
The programmable thermostat allows to
automatically move from the CET (Central
European Time) to DST (Daylight Saving
Time) and vice versa.
Holding the “
seconds, the display will show the writing
“Change” and field (15) will flash the
writing “On” or “OFF”.
Choose using the
confirm with
If the choice is OFF, you will exit the menu
and the programmable thermostat will
not execute the hour change. If the choice
is ON, then two other menus will be displayed, which define respectively the hour
change from
-
winter summer
-
summer winter (on field (20) the
To modify the set values, press the
“PRG” key. The parameter corresponding
to the modification will start flashing.
Press the
the values and
The settings for both menus are, in order:
-
week of the month
(1ST first, 2ND second, 3RD third,
4TH fourth, LST last)
-
day of the week
-
month
-
changing hour
At the end of each menu, press the
the next menu or to exit and return to the normal view.
The default values set for the automatic time change are:
-
winter summer change: last Sunday of March at 02:00
-
summer winter change: last Sunday of October at 03:00
” key for at least 3
“ ”
“ ”
.
“ ”
and
“ ”
or
“ ”
keys and
“ ”
“ ”
keys to modify
to confirm.
“ ”
Mithos Wi-fi Chronothermostat User Manual
- 37 -
symbol will appear)
key again to access
Keypad lock
In case you want to install the
programmable thermostat in public
environments, it is possible to lock the
keypad simply by simultaneously holding
the
T1, T2
and T3 keys for 3 seconds. The
display will show the writing “BLOC”.
To unlock the keypad, press the
and
T3
keys again for 3 seconds and
input, using the
“ ”
and
“ ”
T1, T2
keys, the
protection password.
Display of max/min daily temperature
The programmable thermostat memorizes
the minimum and maximum temperature
values measured both from the internal
probe as well as from the external one
during the day. To view such values press
the
“ ”
key (maximum value) or
“ ”
(minimum value). Field (15) will
display the value relevant to the external
probe while field (16) will display the
value relevant to the internal one.
To reset the minimum/maximum value
memorized, press the
“ ”/“ ”
key for
at least 3 seconds.
Mithos Wi-fi Chronothermostat User Manual
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Emergency regulation
During winter operation, in case of sensor failure, in order to avoid problems
regarding freezing, the programmable thermostat activates the relay for 10 minutes
every 4 hours and field (16) will display the “---” symbol.
Restoring default parameters
Simply pressing the “R” key will not cause a total reset of the instrument. To do so
and allow the loading of the default values, it is necessary to press the “R” key and
then, within 3 seconds, the
“ ”
key. The display will show the writing “dEF”.
REGULATION TYPE
The default regulation type is ON/OFF with deactivation in correspondence
with the setpoint and with differential set to 0.3°C.
During on/off operation mode, the output relay follows the following logic:
heating mode cooling mode
relay ON
relay OFF
Temperature
increasing
SET-DIFF SET
During heating mode the proportional regulation can be chosen; in certain types
of systems, this allows to improve the regulation, in order to obtain a constant
temperature.
This regulation activates the ON or OFF relay within a predefined regulation cycle on
the basis of the gap of the temperature measured by the setpoint value.
The necessary parameters for the definition of this mode are:
• the regulation band
• the regulation period
The regulation band represents the temperature interval, centered on the setpoint, in
which the proportional regulation is checked.
relay ON
relay OFF
Temperature
increasing
SET+DIFFSET
Mithos Wi-fi Chronothermostat User Manual
- 39 -
Half the desired regulation band is set in the device.
The range for this parameter is 0.5 ÷ 5.0°C with 0.1°C resolution
The regulation period represents the duration of the regulation cycle (activation period
+ deactivation period)
The value of this parameter is selectable between 10', 20' and 30'
Choose the regulation period value as follows:
• 10' for low thermal inertia systems
• 20' for medium thermal inertia systems
• 30' for high thermal inertia systems
Choose the regulation band value as follows:
• broad band (5°C) for systems with high thermal gradient
• narrow band (0.5°C) for systems with low thermal gradient
REFERENCE STANDARDS
Compliance with Community Directives
2014/35/EU (LVD)
2014/30/EU (EMCD)
2014/53/EU (RED)
is declared with reference to the following harmonized standards:
EN 60730-2-7 (LVD)
EN 60730-2-9 (LVD)
ETSI EN 300 328 (R&TTE)
ETSI EN 301 489-1 (EMC-R&TTE)
ETSI EN 301 489-17 (EMC-R&TTE)
Mithos Wi-fi Chronothermostat User Manual
- 40 -
WINTER PROGRAMSWINTER PROGRAMS
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P1
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P2
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P4
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P5
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P6
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
T2
P7
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
■ ■ ■ ■ ■ ■ ■
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
■ ■ ■ ■ ■ ■ ■ ■ ■
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
■ ■ ■ ■ ■ ■ ■ ■ ■ ■
Mithos Wi-fi Chronothermostat User Manual
- 41 -
SUMMER PROGRAMS
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P1
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
■ ■ ■ ■ ■ ■ ■ ■ ■
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P2
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P4
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P5
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
T2
P6
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
T3
T2
P7
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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
Mithos Wi-fi Chronothermostat User Manual
- 42 -
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
V3ISO0782-011
06-2016
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