Fantini Cosmi CH121 User manual

FLUSH MOUNTING ROOM THERMOSTAT
CH121
cover plate not included

2
The CH121 chronothermostat must be installed in a 3-module recessed box, in the
middle of the apartment, preferably 1.5 m off the ground. The required components,
all included in the package, are used based on the plates available, according to the
following table.
* N.B. COVER A available colours: white, silver and black;
COVER B available colours: white, silver and black, for Bticino Matix white only.
COMPATIBLE PLATES COVER*
TYPE
FRAME
TYPE
SIDE ADAPT-
ERS * TABS TO DETACH
Bticino Living International and
Transizione Piana B 1 NO NO
Bticino Living Light Air B 3 NO YES position “A+C”
Bticino Light, Light tech B 1 NO NO
Bticino Axolute A 1 NO NO
Bticino Matix B 2 SI (dedicated) YES position “A”
Vimar Idea and Rondò B 2 YES YES position “B”
Vimar Plana and Eikon B 1 NO NO
Vimar Eikon Evo A 3 NO YES position “A”
Vimar Arké A 3 NO NO
Gewiss Chorus One, Lux, Art B 2 NO YES position “A”
Ave sistema 45: Zama, Banquise,
Yes, Ral B 2 YES NO
Ave sistema 44: Zama, Personal,
Technopolymer A 1 NO NO
Legrand Cross, Vela square, Vela
round B 2 NO YES position “A”
INSTALLATION
1
CONTENTS OF PACKAGE
1 thermostat
3 frames
3 coloured covers, type A
3 coloured covers, type B
3 pairs of adapters
1 pair of special adapters for Bticino Matix
2 screws
1 user manual

CH121
3
PERFORM THE FOLLOWING OPERATIONS:
1. act on the master switch on the electric panel to cut power to the electrical system;
2. when required, detach the tabs according to the type of plate;
3. when required, mount the side adapters;
4. fasten the chronothermostat to the suitable frame;
5. mount the cover on the body of the chronothermostat;
6. connect the two wires of the boiler to terminals 1-2 of CH121;
7. screw the frame onto the box using the provided screws;
8. mount the plate;
9. switch the electric system back on.
cut 4 tabs
according to type of cover plate
frame
frame
frame
“B”
“A”
“A”
“C”
cut 4 or 8 tabs
according to type of cover plate

4
ELECTRICAL CONNECTIONS
2
ATTENTION: installation must be carried out by qualified
personnel
!
PLEASE NOTE: when CH121
is disconnected, the boiler
contactremainsinitscurrent
position.
Boiler

CH121
5
INSERTION AND REPLACEMENT OF BATTERIES
InserttwoAAA1.5Valkalinelonglasting batteries,ofagoodbrand,payingattentionto
the marked polarities.
N.B. the life of the batteries is greatly affected by the type of use and the settings made
by the user, especially the set back lighting switch-on time.
When the batteries are low, the symbol of the discharged battery flashes on the
display: . CH121 keeps working regularly, but the display does not light up.
If the batteries are completely discharged, the chronothermostat quits working,
switching off the system and disabling the keys. “OFF” together with the symbol of
the discharged batteries appear on the display until they are replaced.
Toreplacethebatteries,removeCH121fromitshousing,moderatelypressinginwards
and at the same time on both sides of the cover.
All parameters remain stored while the batteries are being replaced.
COMFORT / TMAX
ECONOMY / TMIN
OFF ANTIFREEZE
QUICK GUIDE FOR PROGRAMMING
4
DESCRIPTION OF KEYS AND DISPLAY
The thermostat is equipped with 4 keys, the function of which varies depending on
the situation. It is described by the symbol which appears on the display next to the
key.
winter relay ON
summer relay ON
room temperature
Celsius / Fahrenheit
summer/winter
4 function keys reset
function
3

6
OPERATION
5
Operating mode selection
ECONOMY / TMIN
COMFORT / TMAX
OFF ANTIFREEZE
Temperature
adjustment keys
ECONOMY / TMIN 2 ÷ 40 °C
COMFORT / TMAX 2 ÷ 40 °C
OFF ANTIFREEZE 0 ÷ 7 °C
SUMMER or WINTER selection
Press to set
COMFORT / TMAX mode
Press to set
ECONOMY / TMIN mode
ANTIFREEZE temperature cannot be set in summer mode.
Press to set
OFF ANTIFREEZE mode
CUSTOMISE THE TEMPERATURE
When you have set the operating mode press the two keys (increase
or decrease ) to set the temperature:
ECONOMY / TMIN 2 ÷ 40 °C
COMFORT / TMAX 2 ÷ 40 °C
OFF ANTIFREEZE 0 ÷ 7 °C

CH121
7
Press both keys simultaneously to select SUMMER (cooling) or WINTER (heating) mode.
You may choose the time during
which back lighting remains on:
OFF →always off
1sec …….. 10sec
Press together, and keep pressed,
to change back lighting duration.
Increase\decrease back lighting duration.
Press while keeping
summer/winter and ON/OFF keys pressed.
10 sec.
always
off
CHOICE OF BACK LIGHTING DURATION
SUMMER/WINTER SELECTION

8
ATTENTION: only qualified personnel may configure the device.
Configuring the thermostat allows you to customise the device’s operating
parameters. Perform the following steps to access the configuration program:
Using a sharp object, press the reset button while
holdingdownthe“COMFORT/ECONOMY”buttonat
the same time.
When the display reads P01, release the
“COMFORT/ECONOMY” button.
THERMOSTAT CONFIGURATION
6
1
2
COMFORT/ECONOMY
The display represents the configuration
parameters by an index: P01, P02….
Press or to scroll the parameter indexes.
Press to edit a parameter. Use and to
change the value of the parameter. Press again
to go back to the parameter index.
To exit parameter configuration, press or until the display reads “END”. Press
.
reset
enter

CH121
9
Index Parameter Default Values
P01 display mode 1 1 = view room temp
2 = view set point
P02 correction of displayed tem-
perature value
0.0°C +/- 4°C (step 0.1°C)
P03 winter lower limit set point
temperature
2.0°C 2.0°C……40.0°C (step 1.0°C)
P04 winter upper limit set point
temperature
40.0°C 2.0°C……40.0°C (step 1.0°C)
P05 summer lower limit set point
temperature
2.0°C 2.0°C……40.0°C (step 1.0°C)
P06 summer upper limit set point
temperature
40.0°C 2.0°C……40.0°C (step 1.0°C)
P07 differential adjustment 0.3°C ±0.3°C…….±2.0°C *
(step 0.1°C)
P08 temperature scale CEL CEL = Celsius
FAH = Fahrenheit
END exit parameter configuration
and store values
* ± 0.3°C value suited for plants with slow thermal inertia,
± 2°C value suited for very reactivate plants.

10
TECHNICAL FEATURES
7
Power supply 2 AAA 1.5V batteries
Battery duration approximately 1 year *
Contact range 5(3)A 250V~
voltage-free switching
Maximum room temperature T45 °C
Temperature adjustment scale 2 ÷ 40 °C, increase 0.1°C
Measurement scale/room T display -40 ÷ 50 °C
Type of action micro disconnection1B
Degree of protection IP20
Pollution degree 2
Pulse voltage 4000V
Electric insulation
Software Class A
Thermal gradient of reference 4K/h
Assembly recessed in 3-module box type 503, with 2
screws
Dimensions 68 x 52.2 x 58 mm
Product not made in Italy
Compliance with standards EN 60730-1 and second parts
ErP classification ErPClassIV;2%(Reg.EU811/2013-813/2013)
* N.B. the life of the batteries is greatly affected by the type of use and the
settings made by the user, especially the set back lighting switch-on time.