Imit Duo Plus User manual
SUMMARY
1. Introduction pag. 3
2. Technical data 4
3. Display readings key 6
4. Thermostat controls key 7
5. Dimensions 8
6. Installation and connections 9
7. Thermostat start-up 15
8. Clock setting 15
9. Program setting 17
10. Temperature setting 18
11. Normal operation conditions 19
12. Override mode 19
13. Summer/winter setting 20
14. Knob lock 21
15. Unit reset 21
16. Troubleshooting 22
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1. INTRODUCTION
Thank you for your confidence in our company and for choosing our products.
This is an easy programming, high-styling design, 24-HOUR electronic THERMOSTAT. It allows an extremely accurate room
temperature adjustment in the hosting room;thus meeting any users' needs as far as room COMFORT.
IN ACCORDANCEWITHTHE STANDARDS:
• EN 60730-1 and later updating
• EN 60730-2-7
• EN 60730-2-9 3
IN ACCORDANCEWITH GUIDELINES:
•B.T.73/23/EEC
•E.M.C.89/336/EEC and later updating 93/68/EEC
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2. TECHNICAL DATA
POWER SUPPLY= N°2 1.5V alkaline batteries, type LR6
NORMALTEMPERATURE RANGE“T1”= 5°÷30°C
REDUCEDTEMPERATURE RANGE“T2”= 6°C/16°C (winter mode)
23°C/26°C (summer mode)
ROOMTEMPERATURE RANGE ON DISPLAY= 0/40°C (accuracy 0.1°C)
TEMPERATURE UPDATING= once a minute
TEMPERATURE DIFFERENTIAL= 0.2÷0.4K
SENSING ELEMENT = NTC 2%
DEGREE OF PROTECTION= IP 20
OUTPUT= switching relay
CONTACTS RATING= 5(0.5)A/250V~
SWITCH ACTION= 1BU
INSTALLATION LOCATION = normal environment
MAXIMUM STANDING TEMPERATURE= 50°C
STORAGE TEMPERATURE= 0÷60°C
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ANTIFROST= 6°C fixed
PROGRAMMING= daily
PROGRAM SETTING = by micro-switches
MINIMUM PROGRAMMING RANGE= 1 hour
SOFTWARE CLASS A
SET-TEMPERATURE OVERRIDE MODE
DISPLAY LCD
WINTER/SUMMER SWITCHING (heating/ air conditioning)
UNIT RESET
KNOB LOCK
MOUNTING= to the wall
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3. DISPLAY READINGS KEY
✲
6
Operating program activated
Low batteries
function
On display: current time
and room temperature.
Summer
(air conditioning)
Winter
(heating)
Reduced
temperature “T2”
Antifrost
Proper set
confirmation
Time/temperature chart
of the activated program
Operating
system
“Override” mode
activated
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✲
4. THERMOSTAT CONTROLS KEY
7
Reset button
Knob for normal
temperature “T1”setting
Reduced
temperature “T2”
selector
Summer (
✲
) or winter ( )
mode selector
“Override”
button
Microswitches for current time
and operating program setting
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5. DIMENSIONS
8
60 mm
83,5 mm
27 mm
1,5 mm
130 mm
88 mm
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6. INSTALLATION AND CONNECTIONS
SAFETY INSTRUCTIONS
Before connecting the thermostat, make sure that the UNITTO BE CONTROLLED
(boiler, pump, air conditioning system, etc.) is NOT CONNECTED from the electrical
source.Make also sure that the power supply is the same as the one specified inside
the thermostat base (250V~ max).
PLACEMENT OFTHETHERMOSTAT
Install the thermostat away from heat sources (radiators, sunrays, kitchens) and away from doors / windows, at 1.5 mt from the
floor. 9
NO YES
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INSTALLATION
A) Open the front cover by lifting its left side
B) Remove the battery-compartment lid by pressing
along the arrow ...remove the base from the frontal part of the thermostat...
C) Remove the screw inside the battery compartment...
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...then fix it to the wall according to the installation require-
ments, as shown in the figures.
Mounting on round box.Distance
between center lines of 60 mm.
Mounting on three module buit-in std box.
Distance between center lines of 83,5 mm.
Wall mounting
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D) Connect the wires to the terminals as per wiring diagram
(see next paragraph “wiring connections”), snap the unit
back to its base and tighten it with the provided screw.
E) Insert n°2 1.5V alkaline batteries, type LR6 into
the battery compartment, making sure that the proper
polarities are maintained.
N.B.Insert the first battery into the left side of the battery
compartment and the second one into the right side of the
compartment. Finally press on the second battery so it fits
properly.
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F) Close the battery compartment by matching the two top tabs in their slots (1) and then pressing on the bottom ones (2).
BATTERY REPLACEMENT
When the display shows a blinking “”(low batteries), the thermostat will still work properly for another month, after that it
will stop working and four “EEEE”will appear on the display (battery life:1 year).
To replace batteries, follow the steps A) B) E) and F) of the previous paragraph.
WARNING:
We recommend that the batteries be replaced on the heating system start-up.
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Once the batteries are replaced, close the battery compartment lid, press the reset button (R) and reset the time as described
in chapter 8 (clock setting).
WIRING CONNECTIONS
Connect the wires of UNITTO BE CONTROLLED to terminal 1 and 2 of the thermostat (see wiring diagram).
WARNING:
We strongly recommend that, while installing the thermostat, all safety instructions and laws in force be strictly followed.
U= load
1= common contact
2= Normally Open contact
3= Normally Closed contact
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U
N
L
3
T
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7. THERMOSTAT START-UP
After inserting the batteries, thus powering the thermostat, press the reset button (R) for 2-3 seconds with a pencil point.All
the available cursors and symbols will then be displayed for a few seconds (self-test).The thermostat is then ready for CLOCK
SETTING.
NOTE:
For a PROPER use of our product, from here on all the instruction paragraphs should be read in SEQUENCE, as per
manual!
8. CLOCK SETTING
During this step, the display shows two hour-digits and two
minute-digits.The first digit on the left will blink (fig.1).
By switching down or up the micro-switches positioned under
the digits from “0to 9”, the current time is set.
The following example shows how to set 09:55 a.m.:
•Switch the micro-switch “0”to set the first digit on the display
(the second digit will blink) (fig.2).
•Switch the micro-switch “9”to set the second digit on the
display, thus completing the HOUR setting (the third digit will
(fig.1)
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blink) (fig.3).
•Switch the micro-switch “5”to set the third digit on the display
(the fourth digit will blink) (fig.4).
•Switch again the micro-switch“5”to set the fourth digit on the
display, thus completing the MINUTE setting. The current time
is now displayed.
NOTE:
- When the CLOCK SETTING procedure is completed or in
case it is not completed within 10 minutes from start-up,
the thermostat will automatically start the “OVERRIDE”
mode (shown by a blinking “F”, “T1” and the “hours/tem-
perature chart” on the display), assuring the working at
NORMAL temperature“T1”(“sun”knob) (fig.5).
(fig.2)
(fig.3)
(fig.4)
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-The CLOCK SETTING procedure may be start again at any given time by pressing the reset button (R).
9. PROGRAM SETTING
Only after the clock is set, the program can be set.
The thermostat is equipped with a series of micro-switches, with 24 little switches, one for each hour of the day.Therefore, the
program is the same for every day of the week. The setting is very simple: move up the switches (position “T1✲”) for the
amount of hours you want the temperature set with the “sun ✲”knob (NORMAL temperature).On the contrary, lower the swit-
ches (position “T2 ”), for the amount of hours you want the REDUCED temperature (selector 6°/16°C or 23°/26°C).
The set operating-program will be“graphically”displayed for an easy reading and a possible modification.
To ACTIVATE the program:
•Press the Fbutton and check if the symbol““and the reading “OK-OK”are on display (fig.6).
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(fig.5)
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10. TEMPERATURE
SETTING
•To set the NORMAL temperature “T1”, simply turn the knob
“sun ✲”until the little reference triangle on the front of the ther-
mostat points to the desired temperature on the temperature
scale.
•REDUCED temperature “T2”may be chosen between
6°C/16°C when in winter mode ( ), and between 23°C/26°C
when in summer mode (✲), using the selector on the right of
the unit (fig.7). The chosen value of the REDUCED temperature“T2”
will be on display.
(fig.6)
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11. NORMAL OPERATION CONDITIONS
During “normal operation”the room temperature is displayed for 20 seconds (indicated by °CTA), alternating with the display
of current time for 10 seconds.
The following values are displayed as well (see chapter 3):
➞The REDUCED temperature value (indicated by °CT2)
➞The operational program chart with its temperature levels T1 and T2
➞The symbol “clock”( )
➞The reading “OK-OK”.
➞The symbol “sun”(✲) or the symbol“igloo”( ) for summer or winter operation
➞The symbol “flame”( ) indicating that the boiler or the air conditioner are on.
12. OVERRIDE MODE
This function allows the OVERRIDE of the running program so that the thermostat keeps CONSTANTLY one of the two tem-
perature levels (NORMAL “T1”or REDUCED “T2”) or the ANTIFROST mode (❆), factory pre-set at 6°C.
To ACTIVATE the override mode:
•Press once the Fbutton to activate the ANTIFROST mode (6°C)
•Press twice the Fbutton to activate the REDUCED temperature “T2”(selector 6°C/16°C or 23°C/26°C)
•Press three times the Fbutton to activate the NORMAL temperature “T1”(knob“sun ✲”)
When in “override”the letter “F”, the override symbol (❆; T1 or T2) and the “hours/temperature chart”will blink on the
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display (fig.8).
NOTE:Pressing the F button when the thermostat is in
“override”at NORMAL temperature “T1”, it takes the unit
back to normal operation under the ACTIVE program, indi-
cated by the symbol “clock”( ) and by the reading “OK-
OK”on the display.
13. SUMMER/WINTER
SETTING
The thermostat can be programmed for“summer”or“winter”
operation, whether is connected to the air conditioner or to the
boiler.
•Switch the selector on the “sun”position (✲) for “summer”
mode or on the “igloo”position ( ) for “winter”mode (fig.9).
In both cases, either (✲) or ( ) will appear on the display to
show which mode is on.
(fig.8)
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