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AMMA  OT11 

 

WEEKLY PROGRAMMING DIGITAL 

CHRONOTHERMOSTAT WITH 

REMOTE BOILER CONTROL 

(OpenTherm

®

 compatible) AND REMOTE 

MANAGEMENT VIA GSM 

 

    
    

    

 

 

 

 

 

 

 

 

APPLICATION 

 

The  digital  chronothermostat 

 

FIAMMA 

 

OT11  series 

integrates  the  functions  of  room  temperature  control  and 

remote  control  of  home  heating  system  in  a  single 

interface,  specially  designed  to  make  available  all  its 

functionalities in intuitive mode. 

Control  of  the  heating  system  is  complete,  allowing  to 

manage advanced features such as solar thermal panels (if 

supported by the thermoregulation board). 

 

It  is  possible  to  choose  beetween  different  modes  of 

thermoregulation, even using an external probe (connected 

to the boiler) for climatic compensation. 

Weekly  programmation  is  particularly  versatile  because  it 

provides  4  temperature  levels  settable  and  no  restriction 

number  of  time  slots  per  day,  consisting  of  individual 

intervals equal to a quarter of an hour and can be viewed 

on the appropriate graph of the daily program. 

 

The communication between the thermostat and the control 

board  of  the  boiler  takes  place  by  means  of  a  two-wire 

cable;  the  data  are  exchanged  with  the  communication 

protocol  compatible  OpenTherm  ™  v3.0  Smart  Power 

Mode - Medium Power. 

 

 

GENERAL TECHNICAL DATA 

 

       

FIAMMA design 

 

graphic LCD 128x64 pixel 

 

backlight timer 20 seconds 

 

LED for diagnostics/signaling 

 

7 variable function keys 

 

weekly programming 

 

4 temperature levels (T0, T1, T2, T3) 

 

resolution (0,5°C temperature set) 

 

resolution (0,1°C temperature read) 

 

minimum interval programming: 15 minutes 

 

SELV insulation (Safety Extra Low Voltage) 

 

Bipolar connection, non-polarized 

 

OpenTherm™  protocol  v3.0  Smart  Power  Mode  – 

Medium Power 

 

serial  interface  RS-232  (5  wires)  for  external  GSM 

modem 

 

 

TECHNICAL DATA OF THE CHRONOTHERMOSTAT 

 

Operating temperature: 

-0°C +50°C 

Humidity: 

95% maximum at 40°C 

Power  supply: 

low  voltage  (3V),  obtained  from 

communication with the boiler control board 

Protection degree: 

IP30 

Dimensions: 

140x90x32 mm 

Compliance: 

directive

 

2004/108/CE  (EMC),  directive 

2006/95/CE (LVD). 

Temperature  controls  classes  in  accordance  with  the 

delegated regulation (EU) No 811/2013:  

Class 1

, FIAMMA OT11 used in ON/OFF operation.  

Class 5

, FIAMMA OT11 used in modulating operation.  

Class 6

, FIAMMA OT11 

used with outside temperature 

compensation.

 

Weight: 

170 g 

 

Summary of Contents for OT11

Page 1: ...d the control board of the boiler takes place by means of a two wire cable the data are exchanged with the communication protocol compatible OpenTherm v3 0 Smart Power Mode Medium Power GENERAL TECHNICAL DATA FIAMMA design graphic LCD 128x64 pixel backlight timer 20 seconds LED for diagnostics signaling 7 variable function keys weekly programming 4 temperature levels T0 T1 T2 T3 resolution 0 5 C t...

Page 2: ...t boiler lockout LED with color yellow intermittent anomaly LED with color green continuous the chronothermostat is resuming work after a power failure The most frequently used functions by the user are available in the main menu It is possible to quickly browse through the pages to set for example environment temperature or the domestic hot water temperature The first time or after a reset of the...

Page 3: ...er is in stand by and has no problem Under the indication of the ambient temperature may be present in addition a line of text that provides information to the user in special cases such as the presence of error or the status of additional functions such as management of a system of solar panels integrated with the boiler and managed by the thermoregulation board Here there are the messages that m...

Page 4: ...t thermoregulation The management of the cronothermostat by the user is much simplified The functions are not distinct between the functions relating to boiler and functions relating to thermoregulation Pushing again button you switch to another option This option allows you to turn off the system temperature control environment and demand hot water operation are disabled The first level menu is c...

Page 5: ...u has a frame fixed The options previously seen remain displayed for 20 seconds then the display returns to the main screen which depends on the chosen operation mode manual automatic estate vacation off In this option however if the user does not push ESC or not push or the crhonothermostat continues to show the control panel with its solar collector and accumulation temperatures and pump status ...

Page 6: ... lowest temperature with T0 the chronothermostat meets the following constraint T0 T1 T2 T3 and automatically resizes the temperatures Choosing the option Day program you enter in the following screen At the top of the screen you select the day and at the bottom of the screen displays the day program Pressing the and buttons you can select the day For example suppose you want to program the day Mo...

Page 7: ...emperature It is a regulation that requires a specific knowledge of the heating system installed and is reserved therefore for advanced users make changes without knowledge of the techniques of temperature control is not recommended The chronothermostat allows you to choose among four methods of temperature control environment Proporzional On Off Outside temperature compensation Outside temperatur...

Page 8: ...circuit heating according to the formula Ti Tap Te hc Tap when Ti circuit heating setpoint Tap room temperature setpoint Te external temperature measured hc dispersion coefficient In this formula correspond to the curves shown in Fig 2 Outside temperature compensation with mix This method of temperature control is the same climatic compensation just described with a correction dependent on the amb...

Page 9: ... status flags CH OT S P Control setpoint circuit heating C Solar cfg Solar configuration Solar sta Solar status Storage Solar storage temperature C Collector Solar collector temperature C The values displayed are updated regularly by the chrothermostat every few seconds To force loading you can press the middle button transparent and get an instant update Pushing ESC instead to return to the main ...

Page 10: ...een chronothermostat and thermoregulation board master side In particular next to the data the following symbols appear correct data exchange T timeout RX error R RX error generic error unknown P parity error E syntax error Through the Restart command is possible to reconfigure the chronothermostat after interventions hardware software occurred without disconnecting the power adapter on thermoregu...

Page 11: ...6 8 11 Table 1 Correspondence between the connector pins of the serial cable Figura 3 Position connector J2 on C S for connection with a GSM modem Displaying modem status In the line on central text of LCD display you can check the status of the modem Particularly in the initial phase if the modem is detected if the SIM card is active and the GSM network is present the screen will automatically ap...

Page 12: ...ONNECTION TO THE BOILER INSTALLATION INSTRUCTIONS Respect National and European standards EN 60335 1 pr EN50165 regarding electrical safety Before turning on check the cables incorrect wiring may damage the devices and compromise safety Connect and disconnect the control system only in the absence of voltage Avoid exposing the system to dripping water INSTALLING THE CHROTHERMOSTAT ON THE WALL Firs...

Page 13: ... 370049 Villa Bartolomea VR ITALY Tel 39 0442 659028 Fax 39 0442 659045 http www fiammagiro com E mail info fiammagiro it 22 05 2017 Subject to amendments without notice 140 0 90 0 1 2 30 8 Figure 6 external dimension 9 50 5 00 9 00 2 20 5 00 10 40 9 50 18 25 17 15 ø 3 80 Figure 5 fixing holes of the base back view NOTE FIAMMA OT11 is available in white shown on page 1 or black as the image ...

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