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Technical specification Honeywell Combustion Controls srl

Title: DSP49G2128– Dot Matrix MMI for boiler applications

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Description Ope. App. Date Rev.First Issue GiaCri 0090013 120910 A Added modbus settings GiaCri 0097693 31-Jan-2013 B

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Table of contents

1. Revisions .............................................................................................................................................. 3 2. Reference Standards and Approvals ................................................................................................ 3

2.1. Standards .............................................................................................................................................. 3

2.2. Approvals ............................................................................................................................................... 3 3. Quality assurance statement .............................................................................................................. 4 4. Identification ........................................................................................................................................ 4 5. Abbreviations & Nomenclature .......................................................................................................... 4 6. Product Description ............................................................................................................................ 6

6.1. Description of the device ....................................................................................................................... 6

6.2. layout ..................................................................................................................................................... 6

6.3. Connector and Connections .................................................................................................................. 7

6.4. Electrical & Environmental Specifications ............................................................................................ 8 7. PRODUCT FUNCTIONALITY SPECIFICATION ................................................................................ 10

7.1. USER INTERFACE ............................................................................................................................. 10

7.2. BACKLIGHT ........................................................................................................................................ 10

7.3. PUSH-BUTTON USAGE ..................................................................................................................... 10 8. High voltage Output .......................................................................................................................... 10 9. Low Voltage input (AUX 0) ............................................................................................................... 11 10. High Voltage Input ............................................................................................................................. 11 11. 0-10Vdc input ..................................................................................................................................... 11 12. Microcomm Bus Master Communication ........................................................................................ 11 13. Microcomm Bus Slave Communication ......................................................................................... 11 14. OpenTherm Communication Requirements ................................................................................... 11 15. Modbus interface ............................................................................................................................... 12 16. Outside Temperature Control ........................................................................................................... 12

16.1.1. 4 POINTS OTC CURVE ............................................................................................................................................. 12 16.1.2. HONEYWELL SIMPLIFIED OTC CURVE ................................................................................................................. 12

17. ECO working mode ........................................................................................................................... 13 18. HOLIDAY working mode ................................................................................................................... 13 19. goHAPI User interface data download ............................................................................................ 14 20. ERROR SCREENS DESCRIPTION ................................................................................................... 14 21. APPENDIX -A- .................................................................................................................................... 18

21.1. MAIN SCREENS ................................................................................................................................. 18

21.2. PUSH BUTTON ................................................................................................................................... 19



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21.3. SCREENS DESCRIPTION .................................................................................................................. 20 21.3.1. MAIN MENU SCREEN ............................................................................................................................................... 20 21.3.2. TECHNICIAN MENU ACCESS CODE ...................................................................................................................... 21 21.3.3. TEXT MENU SCREEN .............................................................................................................................................. 21 21.3.4. PARAMETER/VALUE SET MENU ............................................................................................................................ 22 21.3.5. EXTENAL TEMPERATURE RELATED SCREEN SETTINGS ................................................................................. 23 21.3.6. DOMESTIC HOT WATER SETTINGS ....................................................................................................................... 24 21.3.7. PUMP POST CIRCULATION ..................................................................................................................................... 25 21.3.8. MAINTENANCE SETTINGS ...................................................................................................................................... 25 21.3.9. DEFAULT FACTORY SETTING ................................................................................................................................ 26 21.3.10. ERROR MESSAGE SCREEN ................................................................................................................................. 26 21.3.11. MENU STRUCTURE OVERVIEW ........................................................................................................................... 28

22. APPENDIX -B- .................................................................................................................................... 38

Supported Microcomm Message ID’s with functional description .................................................................... 38

Supported External microcomm Message ID’s ................................................................................................ 39 23. APPENDIX -C- IMPLEMENTED OT+ ID’S ......................................................................................... 40 24. APPENDIX –D- MODBUS IMPLEMENTATION ................................................................................. 41

24.1. Modbus configuration .......................................................................................................................... 41

24.2. Supported commands ......................................................................................................................... 41

24.3. Modbus register map ........................................................................................................................... 41

24.4. 0x11 Report Slave ID .......................................................................................................................... 44 25. APPENDIX E: EEPROM DEFAULT CONFIGURATION ................................................................... 45



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1. Revisions Software

Date Description of amendments

Rev. B: Added modbus parameters settings to Technician menu under SYSTEM SETTINGS - BOILER PARAMETERS – MODBUS PARAMETERS. See paragraph 21.3.11. Added more details related to modbus setting at paragraph 24.1 Added RTC related settings/info

2. Reference Standards and Approvals

2.1. Standards

DSP49G2128 functionality fulfill the following standard:

EN 55014-1 For EMCD conformity

EN 60730 - 1

For LVD and EMCD conformity

When used together with boiler controls devices no violation of other product related to the following standards can occur:

EN298:2003

Automatic gas burner control systems for gas burners and gas burning appliances with or without fans

EN 55014-1 Electromagnetic compatibility – Emissions

EN 60730 - 1 Automatic electric controls for household and similar use

2.2. Approvals

The MMI will be used on boiler where boiler control conforms with the following EC – Directives ; system must satisfy indicated directive (self certification possible not being safety related product):

Gas Appliance Directive (90/396/EEC) Low Voltage Directive (73/23/EEC) Electro Magnetic Compatibility Directive (89/336/EEC)*



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* Conformity with Electro Magnetic Compatibility Directive regarding emission for non industrial appliances can be assumed for all selected Ordering Specification (O.S.) numbers. However conformity can only be declared as part of the appliance. Regarding immunity, all controls comply with the levels for non industrial appliances.

3. Quality assurance statement Products are manufactured under an ISO 9001 (1994) based and certified Quality System. The quality system is described in the Honeywell Combustion Controls Center Quality Assurance Program and its related operational procedures and instructions. The quality system is approved by Gastec against certificate number 9.302/2. The quality organization is responsible for defining, maintaining, improving and verification of the quality systems in the field of design, production process and field quality service. Assembly processes are guided by work instructions. Patrol inspections form part of the assembly processes. Assembly inspection is performed by employees of the quality control department, using their own authorized equipment. All inspections (incoming and assembly) are performed by trained personnel and according inspection procedures.

4. Identification To ensure product tracking and identification, each board shows:- Bar code label with production data Honeywell part number

Customer part number

Notes

DSP49G2128B -

5. Abbreviations & Nomenclature MMI: man Machine Interface LCD: Liquid Crystal Display



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TBD: To Be Decided ID: Identifier (data) HL: Temperature High Limit TTB: Exhaust Temperature Limit ( check ) APS: Air Pressure Switch.



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6. Product Description

6.1. Description of the device The Dot Matrix DSP49G2128 MMI operates in conjunction with esys/maXsys based boiler controller having a standard microcom interface. The MMI consists of an LCD Dot matrix user interface plus below indicated additional fixtures: 0-10V power input 2 General purpose relay output Open Therm protocol MODbus protocol Multipurpose input ON/OFF at low voltage (5mA) Multipurpose input 230Vac (1mA) HW basic configuration functionalities of DSP49G1053B . Support of maximum 12 rubber conductive key pushbutton position RTC with battery back-up

6.2. layout Overall dimensions Max 162mm x 93mm BOARD thickness 1,6 mm Fixing points n° 4 holes Ø 3 mm) Tolerances according to STP0015 Housing To be provided by OEM

Fig .1 Front view with optional proposed front panel



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6.3. Connector and Connections

6 5 4

3 2 1 PTHCONNECTOR FRONT VIEW SMDCONNECTOR FRONT VIEW - PIN NUMBERING - - PIN NUMBERING -

Pin PTH

Pin

SMD Description Connection

ESYS 1 COMM. X01 1 1 Microfit communication – ESYS 1

X01 2 3 Microfit communication – ESYS 1 Tx

X01 3 5 Microfit communication – 7 Vcc from ESYS 1

X01 4 7 Microfit

X01 5 9 Microfit

X01 6 11 Microfit

ESYS 1 COMM. X01 7 2 Microfit communication – ESYS 1 GND

X01 8 4 Microfit communication – ESYS 1 Rx

X01 9 6 Microfit communication – 20 Vcc from ESYS 1

X01 10 8 Microfit

X01 11 10 Microfit

X01 12 12 Microfit Gnd

EXT COMM X03 1 1 Microfit Ext Communication +24v

X03 2 3 Microfit Ext Communication Rx

X03 3 5 Microfit Ext Communication +5v

X03 4 2 Microfit Ext Communication Gnd

X03 5 4 Microfit Ext Communication Tx

X03 6 6 Microfit Ext Communication Gnd

MISC

INPUT

X04 1 1 Microfit 0 – 10 Vdc input +

X04 2 3 Microfit Open Therm Gnd

X04 3 5 Microfit Open Therm Signal

X04 4 7 Microfit External sensor Gnd

X04 5 9 Microfit External sensorSignal

X04 6 2 Microfit 0 – 10 Vdc input -

X04 7 4 Microfit

X04 8 6 Microfit

X04 9 8 Microfit Room thermostat /Aux in0

X04 10 10 Microfit Room thermostat /Aux in0 Gnd

HIGH

VOLTAGE

I/O

X05 1 Minifit Rly1 Free contact – Alarm Output

X05 2 Minifit Rly1 Free contact – Alarm Output

X05 3 Minifit Rly2 Free contact – Burner on

X05 4 Minifit Rly2 Free contact – Burner on

X05 5 Minifit Generic HV input – phase input

6 4 2

5 3 1



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X05 6 Minifit Generic HV input – neutral input

X07 1 1 Microfit Modbus Pup 5v

X07 2 3 Microfit Modbus Pdown Gnd

X07 3 5 Microfit Modbus Gnd

X07 4 7 Microfit

MODBUS

AUX IN

X07 5 2 Microfit Modbus B

X07 6 4 Microfit Modbus A

X07 7 6 Microfit Modbus Tb

X07 8 8 Microfit

6.4. Electrical & Environmental Specifications

Supply voltage

Powered via Microcomm , therefore ensure its specification is met (only low voltage product)

Power consumption

Max As per microcomm specification

Humidity

90% RH max at 40°C (no condensing)

Ambient temperature

-10 + 60 °C

Electrical rating

Fusing: no fuse

Relay output: free contact, Max 115/230 Vac, 0,8 A ,cosφ=0,6 (need high voltage track distances)

Multipurpose GENERIC input: 24 V DC, 5 mA

External Sensor input: 10 K B3946 NTC

0-10 Volts Input : same as DSP49G2037

Room Thermostat input : 24 V DC, 5 mA or OT+

Remote reset Input : 230 Vac, 1 mA

Modbus interface : standard RS485 non insulated (2 wires + Gnd)

RTC battery back-up: 8Hrs back-up time at nominal conditions



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Communication capabilities:

Standard microcomm interface Vs main board

Standard microcomm interface for external PC connection

OT+ version 3.0

Product life

250.000 cycles at rated loads



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7. PRODUCT FUNCTIONALITY SPECIFICATION

7.1. USER INTERFACE User interface can be fully defined via goHapi tool running on internet using firefox browser (https://go-hapi.honeywell.com ). For this reason product specification does not define any specific user interface functionality. Example of standard proposed user interface can be found in Appendix A

7.2. BACKLIGHT Lcd BACKLIGHT led are switched on any time a button is pressed and are switched off after 300 seconds last button has been pressed. In case of error backlight is permanently on.

7.3. PUSH-BUTTON USAGE Buttons are defined with a matrix approach of 3 rows/4 column. Specific button functionality can be determined via goHapi tool where each button is addressed with RxCy (x=1-3; y=1-4) selection. In set-up menu some specific functions like Enter, up-down, … can be assigned to some specific button The first column (C1 left column) is typically called a contextual button column since function of such a buttons is dynamically indicated on the LCD screen. Below is an example of possible keypad using all 12 buttons.

8. High voltage Output Dot matrix display has 2 relay independent closing contact that can be used as high voltage output. By default they are used for:



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- Rly 1: Close when esys/maxsys CH pump is running - Rly 2: CH Heat demand ON indicator

9. Low Voltage input (AUX 0) Dot matrix display has 1 low voltage input contact that can be used as general purpose input. By default it is used as CH demand signal

10. High Voltage Input Via goHapi is possible to select the usage of high voltage input between 2 different functionalities:

- CH demand - Lockout reset

11. 0-10Vdc input Dot matrix uses the analog value present on 0-10V input to generate a CH power demand proportional to this value. An analog value below 2Vdc force a CH off status (removal of heat demand) while any other value from 2 till 10Vdc generate a CH request with power demand linearly proportional to analog value. Activation of CH heat demand via 0-10V is done via user interface.

12. Microcomm Bus Master Communication

The MMI is a master in the esys/maxsys communication. This is the highest priority communication interface for the MMI. The supported ID’s (application layer) are listed in Appendix B. There will be three levels of communication priority for this. The Highest-level is communication loop that is continuously communicated. A Normal-level message is communicated once every Highest-level communication loop was finished. A Low-level message is communicated once every Normal-level communication loop was finished. A special level will also be included. Messages at this level will only be communicated once at startup.

The MMI uses the Microprocessor’s hardware USART at a speed of 19200 Baud, 8-bit Data, 1 start-bit en 1 stop-bit for Transmit (Tx) and Receive (Rx) of serial data. Further specification for the protocol is done in the document “External Communication Class 1..6” [ERE2038.doc

13. Microcomm Bus Slave Communication

The goHapi dot matrix provide a slave microcomm communication for external control . This will normally be used to connect master devices like a Personal Computer through a PC CVBC Communication cable to the MMI. It is also used to access the connected Esys/Maxsys family product, therefore functioning in such a case as a “Bridge”. The supported ID’s (application layer) are listed in appendix B. Microcomm communication is 19.2 baud UART , 8-bit Data, 1 start-bit, 1 stop-bit for Receive (Rx) and Transmit (Tx) of serial data. Further specification for the protocol is done in the document “External Communication Class 1..6” [ERE2038.doc.

14. OpenTherm Communication Requirements

The MMI is a slave in the OpenTherm Communication. This is used to connect OpenTherm Master devices for Remote control of the MMI and connected esys/maxsys family products. The supported ID’s (application layer) are listed in Appendix C.



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15. Modbus interface Details of Modbus functionality and content of ID are contained in appendix D of this document

16. Outside Temperature Control

The MMI will convert the Analog/Digital conversion result to the corresponding temperature.

Via specific goHapi selection OTC algorithm can be choosen between 2 possible options:

16.1.1. 4 POINTS OTC CURVE Via user interface Is possible to set the following values that determine the OTC curve and therefore the actual boiler setpoint during CH request:

A - Otc_offset: this is the minimum CH setpoint value

B - Otc setpoint maximum: this is the maximum CH setpoint value

C - Otc weather cold: this is the external temperature value at which the maximum CH setpoint will be used

D - Otc weather warm: this is the external temperature value at which the mminimum CH setpoint will be used

E - OTC warm weather shutdown: this is the external temperature value at which the CH heat demand will be removed/ignoired

Combining the above points CH actual setpoint will follow a line as indicated in the following figure:

16.1.2. HONEYWELL SIMPLIFIED OTC CURVE This is done trough a special lookup table between the limits of –30 to + 70 degrees Celsius. This is the standard used 8-bit lookup table.

The MMI calculate and use a Control Temperature Setpoint for Central Heating when an Outside Temperature Sensor is connected, The value of Control Setpoint is limited to the value of CH Setpoint set by User.

For calculating this Control Temperature Setpoint, the following calculation is done:

Control Temp. Setpoint = OTC Offset + C1 *(20 – Outside Temperature) / 4

Where:

C1 = derived from the OTC Curve number:

If OTC Curve number = 1..7 then C1 = OTC Curve number



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If OTC Curve number = 8, then C1 = 9



The Control Temp. Setpoint is limited by Maximum value of CH user setpoint . The Esys CH User Setpoint is aligned with the maximum of the DSP temperature range.

For Outside Temperatures above 20 degrees Celsius, Control Temp. Setpoint =10`C.

OTC CURVES

20

30

40

50

60

70

80

90

20 16 12 8 4 0 -4 -8 -12

-16

-20

OUTDOOR TEMPERATURE

WA

TE

R T

EM

PE

RA

TU

RE

. Control Temperature Setpoint (Water Temperature) in relation to the Outside Temperature

17. ECO working mode ECO working mode can be selected via pushbutton. Whenever ECO mode is selected the following functions are implemented:

- CH mode. Boiler continue to run as per actual settings but CH temperature setpoint is reduced by a value equal to ECO setpoint. In case of OTC usage or modulating setpoint received from external the actual setpoint is reduced by the value equal to ECO setpoint. In case resulting setpoint is lower than minimum, actual setpoint will be limited to minimum

- DHW mode. Same as per CH but with DHW ECO setpoint acting on DHW value ECO mode is exited automatically via time switcher or if forced manually via pushbutton, after push of same ECO button. Eco mode is indicated by ECO icon on screen when manually activated or with a text ECO below Tap/Radiator when activated by scheduler otherwise defined via goHapi

18. HOLIDAY working mode Holiday mode is entered pressing holiday button on user interface. When button is pressed a request to indicate holiday start date and holiday end date is shown . When start date is reached (00:00 of that day) boiler adjust current CH and DHW setpoint accordly to Holiday setpoint value set in menus. When end date day expire



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(24:00) boiler return to normal operation. This has to be consider to anticipate return of holiday in case home heating is required to start in advance.

19. goHAPI User interface data download Dot matrix display support goHapi functionality, used to download custom made user interface into product flash. Download is done via any serial communication package (ie hyperterminal) and standard cable connected to slave microcomm interface. To enable download press and hold for approx. 3 seconds simultaneously buttons C1-R2 (Column-Row) and C3-R2. This causes reset of the display and entering the “goHapi mode” - just at this moment buttons can be released. LCD is cleared and backlight starts blinking; at this point is possible to transfer .BIN file containing user interface description and setting. At the end of transfer display is reset and program start execute normally. Any blackout interrupts this mode leaving goHAPI part of flash data corrupted. After such unsuccessfull loading of data, the uplload mode has to be repeated with correct data file. If an inappropriate .BIN file is loaded into device, error E94 is show at the screen with comment: "HAPI mismatch, can't continue". Device is then resetted after 30 seconds waiting for correct file to be uploaded. Serial connection setting must be as follow:

- 19200 bps - Data bit 8 - Parity none - Stop bit 1 - Flow control None - Protocol XModem

20. ERROR SCREENS DESCRIPTION Error screen is splitted in different parts:

- Lower part: contain description as per following table column “description” - Upper part: contain error code number as per following table column “hard/soft lockout code”

Hard

Lockout Code

Description

E1 Failed Ignition

E2 False Flame

E3 High Boiler Temperature

E4 Air flow/damper

E5 Blower Speed



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E6 Air flow/damper

E8 Flame Circuit Error

E9 Gas Valve Circuit Error

E15 Sensor Drift

E16 Supply Sensor Stuck

E17 Return Sensor Stuck

E18 Sensor Failure

E21 Internal Control Fault

E30 Supply Sensor Shorted

E31 Supply Sensor Open

E43 Return Sensor Shorted

E44 Return Sensor Open

E80 Return > Supply

E87 External Limit Open

Soft Lockout Code

Description

E7 High Flue Temperature


E13 Reset Limit Reached




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E32 DHW Sensor Shorted

E33 DHW Sensor Open

E34 Low Voltage

E37 Low Water

E45 Flue Sensor Shorted

E46 Flue Sensor Open

E47 Water Pressure Error

E76 External Limit Open

E77 Siphon error

E81 Sensor Drift

E82

E83

E84



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E87 Overtemp lockout

E89 Incorrect Setting

E90 Firmware Mismatch

E91

E92

E93 Outdoor Sensor Shorted

E94 Internal Display Fault

E95 Supply Sensor Error

E96 Outdoor Sensor Open

E97

E98

E99 Controller Bus Error



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21. APPENDIX -A-

USER INTERFACE DESCRIPTION OF DEFAULT HONEYWELL DSP49G2128 IMPLEMENTATION

21.1. MAIN SCREENS Following pictures show the icons displayed on main screen. First 3 screens are related to normal working condition while forth is the error screen main display where date & time indication is replaced by main error number and description.

n icon Note

1 Logo On different main screens (here Honeywell logo shown but can be custome

2 snowflake Shown when winter mode (CH)

3 sun Shown when Summer mode (DHW only)

4 outside_temp Shown When OTC detected

5 house_outline Always shown

6 radiator Shown when CH enabled or striped when disabled

7 tap Shown when DHW enabled or striped when disabled

10 ON radiator Ch allowed

11 ON(tap) DHW allowed

12 ECO (radiator) CH allowed in ECO mode

13 ECO (tap) DHW allowed in ECO mode

14 OFF (radiator) CH off by timer

15 OFF (tap) DHW off by timer

16 pump_circ Pump is running or CH demand active



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18 pump_sanit DHW Pump is running or DHW demand active

19 flame1 Size of flame icon indicate flame presence & power level (0‐25%)




23 Flow temperature Indicate supply Temperature

24 Water pressure Water pressure indicator and value

25 eco_mode Shown when ECO mode activated manually

27 holiday Shown when holiday mode activated

28 warning Shown when error present

29 i_button When indicated button is pressed additional error info are displayed

30 line Separator line always shown

21.2. PUSH BUTTON Description of standard default button implementation:

R1-C1: follow corresponding LCD meaning (contextual button) R2-C1: follow corresponding LCD meaning (contextual button) R3-C1: follow corresponding LCD meaning (contextual button) R1-C2: up button used to scroll through menus R3-C2: down button used to scroll through menus R2-C2: OK button, used to confirm highlighted selection or as confirmation of what is required by LCD R1-C3: Escape button. Used to return to main screen (always active) R1-C4: On-Off button. Used to put boiler in Off mode (Only main Logo and date/time displayed (always active) R2-C3: Menu button used to enable access to both User and Installer menu (always active) R2-C4: Summer-Winter button. Used to enable-Disable CH and DHW (active in main screens) R3-C3: Holiday button. Used to enable Holiday function (active in main screens)



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R3-C4: Eco button. Used to enable Eco function (active in main screens)

21.3. SCREENS DESCRIPTION DSP user interface is build using different screen type and structures. Main screen structures are defined below:

21.3.1. MAIN MENU SCREEN

n icon x

1 user User Menu Indicator

2 tech Technician menu indicator

3 user‐access‐button When associated button pressed User menu is accessed

4 tech‐access‐locked‐button When associated button is pressed Technician menu is accessed

5 BACK‐button General indication of Back function button (valid through all screens)



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21.3.2. TECHNICIAN MENU ACCESS CODE When technician menu has to be accessed an access code is required. Access code is entered in following screen; value is 231

+- button are used to increment/decrement selected value Up-down arrow are used to select character to be modified Ok butotn will confirm value

21.3.3. TEXT MENU SCREEN Text menu screen is used to propose a list of possible selection . Via up/down arrow is possible to move through text menu, OK will confirm selection. Active selection is highlighted using reversed text approach. (only 1 line highlighted at the time) Back button will return to previous screen When menu is used for direct actions (ie enable-disable, language selection, …) on entry actual selection is highlighted. With up-down arrow is possible to move through selection, entering OK will activate highlighted selection and return to previous screen. Main User/Technician menu list is written in capital letter while all other text are in normal letter. Hereunder an example of text menu screen. A facing down arrow indicate text line did not fit into one screen and there are additional lines below A right arrow at the end of a line means hitting enter on that line there are additional info (valid for status display menu list)



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21.3.4. PARAMETER/VALUE SET MENU Parameter or value set menu are typically used to change value of a parameter, a variable, … For single value parameters screen structure is as indicated below. Title of the screen will point to parameter under modification, with contextual pushbutton parameter is changed, Ok button will confirm change while back button will return to previous screen leaving parameter unchanged. On entry display shows actual parameter value

LABEL NUMBER

MEANING

Parameter name: Screen Title Lower case 1 Icon shows effect of push button R1-C1 to parameter 2 Icon shows effect of push button R2-C1 to parameter 3 Back button 4 Parameter value area 5 Up-down indicator/button, used to move across parameters when there is more than 1 6 OK button to confirm parameter set



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21.3.5. CLOCK SCREEN SETTING Following picture shows an example of clock setting screen; real one for SW optimization has AM/PM indicator in the time space and time indicator uses a smaller font (16 Bold) . +- button are used to change the selected value , OK to confirm actual selection and move to next field (ie from Hrs to minutes). When 24 Hr or 60 Minutes are reached count is restarted from the beginning. Hour format (12 or 24 Hours is defined into setting menu) When 12 Hours format AM or PM are highlighted indicated period to whom hour is referred

21.3.6. DATE SCREEN SETTING Following picture shows date setting screen . +- button are used to change the selected value , OK to confirm actual selection and move to next field (ie from day to month to year)

21.3.7. EXTENAL TEMPERATURE RELATED SCREEN SETTINGS Below the list of screens related to variable adjustments linked to external temperature. Adjustment is done via indicated +- buttons and it is confirmed via OK button



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Outside temperature for max setpoint is the external temperature at which the CH setpoint will be put at maximum (see OTC description chapter, point C). Outside temperature for min setpoint is the external temperature at which the CH setpoint will be put at minimum (see OTC description chapter, point D) Outside temperature for switch off is the external temperature at which the CH demand is switched OFF (see 17.1.1.4, point E).

21.3.8. DOMESTIC HOT WATER SETTINGS Below the screens related to DHW setpoint adjustment Adjustment is done via indicated +- buttons and it is confirmed via OK button



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Boiler temp for heating cylinder is the temperature at which primary water is heated-up during a DHW call when boiler does not have DHW temperature sensor Domestic temperature is the DHW setpoint used in case boiler has specific DHW sensor

21.3.9. PUMP POST CIRCULATION Typically at the end of an heat demand pump is kept running for a determined time. This time is settable via the pump post circulation screen. This screen shows how post circulation time is set ; the pump affected by this setting depends on the menu the setting has been activated (CH or DHW setting) Adjustment is done via indicated +- buttons and it is confirmed via OK button

21.3.10. MAINTENANCE SETTINGS Below screens shows service company info setting and expected maintenance date. These 2 fields are supposed to be inserted by service person Data entry is done in the same way as per the others screens: +- button to change value, up-down arrow to select value to be changed, OK to save setting



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21.3.11. DEFAULT FACTORY SETTING Depending from where this screen is invoked, it will restore user of installer default factory settings. OK will start restore of data while any other key will go back to previous screen. to confirm. From user menu at the end of restore screen will go back to main while from technician menu will go back one screen

21.3.12. HOLIDAY PERIOD SETTING To program and eneable holiday functionality (CH and DHW with limited setpoint determined by settings done in CH and DHW menus) suitcase (holiday) button must be pressed. When pressed below screens asking for holiday start/end will be displayed. When holiday enabled boiler will work in the selected period with holiday setpoints set..



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21.3.13. ERROR MESSAGE SCREEN Error message is entered from main screen when an error is present and Information button is pressed. Strucutre of screen is as indicated below:

- error message contain the text indicated in chapter ERROR SCREEN DESCRIPTION under description column . Lower line of error message text area contain error number. Optionally is possible to ad dadditional text below ethe frame to provide info to user



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21.3.14. SCHEDULER SETTING SCREEN Scheduler allow possibility to define working condition ranges during the day choosing between 3 status: ON, ECO, Off. Implementation allows to set 6 different ranges/status; the “empty” time between ranges is considered to be OFF, allowing therefore to extend the real number of ranges. Via up-down key Is possible to move between ranges while +-key will increase/decries the time of specific range (when in time area) or toggle working condition when in third column . Working condition toggling allow to select On mode: boiler is enabled; ECO mode: boiler will use reduced setpoint. To facilitate changes two additional possibilities are added to working mode selection: the first one is OFF mode that cancel also the time, in case user want to delete completely a scheduler line; second is off mode to disable the boiler but maintaining the indication of range selection (this to facilitate ie a temporary disable of boiler maintaining the scheduler set). Scheduler functionality is acting independently on CH and DHW, means each of them has is own scheduler. The status of scheduler is shown on main screen with then indication ON- ECO-OFF under tap/radiator. Scheduler set can be done for each day, for group of week days, for week-end days or for the entire week. When group of day is programmed and later a single day of that group is changed, opening the group of day screen will be cleared meaning that days are not anymore equals

21.3.15. MENU STRUCTURE OVERVIEW Following is the content of User menu and submenus with associated actions/functions.

USER MENU SUBMENU 1 SUBMENU 2 NOTES

1. HEATING Heating user settings

1. CH temperature/OTC set

Set the CH temperatures and OTC curve parameters

1 CH temperature set Adjust setpoint of CH circuit



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2 Outside temperature for CH off

Set the external temperature at which Heat demand is removed. If Off heat demand is never removed by controller (only by ext RT). If OTC is not present a screen asking to hit OK will be sown

2. Eco setpoint reduction Set the temperature that will be subtracted from actual setpoint when ECO mode is activated

3 Scheduler set Invoke scheduler menu

1 Enable/disable on board scheduler

Based on selection is possible to enable/disable CH on board scheduler (in this case scheduler could be controlled externally)

2 Scheduler set Used to program on board scheduler

2. DOMESTIC HOT WATER

Domestic hot water user settings

1. DHW setpoint Set the DHW temperature (in case of DHW with sensor this is the actual DHW temperature, in case of DHW with Switch this is the base boiler Flow temperature )

2 Eco setpoint reduction

Set the temperature that will be subtracted from actual setpoint when ECO mode is activated

3 Scheduler set Invoke scheduler menu

1 Enable/disable on board scheduler

Based on selection is possible to enable/disable DHW on board scheduler (in this case scheduler could be controlled externally)

2 Scheduler set Used to program on board scheduler



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3. HOLIDAY 1 CH holiday setpoint Set CH temperature used when Holiday mode active

2 DHW holiday setpoint Set DHW temperature used during holiday mode

4 MAINTENANCE Set maintenance related info

1 Service information Used to display service company phone number or entered info

2 Service due date Shows next service due date When date expire a MSG is shown on lower part of main screen asking for service

5 SETTINGS Boiler option settings

1 Select language English Italian

Allow selection of different languages (actual language is highlighted on enter)

2 Select units Fahrenheit Celsius

Allow selection of different unit (actual unit set is highlighted on enter) Selecting Fahrenheit will force to show all units (so not only temperatures) in Imperial, selecting Celsius in European style. If Fahrenheit selected degrees value will show only even numbers (due to conversion sometimes 2 button actions are required to change value).

3Set date Allow RTC date setting.

4 Set time Allow RTC time set. When selected a screen asking for time format 24/12 Hours is opened. When selected appropriate format screens jump to time entering screen

5 Restore factory data Pressing OK all the user settings will be restored to the original factory default settings

6 DIAGNOSTICS Will display boiler usage information and errors

1 Boiler Information Display the following information: CH request



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DHW demand Firing rate (in %) * Flame ionization current (uA) * Boiler setpoint * Boiler Supply temperature * Return temperature * Flue temperature * Outdoor temperature * DHW storage temperature * Boiler fan speed (rpm*50) CH ignition (number) CH runtime (in Hours) DHW ignitions (number) DHW Runtime (in Hours) System Pressure (water pressure in bar/psi) When a line has an * at the end means that hitting Ok when line is highlighted will open a graph that shows the latest 120 variable values stored every 12 minutes (24 hours history). Sample will not be averaged over the 12 minutes period

2 Error History Show a list of recent errors. Hitting OK on highlighted error will open a new screens that contain details on boiler status when error occurred

TECHNICIAN MENU SUBMENU 1 SUBMENU 2 NOTES

1 ADVANCED CH SETTINGS

Heating installer advanced settings

1 CH power set 1. Maximum power

Set % of boiler maximum power in CH mode



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2. Minimum power

Set % of boiler minimum power in CH mode

2 CH temperatures Set (selecting OK) and show boiler temperatures

1. Absolute max temperature

Set CH absolute max temperature (CH temperature boiler setting will never exceed)

2. CH maximum setpoint

Determine higher boundary of CH setpoint

3. CH minimum setpoint

Determine lower boundary of CH setpoint

3. CH setpoint histeresys

Set CH setpoint histeresys (temperature above setpoint at which boiler will be switched off)

3. OTC Parameters Set the OTC parameters

1. Outside temp for max CH

Define external temperature at which OTC will set maximum CH setpoint

2. Outside temp for min CH

Define external temperature at which OTC will set minimum CH setpoint

3. Outside temp for CH OFF

Define external temperature at which OTC will disable central heating (even if RT request is on)

4.OTC setpoint table Show in a table the link between external temperature and actual setpoint determined by OTC parameter selection

4. CH pump settings Set pump usage related parameters

1. Post pump time Set the CH pump overrun time

5. CH anticycling timer Set the anticycling timer (minimum time between boiler goes off till next ignition)



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6. CH request type Allow selection of different CH requests based on installation type:

- Only OTC - Room Tstat - 0-10V Signal

2 ADVANCED DHW SETTINGS

Domestic hot water advanced settings

1 DHW power 1. Maximum power Set % of boiler maximum power in DHW mode

2. Minimum power Set % of boiler minimum power in DHW mode

2 DHW Temperatures Set (selecting OK) and show DHW temperatures

1. Storage temperature setpoint

Set Flow temperature during DHW mode when DHW done via thermostat (Switch)

2. Boiler temperature setpoint

Set DHW temperature setpoint when DHW done with temperature sensor

3. DHW setpoint histeresys

Set DHW setpoint histeresys (temperature above setpoint at which boiler will be switched off)

3 DHW pump settings Define pump usage in DHW mode

1. DHW post pump time

Set DHW pump overrun time

4 DHW priority Define DHW priority over CH

1. DHW priority status

Enable/disable DHW priority over CH

2. DHW priority timeout

Define after how much time DHW priority is ended (CH can be served if present for the same amount of time)

5 DHW request type Define DHW request type: - Switch - Sensor

Switch DHW start when DHW flow close



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Sensor DHW start based on required vs actual DHW temperature

3 SYSTEM SETTINGS

Boiler and system settings

1 Boiler parameters

1 Ignition power Set power % used when igniting burner

2 Delay siphon check

Delay time to validate a siphon error

3 Antilegionella Enable/disable antilegionella function

4 Modbus address Allow assignement of modbus address. In modbus address screen hitting OK address is saved and screen is moved to Modbus baudrate screen. Here is possible to select Modbus baudrate. Hitting OK baudrate is saved and screen is moved to Modbus frame screen wher ei spossible to select modbus frame characteristics. Hitting ok will go back to boiler parameter screen. In any of the above mentioned screen hitting back will return to boiler parameter screen

2 User interface settings

1 Select language English Italian Allow selection of different languages (actual language is highlighted on enter)

2 Select units Fahrenheit Celsius Allow selection of different unit (actual unit set is highlighted on enter) Selecting Fahrenheit will force to show all units (so not only temperatures) in



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Imperial, selecting Celsius in European style. If Fahrenheit selected degrees value will show only even numbers (due to conversion sometimes 2 button actions are required to change value).

3 Set date Set system date

4 Set time Set system time

3 Service settings 1 Service information

Used to insert service company phone number (selection done as per technician password enter)

2 Service due date Next service due date (input done as per date entering)

4 DIAGNOSTICS

1 Boiler Information Display the following information: CH request DHW demand Firing rate (in %) Flame ionization current (uA) Boiler setpoint Boiler Supply temperature Return temperature Flue temperature Outdoor temperature DHW storage temperature Boiler fan speed (rpm*50) CH ignition (number, stored every 20 counts so it will be 20-40-…) CH runtime (in Hours stored every hour) DHW ignitions (number , stored every 20 counts so it will be 20-40-…) DHW Runtime (in Hours stored every hour) System Pressure (water pressure in bar/psi) When a line has an * at the end means that hitting Ok



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when line is highlighted will open a graph that shows the latest 120 variable values stored every 12 minutes (24 hours history). Sample will not be averaged over the 12 minutes period

2 Lockout history Show a list of recent errors. Hitting OK on highlighted error will open a new screens that contain details on boiler status when error occurred. List maximum length is 8

3 Manual test Used to force a CH test request that will ignite the boiler (if no error conditions) at the indicated power. Manual test mode is enabled/disabled via OK button or ended when technician password timeout (default 15 minutes) expire. Exiting the manual test screen while test is in progress allow technician to navigate through other menus to check boiler status and functionality

5 USER SETTINGS Access to user settings from advanced menu. Will allow user setting of heating, domestic hot water and holiday

1 Heating Enter user menu Heating area

2 Domestic hot water Enter user menu DHW area

3 Holiday Enter user menu holiday area

6 RESTORE FACTORY SETTINGS

Pressing OK all the advanced settings will be restored to the original factory default settings



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22. APPENDIX -B- Supported Microcomm Message ID’s with functional description

To be added



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Supported External microcomm Message ID’s To be added



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23. APPENDIX -C- IMPLEMENTED OT+ ID’S Hereunder the list of implemented OT+ ID’s Class ID R/W

* Description

1 0 R Status 1 W Control setpoint (limited by CH setpoint) 5 R Fault flags/ faultcode

2 2 W Master configuration (dummy write) 3 R Slave configuration 124 W OpenTherm version master (dummy write) 125 R OpenTherm version slave 126 W Master product version (dummy write)

3 4 W Lockout reset 4 17 R Relative modulation level

18 R CH water pressure (not for WP switch configured) 25 R CH water temperature 26 R DHW water temperature (not for BT switch configured) 27 R Outside temperature 28 R CH return water temperature

5 6 R Remote parameters transfer-enable read/write flags 48 R DHW setpoint bounds (not for BT switch configured) 49 R CH setpoint bounds 56 R/W DHW setpoint (not for BT switch configured) 57 R/W Max CH setpoint

6 10 R Number of TSP’s 11 R/W TSP

7 12 R Size of fault history buffer 13 R History fault

8 14 W Maximum relative modulation level



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24. APPENDIX –D- MODBUS IMPLEMENTATION This appendix describes Modbus registers for DSP49G2128.

24.1. Modbus configuration The Modbus communication line is set to 38400b/s by default but via technician menu is possible to change it to any value between 1200 and 38400, Default modbus communication frame is 8bit, 1stop, parity none (8N1) but via technician menu can be change to 8bit, 2 stop, parity none (8N2) or 8 bit, even parity, 1 stop (8E1) Default modbus address is 1.

24.2. Supported commands The Dot-Matrix display has implemented basic Modbus commands.

0x03 Read Holding Registers 0x04 Read Input Registers 0x06 Write Single Register 0x10 Write Multiple Registers 0x11 Report Slave ID

24.3. Modbus register map The next table shows the register map for Dot-Matrix display.

ID R/W Accessible by command

Name Format Range Notes

0 R/- 0x04 (Input registers)

MB: Esys flags

Flag8 0-255 Bit: description 0: CH mode 1: DHW mode 2: Test mode 3: flame

LB: Esys flags

Flag8 0-255

Bit: description 0: fault 1: valve1 2: valve2 3: aps 4: fan 5: pump


MB: Error flags

Flag8 0-255 Bit: description 1: lockout

LB: Error code

U8 0-99 OEM specific error number.

2 R/- 0x04 (Input MB:



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registers) LB: Error source

U8 0-F 0 : Esys burner controller in cascade F : Dot-Matrix display


MB:

LB: Comfort state

U8 0-255 Comfort state Esys burner states – correct values depends on OS number V2042 states: 0: Stanby 1: Test mode init 2: Test mode run 5: DHW mode init 6: DHW mode run 7: DHW mode cool 9: CH init 10: CH run 11: CH cool

256 -/W 0x06 (Write single register)

MB: 0xAA U8 Dot-Matrix display provides a reset command on device which is filled in Error source. The reseting is done when previous command return non zero value.

LB: 0x55 U8

512 R/W 0x03 (Read Holding

Registers) 0x06 (Write

single register) 0x10 (Write

multiple registers)

MB: Heat demand flags

U8 0-255 Bit: description 0: DHW enable

LB: Heat demand

U8 0-255 Reading: 0 = No heat demand detected 0x55 = Heat demand present 0xFF = Test mode demand present Write: 0 = no heat demand 0x55 = CH demand 0xFF = Test demand Value is valid for 30s from the last successful write. When this register is written, the modbus control logic is activated and registers 513, 514 are used for control.




multiple registers)

MB:

LB: Max percentage

U8 0-100 0-100% maximal percentage power Used for Modbus control



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multiple registers)

MB:

LB: Control Set point

U8 Limited to OTC offset,

CH set point and Abs max set point

Control set point in degrees of Celsia. This value is used as a target temperature for supply sensor, when Modbus heat demand is generated.


CH supply temperature

S16 Value *0,1 [ºC] example : 278 = 27,8ºC 0x8000 invalid value


MB:

LB: CH return

temperature

S8 Value in degrees of Celsia


MB:

LB: DHW temperature

S8 Value in degrees of Celsia


MB: Sensor : Value in degrees of Celsia 0x8000 – invalid value Switch: ad value > 250 0x7FFF – Flue sensor open ad value < 5 0x0000 – Flue sensor closed If switch input is outside limits 0x8000 – invalid value

LB: Flue temperature

S8


MB:

LB: OTC temperature

S8 Outside temperature sensor Value in degrees of Celsia 0x8000 – invalid value


MB:

LB: Water pressure [bar]

U8 value from water pressure sensor/switch value * 0.1 [bar]

774 R/- 0x04 (Input MB:



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registers) LB: Flame current

U8 Flame current in uA


MB:

LB: Modulation

U8 Actual modulation level


MB:

LB: Calculated set point

U8 Actual set point for supply sensor. Value in degrees of Celsia. 0x8000 invalid value in case no set point is set.




multiple registers)

MB:

LB: CH set point max

U8 User maximal CH set point.

MB:




multiple registers)

LB: DHW set point

U8 DHW user set point.




multiple registers)

MB:

LB: Modbus address

U8 1-247 Modbus device address.

24.4. 0x11 Report Slave ID This command returns string with Dot-Matrix display identification. The identification contains information about product name and software version. Example: “DSP2128 v.00.04” – DSP2128 – product name – v.00.04 – version number



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25. APPENDIX E: EEPROM DEFAULT CONFIGURATION This appendix contain eeprom parameters description and their default value and ranges

parameter default min max unit/meaning otc_weather_warm 20 15 25 °C otc_weather_cold -15 -34 10 °C storage_setpoint 60 0 255 °C dhw_setpoint 60 10 65 °C warm_weather_temperature 6 6 25 6=OFF, otherwise °C enable 3 0 3 CH on, DHW on suspend 0 0 255 SUSPEND off language 1 1 3 enum, 1=ENGLISH relay0_cfg 0x0014 0x0000 0xFFFF special relay1_cfg 0x0010 0x0000 0xFFFF special storage_setpoint_holiday 59 0 255 °C ch_setpoint_holiday 62 0 255 °C dhw_setpoint_holiday 45 0 255 °C ch_setpoint_delta_eco 9 0 255 dif °C dhw_setpoint_delta_eco 11 0 255 dif °C scheduler_ch_enable 1 0 255 on scheduler_dhw_enable 1 0 255 on Modbus device.address 1 0 247

Modbus device.baudrate 5 0 55=MODBUS_BAUDRATE_38400

holiday start 126230400

0 epoch epoch Fri, 01 Jan 2010 00:00:00 GMT

holiday end 126230400

0 epoch epoch Fri, 01 Jan 2010 00:00:00 GMT

service due 315576000

0 epoch epoch Wed, 01 Jan 2070 00:00:00 GMT

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