Viessmann SDIO Installation And Service Instructions For Contractors
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Viessmann SDIO Installation And Service Instructions For Contractors

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Installation and service instructions
for contractors
SDIO/SM1A electronics module
In conjunction with the Vitotronic control unit and HMU heat management unit
■
■
For controlling and regulating a solar DHW heating system
■
Solar functions:
With central heating backup
–
With 2nd cylinder preheating
–
–
With thermostat function
SDIO/SM1A electronics module
6131981 GB
9/2019
VIESMANN
Please keep safe.

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Summary of Contents for Viessmann SDIO

  • Page 1 VIESMANN Installation and service instructions for contractors SDIO/SM1A electronics module In conjunction with the Vitotronic control unit and HMU heat management unit ■ ■ For controlling and regulating a solar DHW heating system ■ Solar functions: With central heating backup –...
  • Page 2 Safety instructions Safety instructions Please follow these safety instruc- tions closely to prevent accidents and material losses. Safety instructions explained Danger Note This symbol warns against the risk Details identified by the word "Note" of injury. contain additional information. Please note This symbol warns against the risk of material losses and environmen- tal pollution.
  • Page 3 Viessmann. water pipes to discharge static loads. Repair work Please note Repairing components that fulfil a safety function can compromise the safe operation of the system. Replace faulty components only with genuine Viessmann spare parts.
  • Page 4 Safety instructions Safety instructions (cont.) Safety instructions for operating the system If you smell gas Condensate Danger Danger Escaping gas can lead to explo- Contact with condensate can be sions which may result in serious harmful to health. injury. Never let condensate touch your Do not smoke.
  • Page 5 Safety instructions Safety instructions (cont.) Danger The simultaneous operation of the boiler and appliances that exhausts air to the outside can result in life threatening poisoning due to a reverse flow of flue gas. Fit an interlock circuit or take suita- ble steps to ensure an adequate supply of combustion air.

  • Page 6: Table Of Contents

    ■ Configuring the SDIO/SM1A electronics module for KM-BUS (over- ■ view of coding addresses) ..............13 Configuring the SDIO/SM1A electronics module for PlusBus .... 18 ■ 4. Troubleshooting Faults displayed with a fault code ............19 Errors without fault code display ............19 Repairs ....................
  • Page 7 Index Index (cont.) Auxiliary function for DHW heating ............. 29 ■ Differential temperature control 2 ............30 ■ Differential temperature control for central heating backup ....30 ■ Thermostat function ................30 ■ Solar function with central heating backup ......... 30 ■...

  • Page 8: Disposal Of Packaging

    Information Disposal of packaging Please dispose of packaging waste in line with statu- tory regulations. Symbols The steps in connection with commissioning, inspec- Symbol Meaning tion and maintenance are found in the "Commission- Reference to other document containing ing, inspection and maintenance" section and identified further information as follows: Step in a diagram:...

  • Page 9: System Examples

    Information System examples Available system examples: See www.viessmann- schemes.com. Spare parts lists Information about spare parts can be found on the Viessmann spare parts app.

  • Page 10: Overview Of Electrical Connections

    Only strip the minimum of insulation from ■ cables as close as possible to the terminals and bundle tightly to the corresponding termi- nals. ■ Secure cables with cable ties. SDIO/SM1A electronics module SDIO/SM1A F1 T 2 A & aÖ fÖ L ? N...

  • Page 11: Power Supply

    III (3 mm) for full isolation. The isolator Observe max. connected load of all accessories must be fitted in the permanent electrical installation, (400 W). If required, connect the SDIO/SM1A elec- in line with installation requirements. We additionally recommend installing an AC/DC- tronics module directly to the mains supply: See ■...

  • Page 12: Configuring The Sdio/Sm1A Electronics Module

    2. With no other connections, connect the SDIO/SM1A electronics module to mains voltage only and switch on. The LED on the top left of the PCB flashes for 1 minute. After 1 minute, the LED lights up permanently. The SDIO/SM1A electronics module is now reset to the factory setting.

  • Page 13: Configuring The Sdio/Sm1A Electronics Module For Km-Bus (Overview Of Coding Addresses)

    Commissioning Configuring the SDIO/SM1A electronics module (cont.) Configuring the SDIO/SM1A electronics module for KM-BUS (overview of coding addresses) Note Parameter values in bold are factory settings. 00 Start temperature differential, solar circuit pump Display Value Explanations 00:8 ... K 00:2 to...
  • Page 14 None 0A:0 Stagnation time reduction not active 0A:5 ... K 0A:1 to 0A:40 0B Frost protection function for solar circuit Display Value Explanations 0B:0 0B:1 Not required in conjunction with Viessmann heat transfer medium...
  • Page 15 Commissioning Configuring the SDIO/SM1A electronics module (cont.) 0C Delta T monitoring Display Value Explanations 0C:0 0C:1 No flow rate captured in the solar circuit, or flow rate too low. 0D Night DHW circulation monitoring Display Value Explanations 0D:0 0D:1 Unintentional flow rate in the solar circuit (e.g. at night) is captured.
  • Page 16 Commissioning Configuring the SDIO/SM1A electronics module (cont.) Please note For DHW cylinders with a solar thermal system: This maximum cylinder temperature may not be set higher than 80 °C. This prevents the temperature lim- iter from responding unnecessarily. 12 Minimum collector temperature...
  • Page 17 Commissioning Configuring the SDIO/SM1A electronics module (cont.) 23 Stop temperature differential for central heating backup Display Value Explanations Parameter "20:4" must be set. 23:4 ... K 23:1 to 23:29 24 Start temperature for thermostat function Display Value Explanations Parameter "20:5" or "20:6" must be set.

  • Page 18: Configuring The Sdio/Sm1A Electronics Module For Plusbus

    28:1 to 28:60 Configuring the SDIO/SM1A electronics module for PlusBus If using the SDIO/SM1A electronics module in conjunction with PlusBus (plug ), the parameters are listed in the installation and service instructions for the heat generator. Heat generator installation and service instructions...

  • Page 19: Faults Displayed With A Fault Code

    Output not switched or per- Incorrect function configured. Check setting of coding address "20". manently switched. SDIO/SM1A electronics mod- Check connection of output (see page 20). ule is faulty. Carry out a relay/actuator test (see the service instructions for the heat generator or the Vitotronic control unit).

  • Page 20: Check Solar Circuit Pump At Output Sf

    ∼ Output faulty 230 V . The pump speed is governed by means of a – Replace the SDIO/SM1A electronics module. control signal via PWM connection. – Solar circuit pump faulty Code/parameter "02:2" must be set. Replace solar circuit pump.

  • Page 21: Incorrect Circulation In The Solar Circuit

    Troubleshooting Repairs (cont.) Temperature in °C Fig. 3 Collector temperature sensor & (TS2, sensor type: NTC 20 k Ω ■ Cylinder temperature sensor (TS1) Temperature sensor (TS3) ■ ■ Temperature sensor aÖ (TS4) (sensor type: NTC 10 k Ω Incorrect circulation in the solar circuit If code/parameter "0D:1"...

  • Page 22: Version With Sm1 And Km-Bus (Solar Dhw Heating)

    Function description – version with SM1 Version with SM1 and KM-BUS (solar DHW heating) Note Function description when using the SDIO/SM1A elec- tronics module in conjunction with PlusBus (plug see from page 28. Solar DHW heating The solar circuit pump starts according to the following The maximum collector temperature set in coding ■...

  • Page 23: Suppression Of Dhw Cylinder Reheating By The Heat Generator

    Function description – version with SM1 Version with SM1 and KM-BUS (solar DHW heating) (cont.) Suppression of DHW cylinder reheating by the heat generator In systems with boilers In systems with heat pumps Reheating is suppressed in 2 stages: During solar DHW heating, the "Set DHW tempera- ■...

  • Page 24: Reducing The Stagnation Time

    Function description – version with SM1 Version with SM1 and KM-BUS (solar DHW heating) (cont.) Reducing the stagnation time If there is an excess of solar energy, the speed of the The temperature differential for reducing the stagna- solar circuit pump is reduced before the maximum cyl- tion time is adjustable in coding address "0A".

  • Page 25: Collector Frost Protection Function

    Version with SM1 and KM-BUS (solar DHW heating) (cont.) Collector frost protection function Viessmann collectors are filled with Viessmann heat To prevent damage to the collectors, the solar circuit transfer medium. Consequently, this function does not pump is switched on if the collector temperature falls need to be enabled.

  • Page 26: External Heat Exchanger

    Function description – version with SM1 Version with SM1 and KM-BUS (solar DHW heating) (cont.) Different modes of operation can be achieved by determining the thermostat start temperature (coding address "24") and stop temperature (coding address "25"): ■ Start temperature < stop temperature: Thermostat function e.g.

  • Page 27: Relay Kick

    Function description – version with SM1 Relay kick To prevent the pumps and valves from seizing up they are started for about 10 s every 24 h.

  • Page 28: Version With Sdio/Sm1A Electronics Module And Plusbus

    Function description – version with SDIO/SM1A Version with SDIO/SM1A electronics module and PlusBus Solar DHW heating Note The solar circuit pump is switched off if one of the fol- Set or alter the functions described below in the lowing criteria is met: parameters in the "Solar"...

  • Page 29: Minimum Collector Temperature Limit

    Heat statement (solar yield) The following factors are taken into consideration In the delivered condition, parameter 1136.3 is set to a when calculating the heat amount: value of 1 (operation with Viessmann heat transfer ■ Differential from collector and cylinder temperature medium).

  • Page 30: Differential Temperature Control 2

    Function description – version with SDIO/SM1A Version with SDIO/SM1A electronics module and… (cont.) Differential temperature control 2 If the temperature captured at temperature sensor 7 Note (TS3) is higher, by the selected start/stop temperature Function can only be set during commissioning differential (parameters 1599.0 and 522.3), than the...

  • Page 31: Solar Function With Thermostat Function

    Function description – version with SDIO/SM1A Version with SDIO/SM1A electronics module and… (cont.) Solar function with thermostat function This function always requires a 2nd cylinder as a pre- When the temperature for the preheating cylinder set heating cylinder, which is preheated by solar energy or at the thermostat is reached, the transfer pump is acti- a wood heating system, for example.

  • Page 32: Specification

    Specification Specification Rated voltage 230 V∼ Rated frequency 50 Hz Rated current Power consumption – electronics Power consumption 8.5 mA Protection class IP rating IP 20D to EN 60 529, ensure through design/ installation. Permissible ambient temperature Operation 0 to +40 °C ■...
  • Page 33 Specification Connection and wiring diagram (cont.) Temperature sensor, NTC 10 k (TS4, if instal- PlusBus for connection to the HMU heat man- aÖ Ω led) agement unit, DIO electronics module or ADIO Transfer pump or 3-way diverter valve electronics module Solar circuit pump KM-BUS to Vitotronic boiler control unit Power supply...

  • Page 34: Final Decommissioning And Disposal

    Disposal Final decommissioning and disposal Viessmann products can be recycled. Components For decommissioning the system, isolate the system and substances from the system are not part of ordi- from the power supply and allow components to cool nary household waste.
  • Page 35 Declaration of Conformity Declaration of Conformity We, Viessmann Werke GmbH & Co. KG, D-35107 Allendorf, declare as sole responsible body that the named product complies with the European directives and supplementary national requirements in terms of its design and operational characteristics.
  • Page 36 Keyword index Additional function, DHW heating......25 Maximum collector temperature Auxiliary function for DHW heating – With SDIO/SM1A electronics module and PlusBus 28 – With SDIO/SM1A electronics module and PlusBus 29 – With SM1 and KM-BUS...........23 Minimum collector temperature – With SM1 and KM-BUS...........23 Capturing the collector temperature......24...
  • Page 40 Viessmann Werke GmbH & Co. KG Viessmann Limited D-35107 Allendorf Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB Fax: +49 6452 70-2780 Telephone: +44 1952 675000 www.viessmann.com Fax: +44 1952 675040 E-mail: info-uk@viessmann.com...

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