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Synco living Train the Trainer Functions and Operation DHW Heating Spring 2008

Synco living Train the Trainer Functions and Operation DHW Heating Spring 2008. Functions and Operation Overview DHW I.

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Synco living Train the Trainer Functions and Operation DHW Heating Spring 2008

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  1. Synco livingTrain the TrainerFunctions and OperationDHW HeatingSpring 2008

  2. Functions and OperationOverview DHW I The central apartment unit QAX910 supports DHW heating with a storage tank installed in the apartment itself, or remote control of central DHW heating with a primary controller (e.g. Synco) or some other central apartment unit via KNX-TP1. DHW heating in the apartment KNX TP1 SFH MFH

  3. Functions and OperationOverview DHW II Primary DHW heating With central apartment unit With Synco controller KNX TP1 KNX TP1

  4. Functions and OperationOverview DHW III • Remote control • Main menu > Commissioning > DHW > Operation external DHW > . . . • Yes, without time switch • Yes, with time switch KNX TP1 • Manual forced charging • Operating mode (Last Wins) • Display of the current DHW temperature • 7-day time switch (1 master in the system) Time switch master (janitor) Time switch slave

  5. Functions and OperationOverview DHW IV DHW control with charging pump

  6. Functions and OperationOverview DHW V DHW control with diverting valve

  7. Functions & OperationOverview DHW VI DHW discharge protection The discharge protection function is only active when a flow temperature value is received from a KNX controller (KNX TP1).

  8. Functions and OperationOverview DHW VII Controlled electric immersion heater If a DHW sensor is configured, DHW heating is always effected with a controlled electric immersion heater. If no DHW sensor is configured, DHW heating is ensured with the electric immersion heater, but uncontrolled (via thermostat). In that case, the central apartment unit only controls enabling of the electric immersion heater. In alternating operation with charging pump / diverting valve and electric immersion heater, the changeover criterion used is summer operation (summer = electric immersion heater). RRV9xx

  9. Functions and OperationFunctions and Settings • The following functions and settings are available: • Holidays / special days • Manual forced charging • DHW operating mode • Operating mode absence • Operating mode contact • 7-day time switch • Legionella function • Changeover electric immersion heater • Supervision of the DHW temperature • DHW priority • Switching differential • Charging time maximum • Forced charging • Setpoint increase DHW charging • System pump • Summer operation electric immersion heater • Overrun time DHW charging pump / diverting valve • Locking and forced signals

  10. Functions and OperationFunctions and Settings • Holidays / special days • Main menu > Holidays / special days > Calendar > • The holidays / special days program allows entry of up to 16 holiday or special day periods. • It is possible to enter the beginning and the end of the period plus the reason for absence. Example: • Start: 29.05.2007 08.00 • End: 31.05.2007 17.00 • Reason: Holidays • *: Every year on the same date

  11. Functions and OperationFunctions and Settings • Holidays / special days • For DHW heating, the operating modecan be selected: • Main menu > Holidays/special days > DHW operating mode holidays > … • Normal • Reduced • Protection • Note: • If “Holidays“ and “Absence“ are active at the same time, DHW heating maintains the DHW temperature level set for the holiday period.

  12. Functions and OperationFunctions and Settings • Manual forced charging • Main menu > DHW > Operating mode > Forced charging manual > … • No • Yes • An extended press on the central apartment unit‘s DHW / ventilationbutton triggers one-time forced charging of DHW to the Normal setpoint. During the period of time forced charging is active, the DHW symbol on the display blinks.

  13. Functions and OperationFunctions and Settings DHW / ventilation button The following functions are assigned to the DHW / ventilation button:

  14. Functions and OperationFunctions and Settings DHW operating mode / setpoints Main menu > DHW > Operating mode> Preselection > … The DHW operating mode offers different temperature levels. The central apartment unit provides a total of 4 different operating modes:

  15. Functions and OperationFunctions and Settings • DHW operating mode • A short press on the central apartment unit‘s DHW / ventilation button offers manual selection of the DHW operating mode: • Auto • Normal • Reduced • Protection The current DHW operating mode can be viewed on the central apartment unit under: Main menu > DHW > Operating mode > State > …

  16. Functions and OperationFunctions and Settings • Operating mode “Absence“ • During absence, the DHW is controlled to the selected operating mode, independent of the current DHW operating mode: • Main menu > DHW > Operating mode > Operating mode absence > … • Normal • Reduced • Protection Switch from Normal to Reduced Absence Partly monitored

  17. Functions and OperationFunctions and Settings • Operating mode contact • The operating mode contact can be used to override the DHW operating mode. When the contact is activated, the operating mode can be preselected: • Main menu > DHW > Operating mode > Operating mode contact > … • --- (No impact) • Normal • Reduced • Protection Change from Normal to Reduced

  18. Functions and OperationFunctions and Settings • 7-day time switch • Main menu > DHW > Time switch > … • With the 7-day time switch, up to 6 switching times per day, 2 temperature levels, and 1 special day, can be set. • Normal • Reduced Normal Reduced 0 6 12 18 24

  19. Functions and OperationFunctions and Settings • DHW state • The current DHW state can be read off at the central apartment unit: • Main menu > DHW > DHW state> … • Actual value of DHW temperature • DHW temperature setpoint • Charging pump (on/off) • Electric immersion heater • Plant operation (ready/charging) • Cause (commissioning/frost/legionella function/time switch) • Charging time limit (inactive/active)

  20. Functions and OperationFunctions and Settings • Legionella function • The DHW storage tank temperature is raised to the selected legionella setpoint. • The following settings can be made: • To what setpoint shall the DHW storage tank be heated up? • Main menu > DHW > Legionella setpoint > {Temperature} • How often shall the legionella function be activated? • Main menu > DHW > Legionella protection frequency> {Day} • At what time of day shall the legionella function be activated? • Main menu > DHW > Legionella protection time > {Time} • How long shall the DHW storage tank be maintained at the legionella protection setpoint? • Main menu > DHW > Legionella protection period > {Time} Note: The selection of Never deactivates the legionella function (legionella protection frequency).

  21. Functions and OperationFunctions and Settings Legionella function

  22. Functions and OperationFunctions and Settings • Changeover to electric immersion heater • Main menu > DHW > Settings > Changeover electric immersion heater > … • How shall DHW be produced during summer operation? • Yes • In summer operation, the DHW storage tank is charged with the help of the electric immersion heater • No • In summer operation, a heat source is required for charging the DHW storage tank

  23. Functions and OperationFunctions and Settings Supervision of the DHW temperature Main menu > DHW > Settings > Maximum temperature alarm > … Main menu > DHW > Settings > Minimum temperature alarm > … The controller is capable of continuously monitoring the DHW temperature. If the DHW temperature exceeds the Maximum temperature alarm, or falls below the Minimum temperature alarm, a fault status message is displayed. When using setting “---“, DHW temperature supervision is deactivated.

  24. Functions and OperationFunctions and Settings • DHW priority • Main menu > DHW > Settings > Priority > . . . • None (DHW request) • Heating control is not affected by DHW charging • Absolute (DHW request) • DHW charging is given priority. During DHW charging, the apartment pump is deactivated DHW & heating pump only DHW pump

  25. Functions and OperationFunctions and Settings Switching differential Main menu > DHW > Settings > Switching differential > {1… 20 K} The switching differential is used to control DHW charging. Charging is enabled when the DHW temperature drops below the DHW setpoint by the amount of the switching differential set here. Charging is stopped as soon as the DHW setpoint is reached again.

  26. Functions and OperationFunctions and Settings Maximum charging time Main menu > DHW > Settings > Charging time max > {5 … 250 min} To prevent DHW charging from being activated for excessive periods of time, DHW charging with absolute priority can be limited (5…250 min) (=> heating plant locked for too long, or operation restricted). If the DHW setpoint is not reached during this period of time, DHW charging will be aborted. In that case, charging remains disabled for the same period of time. On completion of that time, charging is effected again the normal way via the storage tank temperature. Q1: Diverting valve

  27. Functions and OperationFunctions and Settings • Forced charging via QAX910 • When shall automatic forced charging take place? • Main menu > DHW > Settings > Forced charging > . . . • Never • Forced charging is deactivated. However, activation of forced charging via the central apartment unit‘s DHW button is still possible • With 1st change to normal • Forced charging takes place when, for the first time that day, the Reduced setpoint changes to the Normal setpoint • With every change to normal • Forced charging takes place every time the Reduced setpoint changes to the Normal setpoint

  28. Functions and OperationFunctions and Settings Forced charging via QAX910 Forced charging can enforce DHW charging even if the switch-on criterion has not yet been reached. Start: Forced charging is started if activated and when the storage tank temperature lies at least 1 K below the Normal setpointEnd: Forced charging is terminated when the Normal setpoint is reached An extended press on the central apartment unit‘s DHW button triggers one-time DHW forced charging to the Normal setpoint.

  29. Functions and OperationFunctions and Settings Setpoint increase DHW charging Main menu > DHW > Settings > Setpoint increase DHW charging > … To make possible DHW charging, the flow temperature must be higher than the required DHW setpoint. The above parameter is used to set the desired increase.

  30. Functions and OperationFunctions and Settings • System pump • Main menu > DHW > Settings > System pump required > … • Yes • No • If the system pump is controlled by a KNX TP1-compatible controller, it can be selected whether the system pump shall run during DHW charging (depending on the selected type of plant). A: System pump required for DHW charging B: System pump not required for DHW charging

  31. Functions and OperationFunctions and Settings • Summer operation with electric immersion heater • It is possible to define whether the DHW time switch shall be used for controlling the electric immersion heater: • Main menu > DHW > settings > Summer operation electric immersion heater > … • Without time switch • The time switch has no impact on the control of the electric immersion heater in the summer. The DHW is constantly controlled to the Normal setpoint • With time switch • The controller gives consideration to the time switch and the holiday program for control of the electric immersion heater in the summer. The DHW operating mode must be set to “Auto“ • Note: • When selecting With time switch, consideration can be given to locking times enforced by the utility company.

  32. Functions and OperationFunctions and Settings Pump overrun time (valid for pumps and mixing valves) Main menu > Apartment > Settings > Pump overrun time When there is a heat request from one of the rooms, the room group pump is activated. When the request no longer exists, the pump is deactivated on completion of the overrun time. Note: The overrun time is the same for all pumps (room groups, DHW). On Off On Off Heat request Pump overrun time Pump Time

  33. Functions and OperationFunctions and Settings Locking signals and forced signals Space heating (room group pump) responds to locking signals (internal / external DHW) generated as a result of absolute DHW priority (signal from the QAX910 or the primary controller). In that case, the apartment pump is deactivated and there is no response to forced signals. Apartment pump M1 off DHW pump M2 on

  34. Functions and OperationExercises • DHW functions 1. Press the DHW / ventilation button to select DHW operating mode “Normal“. 2. Select DHW operating mode “Auto“ via the menu dialog. 3. Check the DHW state via the menu dialog. 4. Parameterize “Absolute DHW priority“. 5. Parameterize the legionella function to suit your needs. 6. Trigger manual forced charging via the DHW / ventilation button. When the function is active, check the DHW symbol.

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