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Functions and Operation Functions and Settings

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Functions and Operation Functions and Settings Powered By Docstoc
					Synco living
Train the Trainer

Functions and Operation
DHW Heating


Spring 2008

              Page 1/34                                      Train the Trainer   -   Spring 2008
               Overview   Functions & Settings   Exercices
Functions and Operation
Overview 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

   Page 2/34                                      Train the Trainer   -   Spring 2008
    Overview   Functions & Settings   Exercices
Functions and Operation
Overview DHW II
Primary DHW heating
With central apartment unit                           With Synco controller

KNX TP1                                                   KNX TP1




   Page 3/34                                      Train the Trainer   -   Spring 2008
    Overview   Functions & Settings   Exercices
Functions and Operation
Overview 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
               Time switch master (janitor)                                   temperature
                                                                              7-day time switch (1 master in the
                                                                              system)
               Time switch slave




   Page 4/34                                          Train the Trainer   -   Spring 2008
    Overview       Functions & Settings   Exercices
Functions and Operation
Overview DHW IV
DHW control with charging pump



Control of heat generation Home Automation                                                       B
                                                                                            E


       T
                                                              Q1


                                                  Q1: DHW charging pump                     Q2
                                                  Q2: Apartment pump




  Page 5/34                                           Train the Trainer   -   Spring 2008
    Overview   Functions & Settings   Exercices
Functions and Operation
Overview DHW V
DHW control with diverting valve




  Page 6/34                                       Train the Trainer   -   Spring 2008
    Overview   Functions & Settings   Exercices
Functions & Operation
Overview DHW VI
DHW discharge protection

       Required DHW setpoint
          Actual value of DHW
                  temperature
     Common flow temperature



Validity positioning signals
(Temp Req) without discharge
protection
Validity positioning signals
(Temp Req) with discharge
protection
                                                              Overrun                                   Overrun
                                                               60 s                                      60 s

Charging pump / diverting valve




The discharge protection function is only active when a flow temperature value is received from a KNX controller (KNX
TP1).

   Page 7/34                                        Train the Trainer   -   Spring 2008
    Overview     Functions & Settings   Exercices
Functions and Operation
Overview 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




   Page 8/34                                      Train the Trainer   -   Spring 2008
    Overview   Functions & Settings   Exercices
Functions and Operation
Functions 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
   Page 9/34                                       Train the Trainer   -   Spring 2008
    Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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




   Page 10/34                                       Train the Trainer   -   Spring 2008
     Overview    Functions & Settings   Exercices
Functions and Operation
Functions and Settings
Holidays / special days
For DHW heating, the operating mode can 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.




   Page 11/34                                      Train the Trainer   -   Spring 2008
     Overview   Functions & Settings   Exercices
Functions and Operation
Functions 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 / ventilation button 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.




   Page 12/34                                      Train the Trainer   -   Spring 2008
    Overview    Functions & Settings   Exercices
Functions and Operation
Functions and Settings
DHW / ventilation button
The following functions are assigned to the DHW / ventilation button:

DHW configured Ventilation configured Button function
               No                                       No                 None
                                                                           DHW:
               Yes                                      No                 Short press:             DHW operating mode
                                                                           Extended press:          Manual DHW push
                                                                           Ventilation:
               No                                       Yes                Short press:             Stage selector
                                                                           Extended press:          Forced ventilation
                                                                           Selection list:
                                                                           Short press:             DHW operating mode
               Yes                                      Yes                                         Stage selector
                                                                           Extended press:          Manual DHW forced charging
                                                                                                    Forced ventilation




   Page 13/34                                                 Train the Trainer   -   Spring 2008
    Overview         Functions & Settings   Exercices
Functions and Operation
Functions 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:


     Symbol               Description                                                        Level
                          DHW is heated up to the Normal setpoint, the Reduced setpoint or
                          the Protection setpoint in accordance with the DHW time program
                          or the holiday program.
                          The DHW temperature is maintained at the Normal setpoint.          55°C

                          The DHW temperature is maintained at the Reduced setpoint.         40°C
                          The DHW temperature is maintained at the frost Protection
                                                                                              5°C
                          setpoint.



   Page 14/34                                      Train the Trainer   -   Spring 2008
    Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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 > …


   Page 15/34                                      Train the Trainer   -   Spring 2008
    Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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




   Page 16/34                                         Train the Trainer   -   Spring 2008
    Overview       Functions & Settings   Exercices
Functions and Operation
Functions 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




   Page 17/34                                      Train the Trainer   -   Spring 2008
    Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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




   Page 18/34                                              Train the Trainer   -   Spring 2008
     Overview   Functions & Settings       Exercices
Functions and Operation
Functions 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)




   Page 19/34                                       Train the Trainer   -   Spring 2008
     Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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).


   Page 20/34                                       Train the Trainer   -   Spring 2008
     Overview    Functions & Settings   Exercices
Functions and Operation
Functions and Settings
Legionella function
                                                                                        Duration legionella function

                                                                            Start     Reset      Start                 End




       Legio protection
               setpoint                                       1K

                       DHW SD

                                2K



Actual value DHW temperature
                                                                                                         Normal setpoint
             Start LegioFcn
          (day / time of day)

                Status LegioFcn

                  DHW request




   Page 21/34                                           Train the Trainer   -   Spring 2008
     Overview        Functions & Settings   Exercices
Functions and Operation
Functions 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




   Page 22/34                                      Train the Trainer   -   Spring 2008
    Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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.


                                                    1K                                    1K


           Fault status message:                                                                   Fault status message:
           Temperature fell below                                                                  Temperature exceeded
                 limit value                                                                       limit value



                              Min. temperature alarm                                  Max. temperature alarm


   Page 23/34                                            Train the Trainer   -   Spring 2008
     Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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

                                                                                 only DHW pump                           DHW & heating pump


                                                                                                                                                              E      B

                                                                                             Absolut priority
                                                                                                                        Heat request              Q
                                                    Heat demand                              No priority                DHW heating
                          Heat generation




                                                     continuous
  Controller




                                                    (DC 0...10 V)
                                                                                MAX                               Heat request, individual
                                                 Heat demand relay                                                  rooms for radiators
                                                                                           Heat demand               Heat request, individual
                                                                                           transformers            rooms for underfloor heating

                                                                                                                                                      Rooms 1...12


         Page 24/34                                                                   Train the Trainer    -    Spring 2008
               Overview                     Functions & Settings    Exercices
Functions and Operation
Functions 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.


                  DHW tank temperature


                DHW setpoint                                                              off

                                                            Switching differentail


                                                                                          on




   Page 25/34                                       Train the Trainer   -   Spring 2008
     Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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.




                                                                                  E      B




                                                           Q1


                                                        Q1: Umlenkventil
                                                       Q1: Diverting valve
   Page 26/34                                      Train the Trainer   -   Spring 2008
     Overview   Functions & Settings   Exercices
Functions and Operation
Functions 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




   Page 27/34                                        Train the Trainer   -   Spring 2008
     Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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 setpoint
  End:                        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.




   Page 28/34                                        Train the Trainer   -   Spring 2008
     Overview   Functions & Settings   Exercices
Functions and Operation
Functions 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.




   Page 29/34                                      Train the Trainer   -   Spring 2008
     Overview   Functions & Settings   Exercices
Functions and Operation
Functions 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).



                                                     E          B                  A: System pump required for
                                                                                       DHW charging
 T
                                          Q                                        B: System pump not required
                                                                                       for DHW charging

                      A                                  B


                            Controller
     Page 30/34                                      Train the Trainer   -   Spring 2008
      Overview    Functions & Settings   Exercices
Functions and Operation
Functions 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.




   Page 31/34                                       Train the Trainer   -   Spring 2008
     Overview   Functions & Settings   Exercices
Functions and Operation
Functions 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.



                                         On
        Heat request
                                         Off

                                         On                               Pump overrun time
                Pump
                                         Off
Note:                                                                                       Time
The overrun time is the same for all pumps (room groups, DHW).




   Page 32/34                                              Train the Trainer   -   Spring 2008
     Overview     Functions & Settings         Exercices
Functions and Operation
Functions 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
                                                                                         B


                                                                                                     T           T

                                                                                                 E
                                                                                         K                   E

                                                              M2


                                                                                             Y           Y
                                                                                  M1




                                                                                                             2707H03

   Page 33/34                                      Train the Trainer   -   Spring 2008
     Overview   Functions & Settings   Exercices
Functions and Operation
Exercises
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.




   Page 34/34                                      Train the Trainer   -   Spring 2008
     Overview   Functions & Settings   Exercices

				
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