Synco™ KNX bus communications Device range Synco 700, Synco ...
Synco living Train the Trainer Functions and Operation DHW Heating Spring 2008
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Transcript of Synco living Train the Trainer Functions and Operation DHW Heating Spring 2008
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OverviewFunctions & SettingsExercices
Synco living
Train the Trainer
Functions and OperationDHW Heating
Spring 2008
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OverviewFunctions & SettingsExercices
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
SFH
MFH
KNX TP1
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Functions and OperationOverview DHW II
Primary DHW heatingWith central apartment unit With Synco controller
KNX TP1 KNX TP1
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Functions and OperationOverview DHW III
KNX TP1
Remote controlMain menu > Commissioning > DHW > Operation external DHW > . . .
Yes, without time switchYes, with time switch
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
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Functions and OperationOverview DHW IV
DHW control with charging pump
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Functions and OperationOverview DHW V
DHW control with diverting valve
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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).
Actual value of DHW temperature
Required DHW setpoint
Validity positioning signals(Temp Req) without discharge protection
Common flow temperature
Charging pump / diverting valve
Overrun60 s
Overrun60 s
Validity positioning signals(Temp Req) with discharge protection
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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
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Functions and OperationFunctions and Settings
The following functions and settings are available:Holidays / special daysManual forced chargingDHW operating modeOperating mode absenceOperating mode contact7-day time switchLegionella functionChangeover electric immersion heaterSupervision of the DHW temperatureDHW prioritySwitching differentialCharging time maximumForced chargingSetpoint increase DHW chargingSystem pumpSummer operation electric immersion heaterOverrun time DHW charging pump / diverting valveLocking and forced signals
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Functions and OperationFunctions and Settings
Holidays / special daysMain 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 08.00End: 31.05.2007 17.00Reason: Holidays*: Every year on the same date
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Functions and OperationFunctions and Settings
Holidays / special daysFor DHW heating, the operating mode can be selected:Main menu > Holidays/special days > DHW operating mode holidays > …
NormalReducedProtection
Note:If “Holidays“ and “Absence“ are active at the same time, DHW heating maintains the DHW temperature level set for the holiday period.
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Functions and OperationFunctions and Settings
Manual forced chargingMain menu > DHW > Operating mode > Forced charging manual > …
NoYes
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.
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Functions and OperationFunctions and Settings
DHW / ventilation buttonThe following functions are assigned to the DHW / ventilation button:
DHW configured Ventilation configured
No No None
Yes NoDHW:Short press: Extended press:
DHW operating modeManual DHW push
No YesVentilation:Short press: Extended press:
Stage selectorForced ventilation
Yes Yes
Selection list:Short press: Extended press:
DHW operating mode Stage selectorManual DHW forced charging Forced ventilation
Button function
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Functions and OperationFunctions and Settings
DHW operating mode / setpointsMain 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 setpoint.
5°C
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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:
AutoNormalReducedProtection
The current DHW operating mode can be viewed on the central apartment unit under:Main menu > DHW > Operating mode > State > …
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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 > …
NormalReducedProtection
AbsencePartly monitored
Switch from Normal to Reduced
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Functions and OperationFunctions and Settings
Operating mode contactThe 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)NormalReducedProtection
Change from Normal to Reduced
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Functions and OperationFunctions and Settings
7-day time switchMain 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.
NormalReduced
0 6 12 18 24
Normal
Reduced
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Functions and OperationFunctions and Settings
DHW stateThe current DHW state can be read off at the central apartment unit:
Main menu > DHW > DHW state> … Actual value of DHW temperatureDHW temperature setpointCharging pump (on/off)Electric immersion heaterPlant operation (ready/charging)Cause (commissioning/frost/legionella function/time switch)Charging time limit (inactive/active)
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Functions and OperationFunctions and Settings
Legionella functionThe 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).
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Functions and OperationFunctions and Settings
Legionella function
2 K
Actual value DHW temperature
EndStart
Duration legionella function
Start Reset
1 K
DHW request
Status LegioFcn
Start LegioFcn(day / time of day)
Normal setpoint
Legio protection setpoint
DHW SD
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Functions and OperationFunctions and Settings
Changeover to electric immersion heaterMain menu > DHW > Settings > Changeover electric immersion heater > …
How shall DHW be produced during summer operation?YesIn summer operation, the DHW storage tank is charged with the help of the electric immersion heaterNoIn summer operation, a heat source is required for charging the DHW storage tank
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Functions and OperationFunctions and Settings
Supervision of the DHW temperatureMain 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.
Fault status message:Temperature fell below
limit value
1 K 1 K
Min. temperature alarm Max. temperature alarm
Fault status message:Temperature exceeded limit value
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Functions and OperationFunctions and Settings
DHW priorityMain menu > DHW > Settings > Priority > . . .
None (DHW request)Heating control is not affected by DHW chargingAbsolute (DHW request)DHW charging is given priority. During DHW charging, the apartment pump is deactivated
MAX
Heat demand continuous
(DC 0...10 V)
Heat demand relay
Heat requestDHW heating
Heat request, individualrooms for radiators
Heat demandtransformers
Heat request, individualrooms for underfloor heating
BE
Q
Rooms 1...12
He
at g
ene
ratio
n
Absolut priority
No priority
Co
ntro
ller
only DHW pump DHW & heating pump
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Functions and OperationFunctions and Settings
Switching differentialMain 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 setpoint off
on
DHW tank temperature
Switching differentail
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Functions and OperationFunctions and Settings
Maximum charging timeMain 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
BE
Q1: UmlenkventilQ1: Diverting valve
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Functions and OperationFunctions and Settings
Forced charging via QAX910When shall automatic forced charging take place?
Main menu > DHW > Settings > Forced charging > . . .NeverForced charging is deactivated. However, activation of forced charging via the central apartment unit‘s DHW button is still possibleWith 1st change to normalForced charging takes place when, for the first time that day, the Reduced setpoint changes to the Normal setpointWith every change to normal Forced charging takes place every time the Reduced setpoint changes to the Normal setpoint
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Functions and OperationFunctions and Settings
Forced charging via QAX910Forced 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.
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Functions and OperationFunctions and Settings
Setpoint increase DHW chargingMain 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.
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Functions and OperationFunctions and Settings
System pumpMain menu > DHW > Settings > System pump required > …
YesNo
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
TTT
BE
Q
A B
Controller
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Functions and OperationFunctions and Settings
Summer operation with electric immersion heaterIt 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 switchThe time switch has no impact on the control of the electric immersion heater in the summer. The DHW is constantly controlled to the Normal setpointWith time switchThe 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.
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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).
OnOff
OnOff
Time
Heat request
PumpPump overrun time
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Functions and OperationFunctions and Settings
Locking signals and forced signalsSpace 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.
K
Y Y
2707H03
M1
B
EE
T T
M2
Apartment pump M1 offDHW pump M2 on
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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.