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

/34 Train the Trainer - Spring 2008

OverviewFunctions & SettingsExercices

Synco living

Train the Trainer

Functions and OperationDHW Heating

Spring 2008



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



Functions and OperationOverview DHW II

Primary DHW heatingWith central apartment unit With Synco controller

KNX TP1 KNX TP1



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



Functions and OperationOverview DHW IV

DHW control with charging pump



Functions and OperationOverview DHW V

DHW control with diverting valve



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



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



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




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




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.




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.




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




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




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 > …




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




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




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




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)




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).




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




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




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




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




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




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




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




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.




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.




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




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.




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




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



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.

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