How is the electric heating element for the water tank controlled? Via the controller? Is it necessary to have different modes of operation for peak/off-peak hours?

The electrical resistance integrated in solar storage tanks usually works via an integrated thermostat and is independent of the regulation.

It is not necessary to install a peak/off-peak operation device, however it can allow you to pay less for your electricity (by using the resistance only during the night - i.e. in off-peak hours - for example).

Furthermore, using the electric resistance only at night has the advantage of giving priority to the heating of the balloon by the solar panels during the day. This allows you to take better advantage of the solar panels.

* IMPORTANT NB 
We would like to remind you of the special features that the solar storage tanks of DualSun systems must comply with:

What hot water tanks should be used with DualSun panels?

 

The "DualSun SLL" solar controller allows the electrical resistance of the hot water tank to be controlled more precisely by means of three programmable time slots in the controller.

 

3321_hpr.png

(1) : Coupling with single-phase 230V resistance

(2) : Coupling with three-phase 400V resistance

(3) : Set relay R2 onto ONOF into solar controller 

 

How to carry out the installation?

  • Place a PT1000 temperature sensor in the immersion sleeve at the top of the hot water cylinder and wire it to terminal strip S3 of the solar controller.

 

  • Wire an auxiliary power relay as shown in the diagram above:

For 230V single-phase electric resistance (case 1 in diagram above)

Install a single-phase NO-NF - 20A relay with: 

    • Terminal A1 = Terminal R2 of the SLL regulation
    • Terminal A2 = Terminal N of the SLL regulation
    • 1 NO contact - 20A (normally open):
      • Terminal (1) = Mains phase
      • Terminal (2) = To resistor phase*
    • 1 NC contact - 20A (normally closed):
      • Terminal (3) = Do not wire
      • Terminal (4) = Do not wire
    • *Wire neutral resistance to mains neutral

 

For 400V three-phase electric resistance (case 2 in diagram above):

Install a three-phase relay NO - 40A with:

    • 4 NO contacts - 40A (normally open)
      • Terminal A1 = Terminal R2 of the SLL regulation
      • Terminal A2 = Terminal N of the SLL regulation
      • Terminal (1) = Phase L1 Mains
      • Terminal (2) = To phase resistance L1*
      • Terminal (3) = Phase L2 Mains
      • Terminal (4) =To phase resistance L2*
      • Terminal (5) = Phase L3 Mains
      • Terminal (6) = To phase resistance L3*
      • Terminal (7) = Do not wire
      • Terminal (8) = Do not wire
      • *Wire neutral resistance to mains neutral

How do I set up the solar control SLL?

  • Set system parameter (SYS) = 3
    • Long press on validation key Touche_validation.PNG
    • Turn the rotary actuator Actionneur_rotatif.png to SYS
    • Activate the parameter change by pressing the Enter key once Touche_validation.PNG
    • Turn the rotary actuator Actionneur_rotatif.png to choose the system number (n°3)
    • Confirm your choice with the confirmation key Touche_validation.PNG
    • Escape key to return to the menu Touche_Echap.PNG

 

  • Setting the auxiliary heating menu (AH)

Use of relay R2 with thermostat function taking the probe S3 as reference and with time range to be defined.

    • Long press on validation key Touche_validation.PNG
    • Turn the rotary actuator Actionneur_rotatif.png to AH
    • Activate the change of parameters by pressing the Enter key once Touche_validation.PNG
    • Turn the rotary actuator Actionneur_rotatif.png to set the parameters
    • Confirm your choice with the confirmation key Touche_validation.PNG
    • Settings:
      • AH0 = 45*
      • AHF = 60

*If you need to ensure a better hot water comfort, increase the activation setpoint temperature.

 

Examples of hourly programming according to the household's hot water consumption profile, shower in the evening or in the morning:

Evening:

      • t1O = 16.00
      • t1F = 23.00

Morning:

      • t1O = 02.00
      • t1F = 08.00
    • Escape key to return to the menu Touche_Echap.PNG

 

  • Set relay 2 on ONOF in the relay menu (REL)
    • Long press on validation key Touche_validation.PNG
    • Turn the rotary actuator Actionneur_rotatif.png to REL
    • Activate the change of parameter by pressing the Enter key once Touche_validation.PNG
    • Turn the rotary actuator Actionneur_rotatif.png to choose relay R2
    • Activate the change of R2 parameter by pressing the Enter key once Touche_validation.PNG
    • Turn the rotary actuator Actionneur_rotatif.png to choose ONOF
    • Confirm your choice with the Enter key Touche_validation.PNG
    • Escape key to return to the menu Touche_Echap.PNG
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