CALEFFI iSolar Plus Manual
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CALEFFI iSolar Plus Manual

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Application examples
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Troubleshooting
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  • Page 1 Mounting Connection Application examples Operation Troubleshooting en-US/CA Manual Thank you for buying this product. Read this manual carefully to get the best perfomance from this unit. Please keep this manual carefully.

  • Page 2: Table Of Contents

    Contents General ..............2 System layout 8 ..............24 System-specific functions ..........26 Overview ..............3 System layout 9 ..............28 1. Installation ............4 1.1 Mounting ................4 System layout 10 ............... 30 1.2 Electrical connection ............4 2. Operation and function ........32 1.3 Data communication/ Bus ..........5 2.1 Push buttons...............

  • Page 3: Overview

    ê • User-friendly operation • Housing with outstanding design • HE pump control via adaptor 2.6" Included with the iSOLAR PLUS: 66 mm 1 × iSOLAR PLUS 1 × accessory bag 1 × spare fuse T4A 2 × screws and wall plugs 4 ×...

  • Page 4: Installation

    1. Installation WARNING! Electric shock! 1.1 Mounting Opening the housing will expose display live parts! Î Switch off power supply and discon- nect the device from power supply before opening the housing! The unit must only be installed push button •...

  • Page 5: Data Communication/ Bus

    Connecting the device to the power supply must always be the last step of the installation! The power supply to the controller must be carried out via an external power switch (last step!). The supply voltage must be 100 ... 240 V~ (50 ... 60 Hz). Flexible cables must be attached to the housing with the enclosed strain relief and the corresponding screws.

  • Page 6: Terminal Allocation In The Different System Layouts

    1.4 Terminal allocation in the different system layouts System layout 1 surement purposes. S3 can optionally be used as reference The controller calculates the temperature difference sensor for the store emergency shutdown option (OSEM). between collector sensor S1 and store sensor S2. If the difference is larger than or identical to the adjusted switch- If heat quantity measurement (OHQM) is activated, sensor S4 has to be connected as return sensor.
  • Page 7 Adjustment Channels Channel Description Factory setting Page System DT O Switch-on temperature difference 12.0 °Ra [6.0 K] DT F Switch-off temperature difference 8.0 °Ra [4.0 K] DT S Nominal temperature difference 20.0 °Ra [10.0 K] Rise control R1 4 °Ra [2 K] Minimum pump speed 30 % S MX...

  • Page 8: System Layout 2

    System layout 2 Heat exchange from tank 1 to tank 2 will be operated by The controller calculates the temperature difference bet- relay 2, if the temperature difference between sensors S3 ween collector sensor S1 and tank sensor S2. If the diffe- and S4 is larger than or identical to the adjusted switch-on rence is larger than or identical to the adjusted switch-on temperature difference (DT3O), until the adjusted minimum...
  • Page 9 Adjustment Channels Channel Description Factory setting Page System DT O Switch-on temperature difference 12.0 °Ra [6.0 K] DT F Switch-off temperature difference 8.0 °Ra [4.0 K] DT S Nominal temperature difference 20.0 °Ra [10.0 K] Rise control R1 4 °Ra [2 K] n1MN Minimum pump speed R1 30 %...

  • Page 10: System-Specific Functions

    System-specific functions The following adjustments are used for the specific function in system layout 2. ∆T control for the heat exchange between 2 tanks Reference sensors for this function are S3 and S4. DT3O: Switch-on temperature diff. In system layout 2 the controller is equipped with an addi- Adjustment range: 2.0 ...
  • Page 11 Maximum temperature limitation Minimum and maximum temperature limits can be set for the heat exchange function. The maximum temperature limitation uses sensor 4 as MX3O / MX3F: reference sensor. Maximum temperature limitation Adjustment range: The maximum temperature limitation function provides 30.0 ...

  • Page 12: System Layout 3

    System layout 3 The controller calculates the temperature difference bet- the adjusted thermostat switch-on temperature (AH O) is ween collector sensor S1 and tank sensor S2. If the diffe- reached. This function can optionally be combined with up rence is larger than or identical to the adjusted switch-on to three adjustable time frames.
  • Page 13 Adjustment Channels Channel Description Factory setting Page System DT O Switch-on temperature difference 12.0 °Ra [6.0 K] DT F Switch-off temperature difference 8.0 °Ra [4.0 K] DT S Nominal temperature difference 20.0 °Ra [10.0 K] Rise control R1 4 °Ra [2 K] n1MN Minimum pump speed R1 30 %...

  • Page 14: System-Specific Functions

    The following functions are exclusively available in system System-specific functions layout 3. The corresponding channels will not be available in any other system layout. Thermostat function The thermostat function works independently from the Backup heating solar operation and can be used for using surplus energy or for backup heating.
  • Page 15 Option: Thermal disinfection of the upper DHW zone (OTD) OTD: This function is used for protecting the upper tank zone Thermal disinfection function against Legionella by activating the backup heating. Adjustment range: ON / OFF Reference sensor for the thermal disinfection is S3! Factory setting: OFF Î...

  • Page 16: System Layout 4

    System layout 4 The controller calculates the temperature differences tures (S1MX / S2MX) are reached. The priority logic causes between collector sensor S1 and tank sensors S2 and S3. If priority loading of the upper zone of the tank, if possible. the differences are larger than or identical to the adjusted The 3-way-valve will be operated by relay 2 then.
  • Page 17 Adjustment Channels Channel Description Factory setting Page System Minimum pump speed 30 % DT1O Switch-on temperature difference 1 12.0 °Ra [6.0 K] DT1F Switch-off temperature difference 1 8.0 °Ra [4.0 K] DT1S Nominal temperature difference 1 20.0 °Ra [10.0 K] RIS1 Rise control R1 4 °Ra [2 K]...

  • Page 18: System Layout 5

    System layout 5 The controller calculates the temperature differences S2MX) are reached. The priority logic causes priority loading between collector sensor S1 and tank sensors S2 and S3. If of tank 1, if possible. For loading tank 2 the 3-way-valve will the differences are larger than or identical to the adjusted be operated by relay 2.
  • Page 19 Adjustment Channels Channel Description Factory setting Page System Minimum pump speed 30 % DT1O Switch-on temperature difference 1 12.0 °Ra [6.0 K] DT1F Switch-off temperature difference 1 8.0 °Ra [4.0 K] DT1S Nominal temperature difference 1 20.0 °Ra [10.0 K] RIS1 Rise control R1 4 °Ra [2 K]...

  • Page 20: System Layout 6

    System layout 6 The controller calculates the temperature differences tank temperatures (S1MX / S2MX) are reached. The priority between collector sensor S1 and tank sensors S2 and S3. If logic causes priority loading of the selected tank (PRIO), if the differences are larger than or identical to the adjusted possible.
  • Page 21 Adjustment Channels Channel Description Factory setting Page System DT1O Switch-on temperature difference 1 12.0 °Ra [6.0 K] DT1F Switch-off temperature difference 1 8.0 °Ra [4.0 K] DT1S Nominal temperature difference 1 20.0 °Ra [10.0 K] RIS1 Rise control R1 4 °Ra [2 K] n1MN Minimum pump speed R1 30 %...

  • Page 22: System Layout 7

    System layout 7 The controller calculates the temperature differences temperature difference (DT F) or the maximum tank tem- between the collector sensors S1 and S3 and the tank perature (S MX) is reached. sensor S2. If the differences are larger than or identical to Sensor S4 can optionally be connected for measurement purposes or used as reference sensor for the tank emer- the adjusted switch-on temperature difference (DT O), the...
  • Page 23 Adjustment Channels Channel Description Factory setting Page System DT O Switch-on temperature difference 12.0 °Ra [6.0 K] DT F Switch-off temperature difference 8.0 °Ra [4.0 K] DT S Nominal temperature difference 20.0 °Ra [10.0 K] Rise control R1 / R2 4 °Ra [2 K] n1MN Minimum pump speed R1...

  • Page 24: System Layout 8

    System layout 8 The controller calculates the temperature difference bet- A solid fuel boiler will be operated by relay 2, if the tempera- ween collector sensor S1 and tank sensor S2. If the diffe- ture difference between sensors S4 and S3 is larger than or rence is larger than or identical to the adjusted switch-on identical to the adjusted switch-on temperature difference temperature difference (DT O), the solar pump will be...
  • Page 25 Adjustment Channels Channel Description Factory setting Page System DT O Switch-on temperature difference 12.0 °Ra [6.0 K] DT F Switch-off temperature difference 8.0 °Ra [4.0 K] DT S Nominal temperature difference 20.0 °Ra [10.0 K] Rise control R1 4 °Ra [2 K] n1MN Minimum pump speed R1 30 %...

  • Page 26: System-Specific Functions

    System-specific functions The following adjustments are used for the specific functions in system layout 8. Reference sensors for this function are S4 and S3. ∆T control for backup heating by solid fuel boiler In system layout 8, the controller is equipped with an ad- DT3O: ditional differential control for heat exchange from a solid Switch-on temperature diff.
  • Page 27 Maximum temperature limitation Minimum and maximum temperature limits can be set for the solid fuel boiler. MX3O / MX3F: The maximum temperature limitation function provides a Maximum temperature limitation maximum tem perature setting, usually to reduce scald risk Adjustment range: in a storage tank.

  • Page 28: System Layout 9

    System layout 9 The controller calculates the temperature difference bet- A heating circuit return preheating will be operated by ween collector sensor S1 and tank sensor S2. If the diffe- relay 2, if the temperature difference between sensors S3 rence is larger than or identical to the adjusted switch-on and S4 is larger than or identical to the adjusted switch-on temperature difference (DT O), the solar pump will be temperature difference (DT3O).
  • Page 29 Adjustment Channels Channel Description Factory setting Page System DT O Switch-on temperature difference 12.0 °Ra [6.0 K] DT F Switch-off temperature difference 8.0 °Ra [4.0 K] DT S Nominal temperature difference 20.0 °Ra [10.0 K] Rise control R1 4 °Ra [2 K] Minimum pump speed 30 % S MX...

  • Page 30: System Layout 10

    System layout 10 The controller calculates the temperature difference bet- will be operated by relay 2 in order to direct the surplus ween collector sensor S1 and tank sensor S2. If the diffe- energy to a heat dump. For security purpose this will be carried out only if the tank temperature is below the non- rence is larger than or identical to the adjusted switch-on temperature difference (DT O), the solar pump will be...
  • Page 31 Adjustment Channels Channel Description Factory setting Page System DT O Switch-on temperature difference 12.0 °Ra [6.0 K] DT F Switch-off temperature difference 8.0 °Ra [4.0 K] DT S Nominal temperature difference 20.0 °Ra [10.0 K] Rise control R1 4 °Ra [2 K] Minimum pump speed 30 % S MX...

  • Page 32: Operation And Function

    2. Operation and function The controller is operated via three push buttons below the display. 2.1 Push buttons Button 1 is used for scrolling forward through the indication menu or to increase the adjustment values. Button 2 is used for scrolling backward and reducing values. Button 3 is used for selecting channels and confirming adjustments.

  • Page 33: Flashing Codes

    System screen The system screen (active system layout) shows the system selected on the controller. It consists of several system component symbols, which are – depending on the current status of the system – either flashing, permanently shown or hidden. system screen tank sensor sensors...

  • Page 34: Commissioning

    3. Commissioning Î Establish the power supply During a short initialization phase, the operating control lamp flashes red and green. When the controller is commissioned for the first time or after a reset, it will run a commissioning menu. The commissioning menu leads the user through the most important adjustment channels needed for operating the (OK)
  • Page 35 Arr: 4. System layout System layout selection Î Adjust the desired system layout of your solar thermal Adjustment range: 1 ... 10 system Factory setting: 1 For a detailed description of the different system layouts selectable, see chapter 1.4. Overview of system layouts: Arr 1 Arr 2 Arr 1 : standard solar system layout...
  • Page 36 S MX / S1MX / S2MX: 5. Maximum tank temperature Maximum tank temp. Î Adjust the desired maximum tank temperature Adjustment range: 40 ... 200 °F [4 ... 95 °C] Note: Arr 10: The controller is also equipped with a non- 40 ...

  • Page 37: Channel Overview

    4. Channel overview 4.1 Display channels Note: The displayed values and adjustment channels depend on which system layout, which options and functions have been selected. Only values and adjustment channels available for the indivi- Indication of drainback time periods dual settings selected will appear in the menu. Initialization Indicates the time adjusted in tDTO, running backwards.
  • Page 38 Indication of current pump speed Indicates the current pump speed of the corresponding pump. n %, n1 %, n2 %: • n % : current pump speed (1-pump system) Current pump speed • n1 % : current pump speed pump 1 Display range: 30 ...

  • Page 39: Adjustment Channels

    4.2 Adjustment channels In this channel, a pre-defined system layout can be selected. System layout selection Each system layout has a set of pre-programmed settings Arr: that can be individually changed. System layout selection. If the system layout selection is changed later on, all adjust- Adjustment range: 1 ...
  • Page 40 Maximum tank temperature Once the adjusted maximum temperature is exceeded, S MX / S1MX / S2MX: the solar pump is switched off and further loading of the Maximum tank temp. tank is prevented to reduce scald risk or system damage. A Adjustment range: fixed hysteresis of 4 °Ra [2 K] is set for the maximum tank 40 ...
  • Page 41 Cooling functions In the following the three cooling functions – collector cooling, system cooling and tank cooling – are described in detail. The following notes are valid for all three cooling functions: Note: The cooling functions will not become active as long as solar loading is possible.
  • Page 42 Tank cooling function When the tank cooling function is activated, the controller aims to cool down the tank during the night in order to OSTC: prepare it for solar loading on the following day. Tank cooling option If the adjusted maximum tank temperature (S MX / S1MX) Adjustment range: OFF / ON is exceeded and the collector temperature falls below the Factory setting: OFF...
  • Page 43 If a multi-tank system layout has been chosen, the priority The D e lt a S o l BS Plus priority logic ® logic determines how the heat is divided between the Note: tanks. Different types of priority logic are adjustable: Priority logic can be used in multi-tank system •...
  • Page 44 Evacuated tube collector function O TC: This function helps overcome the disadvantages caused by Evacuated tube collector the non-ideal sensor position with some tube collectors. function This function operates within an adjusted time frame (be- Adjustment range: OFF / ON ginning at TCST and ending at TCEN).
  • Page 45 Drainback option Note: A drainback system permits the heat transfer fluid to drain A drainback system layout requires additional back into the holding tank when solar energy is not coll- components such as a holding tank. The ected. The drainback option will initiate the filling of the drainback option should only be activated if all system when solar loading begins.
  • Page 46 Operating mode For control and service work, the operating mode of the controller can be manually adjusted. For this purpose, select MAN1 / MAN2: the adjustment value MAN1, MAN2 in which the following Operating mode adjustments can be made: Adjustment range: OFF, Auto, ON •...

  • Page 47: Troubleshooting

    5. Troubleshooting fuse In the case of an error, a message is shown on the display of the controller: DE-45527 Hattingen 100 ... 240 V~ DeltaSol BS Plus V2 50-60 Hz Made in Germany CU 72091163 01 Warning symbols IP 20 1 (1) A ( 100 ...

  • Page 48: Various

    5.1 Various Pump is overheated, but no heat transfer from the Pump starts for a short moment, switches off, switches collector to the tank, flow and return have the same tem- on again, etc. perature; perhaps also air / gas bubbles in the lines. Air in the system? Temperature difference Air in the system;...
  • Page 49 Tanks cool down at night Control the non-return Further pumps which are valve in warm water cir- connected to the solar culation - o.k. tank must also be che- cked. Collector circuit pump runs during the night? Check controller: Manual operation active? Clean or replace it The thermosiphoning in Tube collector function...

  • Page 50: Accessories

    6. Accessories Sensors Our product range includes high-precision platinum temperature sensors, flatscrew sensors, outdoor temperature sensors, indoor temperature sensors, cylindrical clip-on sensors, also as complete sensors with immersion sleeve. For more information, see our catalogue and price list. Overvoltage protection device In order to avoid overvoltage damage at collector sensors (e.g.
  • Page 51 DL2 Datalogger This additional module enables the acquisition and storage of large amounts of data (such as measuring and balance values of the solar system) over a long period of time. The DL2 can be configured and read-out with a standard internet browser via its integrated web interface.

  • Page 52: Impressum

    Another use outside the copyright requires the please note: Your own calculations and plans, under con sider- approval of CALEFFI NORTH AMERICA, Inc.. This especial- ation of the current standards should only be basis for your ly applies for copies, translations, microfilms and the storage into electronic systems.

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