Soller Euroster 813 User Manual

Introduction

The Soller Euroster 813 is a DIN-rail mount solar controller designed for domestic water heating systems. It functions as a differential temperature controller, managing solar collectors and up to two storage tanks based on the selected operating mode. The controller can also manage an auxiliary heating element (boiler or electric) to provide supplementary heat, with users able to program a time schedule for its automatic start and stop. The unit offers four operating modes, incorporating preventive measures to avoid errors during mode selection. The LCD displays graphics illustrating each mode.

Graphic Descriptions to Operation Logic in Each of 4 Operating Modes

The following describes the operational logic for the four modes:

• Normally Closed: Operation is closed before setpoint/limitation.
• Normally Opened: Operation is open before setpoint/limitation.

Mode-1: 2 Sensor Operation with 1 Storage Tank

Uses two sensors: S1 (Solar collector temperature sensor) and S2 (Lower storage tank temperature sensor).

Operating Modes Details

Mode-2: 3 Sensor Operation with Auxiliary Heater

Uses three sensors: S1 (Solar collector temperature sensor), S2 (Lower storage tank temperature sensor), and S3 (Thermostatic sensor). Controls an auxiliary heater.

Mode-3: 3 Sensor Operation with Auxiliary Boiler

Uses three sensors: S1 (Solar collector temperature sensor), S2 (Lower storage tank temperature sensor), and S3 (Thermostatic sensor). Controls an auxiliary boiler.

Mode-4: 3 Sensor Operation with 2 Storage Tanks

Uses three sensors: S1 (Solar collector temperature sensor), S2 (Lower storage tank temperature sensor), and S3 (Differential temperature sensor). Manages two storage tanks.

Control Logic and Wiring

The controller's logic is explained through graphic descriptions. The front panel features a display showing settings like Actual Temp. Set, AT S1-S2-S3, Clock Timer, Hysteresis, Mode, Offset, and Hi. Lo. Limits. Input buttons include +, -, OK, and Reset. Indicator LEDs show Output A (Red) and Output B (Green) status.

Wiring Diagram

The wiring diagram illustrates connections for the solar collector sensor S1 (PT1000), lower storage tank sensor S2 (NTC 10kΩ), and thermostatic or differential temperature sensor S3 (NTC 10kΩ). It also shows connections for Output A (Load A) and Output B (Load B), and the main power input (100-240Vac, 50-60 Hz).

Technical Specifications

• Operating voltage: 100 ~ 240 V AC 50/60 Hz
• Output rating: Output A (Solar collector circulation Pump): Volt output, 7 Amp \ 250 V AC. Output B (Auxiliary heating): Volt output, 16 Amp \ 250 V AC.
• Power consumption: 4 VA
• Clock format: 12H/24H selectable, default 24H.
• Temperature units: °C/°F selectable, default °C. Includes built-in protective functions.
• Anti-seizing protection: Automatic operation; Output A turns on for 5 seconds daily at midnight (00:00) if night temperature is below 15°C.
• Overheating protection: Automatic operation; when activated, the backlight and display flash synchronously.

Protection and Settings

Overheating Protection

In the solar collector:

• Modes 1/2/3: Output A turns ON when S1 temperature ≥ S1 Hi temp. limits setpoint AND S2 temperature ≤ (S2 Hi temp. limits setpoint - 2°C). Output A turns OFF when S1 temperature ≤ (S1 Hi temp. limits setpoint - 5°C) AND S2 ≤ S2 Hi temp. limits setpoint.
• Mode 4: Output A&B turn ON when S1 temperature ≥ S1 Hi temp. limits setpoint AND S2 temperature ≤ (S2 Hi temp. Limits setpoint - 2°C). Output A&B turn OFF when S1 temperature ≤ (S1 Hi temp. limits setpoint - 5°C) AND S2 temperature ≤ (S2 Hi temp. Limits setpoint - 2°C).

In the storage tank:

• Modes 1/2/3: Output A turns ON when S2 temperature ≥ S2 Hi temp. limits setpoint AND S1 temperature ≤ (S1 Hi temp. limits setpoint - 5°C). Output A turns OFF when S2 temperature ≤ (S2 Hi temp. limits setpoint - 2°C) AND S1 temperature ≤ S1 Hi temp. limits setpoint.
• Mode 4: Output A&B turn ON when S2 temperature ≥ S2 Hi temp. limits setpoint AND S1 temperature ≤ (S1 Hi temp. limits setpoint - 5°C). Output A&B turn OFF when S2 temperature ≤ (S2 Hi temp. limits setpoint - 2°C) AND S1 temperature ≤ S1 Hi temp. limits setpoint.

Anti-frost Protection

Active when the unit is ON. Output A turns on for 1 minute every hour when S1 temperature = 5°C. Output A remains ON when S1 temperature = 2°C, until S1 > 5°C. This function can be enabled or disabled; default setting is OFF.

Temperature Setpoints

• Hi. Temp. Limits (Overheating Protection): S1: 60°C to 190°C (default 120°C). S2: 0°C to 100°C (default 95°C).
• Lo Temp. Limits (Lowest Temperature Protection for S1): Output A shuts off when S1 temperature is lower than the set limit. Range: 10°C to 40°C (default 15°C).

Differential Setpoints (ΔT)

• ΔT S1-S2 (Circulation Pump Control):
  • ON: Minimum temperature difference between S1 and S2 to turn ON Output A. Range: 3~20°C (default 10°C).
  • OFF: Minimum temperature difference between S1 and S2 to turn OFF Output A (prevents reverse circulation). Range: 1~18°C (default 3°C).
• ΔT S2-S3 (Circulation Pump Control for Mode-4 only):
  • ON: Minimum temperature difference between S2 and S3 to turn ON Output B. Range: 3~20°C (default 10°C).
  • OFF: Minimum temperature difference between S2 and S3 to turn OFF Output B. Range: 1~18°C (default 3°C).

S2 & S3 Setpoints and Hysteresis

These setpoints provide thermostatic operation for maintaining water temperature in storage tanks. S2 controls Output A, and S3 controls Output B.

• S2 Setpoint: 10°C to 100°C (default 60°C).
• S2 Switching Differential (Hysteresis): 1°C to 20°C (default 2°C).
• S3 Setpoint: 10°C to 100°C (default 60°C).
• S3 Switching Differential (Hysteresis): 1°C to 20°C (default 10°C for modes 2/3; default 2°C for mode 4).

Timer Function

Active in operating modes 2 or 3 for ON/OFF control of Output B (S3) based on time setpoints. Supports 2 ON-OFF periods per day with 10-minute resolution. Default setting is OFF.

Temperature Sensor Cable Specifications

• Collector Sensor S1 (PT1000): 1kΩ at 0°C, Temp. Coefficient 3.9x10⁻³ /°C. Resistance variable rate 0.385Ω/°C. Display range: -40~ +250°C / -40~482°F. Accuracy: ±0.5°C / 1.0°F. Cable length: 2 meters, thermal-resistive PTFE shielding.
• Tank Sensor S2 (NTC): 10kΩ at 25°C. Display range: -10 ~ +110°C / -14 ~ 230°F. Accuracy: ±0.5°C / 1.0°F. Cable length: 1.5 meters, thermal-resistive PTFE shielding.
• Tank Sensor (Thermostatic) S3 (NTC): 10kΩ at 25°C. Display range: -10 ~ +110°C / -14 ~ 230°F. Accuracy: ±0.5°C / 1.0°F. Cable length: 1.5 meters, thermal-resistive PTFE shielding.

Temperature Sensor Calibration

Offset: Adjustable range for all sensors: -10°C ~ +10°C (default 0°C).

Other Features

• Rechargeable Battery: Retains settings and time during power outages.
• Stand-By Mode: Allows manual ON/OFF control of Output A&B.
• Key-lock Function: Locks all buttons to prevent tampering.
• Anti-Legionella Function: For auxiliary heating (Output B) in modes 2/3. Operates manually to heat water to a setpoint (60°C to 90°C, default 70°C) for a specific duration to prevent Legionella bacteria growth.
• LCD: Blue backlit, auto mode 10 seconds.
• Dimensions: 52.5mm (W) x 85.0mm (H) x 60.0mm (D). Designed for 35 mm DIN-rail mounting.

Mounting Instructions

Surface-Mount Installation

The unit features a retractor on the back for mounting. Follow these steps:

1. Insert a flat-head screwdriver into the indicated position.
2. Tilt the screwdriver to push down the retractor.
3. Mount the provided surface-mount bracket on the wall.
4. Align the top of the unit's back plastic housing with the top of the bracket.
5. Push down the retractor and mount the unit.
6. To remove, push down the retractor to release the unit from the bracket.

DIN-rail Mount Installation

Follow these steps for DIN-rail mounting:

1. Align the top of the unit's back plastic housing with the top of the DIN-rail.
2. Push down the retractor and mount the unit.
3. To remove, push down the retractor to release the unit from the DIN-rail.

Operation and Settings Adjustment

It is recommended to read the specifications thoroughly before adjusting settings. The unit has preventive measures against errors during mode selection. If an error occurs, "Err" will be displayed on the LCD. To restart setting/adjusting after an error, press Reset or press + and - together for 5 seconds. Press Reset before initial setup.

During the setting/adjusting procedure, if no input is received for 1 minute, the unit automatically retains settings and starts operating.

Setting/Adjusting Procedures

A. Set/Adjust the Clock:

1. Press + or - to set the Hour.
2. Press OK to set the Minutes.
3. Press + or - to set the Minutes.
4. Press OK to proceed to the next setting.

B. Anti-frost Protection A-F: Refer to Specification Item-8 for details. Press + or - to choose Enable (ON) or Disable (OFF).

C. Set/Adjust the Required Operating Mode: Refer to the Introduction. Press + or - to choose the mode, then press OK to proceed.

C1. Hi Limits S1: Refer to Specification Item-7 & 9. Press + or - to choose the setpoint, then press OK.

C-2. Lo Limits S1: Refer to Specification Item-10. Press + or - to choose the setpoint, then press OK.

C-3. Hi Limits S2: Refer to Specification Item-7 & 9. Press + or - to choose the setpoint, then press OK.

D. ΔT S1-S2 ON and OFF Setpoints: Refer to Specification Item-11.

1. Press + or - to choose the ON setpoint.
2. Press OK to proceed.
3. Press + or - to choose the OFF setpoint.
4. Press OK to proceed.

E. ΔT S2-S3 ON and OFF Setpoints (Mode-4 only): Refer to Specification Item-12.

1. Press + or - to choose the ON setpoint.
2. Press OK to proceed.
3. Press + or - to choose the OFF setpoint.
4. Press OK to proceed.

F. Set/Adjust Operation Setpoint and Hysteresis in S2 (Output A): Refer to Specification Item-13.

1. Press + or - to choose the setpoint.
2. Press OK to go to the Hysteresis setpoint.
3. Press + or - to choose the Hysteresis setpoint.
4. Press OK to proceed.

G. Set/Adjust Operation Setpoint and Hysteresis in S3 (Output B, Modes 2/3/4): Refer to Specification Item-13.

1. Press + or - to choose the S3 point.
2. Press OK to go to the Hysteresis setpoint.
3. Press + or - to choose the Hysteresis setpoint.
4. Press OK to proceed.

H. Offset - Temperature Sensor Calibration: Refer to Specification Item-15/16.

1. Press + or - to choose the calibration value in S1.
2. Press OK for calibration in S2.
3. Press + or - to choose the required value.
4. Press OK for calibration in S3.
5. Press + or - to choose the required value.
6. Press OK to set the next setting.

I. Timer Function: Refer to Introduction and Specification Item-14. For setting the Timer, press and hold + for fast forward and hold - for fast backward.

1. Press OK to enable the Timer function and choose ON/OFF time for each program.
2. Press + or - to choose the time for P-1 ON.
3. Press OK to set the P-1 OFF time.
4. Press + or - to choose.
5. Press OK to set the P-2 ON time.
6. Press + or - to choose.
7. Press OK to set the P-2 OFF time.
8. Press + or - to choose.
9. Press OK to go to the next setting.

All internal settings are completed by pressing + to start operation. When the unit is operating, press + or - to check the temperature of each sensor.

Stand-by Mode

1. Press OK.
2. A flashing "YES" will show on the LCD.
3. Press OK again.
4. The unit is now manually turned off.

Remark: When the unit is manually turned off, built-in protective functions will be automatically activated. Refer to Specification Item-6 for Anti-seizing protection details.

When the unit is operating in stand-by mode, pressing the OK button will resume its operation.

Standby, Reset, and Troubleshooting

Error Indications

The LCD backlight flashes to alert users in two situations:

1. Overheating Protection: The LCD will display an overheating indication.
2. Sensor Fault: If a temperature sensor is not properly connected or is damaged, the LCD will display "Err".

In case of sensor fault, the symbol [warning-symbol] on the LCD will flash synchronously. Contact service personnel immediately if this occurs.

Anti-Legionella Function

This function is active only in systems with auxiliary heating devices (modes 2 or 3). Refer to Specification Item-20 for details.

1. Press and hold OK for 5 seconds.
2. Press + or - to set the required temperature setpoint for this hygienic function.
3. Press OK to start the function.

During operation, the LCD will show "A-L" and the S3 temperature. Pressing OK again will stop the operation. The unit will resume normal operation after the anti-legionella function completes.

Anti-Legionella Failure

If the temperature at S3 does not reach the required A-L setpoint within one hour, the backlight flashes to alert users that the function has failed. The display will alternately show "Err" and "A-L" with the current temperature.

Press OK to stop this A-L operation and contact service personnel.

Test Mode

Used to check the condition and readiness of Output A and Output B (Output A only in mode-1).

1. Press and hold OK, then press +.
2. Slow flashing "Output A" will be shown on the LCD.
3. Press + to turn on Output A.
4. If Output A is good, a fast flashing [check-mark-symbol] will be shown on the LCD, and the red LED on the top right corner will turn on. (Unit may be damaged if this does not occur).
5. Press OK to turn off the test on Output A.
6. Press OK to test Output B.
7. Slow flashing "Output B" (or S3 in mode-2) will be shown on the LCD.
8. Press + to turn on Output B.
9. If Output B is good, a fast flashing [check-mark-symbol] will be shown on the LCD, and the green LED on the top right corner will turn on. (Unit may be damaged if this does not occur).
10. Press OK to turn off the test on Output B.
11. After testing, press and hold OK and then press + to start operation.

Resume Default Settings

Press OK and Reset together. "dEL" will appear on the LCD. All default settings will be restored, but the time will be retained.

Reset

Pressing Reset retains previous settings but erases the time setting.

Key-Lock Function

Press OK and - together. A [lock-symbol] will appear on the LCD. All data input through the panel buttons becomes invalid. To release key-lock, press OK and - together again.

Declarations and Warranty

Simplified Declaration of EU Conformity

P.H.P.U. AS Agnieszka Szymańska-Kaczyńska declares that the Euroster 813 equipment conforms to directives 2014/35/EU (LVD), 2014/30/EU (EMC), and 2011/65/EU (RoHS). The complete text is available at: www.euroster.pl.

Electronic Waste Management Information

This product is designed with high-quality materials for reuse. The [waste-bin-symbol] symbol indicates selective collection in accordance with Directive 2012/19/EU. It contains an internal battery subject to Directive 2006/66/EC. Electrical and electronic equipment and batteries must not be disposed of with household waste. Users must take used devices and batteries to designated collection points. Proper disposal prevents hazardous consequences to health and nature. Households play a crucial role in reuse, recovery, and recycling.

Guarantee Certificate

EUROSTER 813

Warranty terms:

1. Warranty is valid for 24 months from the controller sale date.
2. Claimed controller and warranty certificate must be supplied to the seller.
3. Warranty claims processed within 14 business days of manufacturer receipt.
4. Controller repair exclusively by manufacturer or authorized party.
5. Warranty invalidated by mechanical damage, incorrect operation, or unauthorized repairs.
6. This warranty does not exclude, restrict, or suspend Buyer's rights if the product does not meet sale contract terms.

Sale Date: ...............................................................................................................................

Serial Number/Date of Manufacture: ...............................................................................................................................

Signature/Stamp: ...............................................................................................................................

Business entity that issued this warranty certificate: P.H.P.U. AS Agnieszka Szymańska-Kaczyńska, Chumiętki 4, 63-840 Krobia, Poland.