The Ecodos-L, Ecorinse-L, and Ecoset-L are dosing units manufactured by ECOLAB Engineering GmbH, designed for use in commercial dishwashers. These systems are capable of speed/timed and conductivity-controlled dosing of liquid/solid detergents and liquid rinse products. The manual emphasizes that all safety information and highlighted points must always be observed.
Function Description:
The core function of these units is to precisely dose cleaning agents and rinse aids into commercial dishwashers. The control electronics are powered by an external transformer when an enabling signal is received from the dishwasher. A green LED on the front of the unit indicates operation (continuously lit) or standby mode (flashing). Dosing can be performed in three modes, configurable on the PCB:
- Continuous controlled dosing: This mode allows for a constant flow of product.
- Timed controlled dosing: Product is dispensed for a set duration.
- Conductivity controlled dosing: Dosing is regulated based on the conductivity of the wash liquor, ensuring optimal concentration.
The Ecodos-L and Ecorinse-L models are designed for liquid/solid detergents and liquid rinse products, respectively, while the Ecoset-L is specifically for detergent.
Important Technical Specifications:
- Supply Voltage: AC 24 V, 15 W, 50-60 Hz
- Safety Type: Ecodos-L / Ecorinse-L / Ecoset-L: III
- Protective Class: IP 54
- Detergent Metering Pump (Ecodos-L / Ecoset-L):
- Delivery Rate (Tube size = 3 CC): Approximately 0.6 to 6 l/h
- Head of Suction: Max. 2 m column of water (dependent on back pressure)
- Back Pressure: 0 bar
- Rinse Metering Pump (Ecorinse-L):
- Delivery Rate (dependent on back pressure):
- Tube size = 1/2 CC: Approximately 110 ml/h to 1.20 l/h
- Tube size = 1/4 CC: Approximately 55 ml/h to 0.6 l/h
- Tube size = 1/8 CC: Approximately 28 ml/h to 0.3 l/h
- Head of Suction: Max. 2 m column of water
- Backpressure: Max. 3.5 bars (0.35 MPa)
- Inputs:
- Power Supply "POWER AC24V": Via external transformer (AC 24V, 15 W)
- Enable "IN1": 5VDC-contact, not galvanic isolated
- Low level "IN2": 5VDC-contact, not galvanic isolated
- Conductivity Sensor 2-wire "7 8": "P120" probe (part no. 418811360)
- Inductive Sensor "1 ... 6": Inductive probe (part no. 2874xx)
- Outputs:
- 24V AC-output "OUT AC24V": AC24V, max. 15W*, Triac
- 24V DC-motor "DC-Motor + -": DC24V, speed controlled, max. 15W*
- 24V AC-output "ALARM AC24V": Alarm, AC24V, max. 15W*, Triac
- *Total power consumption max. 15W
- LED Indicators:
- Front side: Operation indication (green), Fault indication (red)
- At PCB: "100%"-LED (Concentration indicator), "OUT"-LED (AC-Output indicator)
- Control Functions:
- Continuous mode: Speed: Approximately 4 to 40 rpm
- Time control mode: Delay: 0 to 63 sec., Dosing time: 1 to 126 sec., Speed: Approximately 4 to 40 rpm
- Conductivity mode: Concentration range: 0 to 25.2 mS/cm* (for 2-wire probe w. P120 probe), t max. 10 to 1260 sec, Speed: Approximately 4 to 40 rpm
- Accuracy:
- Conductivity measuring: ± 10% of value for conductivity <= 3mS/cm, ± 5% of value for conductivity > 3mS/cm
- Inductive mode: ± 10% of value w. P120 probe
- Ambient Temperature: Max. 50°C
- Dimensions (W x D x H):
- Ecodos-L / Ecorinse-L: 150 x 95 x 145 mm
- Ecoset-L: 215 x 160 x 150 mm
- Weight:
- Ecodos-L / Ecorinse-L: Approximately 2 kg
- Ecoset-L: Approximately 4 kg
Usage Features:
- Wall Mounting: The units are designed for wall mounting, with specific guidelines for optimal operation (max. 1.8 meters mounting height, max. 3.0 meters distance to product container).
- Product Feed Line and Metering Hose Installation: Involves marking water levels, drilling holes, installing tank connectors, and connecting hoses between the unit and the tank/pick-up probe.
- Conductivity Sensor Installation: Requires careful selection of measuring and metering points in the tank, ensuring the measuring point is behind the metering point with regard to flow direction. Specific distance requirements from tank corners (at least 50 mm) and heating elements (as far as possible) are provided.
- Buzzer Volume Adjustment: The unit includes an acoustic alarm buzzer whose volume can be adjusted by manually turning an inner disk.
- Prime Button / Quit Button: Used for priming the pump and exiting certain modes.
- LED Indicators: Provide visual feedback on operation (green), fault conditions (red), concentration, and AC-Output.
Maintenance Features:
Maintenance and repair work must only be performed by authorized personnel, wearing suitable protective clothing, and observing all safety provisions for handling chemicals. The power supply from the dishwasher must be interrupted before any repair work. Only original spare parts are to be used, and a functional test must be performed after each repair.
- Replacement of Peristaltic Tube:
- Loosen tube ties and remove product feed- and metering tubes.
- Open the lever by pressing a strap on the back wall.
- Remove the old peristaltic tube.
- Clean the tube housing and remove old silicone residues.
- Insert a new peristaltic tube and lubricate it.
- Push the cover back and click the blue lever into the strap.
- Replacement of Roller Assy:
- Remove the cover and old peristaltic tube.
- Clean the tube housing and remove old silicone residues.
- Press the fixation strap with a screwdriver and lift off the roller assy holder.
- Carefully remove the roller assy from the pump head housing.
- Insert the new roller assy, mount the roller holder.
- Reinstall the pump head.
- Replacement of PCB:
- Remove the cover.
- Remove all cables from the PCB.
- Remove the screws from the PCB and install the new PCB in reverse order.
- Replacement of Buzzer:
- Remove screws from the housing cover and carefully remove the cover with its seal.
- Remove the two buzzer connectors from the screw terminal "ALARM AC24V" of the PCB.
- Unscrew and remove the coupling nut from the buzzer and remove the buzzer.
- Install the new buzzer simultaneously in reverse order.
Troubleshooting:
The manual provides a detailed troubleshooting guide for common issues, categorizing symptoms by "Pump does not work," "Pump does not draw / meter product," "Product leakage from pump head," and "Electronic related." For each symptom, possible causes and corrective actions are listed. For example, if the pump does not work when power is applied, possible causes include a defective pump motor/solenoid valve or blocked tube rollers, with corrective actions being to replace the respective parts. Electronic issues, such as the LED not illuminating or flashing, are also addressed with solutions like checking the transformer/wiring or replacing the PCB.
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