Metos PROFF Water Dispenser

1. General

Carefully read these instructions for proper, efficient, and safe installation, use, and maintenance. Keep this manual in a safe place for future reference.

Installation must comply with manufacturer's instructions and local regulations. Electrical and water connections must be made by qualified persons only.

Users should be specifically trained in operation. Switch off the appliance during failure or malfunction. Periodical function checks must be performed as instructed.

Service should be carried out by a technically qualified person authorized by the manufacturer, using original spare parts. Non-compliance may endanger the appliance.

1.1. Symbols used in the manual

• [STOP]: Indicates a safety risk; instructions are mandatory to prevent injury.
• [Caution]: Informs about correct procedures to prevent bad results, appliance damage, or hazardous situations.
• [Information]: Provides recommendations and hints for best performance.
• [Hygiene]: Highlights the importance of careful and regular cleaning for hygiene requirements.

1.2. Symbols used on the appliance

• [Electrical Terminals]: Indicates electrical terminals behind a part, requiring removal by qualified persons only.

1.3. Checking the relationship of the appliance and the manual

Check the rating plate for refrigerant and the appliance's serial number. If manuals are missing, they can be ordered from the manufacturer or local representative using the serial number.

2. Safety

2.1. Safe use of the appliance

• [STOP] The appliance must be connected to an earthed socket.
• [STOP] Always unplug the appliance from the power supply when moving or servicing.
• [WARNING] Refrigerant R290 (propane) is highly flammable. Handle equipment containing R290 with extra care.
• [STOP] Do not set the refrigeration unit's temperature colder than factory settings. This can cause freezing, damage to actuators (like taps), and potential water damage.
• [Caution] Modifying the equipment without manufacturer approval invalidates product liability.
• [Caution] Failure to follow instructions may lead to dangerous situations.
• [STOP] The manufacturer is not responsible for operations performed without following this manual.

2.2. Disposal of the appliance

The appliance contains parts requiring special disposal treatment. Contact local authorities for disposal instructions.

3. Functional description

3.1. Intended use of the appliance

The appliance is intended for cooling and dispensing drinking water.

3.2. Structure and operating principle

Free-standing models (WD series) are designed for serving lines. D-I models are supplied without an outer casing for insertion into line structures.

The top of the unit features a faucet and a basin with a drain for drip water.

3.2.1. Electronic faucet (models PWD-04A-E, PWD-04A-EN, D-IWD-E, D-IWD-EN)

The faucet operates via a solenoid valve activated by a photocell. Water flows when a glass is detected within the sensor's range. The faucet automatically shuts off after an adjusted flow period. It functions best with flat-bottomed glasses.

4. Operating instructions

4.1. Operation

• Mechanical faucet: Push the lever with a glass.
• Electronic faucet: Hold a glass under the faucet.

4.2. After operation

4.2.1. Cleaning the exterior surfaces

[Caution] Clean stainless steel surfaces with neutral, liquid detergents. Do not use abrasive or corrosive agents.

4.2.2. Cleaning the condenser (to be performed by a service technician)

[STOP] Disconnect the appliance from the power supply before cleaning the condenser.

Clean the condenser annually, or more often if necessary. Clogging is indicated by longer compressor run times, reduced cooling effect, and rising condensing temperatures, which can damage the compressor.

When cleaning with a brush, be careful not to damage the condenser. A vacuum cleaner can also be used.

4.2.3. Replacing the filter (option, to be performed by a service technician)

Replacement is recommended every 4800 litres or when the filter is clogged (indicated by decreased water output or weaker flow). Replace approximately every six months.

Filter components: 1. Holder, 2. Filter, 3. Cover.

Procedure: Turn off water supply, run faucet to release pressure, unscrew cover (3) from holder (1), remove old filter (2), insert new filter, and screw cover (3) back onto holder (1).

5. Installation

5.1. General

The appliance operates in temperatures between 10°C and 35°C. Avoid installation near heat-generating appliances.

[STOP] If water pressure exceeds 5 bar, a pressure reducing valve must be installed.

5.2. Storage

Store in a dry place above +1°C. If exposed to temperatures below 0°C, drain and allow to melt. Check for damage or leaks before use.

[Caution] For electronic faucets, ensure water in the faucet and solenoid valve does not freeze.

5.3. Unpacking the appliance

Transport the appliance in its packaging. Unpack just before installation to prevent dust from damaging the appliance. Store and transport upright.

5.4. Installation

Place the appliance in a well-ventilated room, avoiding direct sunlight. Install vertically with an accuracy of ±3°; greater skewness may cause malfunctions.

For D-I models, ensure a 10 cm air gap between the machinery and the floor to prevent water damage to electrical components.

The compressor has vibration damping. A rubber mat may be used to absorb vibrations and noise if necessary.

The thermostat is factory-set. For refrigerated D-I models, ensure adequate condenser air circulation; do not block air inlets or outlets.

5.4.1. Opening for the drip basin (D-I models)

An opening must be made in the tabletop for the drip basin when installing D-I models inside a counter. The necessary openings are marked on diagrams.

• For D-I WD-E, D-I WD-EN: The diagram shows dimensions for a drip basin opening, including a 400mm width, 154mm height, 140mm depth, and a Ø32mm hole.
• For D-I WD-E2, D-I WD-EN2: The diagram shows dimensions for drip basin openings, including a 330mm width, 640mm height, 154mm depth, 134mm spacing, and holes of Ø32mm and Ø130mm.

5.5. Electrical connections

The appliance operates on 1/N/PE AC 230V 50Hz. Connect to a power supply with an earthed socket.

5.6. First start up

The water tank must be filled manually before the first start-up. The tank volume is approximately 9 litres. Fill through the pipe located behind the front panel and check the water level.

5.7. Adjusting the glass filling rate (mechanical faucet)

The water filling rate is adjusted using a screw (1) on top of the faucet with a screwdriver. If air is dispensed after installation, run water until it runs clear.

5.8. Adjusting the electronic faucet for the glass used

This procedure must be performed by an authorized service technician or installer.

5.9. Adjusting the water flow (electronic faucet)

This procedure must be performed by an authorized service technician or installer.

6. Troubleshooting

If the appliance does not function as expected, consult the following table to resolve issues without a service call. For further assistance, contact Metos service.

[STOP] The appliance contains no user-serviceable parts. Service must be carried out by an authorized service company.

7. Technical specifications

The following diagrams and specifications are available:

• Refrigeration circuit diagram
• Connection diagram S00354 A3 (Mechanical faucet)
• Connection diagram S00196 A2 (Electronic faucet)
• Dimensions, machinery
• Installation drawing

Refrigeration circuit diagram

The diagram illustrates a refrigeration system comprising a Heat exchanger, Compressor, Condenser, Drier, and Capillary tube. Arrows indicate the flow of refrigerant.

Connection diagram S00354 A3 (Mechanical faucet)

This electrical schematic shows the main power input (L, N) connected via a switch with a signal light. The circuit includes a Pump (M), a Condenser fan (M), and a Compressor (Co), all controlled by a Thermostat.

Connection diagram S00196 A2 (Electronic faucet)

This diagram details the electrical connections for the main and control circuits of electronic faucet models. It includes power input (L, N, PE), a switch (S1), an infrared sensor (INFRAPUNA-TUNNISTIN), a solenoid valve (VESIVENTTIILI), a fan (PUHALLIN), and a compressor (KOMPRESSORI).

Dimensions, machinery

The unit has the following approximate dimensions: Length: 520 mm, Width: 470 mm, Height: 395 mm. The front panel height is approximately 295 mm.

Installation drawing

Installation drawings provide guidance for placing both Mechanical and Electronic models. They indicate water inlet connections (Verkostovesi sisään Cu-Ø10mm / Water in Cu / Vatten in) and drain connections (Viemäröinti Muoviputki Ø25/19 / Drain-Plastic pipe / Avlopp-Plast rör).

A detail notes that the faucets can be turned 180°.

Technical Specifications Table

Declaration of Conformity

Manufacturer: METOS OY AB, Address: 04220 KERAVA, FINLAND

Product: Water dispenser, Proff / Classic / Nova / Corona Drop-in

This product declares conformity with the following directives: MD 2006/42/EC, LVD 2014/35/EU, EMC 2014/30/EU, RoHS 2011/65/EU, WEEE 2012/19/EU, ATEX 2014/34/EU.

The following harmonised standards have been applied: EN 61000-6-3: 2007, EN 61000-6-1: 2016, EN ISO 12100:2010, EN 60079-15:2019, EN 60204-1:2018.

This declaration of conformity is issued under the sole responsibility of the manufacturer. The object of the declaration described above is in conformity with the relevant Union harmonisation legislation.

Issued in: KERAVA on 14.02.2022

Declaring persons: Hannu Ahola - Director of Business Unit, Marko Immonen - R&D Manager