Marco MT Boiler Instruction Manual

1. Information

1.1 Introduction

The information provided in this manual is intended to assist in the installation and maintenance of the MT range of hot water boilers. Please read the instructions carefully to prevent accidents and ensure an efficient installation. This manual is not a substitute for any safety instructions or technical data affixed to the machine or its packaging. All information in this manual is current at the time of publication and is subject to change without notice. Marco Beverage Systems Limited accepts no responsibility for any damage or injury caused by incorrect or unreasonable installation and operation.

1.2 Safety

When using electrical appliances, basic safety precautions should always be followed to prevent the risk of fire, electric shock, burns, or other injuries or damages:

• Read all operating and safety instructions carefully.
• This appliance is not suitable for outdoor use.
• This appliance must be placed/installed on a horizontal flat stable surface.
• The ambient temperatures this appliance should operate within are 5°C – 35°C.
• Do not store the appliance in ambient temperature lower than 5°C.
• This appliance is designed for use in self-service areas in which it can be attended to by trained personnel.
• Only the water hose supplied with the machine should be used to connect to the mains water supply.
• The hose supplied with the boiler is non-toxic food quality. However, a hose is not a permanent connection. It is, therefore, advisable to switch off the boiler and close the stopcock valve when the boiler is not in use, e.g. overnight etc.
• If a non-fixed water connection is implemented, use only the water hose provided with the appliance; alternatively, if a fixed water connection is used, it must be implemented using a non-detachable water hose.
• If the water hose is disconnected, the seals should be replaced before re-connection.
• Risk of scalding: Beware of accidentally operating the water draw-off tap, especially when cleaning the front of the boiler.
• The utmost care has been taken in the manufacture and testing of this machine. Failure to install, maintain and/or operate this machine according to the manufacturer's instructions may result in conditions that can cause injury or damage to property. If in any doubt about the serviceability of the machine, always contact the manufacturer or your own supplier for advice.
• This machine is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the machine by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the machine.
• In the event where any wires are damaged, such wires can only be replaced by qualified service technicians.
• CAUTION – Risk of fire and electric shock. Only to be used with manufacturer's specified power cord set. Marco p/n 1501487 (USA), 1501488 (EU), 1501489 (UK/Ire).
• This appliance should not be installed in an area where a water jet could be used to clean it.
• Access to the service area of the appliance is restricted to persons having knowledge and practical experience of the appliance and the relevant safety and hygiene requirements.

1.3 Electrical Installation Procedure

Electrical specification: 2.8kW 200-230Vac 50Hz. When installing the machine, always observe the local regulations and standards. The appliance is supplied with a moulded power cord. A suitable mains power supply socket should be available within easy access of the appliance so that it can be disconnected easily after install.

1.4 Plumbing Installation Procedure

• Ensure that the equipment is installed according to local plumbing & water regulations.
• Mains water pressure required (limits): 100-500kPa, 0.1-0.5MPa (14.5–72.5psi).
• Fit a stop valve on a cold water line and attach a 3/4” BSP male fitting (e.g., 3/4" x 1/2” or washing machine type stop valve).
• Turn on the water to flush any impurities, dust etc from the inlet hose and water pipe. Allow several litres through, especially for new installations.
• Connect the hose to the inlet valve of the boiler. Make sure a sealing washer is fitted.
• Turn on water and check for leaks.
• NOTE: Using a non-food grade hose (e.g., a washing machine hose) will usually result in off tastes & smells in the water and can possibly be toxic.
• Do not connect the machine to pure reverse osmosis water or other aggressive types of water.

1.5 Backflow Prevention

This equipment must be installed with adequate backflow protection to comply with all applicable federal, state and local codes.

1.6 Maintenance

This machine has been designed to give many years of trouble-free service. The only regular maintenance required is occasional de-scaling.

1.7 Descale Procedure

Descaling of the machine should be carried out by qualified service personnel.

1.8 Limescale

In common with all water boiler manufacturers, service calls resulting from limescale are not covered by warranty. For units without a water filter, fitting an external scale reducer is recommended, especially in hard water areas. This can reduce the build-up of scale but may not stop it altogether. The frequency that descaling is required depends on the local water supply; hard water areas need more attention. Descaling of the machine should be carried out by qualified service personnel.

1.9 Operating the Boiler for the First Time

1. Check that all installation procedures have been carried out.
2. Ensure the water valve is connected.
3. Plug in the IEC connector to the boiler.
4. On models with a filter, connect the filter.
5. Plug the boiler into a suitable socket.
6. The boiler will power up.
7. The screen will show the software revision.
8. The machine will then fill with water, and the display will flash between E-2 & the current temperature of the tank, until the water has reached the low-level probe, then it will show the current water temperature.
9. The default temperature is 95°C.
10. Once the machine is up to temperature, the boiler is now ready for use.

NOTE: Because the boiler is electronically controlled, no priming is necessary. The element cannot switch on until a safe level of water is reached.

1.10 Contact Details

Marco Beverage Systems Limited.
74 Heather Road,
Sandyford Industrial Estate,
Dublin 18

Tel: +353 (0)1 295 2674
Fax: +353 (0)1 295 3715
Email: sales@marco.ie
Website: www.marcobeveragesystems.com

[CE certification mark]

2. Installation

Step 1: Connect the 6.35mm (1/4 inch) tube to the inlet.

Step 2: Attach the component as shown.

Step 3: Connect to the base unit.

Step 4: The boiler is shown. Note: Software revision may change in the future.

3. Installing Filter

Step 1: Position the boiler and indicate the drip tray area.

Step 2: Install the filter (part number 8000781). Ensure the orientation indicator on the filter points left before rotating to secure it.

Step 3: The filter is now installed.

4. Operating Boiler

Diagram of Parts: 1. Screen, 2. Standby Button, 3. Tap, 4. Drip Tray.

Step 1: Identify the parts of the boiler.

Step 2: The machine displays "E-2" indicating "Tank Filling; water under low level probe".

Step 3: The tank is filling, and the display shows the current temperature.

Step 4: Dispense hot water from the tap.

5. Service Set Up - Changing Temperature

Step 1: Press and hold the button for 5 seconds.

Step 2: Adjust the temperature. The range is 60°C - 97°C. Add one degree per press.

Step 3: To save the value, press and hold the button for 5 seconds.

6. Service Set Up - Filter Mode

Step 1: Press and hold the button for 10 seconds. The machine estimates how much water goes through the system and triggers a filter flag if a filter change is required.

Step 2: Adjust filter units. Each unit is 200L. Setting to "00" disables the filter change flag.

Step 3: Save the setting by pressing and holding the button for 5 seconds.

7. Service Set Up - Changing from Celsius to Fahrenheit

Step 1: Press and hold the button for 15 seconds.

Step 2: Switch between Celsius (°C) and Fahrenheit (°F).

Step 3: Save the setting by pressing and holding the button for 5 seconds.

Step 4: The display shows the conversion, e.g., 203 = 203°F.

8. Service Set Up - Heat Fill Selection

Step 1: Press and hold the button for 20 seconds.

Step 2: Switch between H-F (Heat Fill) and C-F (Continuous Fill).

Step 3: Save the setting by pressing and holding the button for 5 seconds.

Heat Fill (default & recommended setting): The inlet valve lets in a small fixed volume of water, and the element turns on heating the water to the set temperature. This process is repeated until the water has reached the high-level probe and the machine is up to temperature.

Continuous Fill: The inlet solenoid stays open until the water has reached the high-level probe. Simultaneously, the element stays on until the machine is up to the programmed set temperature.

9. Cleaning & Maintenance

Step 1: Remove the drip tray.

Step 2: Clean the drip tray.

Step 3: Clean the drip tray (maximum temperature 65°C).

Step 4: Reassemble the drip tray.

10. Troubleshooting

The screen of the boiler indicates various errors or problems with the machine. See the diagnostic table below for further details.