marco PB10 Water Boiler Ecoboiler Owner’s Manual

marco PB10 Water Boiler Ecoboiler

Product Information

Specifications

• Model: ECO Boiler PB5, PB10, T5, T10
• Power: 2.8kW
• Plug Type: Moulded 13A plug
• Outlet Requirement: Suitable 13A outlet
• Mains Water Pressure Required: 5-50psi (35-345kPa)

Description

The Marco Ecoboiler Water boiler is a high-quality water boiler designed for installation and maintenance purposes. It is important to read the instructions carefully to ensure safe installation and operation.

External Arrangement

The external arrangement of the Ecoboiler Water boiler includes access to internal components such as PCBs and tank components. Refer to the user manual for detailed diagrams and descriptions.

Installation

1. Position the machine on a counter with a drainage facility.
2. Ensure a stop valve is fitted on a cold water line.
3. Attach a 3/4 BSP male fitting to the stop valve.
4. Connect the straight tailpiece of the inlet hose to the stop valve fitting, ensuring the sealing washer is fitted.
5. Flush the inlet hose and water pipe by turning on the water and allowing several gallons to flow through.
6. Connect the right-angled tailpiece of the hose to the inlet valve of the boiler (3/4 BSP), ensuring the sealing washer is fitted.
7. Turn on the water and check for leaks.

Operation

Before operating the machine, ensure that all installation procedures have been carried out and the water valve is turned on.

Plug the boiler into a 13A socket and press the power button on the front of the machine marked “Power” (refer to Figure 1).

• Power Button: Press to turn on/off the machine.
• Ready/Status Indicator: Indicates the current status of the machine.
• Ecomode Button: Press to activate Ecomode.
• 10L Display: Displays information about the machine.

Temperature Calibration

The Ecoboiler control PCB has a default set point temperature of around 80°C. During assembly, the PCB is calibrated to give a set point between 95°C and 96.5°C. If the temperature setting needs to be modified on-site, follow these steps:

1. Refer to the user manual for the location of the Ecoboiler control PCB.
2. Using appropriate tools, adjust the temperature setting to the desired value.

Troubleshooting

If you encounter any issues with the Ecoboiler Water boiler, refer to the troubleshooting section in the user manual for possible solutions.

Maintenance

Regular maintenance is important to ensure the optimal performance of the Ecoboiler Water boiler. Refer to the maintenance section in the user manual for detailed instructions on cleaning and descaling procedures.

Cautions and Safety Tips

Follow these cautions and safety tips to prevent accidents and ensure safe operation of the Ecoboiler Water boiler:

• Only authorized technicians or service providers should carry out installation and maintenance.
• Read and follow all safety instructions and technical data affixed to the machine or its packaging.
• Marco accepts no responsibility for any damage or injury caused by incorrect or unreasonable installation and operation.

FAQ

Q: Where can I find the wiring diagrams for the Ecoboiler Water boiler?

A: The wiring diagrams can be found in the user manual, specifically pages 8-22.

Q: What is the power requirement for the Ecoboiler Water boiler?

A: The Ecoboiler Water boiler requires a power supply of 2.8kW.

Q: Can the temperature setting be adjusted on-site?

A: Yes, the temperature setting can be adjusted on-site. Refer to the user manual for detailed instructions.

Q: What should I do if I encounter any issues with the machine?

A: If you encounter any issues with the Ecoboiler Water boiler, refer to the troubleshooting section in the user manual for possible solutions.

INTRODUCTION

Marco Beverage Systems Ltd.
63d Heather Road, Sandyford Industrial Estate, Dublin 18, Republic of Ireland

Ireland Tel: (01) 295 2674
Ireland Fax: (01) 295 3715
UK Tel: (0207) 274 4577
UK Fax: (0207) 978 8141

• The information provided in this manual is intended to assist in the installation and maintenance of the Marco Ecoboiler Water boiler. 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.
• Only technicians or service providers authorised by Marco should carry out installation and maintenance of these machines.
• Marco accepts no responsibility for any damage or injury caused by incorrect or unreasonable installation and operation.

SAFETY INSTRUCTIONS:

• Read all instructions.
• To protect against electric shock do not immerse mains cord in water or other liquid.
• To prevent chafing of the cable, do not let the mains cord hang over the edge of a table or counter; or touch hot surfaces.
• Do not operate any appliance with a damaged cord, plugs, or after the appliance malfunctions or has been damaged in any manner.
• Switch off at the mains (unplug or disconnect from outlet) and turn off the water supply when not in use and before cleaning. Allow to cool before removing components.
• The use of spares and accessories not recommended by Marco may cause damage and/or injuries.
• Do not use outdoors. Do not place on or near a hot gas or electric burner.
• Do not use the appliance for anything other than its intended use.
• Save these instructions.

BASIC INSTRUCTIONS:

INSTALLATION DETAILS:

Electrical installation:

ECO Boiler PB5, PB10, T5, T10 (2.8KW) – A moulded 13A plug is factory fitted. A suitable 13A outlet is all that is required.

Plumbing installation procedure:

Note: Marco recommend that this machine be positioned on a counter with a drainage facility.

Marco cannot be held responsible for any flood damages.

• Mains water pressure required (limits): 5-50psi (35-345kPa)

• Fit a stop Valve on a cold water line and attach a 3/4″ BSP male fitting, (e.g. 3/4″ x 1/2″ 311 or washing machine type stop valve).

• Connect straight tailpiece of the inlet hose to the stop valve fitting. Make sure that the pre- attached sealing washer is fitted.

• Turn on the water to flush any impurities, dust etc from the inlet hose and water pipe. Allow several gallons through.

• Connect right-angled tailpiece of the hose to the inlet valve of the boiler (again 3/4″ BSP).
  Make sure the sealing washer is fitted here also.

• Turn on water and check for leaks.

OPERATION:

• Check that all installation procedures have been carried out.

• Ensure water valve is on.

• Plug boiler into 13A socket and press power button on the front of the machine marked ‘Power’. Refer to Figure 1.
  NOTE: On a 5L machine the ‘Power’ button light also acts as the “Ready/Status” indicator.

• The “power on” light will glow green and the machine will fill to a safe level, above the elements, before heating.

• The “Ready/Status” light will cycle two red flashes while the machine is filling to the safe level.

• After this amount of water has heated to about 96°C the boiler will draw more water in until the temperature drops by 1 or 2 degrees. The boiler will then heat again. This heat fill cycle continues until the boiler is full.

• On a 5L machine, whilst the machine is above the safe level and filling, the “Ready/Status” light will glow orange.

• On a 10L machine, whilst the machine is above the safe level and filling, the “Ready/Status” light will remain blank.

• The “Ready/Status” light will glow green when the machine is both full and up to normal operating 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.

TEMPERATURE CALIBRATION

The Ecoboiler control PCB (1600345) has the ability to have the desired set- point temperature at whatever setting is required. During manufacture of the PCB it is set to the default temperature of around 80°C. During assembly the PCB is then calibrated to give a set point between 95°C-96.5°C.

If the temperature setting needs to be modified on-site please follow the steps below:

1. To Enter Calibration mode:

2. a. Turn the machine off at the mains power supply.

3. b. Then, whilst depressing the tactile switch on the PCB, turn the mains power back on.

4. c. All available LED’s on the front panel will now blink continuously.

5. d. The machine is now in Calibration mode.

6. In Calibration Mode the machine will heat continuously until the tactile switch on the PCB is pressed for a second time (NB: The tactile switch should be pressed for at least 1 second)

7. Using a thermometer to measure the temperature at the thermistor pocket, the machine should be allowed to reach the desired set-temperature. (NB: It may be necessary to let the unit cool down if the desired set point is lower than the units current temperature)

8. At this point the tactile switch on the PCB should be pressed for at least 1 second.

9. Following a correct calibration procedure the tank temperature should be maintained within 3°C of the desired set-point temperature.
   In the event of an incorrect calibration process the steps below should be followed:

10. If the tactile switch is pressed too early and the temperature is set lower than desired, the tester should simply repeat steps 8-11.

11. If the tactile switch is pressed too late and the set temperature is too high, the tester will need to wait for the temperature in the tank to cool, or add cool water, and then repeat steps 8-11.

TIME/VOLUME DISPENSE CALIBRATION

1. Open the front – bottom panel.

2. Make sure that the machine is powered, filled and heated (ready lamp green).

3. Press calibration tactile button on the PCB for a second until status lamp starts blinking red-green.

4. Set new dispense time by pressing dispense button to obtain the required output volume of water.
   Button may be pressed several times — all times / volumes will be added together.

5. To confirm and save new value press calibration button on the PCB for a second until the status lamp stops blinking.

6. Setting dispense time / volume to zero (omit step 4) will make the machine work as “push & hold” (water dispensed as long as the button is pressed).

TROUBLESHOOTING
The Ready/Status light signals various errors or problems.
A cycle of red flashes indicates an error. The number of flashes in a cycle corresponds to the symptom in the table below:

Status/Diagnostic light guide:

Note: Some of the error sequences will be displayed if there is low water pressure. Please check that there is water pressure and that the water stopvalve is open before calling your service agent. For a more detailed description of error indicators and corrective actions see section 4.7 of this manual.

MAINTENANCE:

Marco machines have been designed to give many years of trouble free service. Marco Beverage Systems manufacture and test to ISO9002:2000 standard. The only regular maintenance required is occasional de-scaling.

Descaling Procedure:

• Isolate machine from power supply.
• Isolate machine from water supply.
• ALLOW TO COOL COMPLETELY!
• Drain water from machine.
• Remove all lids.
• Remove as much scale as possible by hand, paying particular attention to level probes (White plastic with steel tab). Be very careful not to damage any attachments.
• Use ScaleKleen, Marco part No. 8000270 or similar. Follow instructions carefully.
• Thoroughly clean and flush the machine before re-use.
• Follow installation and first time operation instructions

CLEANING:

The exterior of these machines may be cleaned with a damp cloth and a light detergent. Do not use abrasive cloths or creams, as this will spoil the finish of the machine. Do not use a water jet or spray. Beware of accidentally operating the draw off tap or push button when cleaning the front of the machine.

LIMESCALE:
In common with all water boiler manufacturers, service calls resulting from limescale are not covered by warranty. Fitting a 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. A scale reducer can reduce the build up of scaling, but may not stop it altogether. Descaling of the machine should ideally be carried out by qualified service personnel.

CAUTIONS AND SAFETY TIPS:

• This appliance must be earthed. If the moulded plug supplied is not used then ensure that the green/yellow cable is connected to a suitable earth.
• Risk of flooding. The hose supplied with this unit is non-toxic food quality tested to 190psi. However, a hose is not a permanent connection. It is, therefore, advisable to switch off boiler and close the stopcock valve when boiler is not in use, e.g. overnight, weekends etc.
• Risk of scalding. Beware of accidentally operating the water drawoff tap especially when cleaning the front of the boiler.
• The utmost care has been taken in the manufacture and testing of this unit. Failure to install, maintain and / or operate this boiler 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 boiler always contact the manufacturer or your own supplier for advice.

Technical Data:

GENERAL DESCRIPTION:

EXTERNAL ARRANGEMENT:

ACCESS TO INTERNAL COMPONENTS:

To access the tank:

To access the internal components:

• Disconnect the machine from the electrical supply.
•  Allow to cool sufficiently.
• The metal Front Fascia Top and Bottom panels are fixed to the surround with ball studs that lock into spring clips mounted in the surround panel – refer to picture above.
• To separate the ball studs from the spring clips insert a flat headed screwdriver at the locations indicated on the picture and lever apart the front panels from the surround.
• To remove the Front Fascia Top panel, after seperating the ball stud from the spring clip, rotate the top edge of the panel forward and pull the panel in an upwards motion.
• Place the panel to the side of the machine
• To remove the Front Fascia Bottom, after seperating the ball stud from the spring clip, rotate the bottom edge of panel forwards and pull in a downward motion. This panel is now free to be placed out of the way.
• This allows access to most of the internal components and the machine does not need to be drained for most maintenance or service operations.
• If further access is required, the plastic Front Fascia Middle panel should be removed by unscrewing the four cross recessed pan headed screws.
• On Tap versions, the Tap assembly will need to be removed before the plastic Front Fascia Middle can be removed.
• The Tank can be drained by removing the plug from the end of the drain hose, and draining into an external drain or a large enough container.

Inlet Solenoid Access:

• To access the inlet solenoid, the PCB and PCB bracket need to be removed.
• Unscrew the two crss-recessed pan headed screws holding the bracket in place.

4.4. INTERNAL ARRANGEMENT:

PCBs:

PCB Layout:
Internal PCB Layout:

PCB Ecoboiler Control (1600345):

• Controls the heater switching
• Controls the water inlet switching
• Controls tank temperature/temperature adjustment

PCB Ecoboiler Display 5L (1600348) consists of:

• Power On/Off button
• Power On LED
• Status/Ready LED

PCB Ecoboiler Display 10L (1600349) consists of:

• Power On/Off button
• Power On LED
• Status/Ready LED
• ECO Mode On/Off Button
• ECO Mode On LED

PCB Ecoboiler Control:

COMPONENTS OF PCB ECOBOILER CONTROLLER 2008:

1. Dispense Solenoid Tab

2. Inlet Solenoid Tab

3. Neutral Tabs

4. Transformer

5. Mains Live In Tab

6. Relays – Heater
   Switch the element

7. Heater Tab

8. On/Off 2-way Connector
   Short circuited on this Ecoboiler machines – power switch controlled through the display PCB

9.  LED 5-way Connector

10. Earth Tab

11. Daughter PCB Connector (low voltage)
    Connects to Daughter PCBs – allows switching of more than one element

12. External Connector

13. Thermistor Connector

14. Dip Switch – 3 way
    Allows selection of software for specific machine

15. Tactile Switch
    For use during calibration procedure (refer to Calibration in Sec 3.3)

16. Water Level – 5-way connector (low voltage)
    Connects to Low level and High level probes. Also connects push button on PB variants.

17. Button Connector – 4-way

18. Data I/O Connector – 4-way

19. Relays – Inlet Solenoid

PCB Display Ecoboiler 5L (1600348)

1. Power On LED’s
   shows that machine is switched on

2. Status LED’s
   displays Error signals via a flashing RED LED

3. Power On/Off switch

4. 5 way connector – to PCB Ecoboiler LED connector

5. 4 way connector – to PCB Ecoboiler BUTTONS connector

PCB Display Ecoboiler 10L (1600349)

1. Power On LED’s
   shows that machine is switched on

2. Power On/Off switch

3. Status LED’s
   displays Error signals via a flashing RED LED

4. Eco Mode On LED’s

5. Eco Mode On/Of Switch

6.  5 way connector – to PCB Ecoboiler LED connector

7.  4 way connector – to PCB Ecoboiler BUTTONS connector

TROUBLESHOOTING – DIAGNOSTIC GUIDE:

FLASH CYCLE – BELOW LOW LEVEL

Display pattern:

• 2 flashes then a short pause – repeated.
  Electronic check and action:

• This indicates that the low level circuit is open i.e. the probe is not in contact with the water.

• The element is switched OFF at this stage and the inlet is left ON. (note that if this is a low probe wiring fault, the water will stop at the high level probe regardless of the status of the low level).

• This is a recoverable error i.e. the machine does not need to be reset when the problem is solved. (e.g. if a closed mains water stop valve is the problem, opening the valve will allow water into the machine and normal function will resume when the low level probe is reached)

Probable causes:

1. The water level is below the low level probe, which is normal when the machine fills for the first time. (Can be flashing for up to 2 min at start up)
2. The low level probe wire is disconnected, or there is another wiring fault (eg. a bad earth (return) connection between the PCB and the Tank)

Action required:

1. Check that the water pressure is OK and ensure that the stop valve is open.
2. Check that the inlet solenoid is working.
3. If the water level is above the level of the low probe, check the probe circuit wiring

FLASH CYCLE – THERMISTOR OPEN CIRCUIT

Display pattern:

3 flashes then a short pause – repeated. Electronic check:

• This indicates that the Thermistor is measuring such a large resistance that it assumes the thermistor circuit is open.
• The element and inlet valve are turned OFF when this error is detected
• This is a recoverable error. When the correct range of resistance is measured, normal operation resumes

Probable causes:

The thermistor probe is unplugged from the 4way connector on the PCB or the thermistor has failed open circuit.

Action required:

Check that the thermistor is plugged in to the PCB correctly. If it is, replace the thermistor.

FLASH CYCLE – NOT HEATING

Display pattern:

• 4 flashes then a short pause – repeated.

Electronic check:

• This checks that the temperature is increasing when the heater is on.
• Measures the rate that the temperature increases in a specified time. This error is only displayed after 20 mins of the heater being on continuously. When the error is detected, the element and inlet valve are turned off.
• This is a non recoverable error. The machine needs to be reset when this problem is solved.

Probable causes:

1. The elements have failed
2. Wiring fault

TROUBLESHOOTING – DIAGNOSTIC GUIDE cont:

Action required:

1. Check that the resistance on the elements. If there is a reasonable resistance (15-25Ω)on the element it probably has not failed, so the wiring might be at fault.

FLASH CYCLE – THERMISTOR SHORT CIRCUIT

Display pattern:

• 5 flashes then a short pause – repeated.
  Electronic check:

• This indicates that the Thermistor is measuring zero resistance. It assumes the thermistor has failed sort circuit.

• The element and inlet valve are turned OFF when this error is detected

• This is a recoverable error. When the correct range of resistance is measured, normal operation resumes.
  Probable causes:

The thermistor has failed.

Action required:
Replace the thermistor.

FLASH CYCLE – NOT FILLING

Display pattern:

• 6 flashes then a short pause – repeated.
  Electronic check:

• This checks that the water in the tank cools when the inlet solenoid valve is switched on.

• This is a non-recoverable error. This checks that the water in the tank is cooled by when the inlet solenoid valve is opened. If the water pressure is within the specifications (5- 50psi), the inlet solenoid should not be on for more than a few seconds. If this water
  temperature has not decreased by the required amount (1 degree per minute), the inlet solenoid is switched off and the 6 flash cycle is displayed.

Probable causes:

1. Mains water pressure problem or the mains water stop valve is closed.
2. Inlet solenoid valve failure.

Action required:

1. Check the mains water supply. (Note: Temporary loss of water pressure can occur in certain sites – particularly when various machines are plumbed to the same mains water supply.) If the water supply is ok, reset the machine (switch the machine Off and On again). This will reset the error and if the water supply is ok, the machine will return to normal operation.
   NOTE: If the water supply is the problem, ensure that this is rectified or this error will reoccur.

2. If there is no problem with the mains water supply, check that the inlet solenoid valve is working.

Tank Components

• The tank internals are detailed below. Care should be taken when cleaning inside the tank.
• The level probes provide much of the control inputs into the PCB and are critical to the operation of the machine. The wiring to these should be checked regularly and the probes themselves should be cleaned whenever the machine is serviced.
• There are 3 level probes on the 10L Ecoboiler versions and 2 level probes on the 5L versions.
• The Ecoboiler T10 tank is shown below – only the low level probe is visible in the picutre.

Descaling Procedure

To descale the machine thouroughly:

• Unplug the machine.
• Disconnect from the water supply.
• Drain as much water from the tank as possible.
• Remove the lids and allow the machine to cool completely.
• Drain all the water from the machine.
• Attempt to remove as much scale as possible by hand.
• Reconnect machine and start up once again.
• Add a descale solution (follow instructions as given). Flush the machine thouroughly before use

Wiring Diagram 1000660 Ecoboiler T5

Spare Parts List

Service Manual 1000660 T5 1000661 T10 1000665 PB5 1000666 PB10 Ecoboiler 231109.doc

References

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