Marco Ecoboiler UC4L, 1000742, Ecoboiler UC10L, Ecosmart UC10L, Ecosmart UC4L Service Manual

UNDERCOUNTER

SERVICE MANUAL

Ecoboiler UC4L 2.4kW

1000740

Ecoboiler UC10L 2.8kW

1000741

Ecoboiler UC10L 5.6kW

1000742

Ecosmart UC4L 2.4kW

1000750

Ecosmart UC10L 2.8kW

1000751

Ecosmart UC10L 5.6kW

1000752

Marco Beverage Systems Ltd.

63d Heather Road,

Sandyford Industrial Estate,

Dublin 18,

Republic of Ireland

Ireland Tel: [phone]

Ireland Fax: [phone]

UK Tel: [phone]

UK Fax: [phone]

Service manual 1000740 1000741 1000742 1000750 1000751 1000752 06-12-11 Page 2 of 24

1. INTRODUCTION:

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.

2. 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.

Service manual 1000740 1000741 1000742 1000750 1000751 1000752 06-12-11 Page 3 of 24

3. BASIC INSTRUCTIONS:

3.1. INSTALLATION DETAILS:

Electrical installation:

 Ecoboiler UC4L 2.4kW, Ecosmart UC4L 2.4kW - A moulded 13A plug is factory fitted.
 Ecoboiler UC10L 2.8kW, Ecosmart UC10L 2.8kW - A moulded 13A plug is factory fitted.
 Ecoboiler UC10L 5.6kW, Ecosmart UC10L 5.6kW - This unit must be connected to a

suitable single phase power supply. This should be done by a qualified electrician.

Plumbing installation procedure:
Note: 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.

3.2. 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’.

Ecoboiler UC4L/ Ecoboiler UC10L

 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 96ºC 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 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.

Ecosmart UC4L /Ecosmart UC10L

 The “power on” light will glow green and the machine will fill to a safe level, above the

elements, before heating. The display will show the current water temperature and the status “

Filling…”

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

Service manual 1000740 1000741 1000742 1000750 1000751 1000752 06-12-11 Page 4 of 24

 After this amount of water has heated to about 96ºC 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.

 While 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. For 10L machines allow approx 30 minutes.

 The boiler is now ready for use – the display will show the Water Temperature and the status “

READY”.

 The Boiler may now be used to dispense Hot Water to the preset factory settings.

o 94’C
o Push and Hold operation
o Continuous flow – no pulsing
o Auto heat Fill Mode.

Ecoboiler UC4L/ Ecoboiler UC10L Ecosmart UC4L /Ecosmart UC10L

NOTE:

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

3.3. TEMPERATURE CALIBRATION

Ecoboiler UC4L/ Ecoboiler UC10L

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 95°C.
If the temperature setting needs to be modified on-site please follow the steps below:

1. To Enter Calibration mode:
a. Turn the machine off at the mains power supply.
b. Then, whilst depressing the tactile switch on the PCB, turn the mains power back on.
c. All available LED’s on the front panel will now blink continuously.
d. The machine is now in Calibration mode.

Power
Button

Ready/Status
Indicator

Ecomode
Button

Service manual 1000740 1000741 1000742 1000750 1000751 1000752 06-12-11 Page 5 of 24

2. 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)

3. 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)

4. 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:

5. If the tactile switch is pressed too early and the temperature is set lower than desired, the

tester should simply repeat calibration.

6. 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 calibration.

Ecosmart UC4L /Ecosmart UC10L
PLEASE REFER TO INSTRUCTION BOOKLET FOR TEMPERATURE CALIBRATION.

3.4. TIME/VOLUME DISPENSE CALIBRATION

Ecoboiler UC4L/ Ecoboiler UC10L

1. Open the service 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).

3.5. 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:

No of

flashes

Symptom

Action required

2

Water level below elements. Normal

when machine first fills.

Check water pressure , if this is OK then call

service agent.

3

Temperature sensor failure (s/c)

Call service agent

4

Water not heating

Call service agent

5

Temperature sensor failure (o/c)

Call service agent

6

Machine not filling

Check water pressure.

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 stop-valve 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.

Service manual 1000740 1000741 1000742 1000750 1000751 1000752 06-12-11 Page 6 of 24

3.6. 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

3.7. 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.

3.8. 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.

3.9. 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.

Service manual 1000740 1000741 1000742 1000750 1000751 1000752 06-12-11 Page 7 of 24

4. Technical Data:

4.1. GENERAL DESCRIPTION:

4.2. EXTERNAL ARRANGEMENT

boiler UC4L/ E

Ecoboiler

UC4L

2.4kW

Ecoboiler

UC10L

2.8kW

Ecoboiler

UC10L

5.6kW

Ecosmart

UC4L

2.4kW

Ecosmart

UC10L

2.8kW

Ecosmart

UC10L

5.6kW

Dimensions

Height (mm)
Width (mm)
Depth (mm)

394
135
585

394
226
585

394
226
585

394
135
585

394
226
585

394
226
585

Performance

Immediate

Draw-Off
(litres)
Max. Hourly
Output (L/hr)

4L

24L

10L
28L

10L
56L

4L

24L

10L

28

10L
56L

Electrical

Connection

2.4kW,
230V, c/w

1.5m flex
and
moulded
plug - fused
(BS1363).

2.8kW
230V, c/w

1.5m flex
and
moulded
plug ­fused
(BS1363)
.

5.6kW.
must be
connecte
d to
single
phase
power
supply

2.4kW,
230V, c/w

1.5m flex
and
moulded
plug ­fused
(BS1363)
.

2.8kW
230V, c/w

1.5m flex
and
moulded
plug ­fused
(BS1363).

5.6kW.
must be
connected
to single
phase
power
supply

Plumbing

Fittings
Pressure

0.75” BSP
Food grade inlet hose supplied
5-50 psi (35-345 kPa)

Vent

Vent

Hose adapter to

font

Wiring Connector to

font

Service Panel

Controls

Vent

Hose adapter to

font

Wiring Connector to

font

Service Panel

Controls

Service manual 1000740 1000741 1000742 1000750 1000751 1000752 06-12-11 Page 8 of 24

4.3. ACCESS TO INTERNAL COMPONENTS:

To access the tank:

Allow to cool. Remove the outer lid. To remove outer lid, undo 4 pozi headed screws.
Ensure that the tank is cool, before removing insulation and inner lid. To remove inner lid, undo 4
butterfly nuts.

Ecoboiler UC10L / Ecosmart UC10L(SHOWN)

Ecoboiler UC4L / Ecosmart UC4L(SHOWN)