Marco MIX Series User manual

1000870,871,875,878,879,880,887 MIX Service Manual.b
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MIX Boiler & Font Range –
Service Manual
1000870# 1000871# 1000875#
1000880# 1000887# 1000878 1000879
2300268
www.marcobeveragesystems.com
Ireland Tel: [phone]
UK Tel: [phone]

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CONTENTS:
1. Introduction …………………………………………………………………………………………………………………… 3
2. Safety Instructions …………………………………………………………………………………………………………. 3
3. Specifications …………………………………………………………………………………………………………………. 4
4. Installation …………………………………………………………………………………………………………………….. 5
4.1 Mix Boiler Installation ……………….……………………………………………………………………….….. 5
4.2 Mix Font Installation ……………………………………………………………………………….…………….. 7
5. Boiler Setup .………..………………………………………………………………………………………………………… 11
6. Overview & Operation ……………………………………………………………………………………………………. 12
6.1 PB versions – Multi-temp …………………..………………………………………………….………………. 12
6.2 PB versions – single-temp …………………………………………………………………………..………….. 14
6.3 Tap versions …………………………………………………………………………………………………………. 16
6.4 UC versions …….…………………………………………………………………………………………………….. 18
6.5 Mix Font ……………………………………………………………………………………………………………….. 20
7. Menu Navigation ……………………………………………………………………………………………………………. 21
7.1 User Settings …………………………………………………………………………………………………………. 21
7.2 Advanced Settings …..…………………………………………………………………………………………….. 22
7.3 Engineering Settings ….………………………………………………………………………………………….. 24
7.4 Dispense Calibration ……………………………………………………………………………………………… 25
8. Routine Maintenance/Internal Access …………………………………………………………………………… 26
8.1 Top Lid Removal ……………………………………………………………………………………………………… 26
8.2 Side Panel Removal …..…………………………………………………………………………………………….. 26
8.3 Draining the Tank ….…………………………..………………………………………………………………….. 27
8.4 PCB Replacement ……………………………..………………………………………………………………….. 28
8.5 Dispense Solenoid or Pump replacement ………………………………………………………………. 29
8.6 Dispense Tap removal …..……………………………………………………………………………………... 30
8.7 Tank Lid Sub-Assembly Removal ….……………………………………………………………………….. 31
8.8 Heater Element Removal …………………………………………………………………………………….. 33
8.9 Thermistor & Level Probes - Cleaning & replacement ……………………………………….…. 33
8.10 Triac Replacement …..…………………………………………………………………….………………..…… 34
8.11 Inlet solenoid Replacement ….………………………………………………………………………………. 35
8.12 Pump Power Supply (UC versions only)………………………………………………………………….. 36
8.13 Descaling the Tank …..……………………………………………………………………………………..…….. 37
8.14 Changing the Filter …..……………………………………………………………………………………..…….. 38
9. Diagnostics/Trouble Shooting ……………………………………………………………………………………….. 39
10. Electrical Schematics …………………………………………………………………………………………………….. 40
11. Exploded parts drawings and parts list ……………………………………………………………………………. 43

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1. INTRODUCTION
The information provided in this manual is intended to assist in the installation and maintenance
of the Marco Mix Boiler range. 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
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 must be placed/installed on a horizontal flat stable surface.
• The ambient temperatures this appliance should operate within are 5 °C - 35 °C.
• This appliance may be placed in self-service areas if attended to by trained personnel.
• Risk of flooding, the hose supplied with the boiler 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 etc.
• 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 any wires are damaged, such wires can only be replaced by experts or profes-
sional after service staff from the manufacturer after service department or similar function
departments.
• 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.

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3. SPECIFICATIONS
BOILERS:
MIX PB3 -
1000870
MIX T8 –
1000871
MIX PB8 –
1000875
MIX UC3 -
1000880
MIX UC8 –
1000887
Performance
Immediate Draw Off (L)
Total Hourly output
(L/hr)
3L
28
8L
28
8L
28
3L
28
8L
28
Electrical
Mains Connection
Earthed Mains Plug to IEC 230vac
(UK – 3-Pin Plug, BS1363)
(EU – CEE7 Schuko)
(US/Canada - NEMA L6-20P)
Rating
@230V
2.8kW
12.15A
Plumbing
Fittings
Required Pressure
0.75” BSP (or 3/8” NPT for US versions) food grade inlet hose
supplied.
5-50 psi (35-345 kPa)
Dimensions
Height (mm)
Width (mm)
Depth (mm)
420
210
440
590
210
505
590
210
440
440
210
385
610
210
385
FONTS:
MIX Single Button
Font - 1000870
MIX Three Button
Font - 1000870
Drip Tray
Dimensions
Height (mm)
Width (mm)
Depth (mm)
242
38
132
242
38
132
35
125
170

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4. INSTALLATION
4.1 Mix Boiler Installation
Electrical Installation:
•Electrical specification: 2.8kW-230VAC-50/60Hz
•A moulded 13A IEC power cord is provided. This should be plugged into the IEC connection on the
rear of the boiler and plugged into a suitable 13A power outlet.
•When installing the machine, always observe the local regulations and standards.
Plumbing Installation:
•Mains water pressure required (limits): 5-50psi (35-345kPa) 0.5 – 5.0 bar
•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).
•For US versions use 3/8” NPT male fitting.
•Connect straight tailpiece of the 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 litres through.
•Connect right-angled tailpiece of the hose to the inlet valve of the boiler (3/4" BSP). Make sure the
sealing washer is fitted here also.
•Turn on water and check for leaks.

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4.1 Mix Boiler Installation (cont.)

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4.2 Mix Font Installation

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4.2 Mix Font Installation (cont.)

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4.2 Mix Font Installation (cont.)

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4.2 Mix Font Installation (cont.)

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5. BOILER SETUP
5.1 Operating Boiler for the First Time
•Check that all installation procedures have been carried out.
•Ensure water valve is on.
•Plug boiler into suitable socket.
•Turn on the power switch.
•The “wait” progress circle will be visible on the screen and the machine will fill to a safe level,
above the elements, before heating.
Multi Temp versions Single Temp versions Tap Versions
•The “Ready” tick with come up on screen when the machine is full and up to normal operating
temperature – typically 6 mins for 3L and 16 mins for 8L versions respectively.
•The boiler is now ready for use – the display will show the Water Temperature and the
“Ready” status tick.
Multi Temp versions Single Temp versions Tap Versions
•The Boiler may now be used to dispense hot water to the pre-set factory settings.
•NOTE: Because the boiler is electronically controlled no priming is necessary.
•The element cannot switch on until a safe level of water is reached.

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6. OVERVIEW & OPERATION
6.1 PB Boiler – Multi-temp Operation

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6.1 PB Boiler – Multi-temp Operation (cont.)

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6.2 PB Boiler – Single Temp Operation

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6.2 PB Boiler – Single Temp Operation (cont.)

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6.2 Tap Boiler – Operation

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6.2 Tap Boiler – Operation (cont.)

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6.3 UC Boiler – Operation

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6.3 UC Boiler – Operation (cont.)

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6.4 Mix Font – Operation