Marco Qwikbrew 2 Twin User manual

SERVICE MANUAL
Model: Qwikbrew 2, Version 2, 2004 onwards
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 Tel: [phone]

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Content:
1. Introduction
2. Safety Instructions
3. General description
4. Basic Instructions
4.1 First time operation
4.2 Brewing coffee
4.3 Brew calibration Instructions
4.4 Cleaning
4.5 Descaling
5. Technical data
5.1 Troubleshooting
5.2 Access to internal components
5.3 Main PCB connection and identification
5.4 Probe removal
5.5 Replacing the heating element
5.6 Wiring diagram 2.8Kw
5.6 Wiring diagram 5.6kw
5.7 Parts list QB2 P/N1000379
5.8 Parts list QB2 P/N1000495

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1. INTRODUCTION
The information provided in this manual is intended to assist in the installation and
maintenance of the Marco Qwikbrew 2 Boiler Brewer. 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

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•Read all instructions.
•To protect against electric shock do not immerse cord and plugs in water or other
liquid.
•Do not let cord hang over edge of table or counter; or touch hot surfaces.
•Switch off at mains (unplug from outlet) and turn off water supply when not in use and
before cleaning. Allow to cool before putting on or taking off parts.
•Do not operate any appliance with a damaged cord, plugs, or after the appliance
malfunctions or has been damaged in any manner.
•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.
•Close supervision is necessary when the appliance is used by or near children.
•Do not use the appliance for anything other than its intended use.
•Save these instructions.

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3. GENERAL DESCRIPTION
Qwikbrew 2 –2.8kW
Performance
Coffee output: Half Brew
Full Brew
Hot Water: Immediate Draw
Off
Total Recovery at 2.8kW:
Up to 3.4 litres (6 pints)
Up to 6.8litres (12 pints)
5.7 litres (10pints)
0.48litres/min (0.85pints/min)
Electrical
Connection
230V 2.8kW
c/w 1.5m flex + 13A plug
Plumbing
Fittings
Pressure
0.75” BSP
Food grade inlet hose supplied
5-50 psi (35-345 kPa)
Dimensions
Height
Height incl. Cup Rail
Width
Depth
Depth incl. Drip Tray
705mm
775mm
365mm
440mm
575mm
Qwikbrew 2 –5.6kW
Performance
Coffee output: Half Brew
Full Brew
Hot Water: Immediate Draw
Off
Total Recovery at 5.6kW:
Up to 3.4 litres (6 pints)
Up to 6.8litres (12 pints)
5.7 litres (10pints)
0.96litres/min (1.70pints/min)
Electrical
Connection
Plumbing
Fittings
Pressure
0.75” BSP
Food grade inlet hose supplied
5-50 psi (35-345 kPa)
Dimensions
Height
Height incl. Cup Rail
Width
Depth
Depth incl. Drip Tray
705mm
775mm
365mm
440mm
575mm

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4. Basic Instructions:
Plumbing:
Water pressure: 5 - 50 psi (min.-max.)35 - 345 kPa (min.-max.)
1. Fit a stop valve on a cold water line and attach a ¾” BSP male fitting
2. Connect the straight tail-piece of the flexible hose to the stop valve fitting. Make sure that
pre-attached sealing washer is secure.
3. Connect the right angled tail-piece of the hose to the inlet valve of the brewer (in the base
of the machine); again making sure that the pre-attached sealing washer is secure.
4. Turn on water supply and check that the fittings have sealed.
5. A hose is not a permanent connection so it is advisable to close the stop valve when not in
use for long periods (e.g. weekends/holidays)
For model 1000384 Push Button Rear Delivery, there is an optional drain hose to allow urn
to be emptied into a drain or container by turning the key on the side panel. However the
bunged hose must be replaced with a suitable hose to facilitate this.
For model 1000385, the Coffee and Hot Water output is controlled via Front Push Buttons.
These operate in a “Push and Hold” mode. To drain the coffee urn a key switch is located at
the front on the unit. When operated this key switch will open the Coffee output valve and
allow the coffee urn to drain. A suitable container should be used.
ELECTRICAL
When installing the product, always observe the local regulations and standards.
Products without an electrical plug are to be connected by an authorised professional
installer.

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4.1. First time operation:
1. Check that all installation procedures have been carried out.
2. Switch on the power to the unit by pressing the Power Button (See below); all the LEDs on
the control panel will flash momentarily.
3. The machine will automatically take in water. The ‘Power On’ LED will begin to flash until
water has passed safely above the elements (~ 3 minutes).
4. Heating will begin, and the ‘Power On’ LED will stop flashing and glow.
5. When the water has reached the high level and is up to temperature, the green ‘Ready to
Brew’ light illuminates. The appliance is now ready for brewing and water can be drawn off
from the hot water tap.
QUICK OPERATION INSTRUCTIONS

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4.2. Brewing coffee:
HOT WATER OPERATION
Approx. 5.7L of water is available as an immediate draw-off; after this no water is available
until the machines heat fill cycle has recovered. This is to ensure that any water drawn off is
at the correct temperature.
BREWING OPERATION
1. A brew can be selected any time the green ‘Ready to brew’ light is illuminated.
2. Slide out the coffee filter bowl and place a single sheet of filter paper in the bowl.
3. Put the desired amount of ground coffee into the filter paper. Your coffee supply company
may have pack sizes to suit the brews of your Qwikbrew 2. Depending on the coffee grind
and roast, and on water quality, you may have to adjust these quantities to obtain the
optimum flavour.
4. Level off the surface of coffee by gently shaking the filter bowl.
5. Slide the coffee filter bowl into the guide rails in the brew head and push fully home.
6. Select the correct brew on the control panel by pressing the required Brew Button.
N.B. If you make a mistake press the Power Button to turn the machine off. Wait 3
seconds and turn back on again. Select the correct brew.
7. A 3L brew should take around 4-5min. A 6L brew should take around 8-10min.
8. As soon as possible after brewing –remove the filter paper with the spent grinds.
Note: allow time for all the coffee to drain from the filter bowl before removing.

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4.3 Brew calibration Instructions:
Setting Brew Water Volumes:
When in volume calibration mode you are selecting the overall water flow time for each
brew. The spray head outputs approx. 700mL/minute which is 11.66ml/second. You can
select 1, 2 or all 3 brew volumes in the one calibration session, they can be selected in any
order, e.g. brew 2 could be the lowest or highest volume depending on when you press the
brew 2 button. So if you want a volume of 3.5L in brew 2 you would press 2 after 5min
(=300sec), (11.66mlx300s=3.5L), see table guide.
To Calibrate Volume:
1. Turn the brewer on by pressing the power button.
2. Press and hold any of the brew buttons for 5+ seconds, your timer should be started
the moment you press the button down. (any brew button can be pressed to enter
calibration mode, e.g. you could press & hold brew 1 if only calibrating brew 3)
3. The power on red LED will blink to show you are in volume calibration mode, no water
will flow at this time.
4. When the desired time has passed as per table 1 below press the desired brew button
1,2,3 to select the corresponding volume for that brew.
5. When all required brews are selected turn the brewer off using the power button to
save your settings.

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(To disable a brew button select a water flow time of less than 10seconds.)
Table 1
WARNING- The urn will overflow at volumes of over 6.1L, if preheating your urn using no
coffee it is best to use a lower volume.
NOTE- * A certain volume of Brew water will be retained in the coffee grinds and so the
Coffee volume will be less than the Brew Water volume. This will depend on the Coffee grind
and weight. Trails will be required to determine this volume. On average 1gram of coffee
absorbs 2ml of water.
Verification of Volume Settings:
1. Select a brew and measure the actual water output, if it is too low or too high a volume
you can recalibrate and extend or reduce your water flow time. e.g. if you set brew 1 to have
a water flow time of 3min you would expect to get 6L (as the flow rate is approx 2L/min), if
you got 6.1L then you will want to reduce it by 100ml –assuming the estimate of 33.3ml per
second of time this would be a 3 second reduction from the original 3mins. So you would go
to water volume settings and select a flow time of 2min 57sec.
2. If you need to recalibrate any brew button follow the calibration instruction for that button.
Once you have recalibrated the required brew button press the power button to save this
new setting. It is not necessary to recalibrate the other brew buttons. Pressing the power
button in calibration mode will only save the settings which have been changed. All
previously saved settings will remain.
3. Recalibration can be carried out on both the Volume Calibration and Brew Time
Calibration settings.

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4.4 Cleaning:
Like any cooking utensils the coffee urn of your Qwikbrew 2 must be cleaned properly and
regularly.
Marco recommends cleaning after each days brewing using a suitable urn-cleansing
compound. Marco’s own brand cleaner is available (Part Number 8000235), instructions are
given on each tub. Your Qwikbrew 2 is supplied with one large urn cleaning brush and one
small sight-glass cleaning brush –to assist thorough cleaning.
The exterior of the 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 when cleaning the front of the
machine.
For machines with Push Button Delivery
For model 1000384 Push Button Rear Delivery. This model comes with an optional drain
hose to allow the user to empty the Urn into a drain or container by turning the key on the
front panel. However some residue can be left in the tap and dispense valve and this residue
should be also drained off prior to performing a new brew. The key should be removed after
use and stored in a safe place to remove the possibility of accidental emptying of Urns.
For model 1000384 Push Button Rear Delivery. This model comes with an optional drain
hose to allow the user to empty the Urn into a drain or container by turning the key on the
front panel. However some residue can be left in the tap and dispense valve and this residue
should be also drained off prior to performing a new brew. The key should be removed after
use and stored in a safe place to remove the possibility of accidental emptying of Urns.

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4.5 Descaling:
The only regular maintenance required is occasional de-scaling.
In common with all coffee brewer manufacturers, service calls resulting from limescale are
not covered by warranty. Fitting a scale reducer is recommended, especially in hard water
areas. Marco can advise on suitable water treatment by contacting [e-mail]
A service agent should descale the machine regularly. Marco suggests that the
machine be descaled every 3 months if the unit is in a hard water area. In soft water
environments every 6 months should suffice.
5. Technical data:
5.1 Troubleshooting:
The Marco Qwikbrew 2 uses an electronic diagnostic system to help determine faults. If an
error is detected a sequence of flashes is displayed through the POWER light.

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Fig.1 –Qwikbrew Overview –External components
Description
Description
1. Cup Rail - 1801510
8. Label Bottom Marco QB2 Single- 1900700
2. Label Header Marco - 1900690
9. **Only for machines with keyswitch capabilities Switch
keylock 3 position -1501727
3. Basket complete - 2300087
10. Tap Coffee - 2100295
4. Urn Lid - 2300350
11. Tap Hot Water - 2100275
5. Panel Top Qwikbrew 2- 1801531
12. Curved Panel
6. Panel Service Qwikbrew 2- 2200466
13. Drip Tray Complete (255mmX186mm)- 2300299
7. *If the machine has a keyswitch use:
Label QB2 3Brew w/ keyswitch -1900711
For machines without a keyswitch use:
Label QB2 3Brew -1900712
1
2
5
3
4
7*
8
6
9**
10
11
12
13

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Fig.2–Qwikbrew Overview –Internal components
Description and Part Number
Description and Part Number
14. Probe Brew Level - 2300310
21. Terminal 6mm - 1502000
15. Probe High Level - 2300300
22. Tee Plastic Overflow - 1801250
16. Probe Low Level - 2300320
23. Pump Nikkiso - 1501540
17. Sight Glass - 1700260
24. Inlet Solenoid Valve –1502190
18. Transformer 24V/220V 50VA -1502140
25. Element 2.8kW 230V –1500975
19. LED PCB Qwikbrew - 1600447
26. Contactor 240V Benedikt,Jager - 1500840
20. Terminal 6mm - End Stop -1502040
27. P.C.B. Ecoboiler Control Rev 4.0 -1600371
14
15
16
17
18
19
20
21
23
27
26
24
22
25

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5.2 Access to internal components:
The Qwikbrew 2 has been designed with ease of service in mind. All the components
(PCB’s, inlet solenoid, probes, pump and element) are accessible from the front of the
machine.
Switch off and unplug machine.
Remove the two mounting screws positioned in the plastic service panel (near the tap
spigots). Pull the bottom of the plastic service panel away from the curved steel panel. Push
the service panel down towards the counter, to release the tongue (top edge), from the
plastic body. Gently lift away from the taps (the display board is still connected to the
machine!)
Remove curved steel panel by levering the top edge out first.
Fig.7 –Plastic Service Panel
Plastic Service Panel
Mounting Screws

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5.3 Main PCB connection identification
3-Brew Main PCB 1600371
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
16
17
1
2
3
4
5
7
6
6
11
13
14
15
19
8
9
10
12
19
18

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5.4 Probe removal:
The Qwikbrew 2 has 3 level probes (low level, high level and brew level).
Note: Tank does not have to be drained to remove any probes.
The probes and bracket are sealed against the wall of the tank with 2 M6 nuts
Please see Fig 1 below for part identification:
Low Level Probe assembly - 2300320
The low level probe is mounted on the sight glass side of the machine, and is connected to
the Brew Board PCB with a yellow wire.
High Level Probe assembly - 2300300
The high level probe is mounted in the top centre of the tank, and is connected to the Brew
Board PCB with an orange wire.
Brew Level Probe assembly - 2300310
The brew level probe is mounted on the tank near to timer PCB, and is connected to the
Brew Board PCB with a red wire.
5.5 Replacing the Heating element:
•Switch off the machine and remove the plug from the socket. Drain the tank using
the drain valve at the front of the machine.
•Unscrew the 8 M6 nuts that clamp the clean out door against the tank wall. Pull
clean out door back and check element.
•Note the position of the red silicone o-ring - remove and discard. Remove element
by sliding one leg out at a time.
•Replace in reverse order. Use a new red silicone O-ring (1800770). Do not over-
tighten M6 nuts. Check that the clean out door is sealed at temperature before
leaving site.
Please see Fig 1 below for part identification

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Fig 1

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5.6 WIRING DIAGRAM 2.8KW