Unic Mira Instruction Manual

1
RB9002 MARCH 2014 EDITION

2
Contents list
1.SAFETY ADVICES……………………………………………………………………………………. 4
2.IMORTANT NOTES…………………………………………………………………………………… 4
3.PREPARATION OF THE SITE………………………………………………………………………. 5
Unpack the machine .............................................................................................................. 5
Install the machine and preparation of the site ...................................................................... 5
4.HYDRAULIC CONNECTION………………………………………………………………………….5
5.ELECTRIC CONNECTION…………………………………………………………………………… 6
Power connections................................................................................................................. 6
Wiring diagrams..................................................................................................................... 6
6.STARTING-UP………………………………………………………………………………………….7
Filling the boilers.................................................................................................................... 7
Steam boiler ....................................................................................................................... 7
Internal boilers.................................................................................................................... 7
Heating................................................................................................................................... 7
7.CHECKS AND ADJUSTMENTS…………………………………………………………………….. 8
Temperature adjustment by means of the electric pressure controller .................................. 8
Pressure-release valve adjustment........................................................................................ 8
Pump-pressure adjustment.................................................................................................... 9
Coffee grinding adjustment....................................................................................................9
8.PROGRAMING OF THE DIFFERENT COFFEE QUANTITIES IN THE CUP………………… 9
2 Cups electronic box (d2 type) ........................................................................................... 11
Use of the doses to be programmed................................................................................ 11
Configuration parameters................................................................................................. 11
Modification of the configuration parameters.................................................................... 11
3 Cups electronic box (d3 type) ........................................................................................... 12
Use of the doses to be programmed................................................................................ 12
Configuration parameters................................................................................................. 12
Modification of the configuration parameters.................................................................... 12
9.HOT WATER-STEAM BOX, STEAMAIR OPTION……………………………………………….13
Hot water – steam box.........................................................................................................13
Use................................................................................................................................... 13
Programming.................................................................................................................... 13
SteamAir option.................................................................................................................... 13
Components..................................................................................................................... 14
Use................................................................................................................................... 14
Programming.................................................................................................................... 15

3
10.CLEANING AND MAINTENANCE………………………………………………………………….16
After each use...................................................................................................................... 16
Steam outlet tube: ............................................................................................................16
Daily..................................................................................................................................... 16
Before service or after several hours of inactivity:............................................................ 16
After service:..................................................................................................................... 16
Weekly ................................................................................................................................. 17
Cleaning with detergent tablet (automatic cycle).............................................................. 17
Filter holder....................................................................................................................... 18
Overflow tray: ................................................................................................................... 18
Body: ................................................................................................................................ 18
Water Softener..................................................................................................................... 19
Water Softener Regeneration: how?................................................................................ 19
Water Softener Regeneration: when?.............................................................................. 20
11.CONNECTION TO A COMPUTER SYSTEM……………………………………………………...21
Generalities.......................................................................................................................... 21
Machine preparation ............................................................................................................ 21
12.DISPLAYED FAILURES……………………………………………………………………………..23
Problems in connection with the electronic boxes’ control button........................................ 24
Fuse problems ..................................................................................................................... 24
Dosage problems................................................................................................................. 25
105-second safety system of the coffee unit.................................................................... 25
Metering safety system..................................................................................................... 26
Dosing device safety system............................................................................................ 27
13.OTHER FAILURES………………………………………………………………………………….. 28
Hydraulic problems of the coffee unit................................................................................... 28
Doses lighter than initially set........................................................................................... 28
Dripping outside infusion periods ..................................................................................... 28
An insufficient infusion pressure....................................................................................... 29
A wrong decompression process ..................................................................................... 29
Problems in connections with the level regulation ............................................................... 30
The steam boiler is flooded .............................................................................................. 30
The boiler is empty........................................................................................................... 30
Insufficient or no heating process ........................................................................................ 31
Impossible programing......................................................................................................... 31
14.TECHNICAL CHARACTERISTICS…………………………………………………………………32

4
1.SAFETY ADVICES
- This appliance 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 appliance by a person responsible for
their safety.
- Children should be supervised to ensure that they do not play with the appliance.
- This appliance is intended to be used only for its specific purpose.
The manufacturer shall not accept any liability for damages due to improper or wrong use.
- Access to the service area is restricted to persons having safety and hygiene knowledge with
practical experience of the appliance.
- Before plugging in or unplugging the power cord, place the main switch to position “0”.
- If the power cord is damaged, it must be replaced by the manufacturer, its service agent or similar
qualified persons in order to avoid a hazard.
- For electrical safety, be sure the appliance is correctly earthed.
The manufacturer shall not accept any liability for damage due to faulty earth.
- Only a qualified technician is allowed to access the internal parts of the appliance for
maintenance and service operation.
- Be careful of hot surfaces such as: cup warmer, group heads, hot water and steam outlets.
- Do not expose oneself to steam or hot water flow.
2.IMORTANT NOTES
- This appliance is intended to be:
Placed on an horizontal and stable surface
Used in an ambient temperature between 5°C and 35°C (41°F – 95°F).
Installed to comply with the national rules that may be applicable.
Connected to a water system with pressure ranging from 1 to 8 bar
(0.1 to 0.8 Mega pascal)
- Before connecting the electrical supply, verify that the electrical network comply with the data
plate of the appliance.
- For more details about installation, adjustments and connections, please refer to the installation
guide or the technician guide.
- This appliance must not be exposed to water jet or splash.
- Be careful not to block the air inlets with towels or other items.
- If the appliance has to be stored with ambient temperature less than 5°C (41°F), the water circuit
(boiler – pipes) should be emptied.

5
3.PREPARATION OF THE SITE
The machine is delivered in a cardboard box screwed onto a wooden pallet.
Unpack the machine
- Cut the tightening strap with shears.
- Open the cardboard box and take the accessories’ container out.
- Undo the screws by slightly inclining the cardboard box.
- Take the machine out of the cardboard box and put it on wooden blocks.
- Remove screws and washers used for transport.
Install the machine and preparation of the site
- Put the machine in its final place and level it up with the help of rubber washers, as necessary.
- The machine must be placed on a horizontal surface.
- There must be a free space of 5 cm behind the machine and the ventilation holes on the top of
the machine must not be obstructed.
- A socket with a ground system and a water-supply pipe corresponding to the characteristics of
the machine are sufficient for connecting.
- Set up cup racks after making adjustments.
- The machine is not to be operated without its legs.
4.HYDRAULIC CONNECTION
A water softener is necessary over 5°KH.
Water Intake
- Pressure ranging from 0 to 10 bar
- Connection : 3/8 gas female socket (male plug on
machine)
- Pipe with a minimum 8 mm internal diameter
- Stop valve to be set up.
Drainage
- Connection : 3/4 gas female socket (male plug on
machine)
- Pipe with a minimum 12 mm internal diameter.

6
5.ELECTRIC CONNECTION
- None of the switches must be in ON position.
- Make sure that the voltage, frequency and power values marked on the descriptive plate of the
machine are in conformity with the electric network mains.
- Mount a plug on the end of the machine cable (plug with grounding: green/yellow wire).
Power connections
Set the machine switch to Position .
The machine is delivered with a cable consisting of 5 numbered wires.
Make sure that the machine connection matches the available voltage network (see wiring
diagrams hereunder). Bring the necessary modifications into the supply cable and the plug located
near the electrically-driven pressurestat.
Wiring diagrams
N1 L1 L2 L3
N0 1 2 3
MAIN
COMMUTATOR
BORNIER
TERMINAL PLUG
PRESSOSTAT
PRESSURESTAT
RESISTANCE
HEATING ELEMENT
14
26
35
4 5 6 THERMOSTAT
SECURITE RESISTANCE
HEATING ELEMENT
SAFETYTHERMOSTAT
156
1 2 3
P1 P2 P3
CABLE
CORD
N2 3
4
ALIMENTATION BOITIERS
ELECTRONIQUES ET
TRANSFORMATEUR NEON
FEEDING ELECTRONIC
BOXES AND NEON
TRANSFORMER
BORNIER
TERMINAL PLUG
PRESSOSTAT
PRESSURESTAT
THERMOSTAT
SECURITE RESISTANCE
HEATING ELEMENT
SAFETY THERMOSTAT
CABLE
CORD
MAIN
COMMUTATOR
BORNIER
TERMINAL PLUG
PRESSOSTAT
PRESSURESTAT
THERMOSTAT
SECURITE RESISTANCE
HEATING ELEMENT
SAFETYTHERMOSTAT
CABLE
CORD
N Ph Ph1 Ph2 Ph3
N Ph1 Ph2 Ph3
380 / 400 / 415V TRI + N+ 200 / 230 / 240 V MONO + 200 / 230 / 240VTRI +
4 5 6
NL1PEL3 L2
N 1 2 3
14
26
35
4 5 6
1 2 3
P1 P2 P3
4 5 6
N 1 2 3
N1 L1 L2 L3
N0 1 2 3
14
26
35
4 5 6
1 2 3
P1 P2 P3
4 5 6
N 1 2 3
N 1 2 3
N 1 2 3
N1 L1 L2 L3
N0 1 2 3
MAIN
COMMUTATOR
N 1 2 3
15
64
2
3
NL1 PE L3 L2
1
25 63 4
N
NL1PEL3 L2
RESISTANCE
HEATING ELEMENT
ALIMENTATION BOITIERS
ELECTRONIQUES ET
TRANSFORMATEUR NEON
FEEDING ELECTRONIC
BOXES AND NEON
TRANSFORMER
RESISTANCE
HEATING ELEMENT
ALIMENTATION BOITIERS
ELECTRONIQUES ET
TRANSFORMATEUR NEON
FEEDING ELECTRONIC
BOXES AND NEON
TRANSFORMER
N = NEUTRE / NEUTRAL
1 = PHASE MARRON / BROWN
2 = PHASE NOIR / BLACK
3 = PHASE GRIS / GREY
A : Electronic box
B : Switch
IN ALL CASES, THE GREEN/YELLOW WIRE
MUST BE EARTHED

7
6.STARTING-UP
Filling the boilers
Turn on the shutoff valve.
Plug in the machine.
Set the charge switch to Position 1. (Do not set the charge switch to
Position 2 until the boiler has been filled).
ON/OFF SWITCH
Steam boiler
- As soon as the machine is turned on, the filling takes place automatically.
A safety is programmed, if the filling does not occur before 3 minutes. In this special case, the
electrovalve and the pump are cut off.
The light blinks.
- Check the hydraulic connection of the machine.
- Switch off and switch on the machine by setting the charge switch to Position 0 then to position 1.
- The filling starts again and lasts 3 minutes.
Internal boilers
- With the filter holder in place, press the continuous/stop key of each unit.
As soon as the water flows correctly from the spout (with no air), press the same key again to stop
the water.
Heating
When the boilers have been filled, set the charge switch to Position 2.
When the operating temperature of the machine is reached, the pressure-gauge must indicate a
pressure of 0.9 to 1 bar (red scale).
It is better to keep the machine switched on permanently and the filter-holders inserted in
machine even when you are not making coffees.

8
7.CHECKS AND ADJUSTMENTS
To get to the various adjustments, the cup rack, the rear panel or the sides must be removed.
Proceed as follows:
CUP RACK:
Remove the grids, then undo the 4 upper
screws. And remove the cups rack.
REAR PANEL(S):
Undo the 2 upper screws located inside the
machine at its back (under the cup rack); then
make the panel(s) glide vertically outwards.
SIDES:
On each side, undo 1 screw under the front
panel; pull the side to the back.
Temperature adjustment by means of the electric pressure
controller
The pressure controller (pressurestat) is located at the
back.
Dismantle the cup rack; remove the cover of the
pressure controller to get to its adjustment screw.
-TIGHTEN to LOWER the temperature
-LOOSEN to RAISE the temperature
The pressure-gauge (red scale) must
indicate a pressure of between 0.9
and 1 bar which corresponds to a
temperature of 120°C.
Pressure-release valve adjustment
MIRA Model
The HP valve is located on the right side of the machine: it
is necessary to dismantle the sides and the rear panel.
The valve is set above the pump; its adjusted pressure
must just be greater than the water network pressure.
Recommended value: 7 to 8 bar (green scale of the
pressure gauge).
- If the valve opens ABOVE 8 bar: LOOSEN
- If the valve opens BELOW 7 bar: TIGHTEN
Use a pin-wrench; after the adjustment, do not forget to
block the counter nut.

9
TWIN, TRI and QUATTRO MIRA Models
The HP valve is located in the lower part at the left rear of
the machine: it is necessary to dismantle the left side.
The valve must open at about 13 bar (green scale of the
pressure gauge).
- If the valve opens ABOVE 13 bar LOOSEN
- If the valve opens BELOW 13 bar TIGHTEN
Use a pin-wrench; after the adjustment, do not forget to
block the counter nut.
Pump-pressure adjustment
In infusion, the pressure must be between 9 and 10 bar (pressure gauge - green scale).
MIRA Model
The pump is located in the left side
and the adjustment must be done from
the same side of the machine.
TIGHTEN to INCREASE the pressure.
LOOSEN to DECREASE the pressure.
TWIN, TRI and QUATTRO MIRA Models
The pump is located in the right side
and the adjustment must be done from
the same side of the machine.
TIGHTEN to INCREASE the pressure.
LOOSEN to DECREASE the pressure.
Coffee grinding adjustment
- Wait until the machine has reached the proper temperature (0.9 to 1 bar).
- The fineness of the grinding determines the time it takes for hot water to pass through the
coffee.
- The passage-time is usually checked by using the 2-cup filter, with 2 doses of ground coffee.
- The average passage-time for 2 cups (6 to 7 cl. per cup) is from 30 to 35 seconds.
- If the passage-time is shorter, grind the coffee finer.
- If the passage-time is longer, grind the coffee coarser.
- For a good cup of coffee, use at least 6 gr. of ground coffee per cup.
8.PROGRAMING OF THE DIFFERENT COFFEE QUANTITIES IN
THE CUP

10
P1 P2 P3 P4
P5
The keys from P1 to P4 can be programmed.
The multiple doses (1, 2 or 3 cups) are calculated automatically from the programming of one of
them on each box.
1 Set the machine switch to Position 0.
2 Keep the key P5 pressed and put again the machine on.
Display of Pn then Pc and Pr by pressing several times the key P5
3 Pc = CALCULATED PROGRAMMING
Insert a filter-holder ( with coffee ) into the unit
Install cups
P5 Display Pc
P1 à P4 Select the dose to be programed (2c for example)
P5 Start the infusion cycle
P5 Press again to stop when the amount of coffee desired is correct.
Display of the corresponding digital value ( from 00 to 99 )
Repeat operation at 3 for the other doses ( 2C for example)
4 Pn = DIGITAL PROGRAMMING
Quick programming without coffee and/or values carried forward on other units.
P5 Display Pn
P1 à P4 Select the dose to be programed
P5 Display of the digital value of the selected dose
P1 Increase the value
P4 Reduce the value
P5 Memorize the new value
Repeat operation at 4 for the other doses
5 Pr = MANUAL PROGRAMMING
Same proceeding as in calculated programming Pc.
The manual programming doesn't calculate the other doses (1, 2 or 3 cups), only the
programed dose is modified.
Caution: any new programming ( Pn or Pc ) cancel ALL previous programed values.
6 Wait until the program mode is automatically inactivated (from 10 to 15s), or switch off
and on again the machine.