Instruction Manual
PID Temperature Controlled Espresso Machine
*
Patents pending
Precisia SYL-100
Version 1.0w
Auber Instruments
7
30 Culworth Manor
Alpharetta, GA 30022
770-783-3568
www. com
precisiacoffee.
*
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Description of Components . . . . . . . . . . . . . . . 6
Initial Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Prep
Location Recommendations
Initial Espresso Brewing
Cleaning the Parts
aring the Machine . . . . . . . . . . . . . . . . . . . . 11
Operating Instructions . . . . . . . . . . . . . . . . . . . . 12
Cappuccino or Latt
Steaming/Frothing Mi
Tips & Tricks
Brewing Espresso
e
lk
PID Temperature Control . . . . . . . . . . . . .. . . 21
Routine Cleaning and Maintenance . . . . . . . . . . 22
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 25
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
1
Introduction
Precisia SYL-100
Thank you for purchasing the Precisia SYL-100 espresso and cappuccino machine. We
sincerely appreciate your decision and trust that our machine will meet your expectations
in both the quality of the espresso produced and the high value of our product. While we
are delighted that you may be anxious to brew some espresso or make a delicious
cappuccino, a few minutes of your time reading through this manual now will only serve
to enhance your espresso experience in the months and years ahead. In particular, we
would urge you to read through the safety warnings below. Although brewing and
drinking espresso is a delightful experience, the process involves hot water under high
pressure and your safety is paramount.
SAFTY WARNINGS
• The power source must meet the specifications of the coffee machine with correct
voltage and proper grounding connections.
• Do not attempt to remove the portafilter holder during or immediately following the
brewing operation. Very hot water under high pressure will spray out possibly
causing injury to the user. Wait 15 seconds after brewing stops before removing
the portafilter assembly.
• Do not touch the metal tubing of the steam wand nozzle during and right after
frothing milk. Do not touch the bottom or sides of the group head when the
machine is on. These surfaces are very hot.
• If an abnormal display or noise is observed, turn the machine off, unplug the
power cord and contact the manufacturer before using it again.
• Do not move the machine when water is present in the reservoir. Water may spill
inside the machine causing permanent damage or electric shock.
• Clean the machine only when it is cool and unplugged.
• Empty the water reservoir if the machine will be subjected to freezing
temperature.
• Do not allow children to operate machine unless they are under adult supervision.
2
Our Mission
Precisia Coffee is dedicated to manufacturing precision temperature controlled home
espresso machines. It is widely recognized that proper brewing water temperature is
one of the most important factors affecting the taste of the espresso. If the water
temperature is too low, it will not completely extract the aroma from the coffee.
However, if the water temperature is too high, it will extract unwanted bitterness.
Experts believe that the brewing temperature for any particular blend of espresso beans
(optimum is typically between 196 F and 204 F) should be maintained within one degree
during the extraction process in order to produce the best tasting espresso. In addition,
each individual may have their own taste preferences of that coffee which can be
affected by the brewing water temperature. Most home espresso machines use a
simple snap action on-off thermostat as a means of controlling water temperature. This
can allow for a fluctuation of up to 40 degrees (Fahrenheit) in the brew water
temperature and is the primary reason why most espressos made in the home cannot
equal the taste of an espresso brewed in a commercial coffee cafe.
Precision Temperature Control
The Precisia SYL-100 incorporates a custom developed temperature control system
utilizing a PID algorithm that can maintain the water temperature for brewing your
espresso within one degree of the selected value. Users can easily change the water
temperature to suit their own taste. The actual temperature of the boiler is displayed by
a bright red LED display with a green light signifying when the water is ready for brewing
your espresso.
Home espresso machines usually require a rapid heat up speed. This requirement
makes it difficult to obtain precision and stable temperature control, especially for a
stainless steel boiler/group head. Precisia has achieved superior performance with
these usually-contradictory parameters through innovative hardware and software
design. The system generally takes about 5 minutes to heat up from room temperature
and less than 2 minutes between each shot.
Precision Shot Volume Control
The shot volume of the espresso can be easily adjusted to suit the user’s preferences.
The shot volume is adjusted by varying the pumping time with one-second accuracy.
3
Stainless Steel Group Head
Precisia uses a stainless steel grouphead for better taste and uniform temperature rather
than the more commonly used brass group heads which have the tendency to absorb
coffee oils and negatively affect the taste.
With Precisia, you are in total control of your espresso!
Specifications
Dimensions (h x w x d): 12.0 x 11.2 x 8.5 in. (30.5 x 28.5 x 21.6 cm)
Weight: 11 lb (5.0kg)
Power Requirements: 115-120 VAC, 60 Hz, 10.5 A
Heater Power: 1000 W
Pump Power: 50 W
Pump Pressure: 14-16 Bar
Water Reservoir Capacity: 42 ounces (1.25 L)
Drip Tray Capacity: 15 ounces (.44 L)
Temperature display units: degrees F or degrees C
Temperature display range: 32F to 302 F (0 C to 150 C)
Pump timing range: 10 to 40 seconds
Espresso temperature range: 140 to 212 F (60 to 100 C)
Steam temperature range: 230 to 257 F (110 to 125 C)
Factory Default Settings
Pump timing (SEC): 14 seconds
Espresso brew water (ESP): 208 F (97.8 C)
Steam temperature (CAP): 240 F (115 C)
4
Unpacking the Precisia SYL-100
The Precisia SYL-100 comes nicely packaged in a sturdy cardboard box with formed
styrofoam inserts to prevent damage due to shifting during transit.
Carefully inspect the exterior packaging of the machine for any signs of damage during
transit. Pictures of transit damage are invaluable should it be necessary to file a claim
with the delivery service or carrier.
The machine itself is wrapped in an easily removable plastic bag. After removing the
machine from its box and removing the plastic bag, remove the blue-colored protection
film from the warming plate and replace the plate back on the top of the machine.
All of the filter baskets and portafilter are in the styrofoam block tightly packed beneath
the control panel. Slightly rotate the steam nozzle outwards and push the styrofoam to
the left to get it out. The steaming/frothing thermometer is inside the water reservoir.
CAUTION
Do not leave the bag where younger children can easily
access it.
A good idea would be to store the plastic bag and all other packaging materials back in
the Precisia box for later use.
Visually inspect the machine for any damage due to shipping and handling.
5
Description of Components
Control Panel. The control panel serves as the interface between you (the barista) and
your espresso machine. Here you can turn the machine on and off, set the temperature
parameters for brewing espresso and steaming/frothing milk, and the amount of time the
pump operates for brewing espresso shots.
6
Warming plate. Placing cups on this plate will help keep them warm. Pre-warmed
cups will make the espresso taste better by increasing the life span of the delicious
crema foam formed on top of the espresso liquid.
emovable Water Reservoir. This easily removable and cleanable reservoir holds 42
R
ounces of water for brewing coffee and producing steam for frothing milk. While the
water level can be easily seen from either the front or the side of the machine, your
Precisia is equipped with a magnetically activated low water level switch. This swit
ch
automatically turns the power off to both the pump and heating element to prevent
damage to the machine when the water level reaches a preset low level. A filtered
water source, e.g. Brita pitcher or equivalent, is highly recommended for the water tha
your machine will use for brewing your espresso.
he water tank slides out easily for refilling when necessary or it can be partially slid out
T
as illustrated if refilling from a handy pitcher. Place the two silicone tubes in the
container before sliding it back. When moving the espresso machine, the reserv
oir
either must be emptied or removed to prevent water from being spilled inside the
machine.
plash Grid and Drip Tray. The drip tray assembly consists of two molded pieces; the
S
top grid for holding espresso or cappuccino cups while brewing and the collector tray
itself that catches any spilled liquid. Although they are a snug fit to the base, both ca
be easily removed for cleaning using warm soapy water.
t
n
ortafilter Assembly. The portafilter assembly consists of the portafilter itself and your
P
choice of three espresso baskets. The height and internals of each basket differ
7
depending upon either the method or amount of espresso you plan or brewing. T
he
portafilter handle is equipped with a sliding lock that holds the basket in place when
removing spent coffee grounds or a used espresso POD.
stall the portafilter assembly into the espresso machine by holding the filter assembly
In
level with the handle approximately 60 degrees to the left (8:00 o’clock position).
Unlock the filter lock with your thumb. Raise the assembly until the front is in the
grouphead hole. Turn the portafilter assembly counterclockwise for approximately 6
degrees (until the handle is at the 6:00 to 5:30 position or until it feels snug). Check t
0
o
make sure the portafilter assembly is correctly installed. To remove the filter assembly
from the espresso machine, turn the handle of the filter assembly clockwise for 60
degrees and then drop it slightly to remove. Engage the filter basket lock to retain
the
filter basket in the portafilter and dispose the spent coffee grounds or espresso POD in a
convenient trash container.
team Valve, Frothing Enhancer Device and Nozzle. These are used to produce
S
steamed and frothed milk for delicious cappuccinos or lattes. Press the CAP/▼ key
and wait until temperature reaches your set value (240 F is the default setting) and for
the ready light to stop flashing. Place your steaming pitcher, filled to 1/4 - 1/3 capacity
with fresh cold milk, underneath the steam nozzle. Open the steam valve by turning the
steam knob counterclockwise. After the milk is frothed to your satisfaction, close the
valve by gently turning the knob clockwise.
8
CAUTION
After steaming, the steam wand is very hot. Be extremely careful with
your hands and fingers when moving (rotating) the high temperature
steam wand.
Please select a stainless steel steaming pitcher of proper height and capacity.
Recommended steaming pitcher sizes range from 12 to 20 ounces in capacity. Fill the
steaming pitcher approximately 1/4 to 1/3 of its capacity with the fresh chilled milk of your
choice. This will ensure sufficient frothed milk for two delicious cappuccinos or lattes.
After you are finished the frothing operation, clean the nozzle internally by briefly
releasing a small burst of steam into a wet cloth and then wipe the outside of the nozzle
with that same wet cloth.
Accessories:
easuring scoop. A combination measuring scoop and tamper is provided with your
M
espresso machine. Each level spoon of coffee powder provides the proper amount of
coffee (approximately 7 grams) for a single shot of espresso. Use the flat end to tamp
the espresso grinds level with approximately 8 -13 lbs force after putting it in the coffee
filter basket.
ilter baskets for espresso. Two filter baskets for espresso are provided; a single
F
shot basket and a double shot basket. A special filter basket, sized for a standard 45
mm diameter espresso coffee pod, is also provided. It has the same outside
dimensions as the single shot basket for espresso powder but has a white color
ed plastic
ring sitting inside the stainless steel basket. If there is no desire to utilize coffee pods,
this filter basket can be converted to a single shot basket by removing the white plastic
ring and the white o-ring.
teaming/Frothing Thermometer. A stainless steel steaming/frothing thermometer
S
with clip is provided for your use when preparing milk-based drinks.
9
Initial Setup
Cleaning the Parts. Rinse the water container and fill it with filtered water to just below
the 1.25-liter mark. Before sliding the reservoir back into position, place the two silicone
tubes inside the reservoir.
Plug the power cord into a standard 115-120VAC grounded receptacle and note that the
red power indicator LED is lit. If, by some chance, the green LED starts flashing, press
the On/Off button to turn the machine off.
Place a normal coffee cup on the drip tray directly underneath the grouphead shower
screen and turn the machine on. Now press the ESP button to initially fill the boiler with
water. The pump will operate for 14 seconds (this is the default timer setting set at the
factory) drawing water from the reservoir. Repeat this process two more times for a
total of three pumping cycles. You should notice a small change in the sound of the
pump when the boiler is full and water begins flowing from the grouphead shower
screen.
Mount the portafilter assembly to the grouphead. Slide the portafilter basket locking
mechanism back (in the direction of the arrow) and place any one of the three baskets in
the portafilter. Make sure the basket lock remains slid back. Install the portafilter
assembly into the espresso machine by holding the filter assembly level with the handle
approximately 60 degrees to the left (8:00 o’clock position). Turn the portafilter
assembly counterclockwise for approximately 60 degrees (until the handle is at 6:00
o’clock or until it feels snug).
CAUTION
The portafilter assembly cannot be properly installed in the
machine with the basket lock engaged. Attempting to install
the assembly into the machine in this manner may cause
damage to the portafilter assembly or the grouphead or both.
10
With the portafilter assembly installed, press the ESP button which will run the pump for
one cycle (14 seconds).
Press the ESP button once
again to operate the pump for another cycle.
Remove the portafilter assembly from the espresso machine by turning the handle of the
filter assembly clockwise for approximately 60 degrees and then drop it slightly to get it
out.
Replace the basket with another all the new assembly back into the machine.
one and inst
Repeat the two pumping cycles as per the first basket.
Replace this basket with the one remaining baske all this assembly back into the
machine. Repeat the two pumping
cycles as per the first basket.
t and inst
Replenish the water supply in the reservoir as necessary and turn the machine off if it
won’t be used in the next few hours.
Congratulations! You have now successfully cleaned all parts which will contact the
brew water and gained experience in removing and replacing baskets and portafilter
assemblies from the machine. The best is yet to come!
Preparing the Machine
Location Recommendations. Precisia is best located on the kitchen countertop nea
the sink and preferably on the left hand side of the sink because of the location of the
steam wand.
Initial Espresso Brewing. You might want to begin your espresso journey using
because of their ease of use. The cost of the typical espresso pod is around 50 - 70
cents and while this is more e
leanup is inherently a lot easier. Espresso pods are available at national coffee cafes
c
xpensive than using freshly ground espresso beans,
such as Starbucks and food stores such as Whole Foods Market. The pods from
tarbucks are convenient in that they are individually sealed, are available in two
S
different roas
t levels, and are available in a decaffeinated variety.
11
pods
r
Operating Instructions
The control panel is the “link” between you and the machine. We recommend that you
become familiar with the operation of the control panel prior to making any espresso or
spresso based drinks. After operating the Precisia for a few days, most of what
e
follows in this section will become well known and you will be producing d
ne important thing worth remembering is to always start your operations with both the
O
reservoir tank and boiler full with fresh, filtered water.
elicious drinks.
12
Control Panel Operation
The red power indicator LED will be lit anytime the machine is plugged into an electrical
outlet. Press the ON/OFF button to turn the machine on. The Water Temperature
Indicator LED (Green Ready Light) will begin flashing at the rate of 1/second signif
ying
that the boiler is heating up to the set espresso brewing temperature.
The display window will show a rising temperature whi
ch will take about 5 minutes to rise
from room temperature (72-76 F) to the temperature set for espresso brewing (208 F is
the default).
Any time the machine is “on”, the three adjustable parameters of pumping time (SEC),
espresso water temperature (ESP), and cappuccino steaming temperature (CAP) can be
adjusted to suit YOUR preferences. This is done by pressing the “SET” button which
will put the machine into the Parameter Setting mode.
The chart shown below shows the sequence of parameters when the SET key is
pressed:
Flow Chart for Parameter Setting Mode
When the system is in the Parameter Setting mode, the decimal point LED will be
flashing. Press SET to confirm and store in memory changes made to any of the
parameters. If no key is pressed within 8 seconds, the system will automatically return
to the Operation Mode. In this case, any changes made to the last displayed parameter
will not be saved.
13
If a parameter does not need to be changed, press the SET button to advance to the
ext parameter. Changes made to the parameters are stored in non-volatile memory
n
such that even if the machine is turned off and the power cord disconnected, the saved
parameter values are not lost. PID parameters have been locked with an access cod
only available to authorized repair facilities. Unauthorized modifications of these
parameters could result in machine malfunction and will void the warra
nty.
Brewing Espresso
• Check / F
ill the water reservoir with fresh, filtered water and gently slide it back into
the machine.
• Install the portafilter into the machine with the empty basket of your choice in place.
• Turn the machine on and, regardless of water temperature, activate the pump by
pressing the ESP/▲ button until you see water flowing from the portafilter to ensure
that the boiler is full of water.
•
The LED display will show the current temperature (which will begin to rise) and the
green LED will begin flashing at the rate of approximately 1/sec.
• Set espr
esso brewing water temperature and pumping time (this step can be skipped
if there is no desire to change the default values). However, please do not forget to
change the pumping time if you are switching from pods (single-shot- 14 seconds) to
a double-shot basket (19-21 seconds) or vice-versa.
• When the machine reaches set temperature, activate the pump again for one brew
cycle to heat up the installed portafilter and basket.
NOTE
In order to produce the best espresso that Precisia is capable
of, we recommend that you always first “pull a blank shot” of
hot water through an empty basket and portafilter prior to
making a “real shot.” The idea here is to make sure the
boiler is as full as possible and to heat up all the components
in the brew path closer to the temperature they will be
subjec ot
water from the port
ted to when “pulling a real shot.” Shake excess h
afilter and basket prior to loading the
coffee and putting the portafilter back into the machine.
• Remove the portafilter assembly, engage the basket lock, and shake it a few time
over a nearby sink to remove the small amount of water that remains inside.
Remove the basket from the portafilter and reinsert the portafilter back into the
machine to kee
p it hot.
e
s
14
• Load espresso grounds (or an espresso POD) into the filter basket, using one level
spoon for the single-shot filter basket and two level spoons for the double-shot filter
basket. Tamp the grounds level using the combination scoop/tamper, making
that the final, tamped level of coffee in the basket is about 1/16” to 1/8” b
elow the rim
sure
of the basket.
NOTE
If you are using the double shot basket (tw
o level scoops), it
will be advantageous to slightly level and very lightly tamp the
grounds after loading the first scoop into the basket. Set the
pump timing (SEC) to 19-21 se
conds for a double-shot.
• Wipe any poor seal
between t
• Remove t
• Load the p in place by
turning the ition or slightly past
or until it i
• Wait until tly lit, place a
pre-warme /▲ key to start the
stray grounds from the rim of the basket which might cause a
he basket and grouphead sealing ring.
he warmed portafilter and insert the filled basket into it.
ortafilter assembly back into the espresso machine and lock it
assembly until the handle reaches the 6:00 o’clock pos
s snug.
the Ready indicator has changed from flashing to constan
d cup underneath the filter assembly, and press the ESP
pumping cycle.
• Wait a few seconds after pump stops to let the dripping stop.
•
Espresso is ready – ENJOY!
• after the pump stops before removing the portafilter.
Wait about 15 seconds
15
Ti s:
p
1. Precisia’s pump can be started (or stopped) at any time even if the temperature is
not at the set point by simply pressing the ESP/▲ button.
2. The default pumping time is set at 14 seconds for a single-shot (~1.0 oz or 30 ml)
of espresso. The shot volume can vary due to the fineness of the coffee grounds
and/or the amount of coffee grounds used. It is easy to change the pumping
time parameter (SEC) to arrive at the right concentration and amount of espresso
best suited to your taste.
3. The default value of the espresso brewing temperature parameter (ESP) is set at
208 F which is measured on the top surface of the boiler. The temperature of the
water exiting the grouphead is about 8 F lower than the temperature shown on the
display panel.
4. Precisia utilizes brew water pressure to assist in packing the ground espresso to
the correct density point for optimum flavor. Because of this, there is no need to
tamp the coffee very forcefully unless the grind of the coffee is relatively coarse
however, it is important that the grounds be level.
5. The optimum brewing temperature for
different blends of espresso beans can
vary from 195 F to 205 F. Precisia users can easily adjust the temperature to
optimize the flavor for different beans, remembering that the set ESP temperatu
on the display panel is about 8 degrees F above the temperature of the brew
water hitting the coffee.
Ca
ppuccino or Latte
c
A appuccino is made up of espresso, steamed milk, and frothed milk in equal portions.
A la
tte is made up of espresso and steamed milk with a spoonful of frothed milk added
e de up of espresso and
aft r pouring in the steamed milk. The classic cappuccino is ma
ed/frothed milk. Certainly it is ea foamy uniform mixture of steam
a ferences are what really count.
f ll of the foregoing but your preo
asy to find variations
o
Sh uld you steam/froth the milk first and then make the espresso or should you make
16
re
the espresso first? With Precisia, we recommend frothing the milk first and then
reating your espresso but please feel free to try it either way. Experimentation is part
c
f the “fun” in creating your own espresso or espresso based drinks. Our directions,
o
which
m
act
follow, assume you are starting with the machine at room temperature and that the
achine is set up as follows: SEC=14, ESP=208, CAP=240. If this is not the case, your
ions will need to be modified accordingly.
• Turn the machine on and, with an empty portafilter and basket in place, press the
ESP/▲ key to start the pumping cycle with a cup beneath the grouphead to catch
the water. This ensures that the boiler is full of water for your steaming/frothin
adventure.
• LED will be flashing at the rate of 1/sec as the machine
The green ready indicator
is heating up towards the set espresso temperature.
•
Press the CAP/▼ key at any time while the temperature is rising. The green
LED will begin flashing at the rate of approximately 2/sec as the boiler is now
heating up to the t
emperature set for steaming. As a reference point, note that it
takes about 65 seconds for the Precisia boiler to heat from 208 F to 240 F.
•
Fill a chilled stainless steel steaming pitcher with fresh, cold milk in an amount
equal to 1/4 to 1/3 of the pitcher’s capacity (4 to 5 ounces).
• e milk level such that at least
Lower the wand into the steaming pitcher below th
half the length of the gray frothing enhancer is submerged. Tilting the pitcher is
perfectly acceptable to achieve the proper insertion depth. When the
temperature reaches 220 to 228 F, open the steam valve slowly by turning the
knob counterclockwise about 1-1/2 turns to release the steam into the chille
Initiating the steaming/frothing process at a temperature of 220 to 228 F
d milk.
ensures
that the heating element will remain “full on” during the steaming process.
•
Once the milk is sufficiently frothed (140-150 F), close the valve by turning the
knob clockwise.
• Press the CAP/▼ key to take the machine out of the steaming/frothing mode.
The green ready indicator LED will stop flashing.
•
Press the ESP/▲ key to start the pumping cycle which will refill the boiler and
quickly reduce the boiler temperature down towards the espresso brewing
setpoint.
• Press art the pumping cycle which will again
rapidly reduce th
setpoint (208 F).
the ESP/▲ key once again to st
e boiler temperature closer to the espresso brewing temperature
g
17
Steaming/Frothing Milk
What you will need:
Stainless steel pitcher Steaming/Frothing thermometer
Cold milk Wet cloth
Pitcher. The readily available sizes of reasonably priced stainless steel pitchers seem
to be limited to either 12 or 20 ounces. Eithe
recisia but a 12-ounce pitcher may be the easiest to use because the small amount of
P
mil
k typically required for one or two cappuccinos or lattes froths up nicely in the smaller
pitcher
delicio
desirab
with little waste. On the other hand, if you are frothing up milk for making some
us frothy hot chocolates, a 20-ounce stainless steel pitcher may be more
le.
r pitcher can be used successfully with
Milk v k at one time and certainly
no ed
exposu
setting
may be
re-a i
setting
olume. We recommend frothing 4 to 5 ounces of mil
more than 6 ounces. To prevent damage to sophisticated electronics from extend
re to high temperature, the microprocessor shuts the heater off once the CAP
temperature is reached. If more than 5 ounces of milk needs to be frothed, it
necessary to press the CAP/▼ key one more time during the frothing to
ct vate the heater but only when the temperature has dropped below the CAP
temperature (240 F).
Milk ty
tends t xture.
The m
produc
pe. Skim milk produces more foam than 1%, 2%, or whole milk but that foam
o be airy and dry. 1% or 2 % milk will produce foam having a better te
ilk should be cold and fresh and the pitcher should be chilled, as warm milk will
e foam of poor quality.
Tempe
frot
prefere the milk will continue to increase in temperature after the steam
is s
reache sonal preference. Milk will
sca
steami e
rature. A steaming/frothing thermometer is included with Precisia. The
hing should be finished once the milk reaches 140 - 150 F depending on your
nce. Note that
hut-off. Steaming/frothing with 1% milk and shutting off the steam when the milk
s a temperature of 140 - 145 degrees F is our per
ld at around 175 F with the taste and smell being quite obvious. The
ng/frothing thermometer should always be placed in the pitcher to monitor th
temperature of the milk, however once you become experienced, you can judge the
tem /or
perature almost as accurately by touching the milk container with your hands and
fingers
if a metal pitcher is used for steaming/frothing.
rothing. Frothing is using the steam to foam the milk. Another function of the
F
othing is to warm up the milk (steaming) to make it taste better with coffee. As steam
fr
simply pressurized water vapor with no air, it cannot foam the milk by itself. Foam is
is
18
formed by introducing air into the milk simultaneously with the steam and, with Precisia,
ere are two ways in which this can be accomplished.
th
1) Use the frothing aid device (FAD), which is the gray colored plastic part screwed
onto the tip of th
e steam wand. The FAD has two small air intake holes on the
top surface of the device. It is important to keep them clean and open after each
use. During the froth , e D tip should be immersed about halfway
milk and remain in that position. As steam is shoo
ing th FA into the
ting into the milk, a small
vacuum is formed inside the FAD which introduces air into the milk from the two
small holes on the top. As the foam grows, it will eventually partially seal the a
ir
intake holes. Once the holes are partially covered, the foam will stop forming as
very little additional air is being injected. Frothing continues past this point to
assist in breaking up large air bubbles which have formed and to heat the mixture
to the desired end temperature. Once the milk reaches the desired temp
frothin
g is complete. Close the steam valve gently, remove the pitcher from the
erature,
steam wand, and wipe the steaming wand/FAD with a wet cloth.
2) Use the bare steam wand without the FAD attached. Although a little difficult for
most beginning baristas, this method will produce a better foam (with a little
practice) and is the most common way in which professional baristas create the
micro-foam. First, you need to remove the FAD by unscrewing it from the
wand. During the frothing process, you need to locate the pitcher such that
steam wand tip is just im
mersed below the milk surface. You can tell that you are
ir
steam
the
at the right depth when you see air being injected into the milk with the steam
The tip of the wand should be about 1/8 - 3/16” beneath the surface. If the tip i
s
too high, large air bubbles will be created and/or the milk will spatter. As the
foam grows, the pitcher needs to be lowered to keep the wand tip just beneath th
surface. Once enough fo
am is produced, place the wand tip deep into the milk to
keep streaming the milk until the desired temperature is reached.
Notes
1. In order to reach the proper temperature as rapidly as possible to produce steam
for frothing milk, steaming temperature is not PID controlled. A 20-degree
temperature overshoot above the set temperature is considered nor
the machine reaches the CAP setting temperature, the heater automatically sh
mal. Once
uts
off. It will not come on again until the CAP is pressed a second time. We
recommend you start frothing as soon as the temperature reaches 220-228 F, i.e.,
before the CAP setting temperature is reached.
Once the frothing is started, the
temperature will stop rising and the heater will be on during frothing. The boiler
has sufficient capacity to froth about 6 ounces of chilled milk to the proper
e
19
temperature (140 – 150 F). If frothing is started after the temperature reaches
the CAP setting temperature and additional steaming is needed, you can activate
the heater when the temperature drops below the CAP set temperature. Once
heating is re-activated, you will notice the green LED flashing at the rate of 2/sec.
The heating can also be stopped at any time by pressing the CAP button again
which will be indicated by the green LED ready light being constantly lit (no LED
flashing) as long as the temperature is above the ESP setting temperature.
2.
As soon as the steaming/frothing operation is complete, the boiler should be
refilled for the next espresso shot or milk frothing by pressing the ESP key to
activate the pump. Let the pump run until water is coming out of the grouphead.
Note that you can stop the pump at any time by pressing the ESP button again or
just let it finish the pumping cycle automatically. Activation of the pump will also
lower the temperature of the boiler quicker, making it ready for the next espress
o
shot sooner.
3.
Milk pitcher size - Because of the limited size of the machine and the boiler
volume, frothing should be done in a small stainless steel pitcher
of 12 to 16 oz.
capacity. A 10 oz standard ceramic coffee mug also produces good frothing
results. The pitcher of milk should be kept cool before frothing.
4.
If you become skilled in frothing milk, the frothing enhancer device (the grey
colored plastic on the end of frothing wand) can be removed by unscrewing it from
the wand.
20
PID Temperature Control
Rough
those c
tempe
bitter a
dissolv
extract
e
com hort,
fewer c is
too hig
becom
of roas
this rel
fun experience to produce the best coffee flavor for yourself.
The g
water t
abbrev n
60 yea ntrolling
s
at t of
change
A simple to understand analogy of PID temperature control helps to explain how PID
control works and why it is such a good methodology. Imagine you are driving your car
down the street at 30 mph and ahead of you is an intersection controlled by a stop sign.
If you continue to travel at 30 mph until you reach the intersection, then slam on the
brakes, your car is going to travel through the intersection and go well past the stop sign
before coming to a rest. If, on the other hand, you gradually apply the brakes (but not
necessarily with a constant force) in advance of the stop sign, you can come to a
controlled stop right at the intersection. The first example is one of simple on/off control
and results in relatively poor temperature management. The second example is similar
to how your PID controlled Precisia works.
It should be understood that the speed of heating up and temperature stability are, more
often than not, very contradictory to one another. The faster a temperature is caused to
rise, the more likely it is that it will overshoot and, conversely, the slower the temperature
rise, the less chance it will overshoot. The PID parameters in the Precisia have been
ly 30% of a roasted coffee bean is made up of water-soluble compounds. 20% of
ompounds dissolve easily, while the remaining 10% take longer time and higher
rature to dissolve which is a good thing because that less soluble 10% is acidic,
nd generally unpleasant. The goal of all coffee making is to extract the easily
ed oils and compounds while leaving the rest in the grounds. The ideal
ing condition for espresso is to have the right water temperature and time to
xtract the maximum amount of the wanted compounds and keep the unwanted
pounds to a minimum. If the temperature is too low or the extracting time too s
ompounds will be extracted. The coffee will taste watery. If the temperature
h or the time too long, unwanted compounds will be extracted. The coffee will
e bitter and acidic. It should be noted that different beans and different degrees
ting might require different optimal extraction conditions. Once you understand
ationship, you can adjust the temperature and time to suit your taste. It can be a
microprocessor within Precisia uses a PID control algorithm to maintain brewin
emperature within a very close range around the set point. PID is an
iation for Proportional, Integral and Derivative. Although developed more tha
rs ago, PID control is still considered to be a popular method of co
ystems and remains the workhorse of industrial process control. PID algorithms look
he difference between the setting and measured temperature as well as the rate
of the difference to determine the power sent to the heater.
21
optimized to give the maximum heating speed possible with only a one-degree
fluctuation before complete stabilization. The time taken to reach a stable temperature
an vary due to different environments and operating conditions. In general, it will take
c
5-6 minutes to heat the machine from a room temperature of 73-76 F to 208 F. Colder
room temperatures or higher setting temperatures will take a bit longer. When making
the shot, it will take 1-3 minutes to recover the temperature drop. Making single shot
will take less time to recover than making a double shot. The longer the machine has
been on in the setting temperature range, the quicker it will recover.
Routine Cleaning and Maintenance
A little bit of cleaning after each use will go a long way towards minimizing the amount of
cleaning necessary to keep your Precisia in top shape. The amount and type of
cleaning operations necessary will depend upon how often you use your Precisia and
how you use it. Please remember that before cleaning the machine, always turn it off,
nplug it from the wall outlet, and allow it to cool.
u
KEEP THE BOILER FILLED WITH WATER (every time after use). The high
temperature and high humidity environment is very harsh to the boiler even though it i
made of stainless steel. Keeping the boiler filled with water after frothing and
storage will reduce the oxygen exposure of the metal and extends its life.
CLEANING THE EXTERIOR OF THE ESPRESSO MACHINE (dai
ly)
The exterior is best cleaned simply with a damp cloth or paper towel.
CLEANING THE FROTHING AID DEVICE AND STEAM WAND (weekly)
Normally the frothing aid device (FAD) and the exposed portion of the steam wand are
cleaned after each use. Even with this good practice, milk deposits will tend to
accumulate in all those hard to reach places.
• Remove the FAD by unscrewing in a counterclockwise direction and giving a slight
tug downwards when the machined thre
Soak the FAD in warm water for a short time and the deposits can easily be removed
•
ads are exposed.
simply using your fingers. Ensure that the two air intake holes on the top surface of
the FAD are clear – the bristles of a toothbrush can do a good job here.
• The now exposed portion of the steam wand is best cleaned with a warm water
soaked paper towel or a worn green nylon scrubby.
s
during
22
CLEANING THE FILTER BASKETS FOR ESPRESSO (monthly)
Normally, all of the filter baskets for both ground espresso and pods stay pretty clean
during normal use.
• Remove the filter basket from the portafilter.
• Clean the inside of the portafilter – do not wash in a dishwasher.
• Unscrew the outlet fitting on the bottom of the basket and set aside.
Push the screen assembly up and out of the basket.
•
Inspect the screen assembly for signs of espresso grounds and clean as necessary
•
using a soft toothbrush under running water.
• Stubborn deposits on the filter basket screen
s can be removed by soaking the
screens in an espresso machine cleaner such as Urnex Cafiza
• Reassemble the screen assembly into the basket, paying attenti
on to the nylon
locating pin on the screen assembly such that it fits into the small hole in the basket.
• Screw the outlet fitting back onto the screen assembly, securing it wit
hin the basket.
CLEANING THE GROUPHEAD AREA (monthly)
• Using a phillips-head screwdriver, remove the screw holding the dispersion screen to
the grouphead. Set the screw aside in a s
afe area.
• Clean the grouphead area with a damp cloth and a toothbrush.
• Clean the dispersion screen with a soft toothbrush under running water.
•
Stubborn deposits on the dispersion screen can be remove d by soaking the screen in
an espresso machine cleaner such as Urnex Cafiza.
SCALING (quarterly) DE
23
The frequency of descaling your espresso machine depends, to a large extent, on the
uality of the water used to brew the espresso. In hard water areas, minerals found in
q
the water will accumulate and over time affect operation of the espresso machine.
Approximately every 3
his cleaner also contains a blue-dye which assists in ensuring that the rinsing operation,
T
which follows the descaling operation, is thoroughly
months clean the machine internal parts with Urnex Cleancaf™.
performed.
http://www.urnex.com/cleancaf.htm
1. Dissolve contents of Cleancaf™ package in 4 cups of warm water. Carefully pour
this well dissolved mixture into Pr r reservoir. Put an empty filter
ecisia’s empty wate
basket and portafilter in place and a large container such as a Pyrex 2 cup measurer
beneath the spouts. As it will lik that you remove the grid cover and drip
ely be necessary
tray to fit the Pyrex 2-cupper beneath the portafilter, this would be a good time to put these
two
parts in the upper rack of your dishwasher.
2. Turn machine on, set the pump timing (SEC) to 40 seconds, and set the ESP
mperature down to 140 F. Initiate several brew cycles regardless of machine
te
temperature. For the third brew cycle, open the ste
e descaling solution to flow through the wand into a suitable contth
am wand valve all the way and allow
ainer. Discard the
solution once it has passed through your machine.
3. Rinse all components and repeat steps 1 and 2 twice with clean w
4. Rinse reservoir thoroughly with fresh water and refill. Run about 0.5 liters of fresh
ater only.
water through the machine, alternating between group head and steam wand or until the
a
ter has lost all traces of the blue dye. w
24
TroubleshootinTroubleshooting
Symptom Possible Causes Possible solution
Display is flashing “SSS” Water level in the
reservoir is low or the
reservoir is not fully
seated in the machine.
Display is flashing “_ _ _” Temperature is over 300 Turn the machine off and
F
T sensor Call authorized service
emperature
failed
Display is flashing “⎯ ⎯ ⎯” Turn off the machine. Let
Temperature is below 32
F
Call authorized service
Temperature sensor has
failed.
Coffee is leaking out of the
side wall of portafilter
Coffee powder is on the
rim of portafilter
Water is not pumping out The boiler is empty after
frothing
The silicone tube is not in
the reservoir.
Changed pumping time but
amount of espresso
produced remains same
Brew temperature for
espresso was changed but
Set key was not pressed
after changing the
parameter.
SET key was not pressed
after change the
the taste is the same temperature.
Brew temperature jumps too Water scale has built up Descale the boiler – see
much on the internal boiler
surfaces. section.
Espresso tastes too weak or
too strong
Pump timing (SEC) not
changed
when switching
from one shot to two shot
or vice-versa
Fill the reservoir with water
and/or f
ully seat the
reservoir.
allow it to cool down.
center – machine may
need to be returned for
service.
it warm up.
center – machine may
need to be returned for
service.
Remove portafilter and
clean the rim.
Run the pump for one
cycle or until water flows
from the grouphead.
Insert the silicone tubing in
the reservoir.
Reset the pumping time
(SEC) and press the SET
button
Reset the brew
temperature (ESP) and
press the SET button.
Routine Maintenance
Single-shot timing is 13-15
seconds. Double shot
timing is 19-21 seconds.
25
25
Warranty
Auber Instruments warrants this product to be free from defects in material and
workmanship for a period of one ate of t e when
utiliz use llowing
ed for normal household , subject to the fo
exceptions.
If your appliance fails to operate der normal household
cond pe s to
itions within the warranty riod, return the complete appliance and accessorie
Auber Instruments, 730 Culworth Manor, Alpharetta, GA 30 e is
found by Auber Instruments to be l or w
Instruments will repair or replace it free of charge. A dated proof of purchase may be
required.
The ents o ent
liability of Auber Instrum is limited solely to the c st of the repair or replacem
of the unit at our option. This warranty does not cover normal wear of parts and does
not a ply to any unit that has bee d es.
p n tampered with or use
This limited warranty does not co age caused by m t
handling or damage due to faulty packaging or mishandlin anty
does not cover damage or defects caused by or resulting from damages from shipping or
repa t pa
irs, service or alterations to
perfo on or fa ized by Auber Instruments.
rmed by a repairpers
This warranty is available to the original purchaser of the u r legal
and/or conventional warranties. The responsibility of Aub , is limited
to the specific obligations expres anty.
In no event is Auber Instruments ental or consequential damages of any
natu te it on of
re whatsoever. Some sta
incid ial dama the abo .
ental or consequent
This pecific a rights which
warranty gives you s
vary inc
from state to state or prov
*Imp o in roof of
ortant: Carefully pack item t avoid damage in shipp
purchase date and to attach tag t g wit te
address and phone number with a note giving purchase in , model number and
what w en (as
you believe is the problem
dam ping is not covere a ckage
age in ship
“ATTENTION CUSTOMER SERV l
products and therefore the specif ined herein are subject to change without
notice.
(1) year from the d he original purchas
conditions, exclusions and
properly while in use un
022. If the applianc
defective in materia orkmanship, Auber
for commercial purpos
ver dam
isuse, abuse, negligen
g in transit. This warr
he product or any of its
rts which have been
cility not author
nit and excludes all othe
er Instruments if any
sly assumed by it under th
e terms of the limited warr
liable for incid
s/provinces do not perm
ges and therefore
legal rights and you may
the exclusion or limitati
ve may not apply to you
lso have other
e to province.
g. Be sure to include p
o item before packin
h your name, comple
formation
ith item. We recomm
d by your warranty). M
ICE”. We are constant
d you insure the package
rk the outside of your pa
y striving to improve our
ications conta
26
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