Grainfather G Series User manual

GSERIES
G702 INSTRUCTION MANUAL
CHEERS, NICE
TO MEET YOU

LET’S
BREW BIG
TOGETHER
GSERIES
02

03
Get started by following these instructions on how to assemble and use your
G70
2
. We recommend reading the following safety information before use.
Please also nd enclosed, advice for cleaning and storing your G70
2
.
WARNING! NORTH AMERICA 220V ONLY
THANK YOU FOR CHOOSING
THE GRAINFATHER G702
Please check your unit rating label for the voltage. If your unit is a North America 220V product, the power cord,
control box and boiler body included in the box are designed to be used together with a 220V supply. Using any
of these components with another product may result in hazards and equipment damage.
3-pin workshop and
power tools supply.
3-pin workshop and
power tools supply.
3-pin laundry dryer
supply, most common
installation prior to
1996.
4-pin modern laundry
dryer supply, commonly
installed aer 1996.
4-pin electric oven
supply.
Brewing system is compatible using power
cord supplied in-box.
Brewing system is compatible by using an
adapter that includes a ground connection
and has appropriate electrical certication.
This power supply socket is NOT SUITABLE
for use with the brewing system. This socket
provides hot-hot-neutral connections. The
brewing system requires a ground connection to
perform safely in the event of an electrical fault.
Brewing system is compatible by using an
adapter that includes a ground connection
and has appropriate electrical certication.
Brewing system is compatible by using an
adapter that includes a ground connection
and has appropriate electrical certication.
SOCKET GUIDE (NORTH AMERICA 220V ONLY)
POWER SUPPLY SOCKET
NEMA 620R
NEMA L620R
NEMA 1030R
NEMA 1430R
NEMA 1450R
NOT SUITABLE
NEMA L1430R
NEMA 1460R
COMPATIBILITYDESCRIPTION

04
1. Read all instructions before using the
Grainfather G702.
2. If the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent, or a qualied person to avoid a hazard.
3. This appliance is intended to be used in
household and similar applications such as
stakitchen areas in shops, oces, and other
working environments; farmhouses and by
clients in hotels, motels and other residential
type environments; bed and breakfast type
environments; catering and similar non-
retailed applications.
4. The appliance is for indoor use only.
5. The appliance is not suitable for installation in
an area where a water jet could be used.
6. The appliance must not be cleaned by a
water jet.
7. The appliance must be in an upright position
at all times when in use.
8. The appliance is only to be installed in
locations where it can be overseen by trained
personnel.
9. The installation of a residual current device
(RCD) having a rated residual operating
current not exceeding 30mA is advisable.
10. The A-weighted sound pressure level of the
appliance is below 70dB.
11. Always unplug the unit before cleaning, during
storage or in the event of a fault.
12. The boiler, lid and pipes may reach
temperatures of up to 100°C (212°F) and
therefore must be handled with caution. Never
move the unit while it is in operation.
13. Handles on the side of the unit are only meant
for transportation once the unit is empty and
in a cooled, non-use state.
14. Please note that a two-person or mechanical
liis required when using this system. A
single person limay lead to serious injury.
15. Access of the service area is restricted to
persons having knowledge and practical
experience of the appliance. The maximum and
minimum ambient temperatures for normal use
of the appliance is: 40°C (104°F) to
-20°C (-4°F).
16. To protect against re, electric shock, and injury,
do not immerse cord/plugs in water or other liquid.
THE FOLLOWING STATEMENT APPLIES TO
GRAINFATHER PRODUCTS SOLD IN EUROPE:
•This appliance can be used by children aged from
8 years and above and persons with reduced
physical, sensory or mental capabilities or lack
of experience and knowledge if they have been
given supervision or instruction concerning use of
the appliance in a safe way and understand the
hazards involved.
•Children shall not play with the appliance.
Cleaning and user maintenance shall not be made
by children without supervision.
THE FOLLOWING STATEMENT APPLIES TO
GRAINFATHER PRODUCTS SOLD IN THE
UNITED KINGDOM:
•This appliance can be used by children aged from
8 years and above and persons with reduced
physical, sensory or mental capabilities or lack
of experience and knowledge if they have been
given supervision or instruction concerning use of
the appliance in a safe way and understand the
hazards involved. Children shall not play with the
appliance. Cleaning and user maintenance shall
not be made by children without supervision.
•Means for disconnection must be incorporated in
the xed wiring in accordance with the wiring rules.
•The xed wiring insulation must be protected,
for example, by insulating sleeving having an
appropriate temperature rating.
THE FOLLOWING STATEMENT APPLIES TO
GRAINFATHER PRODUCTS SOLD IN AUSTRALIA
AND NEW ZEALAND:
•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.
NOTE: Further to the safeguards listed above, we do
not recommend the use of this product by children.
Not following the safety information above could
result in serious injuries and may void your warranty.
SAFETY INFORMATION

05
ANATOMY
DIAGRAM
& PARTS LIST
3. Support ring retainer
2. Support ring
4. Hop lter
6. Body
8. Pump
9. Power box
10. Base
7. M16 socket
1. Glass lid
5. Controller, cable
and M16 DC
connector
12. Liing bar
15. Grain basket
17. Ball valve tap
16. Counterow
chiller
13. Recirculation
barb and hose
11. Recirculation
pipe, sight
glass, ball
valve and
ings
14. Grain plate
18. Tap adapter set
NOTE: The full spare parts list for the G70
2
is available online: help.grainfather.com

PRE-BREWING
ASSEMBLY
Before use, we recommend
cleaning your G702and all of its
components using the Grainfather
High Performance Cleaner.
For detailed cleaning instructions,
see page 14.
06
1. INSTALLING THE FILTER
Take the hop lter (4) and place it into the base inside
the G70
2
body (6). It should be a tight t and you’ll need
to apply some pressure to make sure that it is securely
in place.
3. CONNECTING TO POWER
Take the main power cable and plug it into the base at the
back of the G702. Next, plug the other end of the cable into
the professionally installed 15A (13A in UK) power socket.
Turn on the master switch at the base of the G702body.
The controller should now receive power and the display
will turn on. If this does not occur, please check that both
the M16 controller cable and the main power cable are
securely connected.
4
6
5
7
2. ATTACHING THE CONTROLLER
Remove the G702controller (5) and the power cord
from its packaging and place the controller securely
on the bracket on the front of the unit. Next, remove
the small cap from the M16 socket (7) on the front
of the G702. Plug the M16 cable (5) into the socket,
making sure that the right-angle connector is facing
upwards. Finally, tighten the securing nut.

07
THE G702
CONTROLLER
The G702smart controller has built-in
wireless connectivity, allowing you to
use your mobile device as a remote
control. Connect to the free Grainfather
App for step-by-step brewing and
access bazillions of recipes.
SETTINGS
This screen displays the main seings:
• Power control mode: This mode allows for manual
control of the power from the element in 5%
increments. This can be used to control the power
when distilling. Simply press ‘power control’ and
use the up and down buon to control the power.
NOTE: This can also be controlled through the
Grainfather App. Choose between manual or power
mode on the main app screen and use the up and
down buons on the app.
• Change units: Choose between Celsius or Fahrenheit.
• Calibrate temperature: The G702has two probes
that are NTC (negative temperature coecient) type
temperature sensors. An NTC thermistor uses electrical
resistance properties of ceramic or metal composites
to measure temperature. These sensors are accurate
to 0.050°C (0.025 °F). This feature allows for an
oset to be applied to the reading of the temperature
probe if it is inaccurate. This should only be used if the
temperature probe is compared to a certied calibrated
thermometer which has a resolution of +/-0.010°C
(0.005°F).
• Boil temperature: Here you can adjust your boiling
temperature based on the elevation of your brewing
location. To use this function you can nd the altitude
of your location online, and also the boiling point of
water at that altitude. Change the boil temperature
from 100°C (212°F) to your new boil temperature.
• Buzzer seings: Within this section you can select
silent mode for your controller. When enabled, you’ll
no longer hear beeping to alert you when you’ve
reached the next step during your brew.
ABOUT
This is where you can nd details about your device.
When connected to the internet, you can also check
and install new updates to the G702controller from here.
CONNECTION SETUP
When you rst turn on the controller, you will be greeted with the
connection setup screen. Press ‘set’ to go to the default screen.
DEFAULT SCREEN
The default screen shows the current temperature and target
temperatures, unit symbol (Celsius or Fahrenheit),
timer (when
active), wireless connection and status symbol.
MAIN MENU
This screen displays the main menu options:
•Network conguration •Seings •About
Activate the pump
Set a manual timer
Activate heating.
Hold down for
10 seconds to
enable delayed
heating.
Up/down
arrows to
change
your target
temperature
NETWORK CONFIGURATION
On this screen, you can add a new wireless network and
connect your G702controller. To add a network, select ‘add
new network‘, then follow the instructions on the next page.
If you’ve previously connected your G702to other networks,
you can also clear these here.

08
For the ultimate brewing
experience, connect your
controller to the Grainfather App.
1. Make sure that your wireless network reaches
the location where you will be using your G70
2
.
While a wireless connection can be made over
long distances, we recommend placing your
unit within 10m (30) of the wireless router.
If you wish to use your G70
2
further away, we
recommend using a wireless range extender to
avoid connection issues.
2. Download the Grainfather App on your mobile
device from the App Store or Google Play Store
and register an account if you’re a new user.
4. Once in the app, navigate to the equipment screen.
The equipment screen shows all the brewing and fermenting
equipment that you have set up on your account.
NOTE: The following screen layouts depict an iOS device and
may dier slightly for Android.
3. When you rst switch on the controller, you will be greeted with
the connection setup screen. If you do not see the screen below,
then press the ‘set’ buon on the controller and go to ‘network
cong’ then ‘add new network’. Once on the connection setup
screen, open the Grainfather App on your mobile device.
SCAN AND
EXPLORE THE FREE
GRAINFATHER APP
5. To add a new device, tap on the ‘+’ icon on the boom right
of the screen and select ‘brewing equipment’.
6. Select ‘Grainfather’ on the list of brands and subsequently
select ‘Grainfather G702’ on the list of equipment.
WIRELESS
CONTROL & APP
INTEGRATION

09
8. FOR ANDROID USERS
If seing up the G702via an Android device,
choose your controller in the list (see step
10 next).
9. FOR iOS USERS
If seing up using an iOS mobile device,
follow the instructions on the screen to
connect your mobile device to the G702.
Once the connection is established you
will receive a notication on your mobile
device. Tap the notication to return to the
Grainfather App. You will automatically
return to the device setup screen.
7. On the device setup screen tap ‘ready’.
Your mobile device may now request certain
permission(s) required to connect with the
G702and may vary for dierent devices.
Accept all requests.
10. Once your phone has successfully connected to the G70
2
(Android and iOS), select your wireless network from the list
and enter in your network password, and then tap ‘connect’.
Once completed, add a name for your device and press ‘done’.
11. Set up is now complete and you will return to the
equipment screen. Select your Grainfather G702to enter
the controller interface.
12. On the G702controller, you will be prompted to grant
permission for remote control. Press the ‘set’ buon and select
‘yes’. The G702is now ready for you to start controlling your
brew session via your mobile device.
NOTE: This permission request for remote control is in
accordance with IEC/EN 603351 and will appear each time
you connect to the G702via a mobile device.
Within the Grainfather App you can now select recipes or even
create your own. You can also use the step-by-step brewing
system to brew condently.

10
15
1514
BREWING ON
THE
G702
1. ADD THE MASH WATER
Place your G702on a at, stable surface before you
start brewing. We recommend positioning your G702on
the oor due to heavy liing that is required later in the
brewing process. Add the volume of mash water required
by your recipe – you can use the advanced calculators
available on the Grainfather App.
NOTE: Ensure that the recirculation ball valve is open and
the lower ball valve is closed during this step to avoid a
pump airlock.
2. SET THE MASH/STRIKE TEMPERATURE
Using the G702controller or your mobile device, set the
required mash temperature and press the ‘heat’ buon
to begin heating. Place the lid on the G702to reduce the
heating time. At this stage, if your G702is connected to the
Grainfather App, you can run your brew session remotely
from your mobile device.
3. ASSEMBLE THE GRAIN BASKET
Place the grain plate (14) inside the grain basket (15)
and ensure that the plate is siing rmly on the boom
of the basket.
5. ADD GRAINS AND STIR
Once your water reaches the set temperature, slowly
add the grain to the grain basket, stirring well to avoid
any dry clumps.
You are now set up and ready to start
brewing! Follow these instructions to
guide you through your brew on the G702.
4. INSTALL THE GRAIN BASKET
Slowly insert the assembled grain basket into the G702.
Ensure that the top of the grain basket rests at on the
support ring (2).

11
NOTE: The G702does not require a top plate or an
overow pipe in the basket. The grain basket now has
extra drainage holes, removing the need for these parts.
You can choose to use a top plate when brewing higher
ABV beers if you will be maximising the amount of grain
used in the G702. In this case, the top plate can help to
keep grain in the basket if the wort levels are too high
and stops any wort from draining through the liing bar
holes on the side of the basket. An additional grain plate
can be purchased on the online Grainfather Store or at
your local retailer.
The maximum grain weight that the G702basket can
hold is 17kg (37lb). However, this is aected by grain
crush, type and variety, and it may be easier to manage
this by using an additional grain plate on top of the
mash. If you’re unsure how well your particular grain bill
will t then we recommend mashing up to 16kg (35lb).
7. RECIRCULATE YOUR MASH (WORT)
Ensure that the ball valve (11) on the top of the
recirculation pipe (11) is open. Then, to begin
recirculating, press the ‘pump’ buon on the controller
or via the Grainfather App. If recirculation doesn’t start,
press the ‘pump’ buon to turn it o, blow into the
hose to clear the airlock, then restart the pump.
TIP: To save time, we recommend preparing your
sparge water during your mash.
9. SPARGING AND BASKET REMOVAL
Allow the mash liquid to drain into the boiler. Then,
gently pour the sparge water evenly over the grain
until the water is a few millimetres above the grain
and allow to drain.
TIP: To save time, you can now start to increase the
temperature in preparation for the boil.
6. INSTALL THE RECIRCULATION HOSE
Ensure that the hose is securely aached to the
recirculation barb (13) and insert the barb into the
recirculation opening on the side of the G702body.
Rest the other end of the hose on the top of the grain.
8. LIFTING THE GRAIN BASKET
When the mash has nished, turn othe pump and
remove the recirculation hose. Close the ball valve on
the recirculation pipe and insert the liing bar (12) into
the holes inside the grain basket. Lithe grain basket
and then turn it 45° so that the feet at the boom rest
on the basket support ring (2).
13
12
11
CAUTION
A TWO PERSON or mechanical li
is required when using this system
as the basket can weigh up to 60kg
(132lb) during use. Please do not
aempt to liby yourself as this could
lead to serious injury.

12
10. BOIL YOUR WORT
Aer removing the grain basket, complete the boil and
add the hop additions required by your recipe.
Once the sparge has nished, ret the liing bar to
the grain basket to liand remove the basket from
the boiler.
NOTE: If you are using a large grain bill, we recommend
scooping some of the grain from the basket to reduce
the weight before liing.
CAUTION
Ensure that the unit does not reach the
boil while the grain basket is still in place.
During the boil, do not t the glass lid as
it may cause a boil over.
2
CAUTION
BE VERY CAREFUL not to twist the
basket while it’s in the sparge position
as it could knock it othe support ring.
If the sparge is stuck and not draining,
then remove the top grain plate
(if applicable), lower the basket and
slice the grain bed with a stainless
steel paddle or similar. Cut through the
stuck grain from the centre towards
the outside repeatedly until it loosens.
Then, return the basket to the sparge
position and replace the top grain plate
(if applicable) to continue sparging.
Always ensure that the support ring ts
tightly into its groove and is held in place
by the support ring retainer (3). If you
remove the support ring for cleaning,
ensure that it is correctly reinstalled
along with the support ring retainer.

13
2. Place the counterow chiller on a table or bench and push
t the hose barb on the end of the hot wort in hose (A) into
the recirculation opening on the inside of the G70
2
body.
NOTE: Ensure that none of your wort or water tubes are
siing underneath the counterow chiller. The water tubes
should be coming out from the top. If a tube is squashed or
there is a kink, this will cause a pressure build up and liquid
will not be able to pass through.
3. The coloured hoses are where the cold water enters (blue)
and hot water exits (red). To allow cold water to enter, aach
the blue hose to your tap using your tap adapter set (18).
The red hose is where the hot water drains out as it ows
through the counterow chiller. The cold wort out hose (B) is
where your wort exits the counterow chiller. Ensure the red
hose is directed somewhere to collect or drain safely.
TIP: Collect some of the hot water from the red hose to use
as cleaning water aer your wort has nished transferring.
4. To sanitise the counterow chiller place connection B
into the
G702 body. Turn the pump on to recirculate hot
wort back into the
G702 to sanitise the inside of the coil.
Complete this step without cold water circulating and
recirculate for approximately 3060 seconds, but no longer
then turn the pump o.
NOTE: The
G702 is designed to cool while simultaneously
transferring your wort to your fermenter. You should not
cool by recirculating into your
G702 as this reduces the
thermal eciency.
5. Ensure no hoses are kinked and that the water can
ow freely then gradually turn on your cooling water and
adjust the ow rate. Allow the cooling water to ow for
two minutes then turn on the pump. Once the cold wort
out hose (B) runs cool runs cool, switch the pump oand
place the end of the hose inside your clean and sanitised
fermenter and switch the pump back on. Always try to keep
the fermenter opening covered to avoid contamination while
transferring your wort.
NOTE: Take an OG (original gravity) reading of your cooled
wort before adding yeast as per the correct yeast pitching
temperature within your recipe. Fit a bung and airlock to
the top of your fermenter to keep it safe from contaminants
that may spoil your brew.
1. At the end of the boil turn the heating element o.
Create a whirlpool by stirring the wort vigorously with
your paddle. Be careful not to dislodge the hop lter.
NOTE: A moderate whirlpool may automatically form
due to the force of the pump.
CLEANING
Before your rst use, run cleaner through the counterow
chiller. For detailed instructions on how to clean your
counterow chiller, please refer to the CIP (Cleaning in Place)
section on page 14. Also, ensure that your fermenter is clean
and sanitised before cooling and transferring your wort.
FLOW RATES
The maximum ow rate of water through the counterow
chiller is 6 L (1.6 US Gal) per minute. Do not exceed this ow
rate as it may cause damage to the product.
The maximum ow rate of wort through the counterow
chiller is 4 L (1.1 US Gal)/min. At this ow rate, with a tap
water temperature of 20°C (68°F), the wort in the fermenter
should be at approximately 25°C (77°F). You can get the wort
in your fermenter close to 3°C (5.4°F) above your tap water
temperature by reducing the ow of the wort through the
counterow chiller by adjusting the 1/2” ball valve (11).
COOLING WITH
THE COUNTERFLOW
CHILLER
The G70
2
includes a counterow
chiller (16). This has been designed to
eciently cool your wort, and allow
easy and sanitary transfer directly
into a fermenter.
Hot water out
Cold water in
Hot wort in (A)
Cold wort out (B)
16
WARNING
The counterow chiller is not intended for
continuous hot wort circulation without cooling
water owing through. Do not use during
processes like whirlpooling and hop stands.

14
ADVICE FOR
CLEANING
& STORAGE
No one really enjoys cleaning,
but it’s worth it for great beer!
• Aer use, the G702and all of its components
should be cleaned immediately and dried
thoroughly. We recommend using the Grainfather
High Performance Cleaner as it removes the need
for tedious scrubbing. However, all stainless steel
components can be cleaned using a conventional,
unscented brewing detergent/cleaner.
• Abrasive agents and sponges/brushes could cause
scratching and are not suitable for use. Ideally, use
a dish brush or sosponge to clean the unit.
• Do not store in a damp area as this could cause
damage to the product.
• Once you have cleaned your equipment, dry,
reassemble and store.
CLEANING IN PLACE CIP
1. Remove all trub and solids from the G702by
removing the hop lter from the G70
2
, rinse thoroughly
and then put aside. Open the lower ball valve tap and
ush the rest of the trub and other remains from the
G702. You can now close the lower ball valve tap.
2. Fill the unit with 15L (3.9 US Gal) of water and 1 cap
of Grainfather High Performance Cleaner.
3. Heat the water to 60°C (140°F) and use a dish
brush or sosponge to clean the unit.
4. Aach the counterow chiller and place
the connection B hose from the counterow chiller into
a 5L (1.3 US Gal) jug. Once ready, switch the pump on
and let the water run into the jug until the water
clears. Now, place the hose into the unit so the water
continues to recirculate and leave for 1015 minutes.
CAUTION: RISK OF BURNS
Use heat resistant brewing gloves or other
suitable gloves during this process.
PUMP CLEANING
We recommend cleaning your pump every 510
brew sessions. This process should be done aer
you’ve cleaned your G702.
1. Turn the unit upside down and remove the four
screws on the base of your G702.
2. Using pliers, squeeze and shithe hose clamps
away from the pump inlet and outlet.
3. Remove the four screws that hold the pump in place
and detach the inlet, and outlet hoses from the pump.
4. Remove the screws holding the impeller housing
to the pump.
5. Remove the top cover of the impeller housing
exposing the impeller.
NOTE: There is no need to expose the magnetic
drive pump.
6. Use a pipe brush or something similar to clean
the impeller and impeller housing.
NOTE: Do not submerge the pump in water.
7. Dry the components and reassemble the unit.
5. Once complete, switch the heating and pump o,
and open the lower ball valve to allow the unit to drain.
6. Once draining has nished, follow steps 25 again
but this time with clean water to rinse and ush the
G702and counterow chiller.

15
BREWING
NOTES

GET IN TOUCH ONLINE: help.grainfather.com/hc/en-us/requests/new
RESOURCES: Check out our YouTube Channel for helpful videos. For
more information, visit our Help Centre: help.grainfather.com
D3
READ AND FOLLOW ALL INSTRUCTIONS
CAUTION 
Risk of res and electric shock.
 Replace only with genuine Grainfather cord set, part No. SJTO.
 Do not immerse in water.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE
FOR COMMERCIAL AND INDOOR USE ONLY
WA R N I N G
AV E R T I S S E M E N T
RISK OF ELECTRIC SHOCK . DO NOT OPEN.
RISQUE DE CHOC ÉLECTRIQUE. NE PAS OUVRIR
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