Grainfather G Series User manual

GSERIES
CHEERS, NICE
TO MEET YOU
G40 INSTRUCTION MANUAL

LET ME
CHANGE THE
WAY YOU BREW
GSERIES
02

Get started by following these instructions on how to assemble and use your
G40. We recommend reading the following safety information before use.
Please also nd enclosed, advice for cleaning and storing your G40.
WARNING NORTH AMERICA 220V ONLY
THANK YOU FOR CHOOSING
THE GRAINFATHER G40
Please check your unit rating label for the voltage. If your unit is a North American 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
03

SAFETY INFORMATION
NOTE: Not following the safety information below could result in serious injuries and may void your warranty.
1. Read all instructions before using the Grainfather G40.
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
30 mA is advisable.
10. The A-weighted sound pressure level of the appliance should be below 70 db.
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 recommended when using larger grain bills on 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: -20°C (-4°F) to 40°C (104°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.
04

05
ANATOMY
DIAGRAM
& PARTS LIST
1. Tempered
glass lid
2. Support ring
12. Liing bar
15. Grain basket
16. Counterow
wort chiller
17. Hex nut
13. Recirculation
barb and hose
10. Base
NOTE: The full spare parts list for the G40 is available online: help.grainfather.com
3. Support ring
retainer
11. Recirculation
pipe, sight
glass, ball
valve and
ings
4. Hop lter
8. Pump
5. Controller, cable
and M16 DC
connector
6. Body
7. M16 socket
9. Power box
14. Grain plate
18. Tap adapter set

PRE-BREWING
ASSEMBLY
Before use, we recommend cleaning
your G40 and all of its components
using the Grainfather High
Performance Cleaner. For detailed
cleaning instructions, see page 14.
06
NOTE (NZ/AU ONLY): The G40 has a default 10 amp
mode, but it can also be used in 15 amp mode if you
wish to add more power to your system. For instructions
on how to enable 15 amp mode, please go to page 15.
4
5
7
1. INSTALLING THE FILTER
Take the hop lter (4) and place it into the base inside
the G40 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.
2. ATTACHING THE CONTROLLER
Remove the G40 controller (5) and the power cable
from the 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). Plug the
controller cable and M16 DC connector into the M16
socket and tighten the securing nut.
3. CONNECTING TO POWER
Take the main power cable and plug it into the base
at the back of the G40. Next, plug the other end of the
cable into a suitable power socket (15 amp in US/CA,
16 amp in EU, 13 amp in UK, or 10 amp in AU/NZ).
The display screen on the controller should now
turn on, however if this does not happen, please
check that both the controller cable and the M16 DC
connector are securely aached, and check the main
power cable.

THE G40
CONTROLLER
The G40 smart 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.
MAIN MENU
This screen displays the main menu options:
•Network conguration
•Seings
•About
NETWORK CONFIGURATION
On this screen, you can add a new wireless network
and connect your G40 controller. To add a network,
select ‘add new network‘, then follow the instructions
on the next page. If you’ve previously connected your
G40 to other networks, you can also clear these here.
SETTINGS
This screen displays the main seings:
• Change units: choose between Celsius or Fahrenheit.
• Calibrate temperature: the G40 has 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.
• NZ/AU only: this is where you can change your unit
from 10 amp to 15 amp mode if you choose to add
more power. See page 15 for further details.
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 G40 controller
from here.
07
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 status symbol
and power mode (for those in AU/NZ).
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

08
For the ultimate brewing
experience, connect your
controller to the Grainfather App.
WIRELESS
CONTROL & APP
INTEGRATION
1. Make sure that your wireless network reaches
the location where you will be using your G40.
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 G40 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 G40’ on the list of equipment.

09
WIRELESS
CONTROL & APP
INTEGRATION
8. FOR ANDROID USERS
If seing up the G40 via 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 G40. 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
G40 and may vary for dierent devices.
Accept all requests.
10. Once your phone has successfully connected to the G40
(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 G40 to enter the controller
interface.
12. On the G40 controller, you will be prompted to grant
permission for remote control. Press the ‘set’ buon and select
‘yes’. The G40 is 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 G40 via 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
BREWING ON
THE G40
1. ADD THE MASH WATER
Place your G40 on a at, stable surface before you
start brewing. We recommend positioning your G40
on 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
during this step to avoid a pump airlock.
2. SET THE MASH/STRIKE TEMPERATURE
Using the G40 controller or your mobile device, set
the required mash temperature and press the ‘heat’
buon to begin heating. Place the lid on the G40 to
reduce the heating time. At this stage, if your G40 is
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 G40.
4. INSTALL THE GRAIN BASKET
Slowly insert the assembled grain basket into the G40.
Ensure that the top of the grain basket rests at on the
support ring (2).
14
15
2

11
NOTE: The G40 does 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 G40. 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 G40 basket
can hold is 13kg. 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 12kg.
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.
CAUTION
A two person or mechanical li is
recommended when using larger grain bills
on this system. A single person li may lead
to serious injury.
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 G40 body.
Rest the other end of the hose on the top of the grain.
13
12
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).

12
10. BOIL YOUR WORT
Aer removing the grain basket, complete the boil and
add the hop additions required by your recipe.
CAUTION
CAUTION
During the boil, do not t the glass lid as you may
cause a boil over.
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.
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.

13
1. At the end of the boil turn the heating element o. Create
a whirlpool by stirring the wort vigorously with your paddle.
NOTE: A moderate whirlpool may automatically form
due to the force of the pump.
2. Place the counterow wort chiller on a table or bench
and push t the hose barb on the end of connection A into
the recirculation opening on the inside of the G40 body.
NOTE: Ensure that none of your wort or water tubes are
siing underneath the counterow wort 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
and hot water exits. 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 wort chiller. Connection D is
where your wort exits the counterow wort chiller.
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 wort chiller place connection D
into the G40 body. Turn the pump on to recirculate the wort
back into the G40 to sanitise the inside of the coil. Complete
this step without the cold water circulating. Recirculate for
approximately 1−2 minutes.
NOTE: The G40 is designed to cool while simultaneously
transferring your wort to your fermenter. You should not
cool by recirculating into your G40 as this reduces the
thermal eciency.
5. Turn the cooling water on. Once connection D runs cool,
switch the pump o and place the end of the hose inside
your clean and sanitised fermenter. 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.
CLEANING
Before your rst use, run cleaner through the counterow
wort chiller. For detailed instructions on how to clean
your counterow wort 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
wort chiller is 6L (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
wort chiller is 4L (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 (37°F) above
your tap water temperature but reducing the ow of the
wort through the counterow wort chiller and adjusting
the 1/2” ball valve (11).
COOLING WITH
THE COUNTERFLOW
WORT CHILLER
The G40 includes a counterow wort
chiller (16). This has been designed to
eciently cool your wort, and allow
easy, and sanitary transfer directly into
a fermenter.
16
Connection A
Connection D

ADVICE FOR
CLEANING
& STORAGE
No one really enjoys cleaning,
but it’s worth it for great beer!
• Aer use, the G40 and 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 G40 by removing
the hop lter from the G40, rinse thoroughly and then
put aside. Remove the hex nut (17) from the T-section of
the recirculation pipework and ush the rest of the trub
and other remains from the G40. You can now re-aach
the hex nut.
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 wort chiller and place the
connection D hose from the 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.
NOTE: You can choose to add an additional ball valve tap to
make the cleaning process even easier. Please see the next
page for more information.
PUMP CLEANING
We recommend cleaning your pump every 5−10 brew
sessions. This process should be done aer you’ve cleaned
your G40.
1. Turn the unit upside down and remove the four screws on
the base of your G40.
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 remove the hex nut 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
G40 and counterow wort chiller.
14

ADDING A BALL VALVE TAP TO YOUR UNIT
A ball valve tap can be added to the G40 to allow
quick drainage from the boom of the unit. The tap
accessory can be purchased on the online Grainfather
Store or at your local retailer.
CAUTION
To upgrade your G40 to 15 amp mode, a 15 amp
power socket must be professionally installed.
Do not plug a 10 amp cable into a 15 amp socket
as this is a serious re hazard. Also, running
15 amp mode with a 10 amp cable and socket
will trip ELCB.
HOW TO INSTALL THE BALL VALVE TAP
1. Remove the hex nut from the T-section of the
recirculation pipework.
2. Transfer the o-ring from the hex nut to the tap.
3. Install the ball valve tap onto the T-section.
HOW TO UPGRADE YOUR UNIT TO 15 AMP MODE
1. Purchase the NZ/AU 15 amp power cable accessory
from the online Grainfather Store or at your local retailer.
2. Plug the 15 amp power cable into the base at the
back of your G40.
3. To change into 15 amp mode, use your G40 controller,
go into ‘seings’ from the main menu and hold the ‘heat’
buon for 10 seconds.
4. A pop-up warning will show. Click ‘set’ to proceed
and your unit is now in 15 amp mode.
5. To return to 10 amp mode, simply hold the ‘heat’
buon for 10 seconds and a pop-up warning will show.
Click ‘set’ to return to 10 amp mode.
UPGRADE
YOUR G40
Get the most out of your G40
Brewing System with these
optional upgrades.
NZ/AU ONLY: UPGRADE FROM 10 AMP TO 15 AMP
15

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
Version: 1
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
WARNING
AVERTISSEMENT
RISK OF ELECTRIC SHOCK . DO NOT OPEN.
RISQUE DE CHOC ÉLECTRIQUE. NE PAS OUVRIR
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