Icemaster G20.1 Instruction Manual
Page 5of 8www.KegLand.com.au Last Updated 5/08/2020 3:33 PM
You can measure the glycol percentage using a calibrated refractometer and comparing to the
specific gravity at 21°C in the above table.
We would advise running a 20% glycol solution however, if you do not have a jacketed fermenter or
have the fermenter in a very warm environment you can run it at a higher glycol concentration. The
pumps are not designed to be run with a glycol concentration higher than 30% hence it is not
advised to exceed this glycol concentration. Doing so may damage the pumps.
Setup for each fermenter
1. Prior to connecting the G20 to the fermenter ensure that the temperature of the liquid in
the fermenter is below 50°C. The G20 is not designed to cool from boiling to 50°C and
instead normal tap water should be recirculated through the cooling coils first to drop the
temperature of the liquid.
2. Connect a suitable length of silicone tubing for your application to the desired outlet (OUT)
port on the G20.
3. Connect the silicone tubing to the cooling coil on your fermenter.
4. Run a length of silicone tubing from the fermenter back into the inlet (IN) adjacent to the
outlet chosen on the G20.
5. Insert the temperature probe into the thermowell of the fermenter being controlled.
6. Set the temperature on the temperature controller to the set temperature of fermentation
7. Set the temperature on the temperature controller for the reservoir to -2°C if using glycol. If
you are only using water in the reservoir and not glycol then do not set the temperature of
the reservoir to below 2°C.
When under load such as when cooling a fermenter it can take a longer time than the cooling factor
you have measured to cool the reservoir down to the set temperature and this time is dependent on
a number of variables including and not limited to:
Jacketing of the fermenter (jacketed or non-jacketed)
Number of fermenters being cooled
Ambient temperature
Heat ingress
Cooling fermenters at a large distance away from the G20
The G20 is capable of cooling 200L jacketed fermenters. However, if your fermenter is a large
distance away from the G20 then the submersible pumps may not be able to handle this increased
resistance. Hence, it is suggested for fermenters at a distance that an external pump be used to
transfer the glycol to the fermenter.
1. Connect an external pump to an external temperature controller.
2. Remove the retaining clip and 3/8” plug from the bottom duotight fitting on the nylon sight
tube. Attach 3/8” EVABarrier tubing (KL06248) to the duotight fitting and connect this tubing
to your external pump.
3. Attach tubing to the outlet of the external pump and attach this tube to the cooling coils on
your fermenter.
