Using G40.1 for Fermentation Control
KL04114 | KL47364 | Icemaster Beverage Chiller G40.1 Glycol/Icebank with Digital Control | Fermentation Control
It is strongly recommended to use a dedicated glycol chiller such as a G20 or G40 Fermentation Glycol Chiller with Digital Control for fermentation control.
Although the G40 can be used to control fermentation temperature it should primarily be used to flood a font or dispense product, instead we would highly advise a G20 primarily be used for fermentation control. If you were going to use the G40 for fermentation control then it is suggested you adhere to the following advice and steps.
It is not advised to use the agitator pump to supply glycol to cool a fermenter, this is due to this pump not being powerful enough to overcome the resistance of the cooling coils or large fermenter jacket, and hence it is advised that an external pump be used connected to an external temperature controller (KL01946).
Furthermore, it is not advisable to use the temperature controller on the G40 as a temperature controller for fermentation control. This is because if the fermentation temperature is set on the temperature controller on the G40 it will result in the temperature of the reservoir being set to your fermentation temperature and hence there will not be a high enough temperature differential between the temperature of the glycol and the temperature of the fermenter to maintain stable fermentation temperatures. Instead, the following method should be employed to setup your G40 to cool a jacketed fermenter up to 500L.
Connect an external pump to an external temperature controller
Attach tubing to the ½ inch drainage port on the G40 and connect this tube to your external pump
Attach tubing to the outlet of the external pump and attach this tube to the cooling coils on your fermenter
Run tubing from the outlet of the fermenter cooling coils back into the reservoir of the G40
Set the temperature on the G40 to -2°C (if using glycol) or to 2°C (if only using water in the reservoir)
Attach 10mm ID silicone tube to the “Water Out” barb and connect this silicone tube to the adjacent “Water in” barb. Run the agitator continuously to keep the reservoir agitated and prevent the reservoir from freezing
Insert the temperature probe of the external temperature controller into the thermowell on your fermenter
Set the temperature on your external temperature controller to your set fermentation temperature. This will cycle the pump on and off to supply cold glycol solution only when the temperature of the fermenter increases above the set fermentation temperature. When under load such as when cooling a fermenter it can take a longer time to cool the reservoir down to the set temperature on the glycol chiller. This time is dependent on a number of variables including but not limited to: • Jacketing of the fermenter (jacketed or non-jacketed) • Number of fermenters being cooled • Ambient temperature • Heat ingress
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