Operation

Temperature Adjustment | Reservoir

The temperature of the reservoir is controlled by the STC-1000 controller at the rear of the G20.

Setting the reservoir temperature:

1. Locate the STC-1000 Temperature Controller

2. Hold the S Button until F1 is displayed

3. Press S Button again which will enter temperature adjustment mode

4. Then hold the S Button and Up or Down buttons simultaneously to adjust the set point temperature of the reservoir

5. Once the desired temperature has been entered, press and release the power key to save the parameter

Set the temperature on the temperature controller for the reservoir to between -2° and -6°C if using glycol.

Do not set this to a temperature lower than recommended according to . 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

NOTE: Refer here for the full

For fermentation control, a glycol mix is greatly preferred as the cooling power of the G20 will be much higher than if used wit water alone. This is because the glycol lowers the freezing point so the reservoir can be set to -5°C or lower (depending on ambient, the water/glycol mix and other factors)

IMPORTANT: If you are only using water in the reservoir and not glycol then do not set the temperature of the reservoir below 2°C

The G20.1 includes temperature controllers on the front of the G20 which controls the switching on and off of the submersible pumps and can also be wired to control an external heating source.

To maintain the desired fermentation temperature, set the front controller(s) connected to the fermenter cooling coil or jacket to the desired set point temperature. Ensure the temperature probe for that controller is in a thermowell for the correct fermenter, or taped to the outside of the fermenter and insulated.

To adjust the parameters of the temperature controllers on the front of the G20 follow these steps

• The Cool Indicator flashes during startup delay

• The Cool Indicator illuminates when cooling is active

• The Heat Indicator* flashes during startup delay

Heating is not installed in the Glycol Chiller.

• Hold the Down button for 3 seconds to turn the controller on or off

• Hold the Up button for 3 seconds to display the current Set Point Temperature

1. The Set Point Temperature can be adjusted whether the controller is On or Off

2. Hold the ‘Up’ button for 3 seconds until the number on the display starts flashing (this number is the current set point temperature)

3. Press the ‘Down’ button to decrease the set temperature or press the ‘Up’ button to increase the set temperature

• If the unit emits an alarm, press any key to cancel the alarm

1. Hold the “Up” and “Down” buttons simultaneously for 3 seconds. The first menu code FO will appear on the display

2. Press the “Up” or “Down” buttons to cycle through the parameters F0-F13

3. Press both the “Up” and “Down” buttons simultaneously to alter the parameter which appears on the display

If there is no key operation within 5 seconds then the parameter will be set with the displayed value.

The parameters which can be modified are outlined below

To change any settings on the rear STC-1000 Temperature Controller please refer here for the full

If the glycol solution has been stored for an extended period of time then it is suggested to replace the solution, despite glycol having antimicrobial properties.

To replace the glycol empty the reservoir using the drainage port and then refill with the required concentration of glycol using a refractometer to confirm the concentration.

NOTE: It is recommended to drain and replace the gylcol solution every 12 months to avoid freezing issues, as glycol can break down and lose effectiveness over time

Clean out dust from the radiator periodically to maintain optimum efficiency