Sight Glass and Silicon Tubing Installation
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**If Glycol Chiller has been moved/delivered do not turn it on unless it has been standing upright for at least 24 hours. Failure to do this will void warranty and may damage the unit. Leave the Glycol Chiller upright for at least 24 hours before plugging in mains power after receiving and unboxing**
**Ensure there is at least 100mm of clearance on each side of the Glycol Chiller to allow adequate airflow. Failure to allow adequate ventilation will reduce performance, increase power consumption and void warranty**
**This Glycol Chiller is not intended for cooling wort from boiling or temperatures above 50°C. Using the chiller to cool liquids above 50°C can overload the compressor and will void warranty**
**Do not run the pumps dry or allow the reservoir to ice over. Ensure the pumps are always submerged when in operation. Running the pumps dry or increased resistance due to ice formation can damage the pumps.**
**Whenever the glycol chiller is operating and cooling the reservoir the pumps should be operating**
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**to keep the liquid in the reservoir agitated and avoid ice formation**
**Replace propylene glycol solution every 12 months to avoid potential damage to pumps, lines or reservoir**
### **Before Installation**
1. Let the glycol chiller sit for at least 24 hours after delivery or after sitting on its side before
turning the unit on
2. Ensure there is adequate ventilation (at least 100mm on each side of the glycol chiller)
3. Check for any signs of damage which may have occurred during shipping
### **Assembly | G20** KL16049
First, attach the Sight Glass to the G20 by firmly pushing the included 9.5mm duotight Tee Pieces onto the push fit tubing on the front of the unit as shown.
Check that there are 9.5mm duotight plugs in the opposite end. Install the EVABarrier Sight Glass bewteen the two fittings as shown. Pull firmly on the duotight fittings ensuring they are locked in place.
Next install two lengths of 10mm ID silicone tubing to the **OUT** barbs. Connect each of these to the adjacent **IN** barbs as shown. This is to loop the input and output for testing.
With the G20 unplugged fill the reservoir with water until the water level reaches the top of the sight glass
Install the temeprature probes - push the male connector of the temperature probe into the female socket by each temeprature controller.
Sight Glass and Silicon Tubing Installation
**power** key to
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save the parameter
NOTE: Refer here for the full [**STC-1000 Instruction manual**](https://www.kegland.com.au/media/pdf/stc1000%20instructions.pdf)
Performing this test you can get a rough guide of the cooling factor of the glycol chiller when *not* under
load. To determine this note the starting temperature of the water in the reservoir and then
measure how long it takes to drop the temperature to 2°C
### Leak Testing
Prior to putting any beer into the fermenter for cooling you should leak test your whole system. Refer to [Fermenter Setup](https://docs.kegland.com.au/products/cooling-equipment/g20-glycol-chiller-or-user-guide/fermenter-setup) specific to the G20 for this.
Set the temperature on the temperature controller to 2C and test that there are no leaks in the
system including into the fermenter itself.
After all testing is complete, empty the reservoir by removing the plug on the bottom 3/8” duotight
fitting on the nylon sight tube. This can be achieved by removing the blue retaining clip on the
duotight fitting and pushing in on the collar as you pull on the plug. After you have drained the
reservoir put the plug retaining clip back in place.
The system has now been tested for cooling and leaks and is ready to be used to cool a fermenter.
### Filling the Reservoir
The G20 can be operated with either just water in the reservoir or both water and glycol to reduce
the freezing point of water.
**For fermentation control, a glycol mix is greatly preferred as the cooling power of the G20 will be much higher than if used with 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**
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**temperature of the reservoir below 2°C**
**Fill the reservoir to the top of the sight glass with water or a water/glycol mix**
if the reservoir is filled with water set the reservoir temperature controller to 2°C. If using glycol solution the reservoir temperature can be set below 2°C according to the
table below.
Ensure the cooling coils are submerged. The amount of glycol required to be added to
the reservoir depends on the desired set temperature of the reservoir which is dependent on a
number of factors including how many fermenters are being cooled, the ambient temperature the
fermenters are in and heat ingress etc. Use the table below to determine what percentage of glycol
you require.
### Settting Reservoir Temperature
The reservoir temperature is controlled with the STC-1000 Temperature Controller.
To set the reservoir temperature:
1. Hold the ‘S**’** button until **F1** is displayed
2. Press ‘**S**’ again which will enter temperature adjustment mode
3. Then hold ‘**S**’ *and* up or down buttons simultaneously to adjust the set point temperature of the
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reservoir
4. Once the desired temperature has been entered, press and release the **power** key to
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save the parameter
NOTE: Refer here for the full [**STC-1000 Instruction manual**](https://www.kegland.com.au/media/pdf/stc1000%20instructions.pdf)
**Do not set the Set Point Temperature of the reservoir below 2°C if using water (instead of a glycol solution) in the reservoir** (AKA an icebank setup)
Refer to the [Glycol Percentage Chart](#glycol-percentage-chart) below for recommended Set Point Temperatures with corresponding glycol percentage
### Glycol Percentage Chart
| Glycol Volume % | Freezing Point (°C) | Specific Gravity at 20° |
| --------------- | ------------------- | ----------------------- |
| 0 | 0.0°C | 1.000 |
| 10 | -3.3°C | 1.006 |
| 20 | -7.8°C | 1.015 |
| 30 | -13.3°C | 1.024 |
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.