1. Taking the preparation of 1000 L coolant as an example, what is the addition amount of the corrosion inhibitor and the subsequent operations?

Take 50 kg-70 kg of the composite corrosion inhibitor, add it to a stirring container, and then add deionized water (with a requirement of conductivity≤5 μS/cm) and ethylene glycol mixture to a total mass of 1000 kg, stir evenly, and test pH of the coolant to be around 8.0 before use.

2. How should the corrosion inhibitor be stored?

It should be stored in a cool and dark place where the temperature does not exceed 30 ℃.

3. What precautions should be taken when using the officially recommended corrosion inhibitor?

Operators must wear protective glasses and gloves. If it comes into contact with the skin, rinse it with clean water immediately. Mixing with corrosion inhibitors of other brands is prohibited. When adding, ensure the proportion is correct, and an entire hydro-cooling cycle system must be thoroughly cleaned before use.

4. What is a main function of the corrosion inhibitor in the coolant?

Corrosion can damage the integrity of metals, leading to thinning, clogging, perforation of pipelines or damage to components (especially hydro-cooling plates of hydro-cooling miners). The corrosion inhibitor prevents or slows down the corrosion of metal components in a hydro-cooling cycle system, protects metal pipelines and components, and extends the service life of the hydro-cooling cycle system.

5. What is the officially recommended corrosion inhibitor?

The composite corrosion inhibitor from Peric. You can contact our company to purchase it.

6. What is the recommended addition concentration of the official corrosion inhibitor?

5 wt% - 7 wt%.

7. What constitutes a special coolant for hydro-cooling miners? What requirements are there for the coolant?

It consists of pure water (or distilled water) + special corrosion inhibitor + antifreeze (a ratio is selected according to a freezing point). The coolant must meet relevant indicators. Regular testing is also required, and the coolant must be replaced if the indicators exceed the standard. Detailed information can refer to the operation guide.

8. Replacement/Maintenance Frequency: how often should the coolant be changed or filled in under normal usage? Are there signs we should watch for to know when it needs replacing?

The coolant (i.e., liquid) needs to be regularly tested and replaced. The testing cycle and indicators are as follows. For more detailed information, please refer to hydro-cooling miner operation guide on our official website.

(https://support.whatsminer.com/en-US/article/485?title=WhatsMiner%C2%A0Hydro-Cooling%C2%A0Miner_Operation%C2%A0Guide).

* indicates that this index must be checked

9. Do you have recommended or certified suppliers?

Sure. For hydro-cooling suppliers, we recommend our partners HeatCore, Hash House, and Giga Energy. We have tested and certified some of their products. Their systems are very compatible with our miner, and you can further communicate with them according to your own needs to find the one that suits you.

For details, you can get some information on our official website. I will give you some contact information below.

10. Do you deliver the coolant together with the miners?

Our miners cannot have the coolainside when they are delivered and shipped to you.

11. Is the coolant safe for all miner components? Does it require specific container materials?

The coolant cannot flow into the hashboard and power supply, otherwise it will cause damage. In addition, it is recommended to purchase the coolant from WhatsMiner or purchase the model specified by WhatsMiner. We are not responsible for any damage to the miner caused by the use of coolant or corrosion inhibitors that have not been tested by WhatsMiner.

However, for the cycle system, there are something worth noting. For example, the cycle system must consider rust and corrosion prevention. It is recommended to use stainless steel pipes, and copper is prohibited from appearing in the cycle system. Cooling plates are made of aluminum. If the cycle system contains copper, there will be electrochemical corrosion. Carbon steel pipe welds have a lot of welding slag, which is difficult to clean and prone to rusting and corrosion. The cooling plates or connectors have a risk of corrosion and blockage, which may cause damage to the hydro-cooling miner. For more details, you can refer to hydro-cooling miner operation guide on our official website.

(https://support.whatsminer.com/en-US/article/485?title=WhatsMiner%C2%A0Hydro-Cooling%C2%A0Miner_Operation%C2%A0Guide)

Regarding to the second question, there are no specific container materials.

12. What is the current price per liter?

The coolant is usually recommended to be purchased locally and configured by oneself. As you know, the coolant generally consists of pure water (or distilled water), specialized corrosion inhibitors, and antifreeze. You can purchase corrosion inhibitors locally, usually recommended by suppliers. Or we can also help with procurement. In addition, you can purchase ethylene glycol (as antifreeze) with a concentration that meets the freezing point requirements locally or configure it yourself according to your needs, and the price is subject to local purchase. The following table introduces freezing points of ethylene glycol at different concentrations.

Finally, if you want to know how to configure the coolant, you can refer to hydro-cooling miner operation guide on our official website.

(https://support.whatsminer.com/en-US/article/485?title=WhatsMiner%C2%A0Hydro-Cooling%C2%A0Miner_Operation%C2%A0Guide)

13. Does it have any specific handling or storage requirements?

It should be stored at room temperature and away from light.

14. Regarding hydro-cooling miners, what testing is required for the coolant before winter?

A freezing point of the coolant must be tested in a timely manner to confirm whether it meets antifreeze requirements. This avoids the risk of miner freezing damage caused by not adding antifreeze or insufficient antifreeze dosage.

15. What are requirements for the coolant used in a hydro-cooling system?

You can refer to the following content for details.

If a liquid medium uses pure water + special corrosion inhibitor + antifreeze, parameters related to the liquid temperature and the liquid flow of ethylene glycol or propylene glycol solution + pure water (distilled water) + special corrosion inhibitor are shown in Table 15‑1.

Table 15-1

Initial index requirements for coolant and coolant test indicators and cycles are shown in the following tables.

Table 15‑2

Table 15‑3

Note: * indicates that this index must be checked.