On Line Support - ISTC LNS10A LN2 Generator Installation & Commission

November 2025, we delivered an LNS10A liquid nitrogen generator to the International Science and Technology Center (Kyrgyzstan office). The customer requested remote installation guidance and operational support last week. This case study documents the entire technical service process, from equipment installation and commissioning to final stable operation.

Background

At the end of November 2025, we delivered an LNS10A liquid nitrogen generator to the International Science and Technology Center's Branch office in Kyrgyzstan. Last week, the end-users contacted us requesting remote installation and operational guidance.

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Problem Diagnosis and Resolution Process

1. The installation process was supposed to be very simple, but a minor issue arose due to the long-distance land transportation.

The staff noticed that the water inlet pipe of the built-in chiller was loose, which would cause problems during water filling. Upon examining the pictures, we found that due to the long-distance land transportation of over 5300 kilometers, including transshipment, the journey was likely bumpy, causing the water pipe to detach from the chiller's inlet.

Following the instructions, staff manually reinserted the pipe into the inlet, and the problem was resolved.

2. The customer connected the plug, but found that the cryocooler unit displayed "Slide" during operation, preventing nitrogen liquefaction.

Initially, we suspected that the long-distance transportation had caused the cryocooler unit's connectors to loosen, but the photos sent by the on-site staff showed no problems, and the PLC power supply and wiring were also secure. After troubleshooting by the on-site staff and our remote monitoring guidance, it was finally discovered that the equipment was unable to operate normally due to an accidental press of the "Emergency Stop" button.

After the staff reset the "Emergency Stop" button, the machine immediately showed that it was working correctly.

Monitoring and Guidance of the Liquefaction Process

1. Initial Operation Phase:

On the second day after the equipment started running, the staff sent pictures showing that the cryocooler's operating temperature had reached the nitrogen liquefaction temperature (-189℃), but the liquid level display still showed 0.

Since this was the first time the liquid nitrogen generator was started, it takes some time to lower the temperature of the Dewar flask to the liquefaction temperature. Also, because the liquid level gauge does not reach the bottom of the Dewar flask, even if there is a small amount of liquid nitrogen inside, the liquid level gauge cannot display the correct level. Therefore, we instructed the customer to continue operating the equipment.

2. Stable Operation Phase:

On the morning of the third day, the equipment had been running continuously for 48 hours. The liquid level gauge showed that the liquid nitrogen in the Dewar flask had reached 44.3%, and the instantaneous liquid nitrogen production reached 0.49 liters/hour. This calculates to a liquid nitrogen production rate of 11.76 liters/day. The customer decided to continue running the equipment until the liquid level reached the automatic stop level of 85%.

Liquid Nitrogen Dispensing and Feedback

1. Liquid Nitrogen Dispensing

On Monday, we contacted the customer to check the machine's operating status. The screen displayed a liquid level of 80.4% and a chiller temperature of -36 degrees Celsius. The equipment had entered automatic standby mode to save energy. After inspection, we found that the equipment was operating normally, with good liquefaction efficiency and a high liquid level, indicating low liquid nitrogen evaporation during standby. After communication, the customer decided to drain all the liquid nitrogen. We reminded the staff to wear protective equipment and to open the shut-off valve slowly.

A short video of the liquid nitrogen draining process recorded at the customer's site is attached.

2. Customer's Feedback

During our communication, we learned that the liquid nitrogen produced by this LNS10A unit is used to service the gamma-ray detector at the center, with a weekly consumption of 15-25 liters of liquid nitrogen. The equipment fully meets the instrument's liquid nitrogen requirements, and the customer is very satisfied with the equipment!

Summary

This after-sales service overcame multiple challenges, cross-border distance, language barriers, and remote diagnostics, demonstrating that our products can operate reliably overseas and meet users' needs for on-site liquid nitrogen production.

1. Rapid response capability: Real-time problem diagnosis through multiple channels including language, pictures, and videos.

2. Professional knowledge guidance: Accurately explaining equipment characteristics and addressing customer concerns.

3. Efficient problem solving: All major problems were identified and resolved within one hour.

4. Comprehensive customer training: Ensuring end-users understand the equipment principles and safety operating procedures.

Case Study Insights

1. For long-distance transportation, the length and securing of the chiller inlet hose need to be reinforced. This update has already been implemented in the new models.

2. The initial startup instructions should provide a more detailed explanation of the time characteristics of the liquefaction process.

3. The remote support tools can be further optimized to improve diagnostic efficiency.

4. The emergency stop button needs protective casing to prevent accidental activation.

This case fully demonstrates the reliable performance of the LNS10A liquid nitrogen generator after complex transportation conditions, as well as the professional capabilities of our company's remote technical services, providing valuable experience for future international after-sales service.