ANTSPACE V5 Liquid Cooling System Instruction Manual

ANTSPACE V5 Liquid Cooling System

Specifications

• Model: ANTSPACE HK3
• Version: V2/V3/V5
• Type: Liquid Cooling System

Product Information

Summary of the ANTSPACE HK3
The ANTSPACE liquid cooling system is designed to provide coolant meeting pressure, temperature, and flow rate requirements for the internal heat dissipation unit of mining machines. It ensures a conducive working environment for load by employing either evaporative cooling or water-water heat exchange.

Composition and Working Principles of the ANTSPACE HK3
Composition of the System
The major components of the ANTSPACE liquid cooling system include:

• Pump station
• Cooling tower
• Electric cabinet
• Network system and PDC
• Water separator assembly fitting

Working Principles
The system functions involve transporting and monitoring coolant status, transferring heat, controlling pump station operations, distributing network and power, and supporting water cooling system parts and accessories.

Functions of Components:

• Pump station: Provides coolant with necessary temperature, pressure, flow rate to meet requirements
• Cooling tower: Transfers heat from load to atmosphere through forced air exchange
• Electric cabinet: Controls operation of system components
• Network system and PDC: Distributes network and power for mining machine
• Water separator assembly fitting: Distributes and delivers flow, supports water cooling system parts

The cooling process involves conveying coolant from the pump station to the water distributor assembly, then to the water cooling plate for heat dissipation. After heating, the coolant goes through either the cooling tower or plate heat exchanger for cooling before returning to the water cooling plate.

Product Usage Instructions

Use and Operation of ANTSPACE HK3
To effectively use the ANTSPACE HK3 liquid cooling system, follow these steps:

1. Ensure all components are properly connected and powered.
2. Check coolant levels and quality regularly.
3. Maintain proper airflow around the system for efficient heat exchange.
4. Refer to the operation manual for specific settings and adjustments.
5. Monitor system performance regularly for any abnormalities.

FAQ
Common Questions about ANTSPACE HK3 Liquid Cooling System:

1. Q: How often should I check the coolant levels?
   A: It is recommended to check coolant levels at least once a month to ensure optimal performance of the system.

2. Q: Can I use any brand of antifreeze for the cooling system?
   A: It is advisable to use legitimate brand antifreeze or purified water based on local ambient temperature for best results and system longevity.

Summary of the ANTSPACE HK3
ANTSPACE liquid cooling system aims to continuously provide coolant that meets the requirements of pressure, temperature and flow rate for the internal heat dissipation unit of mining machine, and ensure a good working environment for load. There are two heat dissipation forms for the ANTSPACE liquid cooling system: evaporative cooling (cooling tower) or water-water heat exchange (plate heat exchanger). The internal cooling medium can choose the legitimate brand antifreeze or purified water according to the local ambient temperature.

Composition and Working Principles of the ANTSPACE HK3

Composition of the system
Table 2-1 Major components of ANTSPACE liquid cooling system

valve, exhaust valve, filter, pipeline and other related accessories
Cooling tower| To transfer heat from the load to the atmosphere| Spray pump, cooler, air inlet grill, fan and other related accessories

Electric cabinet

| To control the operation of each component of the pump station, read and upload the numerical display of each sensor| Air switch, intermediate relay, programmable logic controller (PLC), switch power supply, touch screen and other related accessories
Network system and PDC| Distribution of network and power for mining machine| Circuit breaker, aviation connector, cable, switch and other related accessories
Water separator assembly| Distribution and delivery of flow| Water distributor, elbow, hose, chuck, valve and other related accessories
Fitting| Supporting parts and accessories for container water cooling system| Screw, miniature circuit breaker, aviation plug, clamp, rubber hose and other related accessories

Working principles
The pump station provides two ways of coolant with temperature, pressure, flow rate and medium to meet the requirements to the water distributor assembly, the water distributor conveys the coolant to the water cooling plate after two stages of liquid distribution, and the water cooling plate takes away the heat inside the equipment; the coolant after heating enters the cooling tower and the outside air for forced heat exchange, or enters the plate heat exchanger and the outside cold source for cold exchange, and the coolant after cooling is again conveyed to the water cooling plate through the pump station and the water distributor assembly. The coolant after cooling enters the cooling tower and the outside air for forced heat exchange or enters the plate heat exchanger and the outside cold source for heat exchange. The working principle of Dry-Wet Combined Type Air Cooling Tower is divided into dry working condition and wet working condition.
Its working principle under wet condition is as follows: The cooling tower takes water and air as the cooling medium, and USES partial evaporation of cooling water to take away the heat generated by cooling fluid flowing in the coil. Inside are: spray device, snake type condensing coil, (packing heat exchange layer) water remover, bottom set water tray. The outside of the box is equipped with a circulating pump and an axial fan on the side of the condensing coil. During operation, the cooling water is sent from the pump to the upper part of the condenser coil and the liquid condensed by the cooling water outside the tube flows from the lower part of the condenser coil And out the other. After absorbing the heat from the refrigerant, some of the water is evaporated into water vapor, which is sucked up by the axial fan and discharged into the atmosphere. The cooling water that has not evaporated falls on the lower collector plate, which is used for recycling by the water pump. The axial circulating fan is drawn by the top to strengthen the air flow, the negative pressure in the water tank, to reduce the evaporation temperature of water, to promote the evaporation of water film, and to strengthen the heat release of the condensing coil. The role of the water eliminator is to block unevaporated water droplets in the air and make It leaves the water tray to reduce the consumption of cooling water. In addition, the float ball valve is also set in the water pan. When the water is continuously evaporated, the float ball valve will open automatically, providing supplementary cooling water. The working principle under dry working condition is to force the higher temperature coolant from the water cooling plate to exchange heat with the low-temperature air, and the coolant after reducing the water temperature enters the system again through the pump set for heat dissipation.

Figure 2-1 Schematic diagram of ANTSPACE liquid cooling system

Summary of functions of valves in schematic diagram

No.| Name| Function| State| Remark
1.| 1#ball valve| Drain of Liquid separator| Closed|
2.| 2#ball valve| Drain of Main pipeline| Closed|
3.| 3#ball valve| Drain of Main pipeline| Closed|
4.| 4#ball valve| The safety valve can be closed for maintenance in case of safety valve failure| Open Closed(Pressurization)|
5.| 5#ball valve| The valve at the front end of the make-up filter shall be closed during filter maintenance| Open|
6.| 6#ball valve| The liquid can be added to the tank after opening this valve after opening this valve| Closed|
7.| 7#ball valve| The liquid can be added to the system after opening this valve| Open|
8.| 8#ball valve| The tank is connected with the system and can automatically replenish or discharge liquid after opening this valve| Open|
9.| 9#ball valve| After opening this valve, the external liquid can be replenished to the inside of the system / tank during liquid filling; When discharging liquid, the liquid inside the tank can also be discharged| Closed|
10.| 10#ball valve| The expansion vessel can be serviced by closing the valve| Open Closed(Pressurization)|
11.| 11#ball valve| The exhaust valve on the top of degassing tank can be serviced by closing the valve| Open|
12.| 12#ball valve| The exhaust valve can be serviced by closing the valve| Open|
13.| 13#ball valve| The Y-filter can be serviced by closing the valve| Closed|
14.| 1# butterfly valve| When the ambient temperature is low, open this valve to reduce heat exchange| Closed|
15.| 2# butterfly valve| The valve of the water separator on the left side of the return liquid shall cooperate with 4# butterfly valve to isolate the water separator assembly on the left side| Open|
16.| 3# butterfly valve| The valve of the water separator on the right side of the return liquid shall cooperate with 5# butterfly valve to isolate the water separator assembly on the left side| Open|
17.| 4# butterfly valve| The valve of the water separator on the left side of the liquid supply is matched with 2# welded butterfly valve to isolate the water separator assembly on the left side| Open|
18.| 5# butterfly valve| The valve of the water separator on the right side of the liquid supply is matched with 3# welded butterfly valve to isolate the water separator assembly on the left side| Open|
19.| 6# butterfly valve| Due to this liquid supply valve, the ANTSPACE cooling system is independent, and closing the valve can facilitate the movement of the system. In addition, when cooperating with 8# welded butterfly valve to maintain the filter, the system does not need to discharge a large amount of liquid| Open|
20.| 7# butterfly valve| Due to this return valve, the ANTSPACE cooling system is independent. Closing the valve can facilitate the movement of the system| Open|
21.| 8# butterfly valve| Due to this liquid supply valve, the cooling tower is independent, and closing the valve can facilitate the movement of the system. In addition, when cooperating with 8# welded butterfly valve to maintain the filter, the system does not need to discharge a large amount of liquid| Open|
22.| 9# butterfly valve| Due to this return valve, the cooling tower is independent. Closing the valve can facilitate the movement of the system| Open|
23.| 1# Pressure gauge| The water pump suction pressure gauge can judge whether the water pump suction pressure (≥ 0.1MPa) is normal, and check whether the water pump suction pressure sensor is normal| /|
24.| 2# Pressure gauge| The outlet pressure gauge of the water pump, together with 1# pressure gauge, can analyze whether the operating condition of the water pump is consistent with the design condition (the difference is the pump head at this time)| /|

| 3# Pressure gauge| The pressure gauge of main liquid supply pipeline shall cooperate with 2# pressure gauge to analyze whether the outlet pressure of water pump is normal and whether there is fault in the system| /|
---|---|---|---|---
26.| 4# Pressure gauge| The pressure gauge of the left branch pipe for liquid supply, together with 6# pressure gauge, can analyze whether the flow resistance of the left water separator assembly is normal| /|
27.| 5# Pressure gauge| The pressure gauge of the right branch pipe for liquid supply, together with 7# pressure gauge, can analyze whether the flow resistance of the right water separator assembly is normal| /|
28.| 6# Pressure gauge| The pressure gauge of the left branch pipe for liquid supply, together with 4# pressure gauge, can analyze whether the flow resistance of the left water separator assembly is normal| /|
29.| 7# Pressure gauge| The pressure gauge of the right branch pipe for liquid supply, together with 5# pressure gauge, can analyze whether the flow resistance of the right water separator assembly is normal| /|

Main technical specification of the ANTSPACE HK3

Table 3-1 System performance indicators

Environmental indicators
1.| Working temperature| -35～40℃| Outdoor
Working temperature| 5～40℃| Indoor （The temperature range can be controlled by adjusting the

fan）

2.| Working humidity| 10～90%|
3.| Storage temperature| -35～70℃|
4.| Storage humidity| 5～95%|
5.| Height above sea level| ≤2000m|
Container Specifications
1.| Dimensions (LWH) (mm)| 6058×2438×2896|
2.| AntMiner capacity| 210 units -S19 Hydro Series|
3.| Container Certification| CCS|
4.| Safety Certification| NFPA 79:2021（V2 version） UL 508A:2018 R8.21（V2 version） CSA C22.2 No. 14-18（V2 version） ANSI/ISO 12100:2012（V2 version）
2014/35/EU（V5 version）2006/42/EC（V5 version）|
5.| Operating Power (kW)| 1047～1050| Excluding cooling tower power consumption
6.| Input voltage and frequency| 415V±5%/60Hz（V2 version） 400V±5%/60Hz（V3/V5 version）|
7.| Transport Weight(t)| 8| Excluding miner and coolant
8.| Operating Weight(t)| 12| Including miner and coolant
9.| PDU main switch capacity (A)| 1200A（V2 version） 1250A（V3/V5 version）| The container contains two power distribution cabinets, each with a 1200A (UL)/1250A(CE)main switch.
---|---|---|---
10.| Rated Current (A)| 952| The rated current of each distribution cabinet in the container is 952 A.
11.| Rated Power (kW)| 1047| Excluding cooling tower power consumption
12.| Max Power (kW)| 1050| Excluding cooling tower power consumption
13.| Rated Current per PDU (A)| 10| The container contains two power distribution cabinets, each with a 1200A (UL)/1250A(CE)main switch.
14.| Connection Interface （Cooling Tower）| DN125（GB/T 9119-2010 PN16 DN125）|
15.| Connection Interface (Heat Exchange Interface)| DN100（GB/T 9119-2010 PN16 DN100）|
16.| Flow Rate (m³/h)| ＞85|
Cooling Tower Specifications
1.| Type| Dry-Wet Combined Type Air Cooling Tower|
2.| Dimensions (LWH) (mm)| 6058×2438×2896| Excluding cage ladder
3.| Heat Dissipation Capacity (kW)| 1000|
4.| Outlet Temperature| 35℃±1℃| @ 28℃ Wet Bulb Temperature
5.| Container Certification| CCS|
6.| Safety Certification| NFPA 79:2021（V2 version） UL 508A:2018 R8.21（V2 version） CSA C22.2 No. 14-18（V2 version） ANSI/ISO 12100:2012（V2 version） 2014/35/EU（V5 version） 2006/42/EC（V5 version）|
7.| Operating Power (kW)| 14~28|
8.| Transport Weight(t)| 7t|
9.| Operating Weight(t)| 12t|
10.| Connection Interface (Container)| DN125（GB/T 9119-2010 PN16 DN125）|
11.| Water Resupply Hose Interface| DN40（Internal thread）|
12.| Drain Hose Interface| DN65（Internal thread）|
13.| Noise Level @25℃, 16m| 70dBA|
14.| Water Consumption| 1～1.5m³/h|

Structural view of ANTSPACE HK3

External view of ANTSPACE Liquid Cooling System

Figure 4-1-1 External view 01 of ANTSPACE liquid cooling system

Figure 4-1-2 External view 02 of ANTSPACE liquid cooling system
Internal view of ANTSPACE Liquid Cooling System

Figure 4-2-1 Internal view 01 of the container

Figure 4-2-2 Internal view 01 of the water separator assembly

Figure 4-2-3 Internal view 01 of the front door of the container

Figure 4-2-4 Internal view 01 of the pump station
The status and functions of common valves are summarized as follows:

• 4#ball valve(open)：The safety valve can be closed for maintenance in case of safety valve failure， It is normally open except that it is closed during pressurization.
• 6#ball valve(closed): The liquid can be added to the tank after opening this valve after opening this valve.
• 7#ball valve(open): The liquid can be added to the system after opening this valve.
• 8#ball valve(open): The tank is connected with the system and can automatically replenish or discharge liquid after opening this valve.
• 9#ball valve(closed): After opening this valve, the external liquid can be replenished to the inside of the system / tank during liquid filling; When discharging liquid, the liquid inside the tank can also be discharged.

Figure 4-2-5 Internal view 02 of the pump station

Figure 4-2-6 Internal view 03 of the pump station

Figure 4-2-7 Internal view 04 of the pump station

Figure 4-2-8 Internal view 01 of ECC

Figure 4-2-9 Internal view 01 of PDC

Use and Operation of ANTSPACE HK3

Safety regulations

• A symbolic distinction indicating the degree of danger “ ” is the logo for electrical charge. It is forbidden to open the cover plate with the logo.

Precautions for operation

1. Filtered coolant should be used as the cooling medium, and there should be no floating objects, or particles in the liquid supply circulation system.
   Note: the cooling medium should use the coolants produced by manufacturers. It is not allowed to make them with different substances by yourself. Otherwise, we will not be responsible for any problems. It is recommended to choose organic coolants. Inorganic coolants contain phosphorus, silicon, boron, molybdenum, nitrate, etc., which will generate precipitate over a long time. The recommended manufacturers for coolants: Great Wall brand, Shell brand, etc.

2. When the ambient temperature is below 0 ℃, the water in the sump and spray pipeline must be completely discharged to prevent icing damage to the equipment.

3. The equipment should not be wired without permission, and it is forbidden to be used in parallel with other equipment.

4. If the equipment has abnormal conditions (such as burning smells, etc.), it should be shut down, disconnected from the power supply, and checked.

5. There is an emergency stop on the entry door and on the door of electric cabinet A and B, when an emergency occurs, press the emergency stop, then the power circuit breaker will be disconnected immediately. After the emergency is reset, turn the main circuit breaker to the OFF position before power on the switch again；
   Figure 5-1-1 Emergency stop button

6. The Circuit breaker MCB-A1 only can de-energize PDC A.

7. The Circuit breaker MCB-A2 only can de-energize PDC B. Figure5-1-2 MCB-A2

8. The Circuit breaker MCB17 only can de-energize control cabinet ;

9. In order to prevent hazards, when a single computing unit is repaired, disconnect with the corresponding power supply of the computing unit in PDC, disconnect with the corresponding network cable, water supply of the computing unit, and finally disconnect with the power supply of the computing unit.
   To power off the entire container, perform the following steps:

   • First, 210 computing units are disconnected. Figure 5-1-3 Schematic diagram of the air switch of a PDC

   • After 10 seconds, disconnect the main power supply of the control device. Figure 5-1-4 Schematic diagram inside the ECC

   • Disconnect the main switch of the two PDC.
     Note: The lighting circuit of the container is led from the main PDC. Bring a portable lighting lamp with you if you want to perform the above operation.  Figure 5-1-5 Schematic diagram of the main air switch of PDC

   • Disconnect the main switch at the transformer end if necessary. Be reminded that the sequence for switch off should be strictly conducted in accordance with the above requirements.

10. Do not open the protective cover on the fan.

11. Do not operate the device with wet hands; otherwise, electric shock may occur. It is forbidden to put sundries inside the unit to ensure that the fire passageway is always unblocked.

Note: If the equipment does not work over a long time, disconnect the main power supply.

Pressure test of the system
Preparation for the pressure test:

1. Get hoses and air pumps ready; (Recommended brand: Outstanding, model 2200w-40L; Selection basis: The internal volume of the system is about 1.5m3/h, and the corresponding exhaust volume air pump is selected according to the time requirements; the maximum output air pressure is more than 8bar, and 10bar is the best)
2. Connect the external pipeline according to the ANTSPACE field installation manual.
3. Check if the automatic exhaust valves or the ball valves on the internal and external pipes of the container are closed. Screw the top nut of the automatic exhaust valve to open/close the automatic exhaust valve. (See Figures 6-2-1 through 6-2-4).

Figure 5-2-1 Pump station – automatic exhaust valve

Figure 5-2-2 Schematic diagram of opening and closing of automatic exhaust valve

Figure 5-2-3 External connecting pipelines – automatic exhaust valve

Figure 5-2-5 Schematic diagram of opening and closing of ball valve
Procedures for the pressure test:

1. Check again whether the exhaust valve and the ball valve are closed;

2. Close the NO.7 Ball Valve;

3. Refer to 5-2-6 for example, using a bellows to connect the manifold inlet and outlet and open all mini ball valves on the water distributor； Figure 5-2-6 System – chuck connection

4. Connect the air pipe to any fast plug-in interface, and close the corresponding ball valve. Figure 5-2-5 System – ball valve for connecting pipelines

5. Use an air compressor to press to 7 bar, keep the pressure for more than 30 minutes, and check for leakage;

6. Key sites for inspection are as follows:

   • Connection between the fast connection-peg and the mini ball valve;
   • Joint between the quick plug ball valve and the bellows;
   • Connection between the mini ball valve and the water separator;
   • Connection between the fast-plug connector and the computing equipment;
   • Flange/chuck/thread/welded joints.
     Figure 5-2-7 System – Flange/thread/welded joints

7. The check methods are as follows:

   • Seeing, hearing and touching are applicable to leakage inspection.
   • Choose one of soap, washing powder and detergent, add water to one of them to make soapy liquid and apply it to the suspected leakage points, especially at the connections. The part with bubbles is the leak point.

8. Repressurization：
   After the high-calculus server is online, it needs to be checked again for gas-liquid mixture, pressure 7 bar, stable for more than 2h, and check whether there are leakage points in the above

The system filled with coolant
System rehydration consists of four steps:

1. Preparation: prepare materials and tools and open all exhaust valves of the system;
2. System fluid replenishment: use self-priming pump and fluid replenishment pump to replenish the system;
3. Replenishment of water tank: replenish the water tank with the cooperation of self-priming pump and replenishment pump;
4. Regular replenishment: self priming pump and replenishment pump can be used together, or the manual replenishment port on the top of the water tank can be used to replenish the water tank;

Step 1: preparation

1. Get the coolant ready.
2. Connect the external pipeline according to the ANTSPACE field installation manual;
3. Check if the automatic exhaust valves or the ball valves on the internal and external pipes of the container are opened. (See Figures 5-3-1 through5-3-3); Figure 5-3-1 Internal container – automatic exhaust valve Figure 5-3-3 External connecting pipelines – automatic exhaust valve****
4. Open the top exhaust valve of the water tank and install the chuck, ensuring that the tank is connected to atmospheric pressure. (See Figure 5-3-2).

Figure 5-3-2 Manifold-Air Vent Valve
Step 2-3：Procedures for the coolant charge:

1. A self-priming pump must be installed outside the container， The self-priming pump needs to inject liquid into the pump head for the first time. Find the port for coolant charge outside the container (at the side door of the container), plug in the hose, and clean it. External coolant is added into the suction port of the self-priming pump. (see Figure 5-3-4) Figure 5-3-4 Pump station – charging hose
   Note: the recommended brands and parameters of self-priming pumps are as follows:

2. Nanfang pump 25qy-2, rated flow 2m3 / h, rated lift 40m, motor power 1.1kw, electric system 380V / 50Hz;

3. Lingxiao pump bjz150, rated flow 3m3 / h, rated lift 30m, Output Power 1KW, electric system 380V / 50Hz;

4. Nanfang pump 32zw (f) 5-20, rated flow 5M3 / h, rated head 20m, motor power 1.5kw, electric system 380V / 50Hz;

5. Close NO.8 Ball Valve and NO.6 Ball Valve as shown in Figure 5-3-5, open NO.7 Ball Valve, click on the filling pump on the touch screen interface, and turn it on. Figure 5-3-5 Pump station – charging valve
   The refilling pump can be used for refilling both the system and the water tank. If the valve handle is parallel to the pipeline, the valve is in the open state; if the valve handle is perpendicular to the pipeline, the valve is in the closed state.

6. When the system is filled with liquid, if the static pressure reaches more than 0.7 bar (Refer to figure 5-3-7 for touch screen readings), the circulating pump can operate for 10 seconds, and then it should be stopped.

7. Continue to add liquid. Repeat twice to ensure that 1.3 to 1.5 tonnes of coolant is added.

8. When the static pressure reaches 1.0 bars, stop adding coolant(Just observe the reading of the pressure sensor on the main interface, as shown in figure 5-3-7 below). Figure 5-3-7 pressure sensor reading on main interface

9. Then open the circulation pump again, circulate the medium in the system, ensure that the exhaust valves are all opened.

10. Then open NO.6 Ball Valve, close NO.7 Ball Valve, click on the refilling pump on the touch screen interface, and turn it on. Fill the water tank with coolant, and stop refilling coolant when the level gauge in the water tank reaches more than 2/3 (see Figure 5-3-6 for the location of the level gauge). Figure 5-3-6 Pump station – liquid level meter

11. Close NO.9 Ball Valve and NO.6 Ball Valve outside the container, and open NO.8 Ball Valve and NO.7 Ball Valve.

12. After the above operation is completed, the system back pressure (1# pressure gauge/return pressure sensor) will be stabilized at 1-1.5 bar for normal operation.

Step 4：Regular replenishment of water tank
When the water tank needs to add a small amount of coolant, you can open the top exhaust valve of the water tank to install the chuck (see 5-3-6), and manually add coolant to the water tank from the manual feeding port.
Note: If the valve handle is parallel to the valve, the valve is in the open state; if the valve handle is perpendicular to the valve, the valve is in the closed state.

Electrical wiring
There are two 500 kW PDC inside the equipment. In order to ensure the safe and stable operation of the equipment, two three-phase five-wire cables carrying 500 kW should be prepared on site in advance (no specification is specified). The two cables are respectively connected via the upper two holes on one side of the exhaust fan of the container, see Figure 5-4-1.

Figure 5-4-1 Cable inlet hole
(Note: the rainproof cloth and rainproof cover in the accessories shall be used for protection） Three-phase cables are connected to the top of two PDC. The zero line enters to the top of PDC, extends to the zero line row where it is installed and fixed with screws.Both sides of the container have grounding studs, and PDC must also be grounded securely. Therefore, ensure that both the container shell and PDC shell are grounded securely. When leaving the factory, the phase sequence of the equipment has been determined. After the equipment arrives at the site, it only needs adapt to the phase sequence of the on-site substation. The operation is as follows: connect the three-phase power of the substation to the distribution cabinet, power on the electric control cabinet, and observe whether there is power failure; In case of power failure, please adjust the phase sequence connected to the electric cabinet; If there is no fault, it can operate normally. The cooling tower is separated from the container, and above the cooling tower are three cooling fans and a spray pump, as well as a liquid level sensor. After the cold tower is fully secured on top of the container, connect cables to four motors and one sensor. After the cold tower is fully secured on top of the container, connect cables to four motors and one sensor as shown in Figure 5-4-2.

Figure5-4-2 Liquid level sensor

Five wires have been reserved. The sequence of the three cooling fans is not specified, but their wiring sequence is U, V and W (from left to right), the location of cooling fan as shown in Figure 5-4-3.

Figure 5-4-3 Location of cooling tower cooling fan

Among them, cable trough is reserved at the top and side of the cooling tower, and the cables need to be arranged along the trough . The wiring sequence of the spray pump is also U, V and W (from left to right). The position for the liquid level sensor has been reserved. Find the npt1 / 2 nut and gasket from the cooling tower spare parts box, remove the cooling tower air inlet grid, install the liquid level sensor from inside to outside, and install the liquid level sensor as shown in figure 5-4-4 below.

Figure 5-4-4 Installation diagram of liquid level sensor
System power on and power off process
The switches in the electric cabinet are shown in the figure below:

Figure 5-5-1 ECC
Function description of circuit breaker in the system
Table 6-5-1 Function description of circuit breaker in electric cabinet

supply.
MCB18| The system controls the switch of power supply. After the switch is powered on, the system has AC220V power supply.
MCB-DC1| Switch of DC24V power supply in the system. After the switch is powered on, the sensor in the system can read the signal and upload it to PLC; The touch screen is also powered on, which can control the system from the touch screen end.
MCB-DC2| Switch of DC12 power supply in the system. After the switch is powered on, the face recognition and door magnet in the system are powered on; You can open the door by scanning the face.
MCB-DC3| Switch of DC5V power supply in the system. When the switch is powered on, the camera and main control module in the system are powered on.
MSS6| The circuit breaker is a short-circuit protection switch at the front end of the frequency converter, mainly to prevent the frequency converter from overload.
MCB-31| The circuit breaker is a switch in the electric control cabinet that is responsible for disconnecting the excitation coil of mcb17. When the single circuit breaker is closed and the emergency stop button on the container door is pressed, mcb17 is disconnected and the electric control box is powered off.

Table 6-5-2 Function description of circuit breaker in distribution cabinet A

cabinet A, which is responsible for disconnecting MCB-A1. When the single circuit breaker is closed and the emergency stop button on door of distribution cabinet A or container door is pressed, MCB-A1 is disconnected and distribution cabinet A is powered off.

Table 6-5-3 Function description of circuit breaker in distribution cabinet B

cabinet B, which is responsible for disconnecting MCB-A2. When the single circuit breaker is closed and the emergency stop button on door of distribution cabinet B or container door is pressed, MCB-A2 is disconnected and distribution cabinet B is powered off.

Precautions for the first power on of the system
After the wiring of the whole system is completed, the unit can be powered on for commissioning. However, before power on, it is also necessary to use a multimeter to measure whether there is a short circuit between phases, between phases and zero, between phases and ground and between zero and ground of the two power supplies. If not, it means that it can be powered on normally. If there is a short circuit in any of the above items, the fault shall be found out first and then powered on. After the front-end of the system is powered on (the system itself is not powered on), it is also necessary to measure the voltage of the front-end to see whether it meets the power requirements of the equipment.
The power requirements of the equipment are: AC415V± 5%, 60Hz（UL）/ AC400V± 5%, 50Hz（CE）.

System power on sequence
1: First, power on the electric cabinet:
When the electric control cabinet door is opened, first open MCB17, then MCB 18 and MSS6, and then open the circuit breaker at the front end of the frequency converter. MCB -DC1, MCB -DC2 and MCB -DC3 are 24V, 12V and 5V DC switches. After power is applied, ensure that the three switches are on. At this time, the screen on the cabinet door and the PLC begin to work. When the electric control cabinet door is closed and the system needs to be powered on, first open the protection switches in the cabinet MCB18, MSS6, MCB-DC1, MCB- DC2, MCB-DC3 and the front end of the frequency converter, then close the cabinet door and open MCB17 through the cabinet door operating handle. At this time, the device is powered on. Trained electricians can operate the system through the touch screen, set parameters, modify threshold, change operation mode (automatic/manual), start and stop a motor separately or operate automatically. At this time, the liquid cooling system can be operated first to control the liquid supply temperature within the required temperature range, and then the conditions for starting the calculation unit can be met.
2: After the electric cabinet is powered on, the conditions for starting the computing unit can be met only when the liquid supply temperature is maintained near the target temperature according to the operation process of the control system. At this time, the circuit breakers in distribution cabinets A and B can be opened to power on the computing unit.

The power on sequence of distribution cabinet is as follows:
First open MCB-A1 and A2, then MCB-15, 16, 21, 22, B1 and B2, and then start rows of computing units in order as required. Since there are 210 computing units in total, there are 14 rows in total. When starting a computing unit, start the next row at an interval of 20s after starting a row (15 computing units), and so on.

System power-off sequence
When the system needs to be powered off for some reason, first disconnect the power supply of the computing unit according to the requirements, in order to ensure that the water temperature of the computing unit is consistent before and after power failure, which is equivalent to protecting the power module of the computing unit.  When the computing unit is powered off, manually stop the liquid cooling system through the touch screen. At this time, the water temperature will rise slightly, but it has no impact on the system. Finally, disconnect the main power supply of the electric control box and distribution cabinet to make the whole system completely powered off. The above practice is the behavior of safe power failure. However, in case of serious fault in the system, you can directly press the emergency stop button on the inner door of the container to make the main circuit breaker of the distribution cabinet and the main circuit breaker of the electric control box trip instantly, so as to make the system in a complete power-off state, which is convenient for professionals to carry out maintenance work.

Division of personnel responsibilities
Responsibilities of general operation and maintenance personnel:
General power on and power off (disconnect or combine circuit breakers), system startup and shutdown (touch screen key operation), network cable detection and exchange.

Professional electrician responsibilities:
General power on and power off work (disconnecting or combining circuit breakers), system startup and shutdown (touch screen key operation), network cable detection and exchange. When the equipment has short circuit, phase loss, reverse phase, no indication of sensor, no response of corresponding equipment after circuit breaker closing and abnormal

Screen display
Main screen display
After the screen is powered on, the screen displays as follows:

Figure 5-6-1 Main screen display
The main screen displays the unit control mode “automatic / manual”, target temperature (settable), total fault display and analog quantity display. The system can set the operation control mode of the unit through the main screen. Manual control is used for commissioning and automatic control is used for system operation. When the system needs to run automatically, it is necessary to ensure that the pressure in the system is higher than 0.05Mpa, and then all parameter settings in the parameter setting screen have been set. Then click “one key start” in the main screen, and the motors in the system will be executed according to the automatic control logic sequence. When it needs to be closed, please click “automatic stop” in the main screen.

Manual control screen
When the unit needs to add liquid for commissioning, the unit control mode needs to be adjusted to the “manual” position, and then enter the “manual control” screen, as shown in the following figure:

Figure 5-6-2 Manual control screen
At this time, the motor and frequency converter to be operated can be inched. Generally, when the system is filled with liquid, it is necessary to manually start the make-up pump and circulating pump. However, before starting, it is necessary to ensure that the running direction of the motor is correct. Therefore, after power on, turn on the 1# exhaust fan and observe its running direction. When the wind blows out of the container, it indicates a positive rotation. Before the equipment leaves the factory, all motors have been debugged and rotate forward. Therefore, you only need to observe the running state of one motor. When the motor reverses, it is necessary to phase adjust the three-phase power input to MCB17, that is, change the phase sequence of two cables. 5.6.3 Parameter setting screen

The parameters in the system have been set, and its screen is as follows (it will be displayed in the real screen):

Figure 5-6-3 Parameter setting screen
Real parameter setting value, please follow this setting.

Alarm display screen
After the system runs, if there is a fault in the system, it will be displayed in this screen.

Figure 5-6-4 Alarm display screen
After a fault occurs, the alarm sound will sound. You can click “Silence” to first analyze the cause of the fault, then troubleshoot the fault, and finally click “reset” on the screen.

Historical alarm screen
The alarm information in the system will be saved in this screen with time record, which is convenient for the user to find the time of failure.

Figure 5-6-5 Historical alarm screen
Data curve screen
The information of liquid supply temperature, liquid return temperature, liquid supply pressure, liquid return pressure and liquid supply flow can be displayed in this screen. Each analog quantity corresponds to a different color.

Figure 5-6-6 Data curve screen

Figure 6-6-7 temperature curve

Figure 5-6-8 Pressure curve

Figure 5-6-9 Flow curve
Power and positioning picture
The screen can display the ambient temperature in the three cabinets， the power used by the two distribution cabinets, and the longitude and latitude of the equipment. Among them, power information and longitude and latitude information are used for debugging and display, and the reading format is float type.

Figure 5-6-10 Power and positioning

Common faults and troubleshooting methods of ANTSPACE HK3

Table 6-1 List of common equipment faults and troubleshooting methods

distribution cabinet) to ensure that the electric control box is not charged, and use a flat- blade screwdriver to increase the overvoltage value|
3: Under voltage| 3: Turn off the upper air switch MCB-C (in the power distribution cabinet) to ensure that electric control box is not charged, and use a flat-blade screwdriver to adjust the undervoltage value|

4: Wrong phase

| 4: Adjust the phase sequence of the power line of power distribution cabinet connected to the

electric control box

|
Low liquid level alarm| The water tank level in the container is low| Replenish the water tank in the antsapce|
Circulating pump failure| Idling of the pump, under pressure (low return pressure), etc. lead to overcurrent in the circulating pump|

1. First turn off the air switch (MCB17) in the electric control box;
2. Reset the thermal relay (corresponding to FR1) in the electric control box (manually press RESET in the thermal relay);
3. Check whether the operating parameters of the system are normal (pressure and flow will report failure first), and troubleshoot the problem according to the alarm failure;
4. After an interval of 2-3 minutes, turn on the circulating pump

|
1#/2# Exhaust fan failure| Excessive current of exhaust fan may entrain strips in the fan| 1: First turn off the air switch (MCB17) in the electric control box;|
| blades, hindering the operation of fan| 2: If there is debris in the fan blade, clean the debris first; if there is no debris, and the fan fails for no reason, operator needs to contact the manufacturer
3: Then reset the thermal relay in the electric control box (1# exhaust fan corresponds to FR21; 2# exhaust fan corresponds to FR22) (manually press RESET in the thermal relay);
4: Turn on the exhaust fan after an interval of 2-3 minutes|
---|---|---|---
Refill pump failure| 1: Dirty blockage of the fluid replacement Y-type filter causes overload|

1. First turn off the air switch (MCB17) in the electric control box;
2. Reset the thermal relay (corresponding to FR3) in the electric control box (manually press RESET in the thermal relay);
3. Clean the Y-type filter;
4. After an interval of 2-3 minutes, turn on the rehydration pump

|
2: The position of suction port of the refill pump is too low, resulting in overload|

1. First turn off the air switch (MCB17) in the electric control box;
2. Reset the thermal relay (corresponding to FR3) in the electric control box (manually press RESET in the thermal relay);
3. Make external suction port lower than the coolant tank;
4. After an interval of 2-3 minutes, turn on the refill pump

|
Spray pump failure| The water tank suction inlet filter is dirty, causing overload|

1. First turn off the air switch (MCB17) in the electric control box;
2. Reset the thermal relay (corresponding to FR4) in the electric control box (manually press RESET in the thermal relay);
3. Check if the filter in the cooling tower water tank is dirty and blocked, clean it if dirty;
4. After an interval of 2-3 minutes, turn on the spray pump

| After the system is powered on, the spray pump cannot be idling without liquid in the system
1# cooling fan failure| Excessive current of the exhaust fan may entrain strips in the fan blades, hindering the operation of the fan|

1. First turn off the air switch (MCB17) in the electric control box;
2. If there is debris in the fan blade, clean the debris first; if there is no debris, and the fan fails for no reason, please contact the manufacturer; 3: Then reset the thermal relay in the electric control box (1# fan corresponds to FR51; 2# fan corresponds to FR52; 3# fan corresponds to FR53) (manually press RESET in thermal relay); 4: Turn on the cooling fan after an interval of 2-3 minutes.

|
2# cooling fan failure
3# cooling fan failure
Leakage alarm| Liquid leaked from liquid inlet and outlet of the miner to the floor, soaking the liquid leakage sensor|

1. Find the location where there is liquid on the floor;
2. On the top of this part, carefully look for liquid leakage from the liquid inlet and outlet of the miners;
3. After finding the leaking part, replace quick plug and replace the bellows, then clean the leaking site, and wipe the leaking monitoring tape to dry.

|
Low cooling tower liquid level alarm| The water level in the cooling tower decreases| Replenish the cooling tower in time and reset the fault| After the cooling tower liquid level low alarm occurs, the system starts timing. After about 50 minutes, the spray pump
| | | stops spraying. In order to prevent the miner from overheating due to the spray pump stopping spraying, please replenish the cooling tower in time after the alarm.
---|---|---|---
High liquid supply temperature alarm| 1: The cooling fan does not run| Check whether the fan is running normally, check whether the power supply circuit of the fan is normal|
2: The spray pump does not run| Check whether the spray pump is running normally, and check whether the power supply circuit of spray pump is normal|
3: The temperature sensor is damaged| Replace the temperature sensor; the high alarm value of liquid supply temperature can be set on the screen as required|
4: The water level of the cooling tower is abnormal| Check the water level of the cooling tower to ensure normal water replenishment|
High supply liquid temperature alarm| After the high liquid supply temperature alarm occurred, the operation and maintenance personnel did not deal with it in time, causing the liquid supply temperature to continue to rise| Before finding out the cause, consider shutting down some mining machines, reducing the load, and then looking for the cause of high liquid supply temperature alarm; The alarm value for high liquid supply temperature can be set according to the needs on the screen|

High supply pressure alarm

| 1: The filter is clogged| Cleaning the filter element|
2: The supply and return valve is faulty or not fully opened| Open the supply and return valve|
3: Pressure sensor failure| Replace the pressure sensor|
Low return pressure alarm| 1: The water tank is short of liquid| Refill the water tank|
2: Refill pump failure
3: Pressure sensor failure| Check the cause of the failure of refill pump
Replace the pressure sensor|
4: Leakage| Check the system for leaks|
Low supply flow alarm| 1: The supply and return valve is faulty or not fully opened| Open the supply and return valve|
2: The filter is dirty and blocked| Clean filter element|
3: Flow sensor failure| Replace the flow sensor|
4: Leakage| Check the system for leaks|
Condensation alarm| Environmental humidity is high| After on-site operation and maintenance checks the alarm information, it is only necessary to increase the target value of liquid supply temperature by 5°C to prevent condensation.| The logic set in the program is as follows: when the dew point temperature value> the supply temperature value -5℃, the system will prompt a condensation alarm.
Pressure fluctuations| 1: There is air in the system| Require on-site operation and maintenance personnel to open the exhaust valve to exhaust|
2: The system is short of fluid| If the return pressure is lower than the set value, the refill pump will automatically refill the system|
3: The sensor is damaged| Replace the sensor|
No pressure display| 1: The sensor is damaged| Replace the sensor|
2: The cable is loose| Check the wiring circuit of the pressure sensor and tighten it|
3: The PLC acquisition channel is damaged| Change the acquisition channel or change the PLC|
The pump is running but the| 1: There is air at the suction port of pump| Use a wrench to open exhaust port above the suction port of the water pump, wait until there is even liquid flowing out, and repeat 2-3 times|
flow is insufficient| | (refer to the maintenance manual for specific operations)|
---|---|---|---
2: The filter is clogged| Clean the filter element|
3: The system is short of liquid (low return pressure)| System rehydration|
Fan does not run| 1: Motor burns out| Replace the fan|
2: The cable is loose| In the case of electrification, use a multimeter to check the power supply of fan, and tighten it in the case of power failure|
3: Air switch tripped| Close the air switch|
Noise and abnormal sound| 1: Water pump cavitation| Detect the pressure on the suction side (return pressure or pressure gauge) and refill in time|
2: Pump shaft connection problem| Check the mechanical connection of the pump shaft|
3: Insufficient lubrication of motor shaft| Add lubricating oil|
4: Safety valve action| Check if there is too much liquid in the water tank to release the pressure in time, and drain the excess liquid in the water tank|
Water pump shaft seal leakage| | Replace the water pump shaft seal|

Maintenance of ANTSPACE HK3

Introduction
Preventive maintenance is to reduce the probability of product failure or prevent functional degradation, and is to be done according to the scheduled time interval or in accordance with the specified standards, mainly including adjustment, regular inspection and necessary repair. Through preventive maintenance, equipment maintenance technicians and operators can be familiar with the product performance, structures, principles, methods of use and precautions, so that the equipment can play its due function. Good maintenance ensures that the equipment is in good working condition.

Preventive maintenance
Monitored by operators
When using the equipment, operators should monitor its status to discover potential faults. Once the operator discovers the system has the fault alarm, he should carry on the fault confirmation and inspection quickly, and finds the fault cause.

Inspection during use of the equipment
When using the equipment, the operator shall conduct a qualitative check according to the plan to determine whether the product performs its specified functions.

• Check whether the liquid supply and return pipelines and power circuits are properly connected.
  Inspection requirements: all pipelines and connections shall be free of leakage and cables shall be free of damage;
  Inspection method: visual inspection;

• Check whether the liquid return pressure (back pressure) is low, and timely refill the coolant.
  Inspection requirements: the return pressure value is higher than 0.05Mpa (observe the main interface of the touch screen or 1# pressure gauge). If the pressure is lower than this value, it needs to be replenished.
  Inspection method: visual inspection and data comparison.

• Check the liquid supply system and record the temperature and pressure data every half day.
  Inspection requirements: record the data of liquid supply / return temperature, liquid supply / return pressure and liquid supply flow, and observe whether the data tends to be stable in long-term operation.
  Inspection method: visual inspection and data comparison.

• Check the fault alarm of the system, such as temperature, pressure, flow, etc. (the above fault state is displayed on the fault alarm screen of the touch screen), and record it every half day.
  Inspection requirements: check the system alarm points and conduct troubleshooting according to the instructions; Inspection method: visual inspection and as required.

Scheduled maintenance
Maintenance of Y filter
The system is divided into inner circulation and outer circulation. The inner circulation medium is coolant, and the outer circulation medium is tap water. The system has been set filtration of the internal and external circulation. When the system runs for a period of time, the filter needs to be cleaned.

There are three filters, and their corresponding cleaning time requirements are as follows:

1. Spray pump suction filter of cooling tower: the cleaning cycle is once a month.
2. Y-type filter of inner circulation in the liquid supply system of the pump: the cleaning cycle is once every six months(On Demand).
3. Y-type filter of inner circulation in the liquid replenishment system of the pump: the cleaning cycle is once a year. Cleaning method: wash it with water, rinse it and air dry it before use.

Replacement steps:

• Cut off the main power supply of the equipment;
• Locate and close the butterfly repair valve in the system shown in Figure 8-3-2, unscrew the plug on the filter end cover, and partially drain the pipeline;
• Locate the position of the Y-type filters in Figures 8-3-1 and 8-3-2.

Figure 8-3-1 Positions of the butterfly repair valve and the Y-type filter in the pipelines

• After finding the filter, unscrew the cap on the filter with an adjustable wrench.

Figure 7-3-2 View of filter

Figure 7-3-3 Schematic diagram of filter cap unscrewed

Figure 7-3-4 Schematic diagram of filter cap

• Remove the filter inside the filter for cleaning (or replacement)

Installation methods:

• Install the cleaned filter screen and tighten the filter cover with a wrench.
• Power up the equipment and charge coolant into the system.

Note: the gasket on filter cover should not be damaged.

Pipeline leakage maintenance
When the equipment runs for half a year, the pipe network should be checked for leakage. If leakage is found, the equipment should be stopped immediately for maintenance. During maintenance, the operation of the client load device should be stopped first, and then the unit should be stopped. After the completion of leak detection, the system shall be replenished.

Maintenance of electrical components
After the equipment runs for half a year, it is necessary to check and maintain the wiring terminals and crimping screws on the electrical components of the electric control box inside the water pump cabinet to prevent wiring terminals and crimping screws from loosening, resulting in poor contact and damage of components, and abnormal operation of the unit, thus affecting the work of the whole liquid cooling device.

System sewage discharge
After two years of operation of the system and the water tank, there may be some sundries in the system pipelines, so the sewage in the system should be discharged in a timely fashion.

Sewage discharge steps:

• Locate the position of NO.1-3 Ball Valve and NO.9 Ball Valve. (See Figure 8-3-5)

Figure 8-3-5 Filling/discharging valve for the pump station inside the container

• Connect the drain hose to No. 2 ball valve and No. 3 ball valve, tighten with a hose clamp; Lead the hose out of the unit and open No. 1-3 ball valve and No. 9 ball valve to drain the system.

Checking of the liquid level in the water tank
The system monitors the liquid levels in two water tanks (in the container and in the cooling tower). When the liquid level in the water tank is lower than the required value, a sound and light alarm on the touch screen of the system will go off to indicate the low water level in the water tank. In this case, the fault should be checked and the liquid should be replenished in a timely fashion. But even if the alarm does not go off for the tank level, the tank level should be checked regularly. The water tank level in the container must be checked once a week after stable operation. If the liquid in the water tank cannot reach 2/3 of the water tank, it is necessary to replenish liquid in a timely fashion. The water tank level of the cooling tower should be checked once a day, and shortage of water is not allowed, unless air cooling mode is adopted in winter, in which case the water inside the cooling tower needs to be emptied.

Figure 7-3-6 Water tanks in the container and in the cooling tower
Maintenance of coolant

1. As the core unit of ANTSPACE Liquid Cooling System, it is recommended to track and test the coolant regularly, at least once half year.
2. When purchasing coolant, pay attention to the relevant parameters in Table 8.3.1.
3. The coolant should be tested regularly with a focus on the pH value. It is not recommended to use the coolant when the pH value is lower than 7 (a pH indicator can be added to the coolant. When the pH value is lower than 6.8, the coolant will change color for easy observation). The detection methods are shown in the table below.
4. Freezing point, glycol ratio, total hardness, etc. should be tested. Pay attention to the content of aluminum, ferrum, copper and other elements. If the content of these elements increases, it means that contact corrosion has been produced. The detection methods are shown in the table below.
5. It is recommended to periodically add corrosion inhibitors to the antifreeze solution according to the requirements of the supplier.

Table 8-3-1 Recommended standards for testing coolant

Items| Physical and chemical indicators| Recommended reference standards for testing
---|---|---
Color| Significant color| Visual inspection
Appearance| No peculiar smell, no precipitation, no suspended matter| Visual inspection
Freezing point| -45℃ (low temperature)|
Boiling point| 108℃ (low temperature)|
PH value| 7-9|
Reserve alkalinity| ≥ 4 ml (Organic formula)
≥ 9 ml (Inorganic formula)|
Total hardness| < 120 mg/l|
Content of main elements| B| <20 mg/kg|
Si| <20 mg/kg
P| <20 mg/kg
Mo| <20 mg/kg
| Ca| <20 mg/kg|
---|---|---|---
Al3+| <50 mg/L
Fe2+| <50 mg/L
Cu2+| <50 mg/L

Note 1: Table 7-3-1 is for the working environment temperature is lower than 0 ℃ working conditions need to use the media requirements, if the working environment temperature is higher than 0 ℃ for a long time, you can use deionized water as the secondary side of the internal circulation medium, the corresponding media requirements are shown in Table 7-3-2.
Note 2: To ensure reliable long-term operation, the internal coolant needs to be replaced every 1 to 2 months when deionised/ or pure water is used as the internal circulation medium.

Table 7-3-2 Recommended standards for deionized water

Items| Deionized water| Reference standard|
---|---|---|---
PH| 8.5-9.5| Intel 632983|
Sulfide| <1 ppm| TC9.9/Intel 632983|
Sulfate| <10 ppm| TC9.9/Intel 632983|
Chloride| <5ppm| TC9.9/Intel 632983|
Bacteria| <100 CFUs/ml| TC9.9/Intel 632983|
Total Hardness (as CaCO3)| <20ppm| TC9.9/Intel 632983|
Conductivity| <20us/cm reference value）| TC9.9| High conductivity is not necessarily unacceptable, such as 1000US / cm, because corrosion inhibitors and fungicides will increase water conductivity. It is necessary to find out the reason for the sharp increase of conductivity trend during circuit operation.
Residual solids after evaporation| 50ppm| TC9.9/Intel 632983|
Turbidity| <20 NTU| TC9.9/Intel 632983|
Iron| 0.1ppm| Industry standard|
Copper| 10ppb| Industry standard|
Corrosion rate of carbon steel| 3mpy（0.075mm/a）| GB/T 50050-2017|
Corrosion rate of copper or stainless steel| 0.2mpy（0.005mm/a）| GB/T 50050-2017|

Maintenance of cooling tower
After the cooling tower is put into operation, it is necessary to regularly check the operation, and pay attention to the following points:

1. After the water enters the cooling tower, it must be strictly controlled. The damaged water pipes and nozzles shall be replaced in time to avoid affecting the water distribution effect or damaging the water spraying device. If there are sundries, they shall be removed in time;

2. The suspended solids content of spray water is generally controlled below 20mg / L. when the suspended solids content increases, water quality treatment agent shall be added appropriately for treatment. Scale inhibitor shall be added during long-term operation. See the following figure for water quality requirements (refer to GB / t-18430.1-2007). It is recommended to replace the spray water twice a year: Table 7-3-3 recommended standards for spray water
   Cooling water quality

   Items| Reference value| Inclination
   Corrosion| Scaling
   Benchmark term| PH value(25℃)| | 6.5～8.0| ⚪| ⚪
   Conductivity(25℃)| μS/cm| <800| ⚪| ⚪
   Cl-| mg(Cl-)/L| <200| ⚪|
   SO2-| mg(SO2-)/L| <200| ⚪|
   Acid consumption(pH=4.8)| mg(CaCO2)/L| <100| | ⚪
   Total hardness| mg(CaCO3)/L| <200| | ⚪
   Reference term| Fe| mg(Fe)/L| <1.0| ⚪|
   S2-| mg(S2-)/L| none| ⚪|
   NH+| mg(NH+)/L| <1.0| ⚪|
   SiO2| mg(SiO2)/L| <50| | ⚪
   Note: ⚪ Indicate factors related to corrosion or scaling tendency

3. If any abnormality is found in the fan system, it shall be shut down immediately for inspection and troubleshooting. The blades shall be repaired or replaced according to the actual scouring and wear, so as to ensure that the cooling tower is in good operation condition;
4. If excessive water loss is found during the use of the cooling tower, the manual replenishment device shall be used to replenish water in time. In addition, check whether the water collector is damaged and whether the water collecting tank is leaking;
5. It is required to clean the inside and outside of the tower once a year to prevent the accumulation of dirt from affecting the smooth inflow of water.;
6. After the cooling tower is shut down, the residual water in the sump and pipeline must be vented. If the shutdown time is long, the whole tower shall be inspected to ensure safe and normal operation next time;
7. Fillers, water collectors and other inflammables are strictly prohibited from contacting with open fire during use or maintenance;
8. Under the freezing point temperature in winter, the system will switch to the dry cooling mode. At this time, it is necessary to drain the residual water in the sump and pipeline to prevent equipment damage caused by icing;
9. The filter inside the sump needs to be cleaned once a month to prevent damage to the spray pump caused by dirty blockage;
10. PVC filler shall be flushed regularly and shall not operate when the cooling water temperature is higher than 50 ℃.

Safety instructions of ANTSPACE HK3

If ANTSPACE Liquid Cooling System is not used for a long time, the main power supply should be turned off.
This will prevent accidents from happening.

Maintenance:
Only qualified and authorized personnel are allowed to perform maintenance and other operations on electrical system;

Operation:

1. ANTSPACE liquid cooling system in container shall be equipped with fire extinguisher before starting operation;
2. The equipment must be properly grounded; after electric connection, the protective earthing resistance shall be verified to guarantee continuity, it shall be less than 0.3Ω, otherwise, personal injury or death may occur;
3. Only after stopping the equipment and turning off the power supply can the equipment be cleaned, otherwise electric shock or injury may occur. Do not clean the unit with water, otherwise electric shock may occur.
4. Be sure to check whether the valve (if there is a valve) is open before starting the system;
5. Safety operation of PDC and electric control cabinet:

During the operation of PDC A, B and control cabinet, it shall be ensure that the cabinet door is in a locked state to prevent personal injury such as electric shock, while avoiding salt, moisture, dust or other conductive substances in the air from entering the interior of the cabinet. If power-on, it is prohibited to contact the cabinet internal single board, cables, terminals, modules, inductors and other devices to prevent safety accidents. If malfunctions occured, abnormal smell and sound, please power off main circuit breakers MCB-A1, MCB-A2 and MCB17 of three electrical cabinets. Or press the emergency stop button on the door of container, and two electrical cabinets. Otherwise it may lead to electric shock or fire accident.

Note:

1. Non-professional authorized persons are forbidden to open the door of the electrical cabinets.
2. The electrical cabinets door only can be opened when the main circuit breakers are located on the OFF position.

Please read this instruction carefully before using this equipment. If you have any difficulties or problems, please contact the manufacturer for help.

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