Technical Documentation: Precautions for the Use and Maintenance of Circulating Water Cooling Towers

I. Installation requirements for square cooling towers 1. Requirements for a proper installation environment: Under normal circumstances, the location where the cooling tower is installed should be far away from buildings, and both the air intake side and the exhaust outlet of the air ducts must be unobstructed； 2. Requirements for checking the foundation before installation: Check whether the foundation is level, and ensure that all embedded components match those specified in the drawings. The horizontal deviation of each foundation surface shall not exceed ±5mm, while the positional accuracy error shall not exceed ±10mm. In particular, it is important to verify whether the height of the foundations is correct when cooling towers of different models are placed together, as well as whether horizontal connection pipes need to be installed ； 3. Installation requirements for the lower frame iron components: For these iron components (including those of type B and type A), their surfaces must be level; any twisting or tilting is not allowed. The deformation error of these components shall not exceed ±2.5 mm/m. If the foundation is not level, it must be adjusted to be level before proceeding ； The overall error of the iron components must not exceed ±10MM, and the installation of the sink base can only be carried out after the iron components of the lower frame have been installed and adjusted (see RTN-175 for the installation diagram of the lower frame) ； 4. Requirements for installing the collection basin: The collection basin should be installed properly using the pre-assembled lower frame components. It should first be aligned and positioned on top of these components, so that after installation it forms a regular rectangle. The four sides of the collection basin should be symmetrical with respect to the metal components. When multiple cooling towers are combined, the collection basin of the middle tower should be placed first, followed by those at the ends; the basins at the ends should be positioned based on those already in place in the middle. It is essential that the edges of the collection basins in all connected square cooling towers form a straight line at each junction between towers. At the connection points in the middle, efforts should be made to keep them straight as well. In cases where there are conflicts due to deformation and installation becomes impossible, it may be necessary to use a cutting tool to make the necessary adjustments. The screws used to connect the collection basins together can be installed as appropriate (mainly to prevent leaks). Ultimately, the collection basins should be secured to the water tank using screws, with additional measures taken to ensure no leaks occur. Strive to achieve an attractive appearance without compromising the performance of the cooling tower ； 5. Installation requirements for pillars: The pillars (identified as C on the drawings) must be perpendicular to the base surface; the deviation from perpendicularity shall not exceed ±1.5 mm/m. In addition, a leak-proof gasket must be installed at each point where a pillar connects to the collection basin ； After the cooling tower is installed, measures are taken to prevent leaks, so that even when water level exceeds the end face of the columns, there will be no dripping or leakage (for the specific installation location, see the installation diagram in RTN-175) ； 6. Installation requirements for the upper shell: For square cooling towers, the installation of the upper frame components must follow the same requirements as those for the lower frame. After the upper frame is installed, tension hooks are used to adjust the tension rods so that the vertical columns are perpendicular to the lower frame. Only after the columns have been properly adjusted can the screws connecting them be tightened. It is not until the upper frame components are fully installed that components such as panels, sprinkler trays, air ducts, noise reduction devices, fans, reducers, and motors can be installed. When installing the sprinkler tray, it is necessary to first check the arrangement of the sprinkler holes. After installation, the side of the sprinkler tray that is farthest from the steps should be on the outside of the cooling tower. Once the air ducts are assembled, they should be as circular as possible (with the lower edge of the air ducts pressing against the side of the sprinkler tray that is close to them). The deviation between the fan blades and the inner wall of the air ducts should not exceed ±2 mm. The number of screws connecting to the upper frame must be sufficient; there should be no missing screws, nor should any washers be omitted. All screws must be tightened properly. All parts with corners should be secured using corner brackets (for panels and louvered sections, screws in a plane perpendicular to the ground can be installed as appropriate). When installing panels, especially when the seams of fiber-based materials are not on the steel structural elements, it is sufficient to install one screw every 500–600 millimeters (the number of screws used to secure panels to the metal frames can be adjusted as needed; generally, this does not affect the performance of the cooling tower) ； 7. Requirements for filler installation: When installing the filler in square cooling towers, it should be placed in alternating directions so that the diagonal strips at the water collection points form diagonal columns; it is not allowed for diagonal strips in the same direction to overlap. The filler should be installed with appropriate tension – there should be no gaps after installation, nor should the natural air flow channels of the filler be deformed (i.e., 59–60 pieces per meter). Additionally, the diagonal strips on both sides of the filler layer closest to the water spray basin must function effectively in collecting water (i.e., these diagonal strips must be located outside the sides of the water spray holes). The water barriers and wind shields installed on either side of the water spray basin should make contact with the upper surface of the filler. For fillers with a flow rate of 200 m3/h or less, whether used individually or as part of a combined unit, they should be arranged in a straight line from top to bottom. For fillers with a flow rate greater than 200 m3/h, an appropriate inclination should be applied during installation, meaning there should be a displacement of 20–30 millimeters between layers (with a gradual convergence toward the center of the tower when viewed from above). Between the columns of combined units, the filler should be installed with relatively small gaps to prevent air leakage ； 8. Installation requirements for the power system: Before installing the motor frame in the power system, it is necessary to first check whether the duct is as circular as possible; the diameter error of the duct at any point must not exceed ±5 mm. The center of the fan, which is also the center of the connector, should be adjusted to coincide with the center of the duct’s circle ； After installation, the driving wheel and the driven wheel should be on the same horizontal level, with the horizontal deviation of the belt not exceeding ±2 mm ； After installation, the spacing of the fan blades should be checked to be equal, using a point on the motor frame as a reference. The deviation between the tips of the fan blades and the inner wall of the duct must not exceed ±5 mm. For all screws that connect to the upper frame, the screws that secure the duct, as well as those related to the motor frame and the motor itself – in other words, all components related to the power supply or to the structural supports – the number of screws and washers must be sufficient, and all of them must be tightened properly ； The drive belt should be of appropriate tension, with about 10 millimeters of movement per meter when pressed by hand ； Each motor protection cover should be installed firmly, ensuring that no noise is generated due to vibration of the protection cover and the motor frame when the machine is started ； 9. Labeling requirements: The labels should be as aesthetically pleasing as possible; for units with a capacity of 200 tons or less, or for combinations of such units, the spacing between the two characters on the label should be approximately 1600 millimeters ； 250 tons of monomer, or approximately 2400 millimeters between the two components making up the combination ； For monomers over 400 tons or their combinations, the spacing between the two components is approximately 2600–2900 millimeters ； For monomers or combined units with a flow rate of 250 M3/H or less, the font size is 1500 millimeters; for those with a flow rate above 250 M3/H, the font size is 2200 millimeters ； 10. Connection requirements: All cable sections must be checked to ensure they are securely installed before connection. The automatic water replenishment device must be vertical with respect to the water surface. The lowest point of the water inlet pipe should be approximately 10 millimeters lower than the level of the step where the upright post is installed in the water collection basin. All external connections must be made properly, so as to prevent the installed cable sections from rotating. When installing external pipes, it is necessary to follow the structure of the previously installed cable sections; excessive force or imbalance in the pipes must not cause damage or deformation to the ABS cable sections or other cable sections ； 11. General requirements for structure and screws: All steel structural components that are prone to deformation during transportation must be straightened; all screws (especially those used for connections) must be tightened, and washers must be installed ； 12. Other requirements: 1) During the handling and installation of the cooling tower, care must be taken to protect the surface of the fiberglass components; they must not come into direct contact with hard objects to avoid scratching the surface ； Other accessories also need to be handled with care; it is strictly forbidden to throw them around and cause damage ； 2) All leak-proof fibers, as well as glue, catalysts, motors, fans, fillers, etc., should be stored in a cool and well-ventilated place; exposure to moisture, sunlight, or fire must be strictly avoided ； 3) When installing the cooling tower, it is strictly prohibited to use open-flame operations such as welding or gas cutting on the tower itself or in its vicinity ； 4) All engineering installation personnel must strictly abide by the discipline of on-site construction management ； 5) After the project is completed, a thorough inspection should be carried out once again; any issues found must be addressed until no problems remain. Finally, the site should be cleaned up and an application for acceptance submitted ； II. Operation and Maintenance Manual for RTN Series Products I. Preparations before startup 1. Are all screws of the cooling tower tightened? ； 2. Are there any debris in the collection basin, watering basin, water separation mesh, air intake louver, heat dissipation film, and inlet/outlet pipes? ； 3. Are the fan and sprinkler system operating smoothly? ； 4. Is the power supply compatible with the motor? ； 5. Is the transmission assembly installed correctly (water flow direction)? ； 6. Is there an appropriate amount of lubricating oil in the reducer? ； 7. Open the float-based water supply valve to fill the collection basin and throat completely until the float stops the flow ； And the cut-off water level is about 15 MM below the full pipe level ； 8. Remove all obstacles from the air inlet and outlet positions ； 9. Check whether the water collection basin is leaking ； II. Startup Inspection 1. Does the fan rotate clockwise with the air flow moving from bottom to top? ； 2. Start the water pump to completely remove the air from the circulation pipe ； 3. Standard operating water volume for the water tower calibration ； 4. Is the water replenishment for the float ball working properly? III. Operational inspections 5. Keep the tower clean to prevent the formation of dirt and algae, and carry out regular water quality treatment. 6. After approximately 40 hours of operation, the belt tension must be checked again to ensure it is normal. 7. Check whether there is oil leakage in the gear reducer, and the lubricating oil must be replaced after approximately 80 hours of operation. 8. Is the water distribution even and stable? ； IV. Inspection and Cleaning 1. Shell Body: The fiberglass shell body does not require external painting; it can be made shiny again by simply cleaning it with water and detergent. For the 2 basins, first turn off the water supply valve, then open the drain to release all the excess water from the basins, after which the dirt on them can be cleaned with a brush. 3. For heat dissipation fins, proper water treatment and regular cleaning of the water basin and sprinkling system are necessary to prevent dirt or sediment in the water from clogging the fins. V. Testing and Adjustment 1. After installing the belt reducer, motor, and fan connector, use a long straight edge to check whether the belt pulleys of these components are in line with each other. The closer the motor is to the fan connector, the looser the belt will be, which facilitates installation and removal. Once the belt is in place, adjust the adjustment screws to increase the distance between the motor and the fan connector; this will cause the belt to tighten automatically. Then, manually check whether the tension of the belt is appropriate, and if necessary, tighten the adjustment screws before securing them in place. One to two days after the new belt is put into use, its tension should be checked and adjusted again; the belt must be replaced in its entirety, and it is never acceptable to use both new and old belts together. VI. Faults and Countermeasures
Fault Causes | Countermeasures
(1) Rising water temperature
1. Excessive circulation water volume
2. Insufficient cooling air volume
3. Air circulation loop in cooling system
4. Clogged sprinkling system
5. Blocked cooling fins
6. Loose drive belt
7. Obstruction at the air inlet
8. Uneven sprinkling
Adjust to standard water volume
Increase fan blade angle/raise fan speed
Improve ventilation
Clean the sprinkling basin
Clean or replace it
Adjust or replace the belt
Improve ventilation
Adjust the water inlet mechanism

(2) Abnormal circulation water
1. Air trapped in the circulation pump
2. Incorrect selection of circulation pump
3. Clogged inlet and outlet pipes
Open the exhaust valve to release trapped air
Replace the pump with one having appropriate flow rate
Clean the pipes

(3) Water splashing
1. Excessive circulation water volume
2. Excessive cooling air volume
3. Damaged surface layer of cooling fins
4. Loose water baffle
Adjust to standard water volume
Reduce fan blade angle
Replace with new cooling fins
Strengthen the water baffle

(4) Noise
1. Fan blades hitting the casing
2. Damaged motor bearings
3. Damaged fan connector bearings
4. Loose screws
5. Excessive cooling air volume
6. Excessive circulation water volume
Adjust the motor support frame or casing
Replace bearings
Replace bearings
Tighten loose screws
Reduce fan blade angle
Reduce to standard water volume/or take noise reduction measures

(5) Vibration
1. Asymmetric fan blade angles
2. Loose screws
3. Damaged fan
4. Damaged motor
Adjust fan blade angles
Tighten loose screws
Replace the cooling fan
Replace the motor

(6) Excessive water replenishment
1. Damaged float valve
2. Water supply level higher than the full water pipe
3. Leakage in the basin
4. Leakage in the circulation pipes
5. Water splashing
Replace the float valve
Adjust carefully
Re-perform leak repairs
Repair
Adjust air volume and packing gap

(7) Excessive current
1. Drop in supply voltage
2. Excessive cooling air volume
3. Damaged motor bearings
4. Damaged fan connector bearings
5. Unbalanced pulley
6. Blocked cooling fins
7. Obstruction at the air inlet
8. Damaged motor
Check the supply voltage
Adjust fan blade angle
Replace bearings
Replace bearings
Repair or replace
Clean or replace
Improve ventilation
Replace the motor

(8) Basin leakage
1. Improper sealing of gaps
2. Bursting of inlet and outlet connectors
3. Excessively high water replenishment level
Re-treat it
Replace inlet and outlet connectors
Readjust the water stop angle of the float linkage

VII. Recommended Inspection and Maintenance Procedures
Fan, Motor, Reducer, Fins, Water Collection Basin, Sprinkling Basin, Steel Structure Casing, Float, Water Level, Bearings, Valves, Air Inlet
1. Check for obstructions W W W
2. Noise and vibration D D D Y D
3. Fasteners S S S
4. Lubricating oil Q
5. Lubricating oil level R
6. Oil contamination Q
7. Replace lubricating oil S
8. Water level and quality D
9. Water volume M
10. Check for leaks S S S
11. Comprehensive inspection Y Y S Y Y S S
12. Tightening S S Y
13. Cleaning R S R S R R W
14. Painting R R
15. Start/stop S S
Note: D – Daily, W – Weekly, M – Monthly, Q – Quarterly, S – Every 6 months, Y – Annually, R – Random time

I. Installation requirements for circular cooling towers 1. Requirements for a proper installation environment: Under normal circumstances, the location where the cooling tower is installed should be far away from buildings, with unobstructed air intake and exhaust； 2. Requirements for checking the foundation before installation: Before installation, it is necessary to check whether the foundation is level, whether all embedded components match those specified in the drawings, that the horizontal deviation of each foundation surface does not exceed ±5 MM and the positional accuracy deviation does not exceed ±10 MM. It is also important to determine whether there is a central pier; when cooling towers of different models are placed together, it may be necessary to install horizontal connection pipes, and the height of the foundation must be correct as well. 3. Requirements for the installation of the bottom frame iron components: The surface of these iron components must be level; any twisting or tilting is not allowed. The various pillars should be symmetrically arranged on their respective pedestals. The deformation error of these iron components must not exceed ±3.5 mm/m. If the components become deformed due to transportation or other reasons, they must be adjusted before installation. If the foundation surface is not level, it should be leveled first (by using shims) ； The overall error of the iron components must not exceed ±10MM; the installation of the sink base can only proceed after the iron components of the frame have been properly installed and adjusted ； 4. Requirements for installing the water collection basin: The installation of the water collection basin should be carried out using the pre-assembled frame components. For circular cooling tower water collection basins, the screws should be tightened in several stages; it is strictly prohibited to tighten all screws at each joint at once. The final result should be that the gap between each joint is uniform after the screws have been tightened ； In areas where there are conflicts due to local fiber components, if installation is not possible due to deformation, it is necessary to use a cutting machine to make the required adjustments in order to achieve an aesthetically pleasing appearance. If the joints between the components are too thick as a result of improper manufacturing, partial grinding should be carried out to bring the adjacent components as close together as possible. Before implementing leak-proofing measures, it is essential to secure the water tank to the collection basin using screws. Finally, when creating leak-proof fiber materials, any rough edges must be removed. Additionally, no resin buildup is allowed on the outside of the entire tower, especially at the edges ； 5. Installation requirements for pillars: The pillars must be perpendicular to the base surface; the deviation from perpendicularity shall not exceed ±5 mm/m. In addition, a leak-proof gasket must be installed at the point where each pillar connects to the collection basin ； They are required to be evenly distributed along the edges of the water collection basin, and leak prevention measures should be taken at each pillar base once the entire tower is installed ； And ultimately, there must be no dripping or leakage ； 6. Installation requirements for the upper shell: For circular cooling towers, it is necessary to tighten the screws of the shell in several stages; otherwise, the tower may become tilted or uneven after installation (this should be done in the same way as when tightening the screws of the collection basin) ； Only after the upper shell has been installed can components such as the air ducts, fans, reducers, motors, and noise-reducing ducts be installed. In particular, once the air ducts are assembled, they should be as circular as possible; the error between the tips of the fan blades and the inner wall of the air ducts must not exceed ±2 mm. It is strictly prohibited to leave any screws connecting to the upper shell uninstalled, or to fail to use washers with those screws, and all screws must be tightened thoroughly ； 7. Installation requirements for packing, center tube, turntable, and water distribution pipes: When installing the packing in a circular cooling tower, there should be no large gaps between the packing pieces; the joints between layers should be offset from each other, and the water flow patterns between the packing layers should be in a zigzag pattern ； The surface of the filler must not be stepped on directly. If manual operations need to be performed on the filler due to the installation or adjustment of the fan, the number of people working on it should be minimized as much as possible. Additionally, large flat plates should be placed on the filler in advance to ensure smooth airflow from its outlet. After installation, no residues or other substances should block the air outlets on the filler surface ； The center pipe should be installed as vertically as possible with respect to the ground. After installation, the threads of the center pipe should be exposed above the packing. Once the rotating head and the sprinkler pipe are installed, the lower end of the sprinkler pipe must not rub against the packing; the sprinkler pipe should be horizontal, and the height of the tower can be adjusted using tension rods ； The water-proof sleeves must be such that the sprinkling holes are parallel to them when inclined downward at a 45° angle; during operation, the sprinkling pipes must function smoothly, without any tilting or loosening, and friction between the components is absolutely not allowed ； 8. Installation requirements for the power system: Before installing the motor frame, it is necessary to check that the air inlets are as circular as possible; the diameter error of any air inlet measured must not exceed ±5 mm. The center of the fan, which is also the center of the connector, should be adjusted to coincide with the center of the circular shape of the air duct ； The installed driving wheel and driven wheel should be on the same horizontal level; the horizontal deviation of the belt must not exceed ±2 mm. If this limit is exceeded, shims should be used to compensate for it ； The final fan blades should have equal spacing as measured from a certain point on the motor frame; the deviation between the blade tips and the inner wall of the duct must not exceed ±2.5 mm. For all screws related to the power components, such as those connecting to the upper frame, the ducts, the motor frame, and the motor, as well as those related to the structural load-bearing elements, the number of screws and washers must be sufficient, and all of them must be tightened properly ； The drive belt should be of appropriate tension, with a movement range of about 10 millimeters per meter when pressed by hand (this can be adjusted using the adjustment screw) ； Each motor protection cover should be installed firmly, ensuring that no noise is generated due to vibration of the protection cover and the motor frame when the machine is started ； 9. Requirements for labeling: The labels should be as aesthetically pleasing as possible, with straight lines and proper spacing; any excess material must be removed. Bubbles or uneven surfaces are not allowed at all, and the labels should be placed in a direction on the outside of the building where they can be easily seen ； 10. Connection requirements: All cable sections must be checked to ensure they are properly installed before making connections. The automatic water replenishment device must be vertical with respect to the water surface; by adjusting the screw of the float valve, the float should be set so that the water level is about 15 millimeters lower than the plane where the mounting posts of the water collection basin are located. This height corresponds to the level of the full water pipe (the height within the elbow can be used for adjustment). Appropriate force should be applied when connecting all external pipes, so as to prevent the already installed cable sections from rotating. When installing external pipes, the previously installed cable sections should be taken as a reference; excessive force or imbalance in the pipes must not cause damage or deformation to the ABS cable sections or other cable sections. **When installing, it is essential to ensure that the holes are vertical ； 11. General requirements for steel structures and screws: All steel structural components that are prone to deformation during transportation must be corrected; all screws (especially those used for connections) must be tightened, and washers must be installed ； 12. Other requirements: 1) During the handling and installation of the cooling tower, care must be taken to protect the surface of the fiberglass components; they must not come into direct contact with hard objects to avoid scratching the surface ； Other accessories also need to be handled with care; it is strictly forbidden to throw them around and cause damage ； 2) All leak-proof fibers, as well as glue, catalysts, motors, fans, fillers, etc., should be stored in a cool and well-ventilated place; exposure to moisture, sunlight, or fire must be strictly avoided ； 3) When installing the cooling tower, it is strictly prohibited to use open-flame operations such as welding or gas cutting on the tower itself or in its vicinity; if such devices must be used, proper fire prevention measures must be taken ； 4) All engineering installation personnel must strictly abide by the discipline of on-site construction management ； 5) A thorough inspection must be carried out once again after the project is completed, and any issues found must be resolved until nothing remains problematic. II. CTN Series Product Operation and Maintenance Manual I. Preparations before startup 1. Are all screws of the cooling tower tightened? ； 2. Are there any debris in the collection basin, water separation mesh, air intake mesh, heat dissipation film, and inlet/outlet pipes? ； 3. Are the fan and sprinkler system operating smoothly? ； 4. Is the power supply compatible with the motor? ； 5. Is the transmission assembly installed correctly? ； 6. Is there an appropriate amount of lubricating oil in the gear reduction box/reducer? ； 7. Open the float ball water supply valve to fill the collection basin and pipes completely until the float ball stops the flow ； And the cut-off water level is about 15 MM below the full pipe level ； 8. Remove all obstacles from the air inlet and outlet positions ； 9. Check whether the water collection basin is leaking ； II. Startup Inspection 1. Does the fan rotate clockwise with the air flow moving from bottom to top? ； 2. Start the water pump to completely remove the air from the circulation pipe ； 3. Adjust the water tower to the standard operating water volume ； 4. Is the water replenishment amount for the ball normal? III. Operational inspections 1. Keep the tower clean to prevent the formation of dirt and algae, and carry out regular water quality treatment. 2. After operating for about 40 hours, the belt tension must be checked again to ensure it is normal. 3. Check whether there is oil leakage in the gear reducer/ or gearbox, and whether there is sufficient lubricating oil available. 4. Is it uniform and stable? ； IV. Inspection and Cleaning 1. Shell 4. The fiberglass shell does not require external painting; it can be made shiny again by simply cleaning it with water and detergent. 2. Sink 5. First, close the water supply valve and open the drain to release all the remaining water from the sink, after which the dirt on the sink can be cleaned with a brush. 3. Cooling fins 6. Proper water treatment and regular cleaning of the water basin and sprinkling system are necessary to prevent dirt or sediment in the water from clogging the fins. V. Testing and Adjustment 1. After installing the belt drive, motor, and fan connector, first check whether the belt pulleys of these components are in line with each other. The closer the motor is to the fan connector, the looser the belt will be, which facilitates installation and removal. Once the belt is in place, adjust the adjustment screws to increase the distance between the motor and the fan connector; this will cause the belt to tighten automatically. Then, manually check whether the tension of the belt is appropriate, and adjust the setting screws to fix it in place. One to two days after the new belt is put into use, its tension should be checked and adjusted again; the belt must be replaced in its entirety, and it is never acceptable to use both new and old belts together. VI. Faults and Countermeasures
Fault Causes and Solutions

(A) Rising water temperature
1. Excessive circulation water volume
2. Insufficient cooling air volume
3. Loop in the cooling air flow
4. Clogging of the sprinkling system
5. Blockage of the cooling fins
6. Looseness of the drive belt
7. Obstructions at the air inlet
8. Uneven sprinkling
Solution: Adjust to the standard water volume; increase the fan blade angle; improve ventilation; clean the sprinkling basin; clean or replace it; adjust or replace the belt; improve ventilation; adjust the water inlet mechanism.

(B) Abnormal circulation water
1. Air accumulation in the circulation pump
2. Incorrect selection of the circulation pump
3. Clogging of the inlet and outlet pipes
Solution: Open the vent valve to release air; replace the pump with one that provides an appropriate flow rate; clean the pipes.

(C) Water splashing
1. Excessive circulation water volume
2. Excessive cooling air volume
3. Damage to the surface of the cooling fins
Solution: Adjust to the standard water volume or adjust the water-blocking sleeve; adjust the fan blade angle; replace the cooling fins.

(D) Noise
1. Fan blades hitting the casing
2. Damaged motor bearings
3. Damaged bearings in the fan connector
4. Loose screws
5. Excessive cooling air volume
6. Excessive circulation water volume
Solution: Adjust the motor support frame or the casing; replace the bearings; tighten loose screws; adjust the fan blade angle; adjust to the standard water volume.

(E) Vibration
1. Asymmetric fan blade angles
2. Loose screws
3. Damaged fan
4. Damaged motor
Solution: Adjust the fan blade angles; tighten loose screws; replace the cooling fan; replace the motor.

(F) Excessive water replenishment
1. Damaged float valve
2. Water supply level higher than the full-water mark
3. Leakage from the water basin
4. Leakage in the circulation pipes
5. Water splashing
Solution: Replace the float valve; carefully adjust it; repair any leaks; adjust the air volume and packing gap.

(G) Excessive current
1. Drop in supply voltage
2. Excessive cooling air volume
3. Damaged motor bearings
4. Damaged bearings in the fan connector
5. Unbalanced belt pulley
6. Blockage of the cooling fins
7. Obstructions at the air inlet
8. Damaged motor
Solution: Check the supply voltage; adjust the fan blade angle; replace the bearings; repair or replace them; clean or replace components; improve ventilation; replace the motor.

(H) Leakage from the water basin
1. Inadequate sealing at gaps
2. Bursting of the inlet and outlet connectors
3. Excessively high water replenishment level
Solution: Re-seal the gaps; replace the inlet and outlet connectors; readjust the angle of the float linkage to prevent leakage.

VII. Recommended Inspection and Maintenance Procedures
Fan, Motor, Connector, Fins, Water Collection Basin, Sprinkling Basin, Steel Structure Casing, Float, Water Level, Bearings, Valve, Air Inlet
1. Check for obstructions – WWW
2. Noise and vibration – DDD YD
3. Fasteners – SSS
4. Lubricant – Q
5. Lubricant level – R
6. Lubricant contamination – Q
7. Replace lubricant – S
8. Water level and quality – D
9. Water volume – M
10. Check for leaks – SSS
11. Comprehensive inspection – YYSYYS
12. Tighten – SSY
13. Clean – RSRSRRW
14. Paint – RR
15. Start/Stop – SS
Notes: D – Daily, W – Weekly, M – Monthly, Q – Quarterly, S – Every 6 months, Y – Annually, R – At random time