## Testing an Evaporative Cooler Water Dispenser
### Introduction
Evaporative coolers, also known as swamp coolers, are effective and economical devices for cooling indoor spaces in dry climates. They work by evaporating water into the surrounding air, which creates a cooling effect. To ensure optimal performance, it’s crucial to regularly test and maintain the water dispenser, which supplies water to the evaporative pads.
### Materials Required
– Clean bucket or container
– Measuring cup or ruler
– Stopwatch
– Thermometer (optional)
### Step-by-Step Testing Procedure
#### 1. Timed Water Output
a. Fill the Bucket:
– Place an empty bucket or container under the water dispenser.
b. Open the Water Supply:
– Turn on the water supply to the evaporative cooler.
c. Measure the Time:
– Start the stopwatch simultaneously with opening the water supply.
d. Fill the Bucket:
– Allow water to flow into the bucket until it reaches a pre-determined level (e.g., 1 gallon).
e. Stop the Stopwatch:
– Once the desired water level is reached, stop the stopwatch.
Formula for Water Output:
“`
Water Output = Volume of Water (gallons) / Time Taken (minutes)
“`
#### 2. Water Flow Rate
a. Adjust the Float Valve:
– Locate the float valve in the water dispenser. Adjust it to ensure it’s properly positioned and moving freely.
b. Open the Water Supply:
– Turn on the water supply to the cooler.
c. Observe the Water Flow:
– Check if water is flowing into the evaporative pads at a steady and sufficient rate. Note any hesitation or blockage.
d. Reset the Float Valve (if Adjusted):
– If you adjusted the float valve, reset it to its original position after testing.
#### 3. Water Distribution
a. Remove the Top Cover:
– Remove the top cover of the evaporative cooler to access the evaporative pads.
b. Check Water Distribution:
– Turn on the water supply and observe how water is distributed across the evaporative pads. Look for any uneven distribution or dry spots.
c. Adjust Water Flow:
– If necessary, adjust the water flow to ensure even distribution across all pads. This may involve tweaking the water supply valve or adjusting the float valve.
#### 4. Water Quality (Optional)
a. Collect Water Sample:
– Collect a small sample of water from the water dispenser into a clean glass or container.
b. Check for Hardness:
– Use a water hardness test kit to check the water’s mineral content. High mineral content can cause scale buildup in the water dispenser.
c. Adjust pH (Optional):
– If necessary, adjust the pH of the water using pH adjuster tablets. Evaporative coolers perform best in slightly alkaline water (pH 7-8).
#### 5. Troubleshooting Common Issues
a. No Water Flow:
– Check if the water supply is turned on.
– Inspect the water line for kinks or blockages.
– Clean the float valve and ensure it’s moving freely.
b. Insufficient Water Flow:
– Adjust the water supply valve to increase flow rate.
– Clean the water dispenser to remove any scale or mineral buildup.
c. Uneven Water Distribution:
– Adjust the water flow rate to ensure even distribution across all pads.
– Check for any obstructions or blockages in the water distribution network.
### Maintenance Tips
– Clean the water dispenser regularly to prevent scale buildup.
– Replace evaporative pads when they become clogged or damaged.
– Inspect and clean the water supply line periodically.
– Ensure the float valve is properly adjusted and moving freely.
– For hard water areas, consider using a water softener to reduce mineral buildup.
### Conclusion
Regular testing and maintenance of the water dispenser are essential for the optimal performance of an evaporative cooler. By following these steps, you can ensure that water is flowing at the correct rate, distributed evenly, and free of impurities. This will help maximize cooling efficiency and extend the life of your evaporative cooler.