Pressuring a boiler expansion tank involves adjusting the air pressure on the air-filled side to the correct value, typically between 1 and 1.2 bar. Here's a step-by-step guide:
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Locate the Air Valve: Find the valve cover on the side of the expansion tank designated for air filling.
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Remove the Valve Cover: Unscrew and remove the valve cover to access the air valve (similar to a tire valve).
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Measure the Air Pressure: Using a pressure gauge, measure the existing air pressure within the tank.
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Adjust the Pressure (If Needed):
- Increase Pressure: If the pressure is lower than the required value (1-1.2 bar), use an air pump to add air until the gauge reads the correct pressure.
- Decrease Pressure: If the pressure is too high, depress the valve core briefly to release air until the gauge reads the correct pressure.
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Replace the Valve Cover: Once the pressure is within the desired range (1-1.2 bar), screw the valve cover back onto the air valve.
| Step | Description |
|---|---|
| 1 | Locate and uncover the air valve. |
| 2 | Measure the existing air pressure. |
| 3 | Add or release air to reach 1-1.2 bar. |
| 4 | Replace the valve cover. |
This procedure ensures that the expansion tank maintains the proper air cushion to accommodate water expansion during boiler operation.
