The Grundfos UPS2 pump is designed to keep your heating system running smoothly. However, air can become trapped occasionally. While this isn't often a major cause for concern, it can result in poor performance and issues with your boiler. Bleeding the pump helps remove this air, and ensures the pump can perform at its optimal.
FAQs
Can I bleed the pump myself?
We would always recommend seeking professional assistance when it comes to plumbing or electrical work. However, bleeding a boiler pump shouldn't be too tricky for most, especially if you are DIY savvy. Please proceed with caution and only attempt this if you feel confident and have the necessary tools.
Safety Precautions
Before you start, it’s important to follow these safety tips:
• Turn off the heating system and pump to avoid electric shock.
• Turn off the water at the mains supply (stop tap) to prevent leaks and pressure changes. This valve is usually located under your sink.
• Allow time for the pump to cool down if it’s recently been running.
Tools You’ll Need:
• Slotted screwdriver (for the bleed screw)
• Small container or cloth (to catch any water)
Do I need to Bleed My Boiler Pump?
While bleeding the pump unnecessarily is unlikely to do any harm, it's still wise to identify whether or not trapped air is the cause of your problem. If your boiler is:
• Making a knocking or banging sound when running
• Failing to add pressure back into the system
• Over heating and shutting down
Note: some noise when running is normal. A quiet hum is fine and usually a sign that things are running smoothly.
How To Bleed the Grundfos UPS2 Pump - Step by Step
Step 1: Locate the Bleed Screw
Find the bleed screw on the Grundfos UPS2 pump. Typically located in the centre of the pump and uncovered. This screw allows trapped air to escape. Ensure you have clear access to it.
Step 2: Bleed the Pump
Follow these steps to release the air:
• Loosen the bleed screw carefully with the screwdriver.
• Listen as air starts to escape. You might hear a hissing sound. Continue until a very small amount of water begins to flow.
• Once water is flowing, tighten the bleed screw securely to prevent leaks.
• Use a cloth or container to catch the water that comes out with the air.
Step 3: Check the System
After bleeding the pump, it’s time to test your heating system:
• Turn the heating system back on.
• Listen for any unusual sounds. A quiet pump usually means the air has been successfully removed.
• Bleed the pump again if noises persist. You may hear knocking or banging sounds after the system has been running. This is a sign that not all the air has been removed or that air pockets in other parts of the system have travelled to the pump and become trapped.
Troubleshooting Tips
If the pump continues to make noise, it could be excessive air in the system. To resolve this issue, try bleeding the radiators also. If problems persist, it is advisable to call in a professional plumber to investigate.
Conclusion
Bleeding the Grundfos UPS2 pump is a simple task that can improve your heating system’s efficiency. Regular maintenance can prevent trapped air and keep your pump working at its best.
