HVAC Questions? Ask an HVAC Expert for Answers ASAP
Good afternoon, this indicates a loss of pressure. Do you need guidance in topping up?
No problem. I need to establish which type of filling loop you have. Bear with me, I will attach a photo…
Can you see a filling loop anywhere that looks like the one in this photo?If not, please tell me the model of your boiler.
Let me know if you need any more help :-)
OK. Would you prefer guidance on the phone, or on this forum?
OK I don't know why you were cut off. I didn't receive a call at this end. On here is no problem.____Can you see the pressure gauge? It would help me to know the model of your boiler.
OK. Can you see the pressure gauge?While you're looking I will pull up the manual...
So it's at the extreme left? Are there coloured segments on the gauge?
OK. In the following instructions, your target for the gauge needle is halfway to two-thirds along the grey. It's not important to be exact, but it's important not to set the pressure too high - whilst it's in no way dangerous, it could lead to other problems._____So, you see the two black-handled valves on the braided hose (as per photo). In the photo those handles show the valves in the closed position. Are your black handles at 90 degrees to the ones in the photo? Don't turn the handles yet!
Correction! Sorry - in the photo, the valves are in the open position! Apologies.
I sympathise - I also see the phone call request and can't get rid of it! (I will feed this back to the site operator.)North/south? Are the handles like the ones in the photo I sent, i.e. aligned with the hose, or are they "across" the hose?
That's perfect. They are both closed at the moment.So, could you attempt to turn one of the handles 90 degrees, to get the feel of it. Then close it again. Nothing should happen - this is just to check that it's not seized or difficult.When you've done that, and it's closed, open and close the other valve, for the same reason. Again, nothing should happen.Let me know how that goes.
Great! Now the steps to increase the pressure. Please read through the following before starting to do it.1. Open one valve and leave it open2. Before opening the other one keep your eye on the pressure gauge.3. Open the other valve - you should hear water passing through it. Close that second valve when the pressure reaches halfway along the grey section. It should take a few seconds, but there are some situations where it can rise very quickly.When you close that second valve, the needle might drop back, so you can open again to top it up a little.Then close the first valve, and start the boiler. Some Vaillant boilers will detect the change and start automatically.
Hurrah! I suggest that you keep an eye on the pressure over the next week, in case there's a new problem that is reducing the pressure.In the meantime, if your happy with my assistance, please rate me using the 5 stars at the top of the page. The customer's rating is what enables an expert to be paid for their time, so I hope I was helpful to you.
Ah - forget that last paragraph - I see that you already have rated me. Thank you :-)
You're very welcome, Lindsey and your dog :-)