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Re-pressure Vaillant Turbomax Plus boiler

Lost manual. How do I re-pressure the boiler?
Maggie

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  • Anonymous Sep 06, 2008

    not enough pressure

  • neez27 Oct 29, 2008

    no pressure

  • pompey 647 Nov 10, 2008

    how

  • Anonymous May 20, 2009

    i want to change the pressure gauge on my vaillant turbomax boiler, is it a case of draining the system, un screwing the water pump and changing the gauge over for a new one. Is that about right

    cheers Chris

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Two pipes coming into boiler on right hand side have brass block valves with a small round recess. These two valves are linked with a stainless fill hose.

Inside the recess on each valve is a small slot, there is a "key" with the boiler but prob lost with the manual. The advantage of the key is its sized so you wont be poking it in the wrong place!

Using a screwdriver turn both slots throug 90 degrees, you will hear water running through. Sometimes one valve is left open so try a combination until the watert runs.

Keep an eye on the pressure gauge and dont let it get too high, if you have no idea of setting pressure head for about 1bar.

Posted on Nov 23, 2008

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On my boiler the pressure keeps coming down to 0 i keep doing it up to 1.5 and now i have found the faulit water inlet pipe that goes outside the wall has water comming out what does that mean

Posted on Dec 02, 2008

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Pressure releif vavle is passing either remove and clean bore and rubber plunger or replace
OR the pressure in the boiler is increasing by plate heat exchanger leaking or filling loop passing water
OR boiler overheating and causing high pressues

Posted on Jan 06, 2009

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Posted on Jan 02, 2017

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2 Answers

Why does the central heating lose pressure all the time?


hi Marcella.
The cause of the boiler losing pressure can be due to wear and tear or an underlying fault on either the boiler or the central heatingsystem. In most cases, we find that the central heating has been checked for air in the radiators or work for example a radiator has been taken of the wall.

Why Is My Boiler Losing Pressure Q&A - Emergency Plumber

https://www.emergencyplumber.uk.com/plumbing/boiler-losing-pressure/


What would cause a boiler to lose pressure?The following are the two most common causes of lost pressure and how to spot them. If your central heating is losing water pressure that usually means it is losingwater. This could be due to a leak somewhere in the system, which is not only bad for your water pressure, in could end up causing damage to your home.9 Jun 2015Why Your Boiler is Losing Pressure ' DHS Heating and Plumbing, Bristolhttps://www.dhs-uk.com/why-your-boiler-is-losing-pressure/Search for: What would cause a boiler to lose pressure?

why does central heating lose pressure Google Search

Nov 30, 2017 | Washing Machines

Tip

Valve Pressure Reducing or Pressure Reducing Valve


dfef4ee.jpgThe pressure reducing valve on a boiler is the way that the water pressure in the boiler is controlled. The standard pressure for many hot water boilers is considered to be 12 PSI. To keep the boiler pressure at or near the 12 PSI mark a small valve is used for pressure reducing. Most domestic water systems run between 20 and 60 PSI, so the pressure must be reduced for the boiler.

This pressure reducing valve is installed in the pipe that goes from the domestic cold water to somewhere in the piping on the heating system, usually at or near the expansion tank. The valve is mostly maintenance free but will create some problems at times. Some of the things that can go wrong are:

  1. The valve seat can get dirt stuck under it causing water to leak by and increase the pressure in the boiler, causing the relief valve to release water periodically.
  2. The valve can become plugged with dirt causing the boiler to not have enough water pressure, which will cause circulation problems with the boiler pumps.
  3. The valve can leak causing a mess around the boiler area.

Replacement of the pressure reducing valve is not difficult if the installer strategically placed manual valves so that the reducing valve can be isolated from the rest of the system for replacement.
If the water pressure reducing valve fails in any way, it is usually best to just replace the whole valve rather than trying to repair or fix it. I have tried a number of times with only temporary results. These valves are not a high dollar item and the time it takes to fix them is not worth it.

http://www.fixya.com/support/r3696173-expansion_water_tank_boiler_expansion

http://www.fixya.com/support/r3705970-heating_circulating_water_pump_problems

on Dec 23, 2009 | Heating & Cooling

1 Answer

I've got a Worcester Bosch boiler had a leak In the pipe On the landing so a friend emptied the boiler an I fixed the pipe but I don't know how to refill the boiler


Can you get the manual online? You have the Manufacturer info so you probably have the model number too. I found a manual on Manuals.com for my boiler so they may have yours too which will hopefully have some information on filling boiler although I realize each installation is somewhat different but that's why it's difficult to answer you question. Usually there is a manual pressure valve that regulates the water pressure in the boiler which is usually pretty low...like less than 20 lbs. The manual should tell you the pressure as well. But this pressure valve has a flip handle that comes off the cold water line to the boiler to do just what you want to do...refill it with water. When refilling the boiler (if you find the valve, you may have to purge the air out of the lines which there is a whole other process for. But you shouldn't allow cold water into a hot boiler...it could crack it when the cold water hits the hot cast iron. So make sure the boiler is cool when filling it up.
Now go try to find that manual!

Nov 22, 2015 | Bosch Water Heaters

1 Answer

No hot water pressure in bathroom


bleed the system,sounds like an airlock issue

Apr 05, 2017 | Water Heaters

1 Answer

Wickes 102 combi boiler constantly loosing water pressure


It sounds like your thermostat could be the problem. Have you noticed the boiler cutting off at all, or does it run continuously until it goes out on low water?

You stated, "when boiler is on", so I am wondering how you get the boiler on. If your boiler is controlled by a thermostat, you need to check it for a cold draft possibly from behind the thermostat in the wall where the wires come through. The thermostat should never be on an outside wall. The thermostat could be defective.

An aquastat can also control your boiler. If you have an aquastat, check the setting, typically 175 - 180 degrees. You should also have a "high limit" which should be set at 210 - 220. Some people run that high side limit higher; not a good idea - defeats the purpose. If the aquastat is set too high, the boiler will operate too hot and the problem you have will occur.

"pressure rises and pressure relief valve opens" This could mean that your pressure switch is prematurely venting. Check boiler temperature to see exactly at what temperature the T&P valve purges. If it blows off below the high side setting, either adjust or replace. The T&P valves are usually not adjustable. That blow off temperature is stamped on the head of the valve. So, if it discharges too soon, replace it.

Have you actually seen evidence thgat the T&P valve is opening? You may have a bad bladder in your expansion tank and your system may have air in it. Your boiler should have 12 psi when cold and 20 - 22 psi when operating. Check your boiler pressure guage.

"
this eventually drops below the minimum operating pressure" Technically, there is set point for a NO MINIMUM OPERATING PRESSURE. That is a function of the amount of water in the boiler. If the T&P is blowing off, it will vent water from the boiler and the boiler pressure will go down. There is a minimum operating TEMPERATURE.

Your boiler could be low on water. You will have to manually fill the boiler. Be careful of thermal shock to the boiler. Feel the piping, and fill only when the circulator is running. Make sure the water is not going directly into the boiler. The supply water should go into the circulating supply side which feeds the radiators, radiant floor, or base board circuits.

All this will adversely affect your hot water. The heat exchanger for the potable hot water may have scale build up in it. Using the hot water keeps the boiler running, and a scaled heat exchanger will give you cooler hot water and the boiler keeps running. If this is a problem, you will need to replace the heat exchanger. A better idea is to not use the boiler for your domestic hot water. Why run the boiler in the summer?

Feb 02, 2013 | Water Heaters

1 Answer

I have a francisfrancis x8 machine and cannot find my owners manual. I have a red light blinking after using the steam wand and need to know what that indicates. Also, where can I download the manual?


I've lost my manual too. I think the red blinking light means that the boiler is cooling down (from making steam). This machine only has one boiler so it must cool down and relieve the pressure built up by the steam before making another shot of espresso. You can turn the wand back on and shoot the hot water into a mug and this will speed up the cool down process.

Jan 15, 2011 | FrancisFrancis! X5 Espresso Machine

1 Answer

I have a worcester 28cdi combi boiler. The pressure keeps going up yo 3 bar when the heating is on, and venting of via the pressure valve. When the boiler cools down the pressure drops to zero, and I have...


Your boiler has an expansion vessel that is like a bladder full of air. Yours has lost it's air pressure. Check your manual for this vessel and where the valve is to re-inflate it and what pressure to inflate to. It should have a simple tyre valve, pump it back up (usually to about 1 bar after releasing the water pressure) and should be all fixed. If you can't re-inflate the bladder is holed and the expansion vessel will need replacing.

Dec 05, 2010 | Water Heaters

1 Answer

Hi There, I have an Ideal Response 120 Combi Boiler. Each day the water pressure falls to 0 on the pressure gauge. In order to get hot water and Cental Heating I increase the pressure to 1.5. The Hot water...


I have the same boiler with a similar issue. The water is more than likley leaving the system from the pressure relief valve, which will be routed outside. It sounds like you have lost the pressure in your expansion tank, which is inside the boiler. With the boiler pressure at zero and the power isolated, the expansion tank can be accessed from a panel at the top of the boiler on the right hand side. You will see a valve on the red expansion vessel like the one on a car tyre and can be pressurised with a car tyre air pump. I think from the manual the pressure should be about 1 bar, but it depends on the length of pipework on your system. A competent boiler engineer should be able to sort this out, but it may be that your valve is leaking, or the expansion vessel has failed and the problem will occur again.

Nov 10, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

Combi Boiler pressure gauge reading 0, and radiator half on!


The first thing you need to do is to put some more water into your heating system. This is usually done by allowing water from your (pressurised) domestic cold water supply to flow into the system: On older boilers, this is done with a connection (often made with a removable hose) on the pipework just outside the boiler. Newer boilers may have a built-in connection with some sort of removable link (sometimes looks like a plastic key).

Once you've got the boiler up to working pressure (typically about 1 bar - 15 psi), you should be able to bleed your upstairs radiator properly.

This may be all it takes, though the pressure excursions you're getting when you run the hot tap suggest there may be another problem. See what happens to the pressure as the boiler heats up and cools down. There really ought to be very little pressure difference between the two conditions. If you see significant changes, this usually means that the "pressure vessel" (or in hydraulic terms, system accumulaor) has lost its air charge.

The pressure vessel is a metal container inside the boiler, usually painted in red enamel. Somewhere near the top, you will find a schrader valve (like the one on a car tyre), and you can use this along with a tyre pump to replenish the air in the top of the vessel. This will reduce your pressure transients for a while, but you need to keep an eye on it. If the problem returns, you probably need to replace the pressure vessel (or clag another one into the plumbing alongside the boiler).

A.

Feb 03, 2009 | ACCO Brands Water Heaters

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