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PRESSURE IS TOO HIGH ON MY HEATLINE VIZO BOILER HOW DO I REDUCE IT?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 30 Answers

SOURCE: heating pressure gauge goes up

yes tami
there should be a pressure rellief valve fitted.
it also sounds like the heat exchanger is blocked if the hot water is not as good as it used to be and the boiler reaches temperature too quickly then there is scale in the heat exchanger and needs to be cleaned or replaced

Posted on Mar 30, 2009

mrhotandcold
  • 248 Answers

SOURCE: hi. my heatline vizo 24 boiler not working

overheat stat or fan best of luck

Posted on Oct 24, 2009

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1 Answer

Heatline vizo 24


Your cold water fill tube inside the tank is broken off near the top of the tank. Replace the fill tube.

Aug 26, 2014 | Water Heaters

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Need to decrease pressure on a heatline plus 24 vizo? any ideas? also leaking small amount of water under boiler!


There is a pressure adjustment on the gas valve...make sure you set it with a manometer. If the water is just condensate, its ok except if you don't have enough combustion air for the btu rating of the water heater. If it is a leak, replace the water heater

Dec 11, 2013 | 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

My boiler lights up,stays on for 1 minute then cutts out...


You could check the flame sensor is clean and the connections are tight . check the pressure switch as well. also get the over heat could be shutting off too soon ,

Check the rads for air lock ,

May 11, 2017 | Water Heaters

1 Answer

Hi. my heatline vizo 24 boiler not working


overheat stat or fan best of luck

Oct 13, 2009 | Water Heaters

1 Answer

Heating pressure gauge goes up


yes tami
there should be a pressure rellief valve fitted.
it also sounds like the heat exchanger is blocked if the hot water is not as good as it used to be and the boiler reaches temperature too quickly then there is scale in the heat exchanger and needs to be cleaned or replaced

Mar 27, 2009 | Water Heaters

1 Answer

Hot water


there are two main faults with combi boilers not giving hot water. one is a faulty flow sensor, the other is the most common which is a blocked heat exchanger caused by debris and scale in the system. this needs to be flushed out or may require a new heat exchanger depending on the age and condition of the boiler some plumbers may suggest a new boiler.

Mar 02, 2009 | Water Heaters

2 Answers

The pressure on my boiler creeps up to above 3 bar while in use.


As is the case with mostyou can not decrease it...if it gets to high the t&p should come open and drow the pressure with out you doing anything. But just in case post the name and model of you unit and I can give more exact info on it.

Feb 05, 2009 | Water Heaters

1 Answer

Very Hot water coming out of overflow pipe


Is your boiler heating your domestic hot water if so i would turn water off to water maker and see if your boiler pressure stays down below 20 psi. If so water maker is bad. The other thing that could cause this problem would be the boiler pump is out.

Jan 22, 2009 | Protech Systems FasNSeal FSWMKE4 4" Vent...

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