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My vokera 16e is loosing pressure after central heating goes off.not sure if its safety valve or expansion vesssle.i have let system go cold topped pressure up to 1 bar . turned on heating after about 20 minutes pressure was up to 3bar release valve was dripping .turned off heating pressure has dropped to 0 again when cooled down.before i topped up system i depressed valve on top of expansion vesssle air came out i assume thats correct,any help would be great

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  • Heating & Co... Master
  • 2,460 Answers

Don't take air out of the expansion vessel the air is there for the diagram to work . you have to see how bad the drip is on the saftey valve any loss from there is not good . try changing safety valve first cheap fix if you still have the same problem then its the vessel did you bleed the rads after topping up ?

Posted on Jun 15, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

mrhotandcold
  • 248 Answers

SOURCE: worcester oil heatslave boiler pressure rises to over 3 bar when

iif you,ve tried everythng change gauge

Posted on Oct 12, 2009

  • 534 Answers

SOURCE: Hot air blows but cools down in 15-20 seconds.

You likely have a restriction in the heater coolant hose circuit - perhaps a coolant control valve not fully opening, or a kinked hose.
Insufficient coolant volume is flowing to keep the heater core hot.
Try back flushing the heater core system with a garden hose to check flow.

Posted on Nov 13, 2009

chamboard
  • 557 Answers

SOURCE: Noticed that pressure was low today on Greenstar

there are air in the system let it out til you get water in the release outlet fil up to 1,5 or 2 bar no problems wil started also control the expan ballon for bilding and expanding the pressure

Posted on Dec 20, 2009

SOURCE: I have a vokera mynute 16e boiler and the light is

If this is a newer boiler, if it has a control board with a 24volt output
check to make sure boiler has line voltage to it. No fuse Blown/Breaker
Tripped.

If that is not the problem and power is available it could be the thermostat. If there is a pump involved,make sure it can operate

Posted on Dec 28, 2009

  • 2460 Answers

SOURCE: Baxi 130HE losing pressure

I would go with the valve first cheaper, then see if it still doing the same thing

Posted on Mar 04, 2010

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I have a GE Profile Water Heater Model #SE40M12AA01.


I recommend safety changes to prevent ruptured water heater and assorted leaks.
135 degree hot water.
Maybe replace TP valve if it is dripping.
Drip pan under water heater with 3/4" drain line to outside.
Expansion tank on incoming cold water line to absorb pressure build-up, and prolong life of tank and plumbing.

Here's why:

1) Yes you can have scalding hot water.

2) I recommend 135 degrees since that will burn the evil right out of ya. And generally kill clothes washing bacteria.
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html

3) 150 is dangerous and can seriously burn skin in 1.5 seconds. Not safe around children and elderly.

4) Temperature settings on electric water heater are approximate, since thermostats are calibrated approximately, and read temperature through tank wall.

5) Also if you want to increase amount of hot water for high-consumption household, then setting tank temperature upward is one solution since more cold water is mixed with hot, so amount of hot inside tank goes further.

6) High temperature can cause TP valve to release water.
TP valve is pressure-temperature safety valve. Do NOT cap off.
Rating should be 125 psi and 180 degrees ... but all things water heater are approximate, and TP valves need replacement now and then.
It is not recommended by water heater manufactures to use 150 psi TP valve when water heater came with 125 psi. Rating shows in small print on end of TP. New TP valves sold at local hardware. Let tank cool before installing new one.

7) Higher temperature and high pressure can rupture tank.
Pressure over 80 psi shortens life of water heaters and plumbing fixtures. Put BTG100 pressure gauge on water heater drain valve to check pressure.

8) You need a drip pan with 3/4" drain line to outdoors, or to drain vent line, to prevent flood caused by ruptured water heater.
Turn water heater off when going on vacation.
Inspect water heater each 6 months.
Drip pan available at local home center or hardware:
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html#drip

9) Heated water expands and puts pressure on tank and pipes.
Water does not compress... so when water gets hotter it expands against tank wall and against pipes.
Especially in closed system (check valve present) when system is without expansion tank.
Expansion tank is installed on incoming cold water line.
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html#expansion

Oct 31, 2012 | Water Heaters

2 Answers

My worcester bosch 24i junior pressure keeps dropping if i have heating off for an hour i have to top up boiler and reset also when i have heating on the pressure jumps right up to over 4.0bar


When water is heated it expands. To deal with this all boilers are fitted with a small expansion vessel which is like a reservoir which holds the excess water.

This expansion vessel is like a balloon in a metal pot. When the water goes in the metal pot the baloon squashes a bit to make room for the extra volume of water. When it cools the balloon pushes the water back into the heating system.

What has happened is your expansion vessel no longer works. When the water heats up there is nowhere for it to go so the pressure jumps up to 4 bar. The Worcester boiler lets high pressure water escape (most boiler allow this to go through the safety valve at say 3.5 bar).

When the water cools the pressure drops very low as the volume of water contracts.

The problem is your expansion vessel - normally a little red painted metal cylinder inside the boiler.

Dec 22, 2010 | Bosch Water Heaters

3 Answers

MY VOKERA BOILER IS NOT WORKING I HAVE NO HOT WATER AND NO HEATING


try check in the water pressure on the boiler should be on 1.5 bar

Jun 01, 2010 | Heating & Cooling

2 Answers

My heat unit will not blow hot air unless we go outside and hit a button on the back bottom of the unit. Once we do that it will blow hot air for that cycle. when it is time for it to come on it is cold...


If it does not have a furnace or heating elements for heating, then it is a heat pump, which is rare for a central AC system, but makes sense of the fact that it blows warm air when you reset the pressure switch, which may indicates freon pressure charge problem if your AC system has a reverse valve and uses freon to for heating (heat Pump).

Do you get heating when outside unit runs? if you do, check freon pressure levels and top up to required pressures. The button you depress is a pressure reset switch ... that is if your AC system is a heat pump ... which, as pointed above, it is not common for central ACs.

Nov 07, 2009 | Ruud Central System Air Conditioner

1 Answer

Low pressure on recently serviced Vokera 14/48se.


Identify the cold feed to the boiler, then look for a tap/service valve which when turned lets water into the boiler via a fill loop to pressurise it. 1-1.5 bar is ok
ju

Nov 05, 2009 | Water Heaters

1 Answer

I have a VOKERA 24 boiler the Linea range which was working fine until i notes the pressure was a little under 1.5 Barr. I topped it up the pressure with the filling loop every thing was fine. The next day...


Water logged expansion tank ( ruptured diaphram in tank) or wrong size tank. This caused the excessive pressure in the system causing the relief valve to open. Also, air in the system causing flow to stop, Both conditions will cause boiler go out on safety.

Sep 13, 2009 | Water Heaters

1 Answer

Vokera combi boiler


there is a zoneing valve thats suppose to be in the line to keep this from happening, might even have a check valve either way which ever one you have is bad and should be changed with a new one

Feb 20, 2009 | Water Heaters

1 Answer

Open vent central heating


yes it is possible toupgrade the system to a sealed one using a system boiler as you mentioned. the thing to bear in mind is to upgrade the radiator valves to pressure rated ones 10bar.
The probable cause of the over heating is down to the system being sludged up/cold feed blocked, or possible pump circulating problem?
I would recommend the installation of a magna clean filter to help keep the new boiler clear from system debris.I would definately power flush the system, if the system is a twin two port valve system then a automatic bypass should be fitted, all of this done by a corgi registered gas engineer

Kindly

Richie

Dec 18, 2008 | Protech Systems FasNSeal FSWMKE4 4" Vent...

2 Answers

Vokera option combi boiler seems to increase in pressure until it opens the safety vave ,only when heating is on !


check to see if the expansion tank is completely full of water or isolated from the rest for the system. If full it needs replacing, if isolated (valve turned off to it) then turn it on. When a hot water heating system cannot allow for expansion then the pressure will increase when running until the saftey opens.

Nov 26, 2008 | Heating & Cooling

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