Question about Heating & Cooling

1 Answer

Pressure upto max nearly im my bolier - Heating & Cooling

Posted by on

  • keypad4 Dec 19, 2008

    thanks bob , ya sorry its a gas waterboiler combi and its leaking water when i turn on boiler . i changed a tap yesterday and turned off a water valve but opened it up to much when finishing with the new tap .. there seemsto be 3 valves, two have black little thunb levers and the one in the middle looks like a nut that looks like itcould be adjusted .. should i losen or tighten that ?
    thanks for your help mate :)


×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 833 Answers

You don't say what kind of boiler this is but I'm going to guess that it is a hot water boiler.  If so, you have a combination valve which adjusts the water by pressure and bleeds off excess.  These valves do get corroded and dirty.  Shut down the boiler, shut off the feed water valve.  Replace the valve assembly.  Do not try to adjust these things.  Your new valve should maintain about 15 psi.

Posted on Dec 19, 2008

  • Robert Hirst Dec 22, 2008

    Keypad...thanks for getting back.  There is a valve set which feeds the boiler with water which contains a few parts: a pressure regulator with a screw on the top and a safety unit with a drain tube or fitting at the bottom...sometimes, these units are separated with the safety drain unit set on the boiler.  


    I'm assuming that the leak is coming from the part of the valve set which has a drain line...just a fitting where a pipe is probably screwed in.  This is the overpressure relief.  It is saving your boiler by not allowing excess pressure.  The pressure builds up in the system when the water in it expands as it is heated.  It is not adjustable but it has a lever which you describe on it which will allow you do 'dump' pressure.  


    If you want to adjust the feed valve which has a nut on the top, loosen the nut and then use the lever on the safety to let water out...slowly.  If the boiler is cold, you should allow the reading to go down to about 1/3 of the scale or so say 8-10 pounds...if hot, no more than 2/3 of the scale (that's 15 pounds per square inch...100 KPa).  If the adjustable valve starts bleeding water in, back it off a bit more.  If it is bleeding at 15 or lower, it will need to be replaced.


    Watch the boiler through a cycle...stop by occasionally...and see that the needle is at that 15/100 point and the safety is not bleeding.  


    Note...you will likely need to change the valve set out if it is more than about 15-20 years old.  They are not expensive and will be pre-adjusted.  I've tried cleaning them up but found it a giant waste of time.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a Vaillant Combi boiler, (not sure of make, but its 10 years old),the hot water works fine and the bolier heats up the downstairs rads fine, but the upstairs ones have all gone off...have bleed them...


lost pressure raise pressure up 2 bar and bleed the rads keep topping up untill all air has gone from rads do this with the pump off, turn all your rads back on and follow what in said .

Aug 27, 2011 | Heating & Cooling

1 Answer

Ive just had a new valiant 28 pro boiler


the faster the flow the low the temp , the slower the flow the hotter the temp

Feb 06, 2010 | Heating & Cooling

1 Answer

Memory Upgrade


sorry ..you can go upto max 2 GB only with this motherboard...

Jun 20, 2009 | Computers & Internet

1 Answer

Boiler problem


check the air flow,venturi in fan and pressure switch

May 16, 2009 | Sun Time NCAA Purdue Boilermakers...

1 Answer

No hot water from combi boiler


i have a combie bolier when i turn the hot water taps on only cold water comes out central heating working fine can any one give some advise ?and can i fix it myself.

Jan 03, 2009 | Combi Centre DX - Mango

1 Answer

Motherboard query


If this is your board, it only has DDR support upto DDR400 (pc3200) upto 2gig, not DDR2 support.

All the rest of the specs are on the page anyway, so pointless repeating them all.

Apr 16, 2008 | Foxconn (865G7MC-ES) Motherboard

1 Answer

Msi 654e max atx mother board


If your manual states a max of 2.2GHZ then, take it as that, when your board was made the bios and bus speeds would be set at the maximum to run a 2.2GHZ, not a 3GHZ, also the heat sink and fan may not be enough to cool the processor. The only way that a 3GHZ would run was if you updated the bios and personally i would not recommend it. You would be better advised updating the board and processor as a package ot fitting more memory if the pc is not used for gaming or high end video editing.

Apr 19, 2007 | MSI 645E Max Motherboard

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

107 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2364 Answers

Dan Webster
Dan Webster

Level 3 Expert

8205 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...