Question about Mitsubishi Mr. Slim MXZ30TN Air Conditioner

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Hot banging i have a evo he c22/24 combi boiler when i use the hot water and turn it off the boiler bangs but only when turning off.

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It sounds like water hammer, you need to install a water hammer device at the water outlet of the boiler. aviliable from any plumbing stores.

Posted on Feb 10, 2009

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Hi can anybody help,i have a vaillant combi boiler and i cannot turn the heating off on the radiators can anbody help cheers!


If you they won't go off when your timer is off. There's a possibility it's clock keeping it on although its turned off, which is fairly rare. However depending in which model of Vaillant you have, if your boiler has a hot water pre-heat on it. Some models which have this the diverter was prone for sticking thus leaving the port for the radiators open when in hot water mode.

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Need to know how to switch off hot water by combi boiler worcester bosch 240 to be able to fix leak on pipe downstairs


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http://www.worcester-bosch.co.uk/homeowner/literature/discontinued-boiler-literature/discontinued-gas-boiler-literature/240-bf-discontinued-december-1997-literature

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hope this is helpful. On my potterton 24 combi boiler it is the valve that sits the lowest, with a slight indent in the black tap. if you turn this for a short period you will hear a hiss and the pressure will quickly build to the desired pressure, when you can them turn the tap back off.

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1 Answer

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when the tap is turned on and the water light on the boiler doesn't this means the diverter valve is not operating it could be down to low water pressure in the house this can be checked at the cold tap in the kitchen. if there is plenty of pressure then it could be the diagphram in the diverter valve is worn or split. the diagphram is only a few pounds but it depends on the engineer you get as to how much money he wants to fit it.
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1 Answer

Boiler bangs when hot water used


You need to install a "water hammer arrestor" they can be found at any local plumbing supply house.

If you can find one with "Shark bite" fittings already installed then there will be no need for soldering or special tools other than a tubing cutter.

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David,

The fact that you're getting a little burst of domestic hot water suggests that the boiler is capable of circulating hot primary loop water through the heat exchanger, but doesn't necessarily do so when it needs to.

What seems to be lacking is a recognition that domestic hot water is now being drawn off, and that the boiler needs to fire up and divert the primary flow through the heat exchanger.

A good place to start might be the flow switch (usually in the bottom of the boiler, where the cold water supply comes in) or the electrical connections to it.

A.

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I want to take a sink unit out. This means I have to turn off the cold water mains and hot water. I have a Worcester combi boiler and am not sure how to turn off the direct hot water . Can you help


Under the sink itself there should be shut-offs. To turn off the water to your boiler, first turn the power off to it at the breaker box. Then on the boiler itself, there will be some valves. One of the valves will be located in the copper line that comes from your water meter. Turn that one off. If you want to turn off the water to the whole house, right next to the water meter there should be a valve. Turn it off and open all faucets to ensure the water is off. Reverse this procedure when establishing water pressure again.

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