Bosch Tankless Water Heater Aq 125 Bng Reviews
westp1234
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This is my kickoff post so forgive me if I'm in the incorrect section. Withal, the trouble I am experiencing is that my WH but provides luke warm h2o. The system seems to be operating normally. I turn the hot water on the burner ignites ,the flame is blue , but the h2o is Luke warm . 1 thing I did detect is that the estrus exchanger doesn't get very hot when the system is on. Is that normal? Likewise , the flames on the burners only gets about a one-half inch high from the burners.
Whatsoever help volition exist highly appreciated.
Dana
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The flame regulator probably isn't functioning right- you should exist able to go the thing to ROAR at high flow. IIRC this unit has the aforementioned mechanical feedback as a log of older European tankless units accept.
Download the manual, pull of the outer cover, and see what the flame-control slider is working against. Commonly information technology's a cam of some sort working confronting a spring-loaded (internally) valve/regulator. If the part that should be riding on the cam isn't come, run across if yous can't gently tease it gratuitous and get it working once again. Sometimes at that place'due south an adjustable limit-spiral that can be tweaked in/out a bit to let it operate in a less sticky region.
westp1234
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Thanks for the response,I will requite it a attempt.
BTW....Can you tell me if the heat exchanger is suppose to get hot when the unit is on? Because mines is cold when the heater is on.
Dana
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The estrus exchanger will get hot, but just as hot as the hot h2o. If your flame isn't modulating up and the water temp is tepid or cold, the oestrus exchanger volition be tepid or cold due to the cooling issue of the water running through it.
westp1234
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Brand senses.... So if that's the example the flames is actually what heats the water up correct? I was under the impression the water was heated as information technology passes through the heat exchanger. I thinking my trouble is that my flame is not modulating up high enough to really heat the water properly. As I mention in my previous email my flame only gets most a half to a full inch high. Is that normal? I tried to upload a picture simply I keep receiving an error.
Thanks
westp1234
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-picture of my flame.
Dana
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As I stated earlier, the flames should really roar (equally in much higher than i/2") at full flow, simply should vary with the water flow and temperature adjustment. (If it's set to put out scalding hot water the flames will be higher at a given flow than if its set upwards to evangelize tepid h2o.)
The flame front end in the moving picture looks like its stuck at it's minimum modulated fire, or very nearly that. If it'southward not irresolute at all between minimum water menses and with the faucet full-on, it's not modulating- it's stuck.
westp1234
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The slide on the flame regulator appears to be operation correctly , but the water is notwithstanding luke warm. Bosh sent me a water valve rebuild kit . I installed it and still no luck. Also , the tank will non come up on now unless you turn on two hot water sources. (IE. sink and shower) Do you have any other suggestion to solve my dilemma.
Thanks over again...
Dana
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Something is sticking or maladjusted- information technology shouldn't take excessive flow to start an ignition cycle.
When you say it's working correctly, are you seeing an increment in flame height?
These beasties frequently regulate the output temp when the flame tin't keep up by restricting the catamenia- information technology's believable that the internal mixing valve is sticking or restricted, but I'm thinking that's what the rebuilt kit should accept taken care of.
If you have hard water and information technology's been in service for more than a year, it'due south possible that it'due south liming up on the inside of the oestrus exchanger. To de-lime it yous have to give information technology a good rinse with white vinegar for an hr or so, which requires un-plumbing it from the water system. A small submersible sump pump in a v gallon bucket with 2-3 gallons of white vinegar running for an hr is commonly sufficient. Plough off the gas, disconnect the potable plumbing, and plumb the output of the sump pump to the cold side (or hot) of the unit of measurement, and a hose hooked to the other side returning to the bucket, letting information technology run for an hour or so. (In hard-water country installing them with isolating ball valves and hose connections for frequent deliming is usually a good thought.) Don't put in anything stronger than vinegar or y'all'll probable impairment the estrus exchanger.
westp1234
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Turns out information technology was the h2o valve that was malfunctioning. I installed a new and it fired correct upwardly.
However, I exercise want t thank you for all your assist with this thing.
westp1234
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Turns out it was the h2o valve that was malfunctioning. I installed a new and information technology fired right up.
Withal, I do want t thanks for all your help with this thing.
Source: https://terrylove.com/forums/index.php?threads/bosch-125bng-gas-water-heater-luke-warm-water.44792/
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