Discuss Problem with a instantaneous gas water heater running a thermostatic shower in the DIY Bathroom Remodelling Advice area at PlumbersForums.net

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Hi Guys.
just fitted a thermostatic shower to a Vaillant MAG-sine 250/7 ATZFW H multipoint boiler.
And it doesn't seem that warm enough, in between the 38% (default setting) and the MAX setting the difference is only 2%.
Any idea's how I can more heat out of it?
thanks in advance.
 
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Riley

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I assume you’re meaning °c rather than %. Is your hot water on the boiler turned up?
 
OP
gort
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It's around 36%c out of the shower, and when I turn the bar shower valve up to MAX it does't make much difference
 

king of pipes

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More to the point have you adjusted the temperature control as the manufacturers instructions ? all new showers are set to a maximum 42degrees by the manufacturer, if you have hot water everywhere else this could be the problem . Kop
 

townfanjon

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As above just needs calibrating , read the instructions if you have them
 
OP
gort
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More to the point have you adjusted the temperature control as the manufacturers instructions ? all new showers are set to a maximum 42degrees by the manufacturer, if you have hot water everywhere else this could be the problem . Kop
I take it you have fitted it the correct orientation?
I haven't done the installation...got a mate to do it, sorry what do you mean by orientation?
 

Gasmk1

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have you considered that there is not enough hot flow through the shower so its modulating down so as not to overheat.
 

Ben-gee

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Is there a button to press on the flow control?

This limits the flow and can cause this problem as gasmk1 suggests above.

If there is, press button and fully open valve- if this sorts the problem. Remove flow handle and remove the plastic ‘snail trail’ do the valve just opens fully without the button needing to be used.
 
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gort
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thanks guy's,
I've got it warmer by turning up the boiler....now... why didn't I think of that.
 
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