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In the process of having our kitchen updated and thought I would share a couple of pictures of our new Vaillant ecoFIT Pure 418 condenser boiler installation which included a TF1 Omega Filter (similar to Magnaclean) option.
Vaillant ecoFIT Pure 418 condenser boiler:
TF1 Omega Filter (similar to magnaclean):
Note (no Isolation Valves fitted)
Attachments:
In a completely sane world, madness is the only freedom (J.G.Ballard).
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FWIW, there is no substitution for professional advice, the above system was installed by British Gas (BG).
but for reference and as a guide, I have a heat only system, i.e. hot water cylinder in the airing cupboard and water tanks in the roof space, flow temperatures to and from the condensing boiler are critical.
let me explain … (my thoughts not BG)
Firstly, stored water that is below 60°C may encourage the growth of Legionella bacteria (Legionnaires’ disease) therefore stored hot water should be maintained at a minimum temperature of 60°C in the cylinder to deter Legionella bacteria.
Secondly, in order for the Vaillant ecoFIT Pure to run optimally, the return water going back into the boiler should ideally be below 55°C (dew point is around 55 °) this encourages the condenser boiler to actually ensure optimal heat recovery.
As the hot water cylinder needs to be at a minimal stored water temperature of 60°C, the Vaillant ecoFIT Pure condenser boiler flow temperature should to be set around 65°C to ensure the water cylinder can actually reach a temperature of 60°C as a minimum and allowing for heat lost in the pipes (not radiators) before the hot water from the boiler reaches the hot water tank.
The challenge I see is that I can set the flow temperature of the boiler (water leaving the boiler) easily but to check the flow return water temperature requires you to go into installer mode via the control panel which is complicated and only available on the Vaillant ecoTEC models as far as I am aware
Luckily, if you have a combi boiler, then the dilemma of stored water is not a problem and flow temperatures can be reduced ensuring a condenser boiler runs more efficiently.
Note!
Youtube clip showing Vaillant EcoTEC Checking Boiler Flow & Return Temperatures procedure
In a completely sane world, madness is the only freedom (J.G.Ballard).
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We also had the Drayton Digistat RF902 Dual-Channel RF RF902 controller and room stat installed which manages heating and hot water for one or two separate heating zones, this comes with an app (Wiser Homes – Schneider) that allows me to set both hot water and heating independently for both temperature and times.
The app has a very handy option called boost which allows heating and hot water to be turned on at any time and bypasses the daily heating and hot water schedule you might have.
In a completely sane world, madness is the only freedom (J.G.Ballard).
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Three weeks later …
So the Vaillant EcoFIT Pure 418 (18kw) has been running for the last 3 weeks and must say, most impressed with our new condenser boiler I am.
The boiler meets all our hot water needs, including lots of baths, heating works well and we did have a radiator in a little box room that never seemed to get warm, now reaches temperature after and hour or so.
The Vaillant EcoFIT does have a louder than expected fan (hum) when the boiler first starts and hot water demand is high, so have decided to reattach the kitchen cupboard back around the boiler until new kitchen is fitted, but more than happy to endure a little noise for boiler efficiency and longevity, time will tell on the latter.
Only gripe I have with our Vaillant EcoFIT is that after a few days the boiler was making a few loud clicking noises when it was heating up and cooling down, so had a look online and seems a common issue with the Vaillant boilers, I called the Gas Safe engineer back to adjust the torque screw setting on the heat exchanger (to tight they are) and since then we only hear one click on occasions (not gas valve) when boiler heats up.
Note: Gas Safe Engineer was also a Vaillant engineer.
In a completely sane world, madness is the only freedom (J.G.Ballard).
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