Servicing a Vent Axia Sentinel Kinetic Plus B - 8 years old unit

[jack]

6 minutes ago, Stones said:

Given the comparatively low flow rates of MVHR, I can't say I've noticed much of a difference -

 

Our house can get very hot upstairs during long runs of hot days. I've not got around to setting it up yet, but I have plans to boost the MVHR during the cheap overnight period when conditions are such that the summer bypass function is enabled.

[Pocster]

Temperature nice and chilled in the dungeon . Having said that body heat can raise it a bit 

[Ade]

Hi, 

 

So I have a Kinetic Plus B (443028), from some 10-12 years ago. Same issues / results as seen as above. 

Some mould inside unit and on Heat exchanger cell. Not the easiest to clean! 

Broken end panels of Heat Cell where joining to body of Heat Cell. And some elements broken. Can be glued successfully with plumbing pipe solvent glue :-)

Torn seals - Thanks for identifying "neoprene adhesive backed tape" Will now source. 

Broken "teet" on Bypass actuator - See below. 

All else (touch wood) still going strong)

 

 

My  actuator is 100331.27K  T105

 

I have managed to break the "teet" off the end that engages to the summer bypass mechanism. 

 

 

So looking around:

£50ish:

https://electricspares.co.uk/product/vent-axia-actuator-kinet-airminer/

 

 

But how about this:

£14: Got to worth a punt?

https://www.leisure-parts.co.uk/thermoactuator-eltek-b10-kt105/product.pl?pid=10656

 

 

 

UK seller of Eltek

https://www.radward.co.uk/eltek/10033127k

 

 

Aus Ebay - but used in other products, which might help. This has the same "teet" as mine did....

https://www.ebay.co.uk/itm/143189739579

 

 

But I haven't worked out all the product coding as (all these - at the "right sort of price", have different ends):

https://www.ebay.co.uk/itm/405603465584

https://www.ebay.co.uk/itm/356691708759

https://www.ebay.co.uk/itm/205336941517

 

Hope this helps. 

 

Ade

[JamesP]

On 03/07/2025 at 18:23, ProDave said:

"Summer bypass" is a poor description of this function.  It is in reality "heat exchanger bypass"

 

On 04/07/2025 at 10:07, Nickfromwales said:

+1, and it is a royal pain to have to try and explain this over and over again with each new client.

So 5 years in and think I now understand the summer bypass has minimal effective function in the warmer months. It's 16c outside, it's midnight but the air supplied is at 23c with summer bypass on or off.

I naively assumed with the bypass on it would supply the external temperature and have a moderate

cooling effect.

Is the heat exchanger supplied by the extracts?

Help.

 

[jack]

7 hours ago, JamesP said:

So 5 years in and think I now understand the summer bypass has minimal effective function in the warmer months. It's 16c outside, it's midnight but the air supplied is at 23c with summer bypass on or off.

I naively assumed with the bypass on it would supply the external temperature and have a moderate

cooling effect.

Is the heat exchanger supplied by the extracts?

Help.

 

Your assumption isn't naive, that's exactly how summer bypass should work. 

 

Are you sure the function is enabled, and the mechanism is in working order?

[JamesP]

52 minutes ago, jack said:

 

Your assumption isn't naive, that's exactly how summer bypass should work. 

Are you sure the function is enabled, and the mechanism is in working order?

@Stones

Maybe it does have a fault or I misunderstand the indoor & outdoor temperature settings.

I think I should set the indoor temp as low as possible, 16c and the outdoor as high, 20c to enable bypass.

The Outdoor Temp screen enables you to choose the

minimum outdoor temperature at which the bypass will

operate in degrees Centigrade – only displayed when

the bypass is fitted.