Daikin Altherma AFVALVE1 Anti-freeze valve

[willbish]

Has anyone used these on their ASHP install?

 

Saves all the playing about with glycol but at some cost

[ProDave]

Care to explain how it works?

[willbish]

21 minutes ago, ProDave said:

Care to explain how it works?

 

Not exactly sure, but I think its some kind of relief valve that opens a little if the outside temp drops. They are fitted on the external pipe work.

 

 

[dpmiller]

relies on the pump punning continuously I'd guess. It's one thing water expanding as it cools, but a small fixed pocket of water freezing might be something else...

[ProDave]

5 minutes ago, dpmiller said:

relies on the pump punning continuously I'd guess. It's one thing water expanding as it cools, but a small fixed pocket of water freezing might be something else...

If the pump runs continuously it is never going to freeze.

 

How will a relief valve work to protect anything if the water is not flowing?  It will freeze even if vented to atmosphere.

 

There is either something extremely clever here, or I just can;t see how you can avoid antifreeze in the pipework to an outside unit.

[willbish]

Not sure if there's anything complex 
Features in this install video

 

 

[JOE187]

https://www.ebay.co.uk/itm/183988548162?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D4164b2fbfcbd4d93b656e48326371fc1%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D183988548162%26itm%3D183988548162%26pmt%3D0%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A4f28a0c1-d7e4-11eb-856b-966f034875dd|parentrq%3A51914ba917a0acb45b8a85b7ffee9062|iid%3A1

 

    Would recommend putting heat pump fluid in as oppossed to having pump running in cold weather.