Daikin units on R22

[multisync]

I got told that Daikin Japan are about to release 'something' which will mean the outdoor unit is replaced but the indoors and pipework remain. (even VRV)

Anyone heard this too?

[Clk320_Greg]

IMO that would be crap, the old R22 casetts for example are horrible units. Also the old style controlers look shabby and often the sliders give up.

I can see it being useful in a few cases but not enough to make it cost effective for them to produce i would have thought?

Unless its going o be like the Mitsi thingy that flushes the system and stores it away?

[brunstar]

no they will not do that, the indoor copper thickness will not be thick enough. The expansion valves will not take it.
The indoor coils will be too big.
The transmission on the various units will not communicate.
I can't see it happening and they would not warrant it.
if the system is that old everything should be replaced..

[multisync]

no they will not do that, the indoor copper thickness will not be thick enough. The expansion valves will not take it.
The indoor coils will be too big.
The transmission on the various units will not communicate.
I can't see it happening and they would not warrant it.
if the system is that old everything should be replaced..

Wait till January or better still talk to DUK or even Space.

There is /was a big sales meeting in Belgium regarding this sytem which has been in Japan for years. From my understanding it de-rates 410a back down to R22 pressure levels. Only the BS boxes need changing everything else remains..

It also uses a bypass filter like Mitsi

[cadillackid]

dont the laws of physics pretty much make it impossible to run R410a at R22 pressures effectively?
-Christopher

[acnerd]

dont the laws of physics pretty much make it impossible to run R410a at R22 pressures effectively?
-Christopher

That's what I thought, but the Japanese have very clever scientists!! :D

[brunstar]

Nothing is impossible and it wouldn't suprise me.
Even if this is a possibility this will only be specialist applications and i would like to see the warranty on the product....

[El Padre]

Its on the cover of this Months ACR News (VRV-Q), I dont suppose your as well connected within the horse racing fraternity? Especially with Newbury coming up this weekend!

Cheers

[Obi Wan]

Hi all,

It seems like the cat is out of the bag. Yes there will be new VRV systems launched in Feb 2010. It will be known as the VRV III-Q and will be available in heat pump and heat recovery versions (up to 30Hp). It is to allow replacement of the existing R22 VRV systems.

On all old G and H VRV systems series you will need to replace the indoor and outdoor units and the BS boxes.

On K series systems you will need to replace the outdoor units and the BS boxes.

On the G series you will also need to replace all the controls to bring in line with the current DIII Net control line up.

New refrigerant system reduces the R-410 pressures to allow the existing piping to be used. It has a special test run/refrigerant charging function to flush the existing R22 pipe work.

Watch this space.

Obi Wan

[cool#9]

Hi all,

It seems like the cat is out of the bag. Yes there will be new VRV systems launched in Feb 2010. It will be known as the VRV III-Q and will be available in heat pump and heat recovery versions (up to 30Hp). It is to allow replacement of the existing R22 VRV systems.

On all old G and H VRV systems series you will need to replace the indoor and outdoor units and the BS boxes.

On K series systems you will need to replace the outdoor units and the BS boxes.

On the G series you will also need to replace all the controls to bring in line with the current DIII Net control line up.

New refrigerant system reduces the R-410 pressures to allow the existing piping to be used. It has a special test run/refrigerant charging function to flush the existing R22 pipe work.

Watch this space.

Obi Wan
Hi
Well i'm little bit late with this post but i can say i've made retrofit on old G/H/K series with R417A and it runs very well... sometimes you need to change the vdc value from the hp / lp pressure sensor (adding a resistance or change their vdc supply..)
We can say it's less, less expensive ...!
Cheers
cool#9

[El Padre]

Hi
Well i'm little bit late with this post but i can say i've made retrofit on old G/H/K series with R417A and it runs very well... sometimes you need to change the vdc value from the hp / lp pressure sensor (adding a resistance or change their vdc supply..)
We can say it's less, less expensive ...!
Cheers
cool#9

Hi,

Thats interesting, first one that I have heard of,did that include an oil change? If so how did you manage to remove the original oil charge? Did it involve several oil changes?

Cheers

[cool#9]

Hi,

Thats interesting, first one that I have heard of,did that include an oil change? If so how did you manage to remove the original oil charge? Did it involve several oil changes?

Cheers

Hi
You don't need to remove the oil [but change it by the same brand if you can, like on old G series]. The most important is a long vaccum and to be sure there absolutely no leak to keep the state of the R417A and secure oil recovery. I've a RSXY10GY1 working like that since 2007, and very well indeed...
rgds
cool#9