DIY Re gas

Post your Cit/Peu/Ren air conditioning queries or advice.

Moderator: RichardW

User avatar
wrinklet1
Posts: 700
Joined: 23 Nov 2002, 20:15
Location: Bolton, England
My Cars:

DIY Re gas

Post by wrinklet1 » 20 Jun 2007, 20:43

Hi all,
I decided to try re-gassing my Aircon on my Xantia. Went to Halfords and looked at their options.
I decided to get the refill kit, £39 inc free aircon system cleaner kit that cleans the car inside of bacteria. Did the job in less than ten minutes. Car now a lot cooler, smells 100% cleaner and I now have the pressure gauge needed to recharge the system in case I have to do it in the future.
Paul
0x
1xAmi,3xGS,2xBx,2xAX,2xSaxo,1xXantia mk I,2xXantia MkII,1xC1,2xC2,

Chris56000
Posts: 59
Joined: 02 Jun 2010, 22:15
Location: Sutton Coldfield
My Cars:

Post by Chris56000 » 08 Jun 2010, 18:14

Hi!

Is this DIY refilling tackle still available or are TPTB trying to get sales of it stopped? I think my '406 HDi Exec has a low pressure port you can use 'em on!

Incidently I'm aware there's a serious risk of this stuff causing frostbite and irrepairable damage to eyes if you try and fill/regas the wrong side!

Chris Williams
0x

User avatar
davetherave
Posts: 883
Joined: 01 Apr 2009, 21:06
Location: Norwich
My Cars:

Post by davetherave » 08 Jun 2010, 20:38

In fairness for another 10 quid you can get it vacuumed and refilled, which puts gas as well as oil in.
Well worth it IMO
Dave
0x
(95) XM Silver 2.1td Exclusive.
(87) Cx 2.5 DTR T1 undergoing major cosmetic surgery.
GPZ500s

MJM
Posts: 126
Joined: 20 Aug 2008, 12:49
Location: Gloucestershire, UK
My Cars:
x 1

Post by MJM » 09 Jun 2010, 15:25

The problem with the refrigerant top up kits, as I see it, is that the quantity of refrigerant and compressor oil needed to restore the system to its design capacity is unknown. The system should be charged through the low-pressure port. I’ve never used one so I don’t know how well they attach to this point. I would hope that they have been designed so that attachment to the high-pressure port is impossible. I’ve just looked at the spec for the Xantia and the high pressure can be as high as 27 bar, attaching a tin can to that doesn’t appeal to me! :shock:

I’m not certain of the date of introduction but “F” gas regulations will outlaw the selling of refrigerants to anyone not “F” gas registered. It is also illegal to knowingly vent refrigerant to atmosphere.

Air con systems can develop other faults such as blockages, which will give the same effect as low refrigerant charge. Adding more gas in this case can just drive up the high pressure without giving any cooling.

I, personally, would never add refrigerant to a system without gauges monitoring both high and low pressures and thermometers giving some indication of how the system was performing.

You will get frostbite if you get liquid refrigerant on your skin. It will boil at about minus 26 degrees Centigrade.

Connect the can to the wrong port and you will probably damage your eyes, arms etc. :shock:

Davetherave has a good point. For the extra tenner it isn’t worth doing it with a can.
:D
0x
MJM
1999 Dante red Xantia Exclusive 2,0 petrol. No smelly diesel for me. Now re-homed
2007 Wicked Red C5 Exclusive. Now a smelly diesel automatic for me.

User avatar
MikeT
Posts: 4080
Joined: 11 Jun 2007, 16:17
Location: Christchurch, Dorset. UK
My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
x 82

Post by MikeT » 09 Jun 2010, 15:58

While A/C services were still expensive I tried one of the cans but wouldn't recommend them.

Either I tilted the can so I emptied the propellant or they don't contain enough propellant to deliver the contents.

Reason being, the can's net weight is 520gms and after my first usage I'm left with an useable 410gms. I used it once but my system must have leaked as my A/C worked great for a few months then degraded.

No, these cans can't be attached to the high pressure port, it's a different size so pretty much foolproof on that score.

Aside from the above reasons, I'd give it 2 out of 10 for effort.
0x
98 S2 Xantia Hatch 1.9TD 143K
CX 2400 GTi

RichardW
Forum Treasurer
Posts: 7934
Joined: 07 Aug 2002, 17:12
Location: United Kingdom
My Cars: '07 307 SW 1.6 HDi 110
'08 C4 Grand Picasso 1.6 HDi 110
x 175

Post by RichardW » 09 Jun 2010, 16:22

I don't think there's a propellant as such, just the refrigerant(*) - which is its own proprellant. Trouble is you need to vaporise it in the can, which happens at the low side pressure (and therefore boiling temperature) which is the temperature of the refrigerant in the evaporator, probably somewhere around 0°C. Quite quickly you use up the heat available in the liquid in the can, so the only way it can boil off more is by absorbing heat from the atmosphere - which it can't do very fast, hence the rate of addition goes down. I managed to get most of a can in my old VSX by putting it in a bowl of hot water whilst I added it. Maybe you should hold the can upside down so you inject liquid rather than gas - but it doesn't say that on the instructions - and liquid into the compressor may not be the best plan (but if it's an oil injected screw, which is very possible, it won't matter, as they are designed to run with liquid present). Given that the cost is nearly what a 'proper' regas is at Kwik-Fit (I know... :? ) it's of questionable benefit.

* the top up cans usually contain some oil as well
0x
Richard W
Still not welding the de-cap...
1.6 HDi central (C4 Picasso / 307 SW)
Xantia HDi 110 now bean tins

User avatar
MikeT
Posts: 4080
Joined: 11 Jun 2007, 16:17
Location: Christchurch, Dorset. UK
My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
x 82

Post by MikeT » 09 Jun 2010, 17:11

I've tried this can on two other cars (both showing low pressure) and nothing happens as opposed to first use, I could hear the transfer taking place, see the pressure increase on the gauge and feel the can temperature dropping rapidly.

I'm going to take it back to Halfords and see what they say.
0x
98 S2 Xantia Hatch 1.9TD 143K
CX 2400 GTi

User avatar
DickieG
Monaco's youngest playboy
Posts: 4892
Joined: 25 Nov 2006, 10:15
Location: Buckinghamshire
My Cars:
x 11

Post by DickieG » 09 Jun 2010, 17:43

MikeT wrote:I've tried this can on two other cars (both showing low pressure) and nothing happens as opposed to first use, I could hear the transfer taking place, see the pressure increase on the gauge and feel the can temperature dropping rapidly.

I'm going to take it back to Halfords and see what they say.

You need to do as Richard says, place the can in a bowl of hot water, works every time. Interestingly A/C fitters use a heated blanket around those large cannisters to achieve the same result
0x
14 BMW 535D Tourer
11 BMW F25 X3 3.0D Sport
06 C3 Desire 1.4
72 DS 21 EFi Pallas BVH

User avatar
MikeT
Posts: 4080
Joined: 11 Jun 2007, 16:17
Location: Christchurch, Dorset. UK
My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
x 82

Post by MikeT » 09 Jun 2010, 18:27

DickieG wrote:
MikeT wrote:I've tried this can on two other cars (both showing low pressure) and nothing happens as opposed to first use, I could hear the transfer taking place, see the pressure increase on the gauge and feel the can temperature dropping rapidly.

I'm going to take it back to Halfords and see what they say.

You need to do as Richard says, place the can in a bowl of hot water, works every time. Interestingly A/C fitters use a heated blanket around those large cannisters to achieve the same result


Ok, I'll give it a go if I get the opportunity before I visit halfrauds.
0x
98 S2 Xantia Hatch 1.9TD 143K
CX 2400 GTi

h2ocooler
Posts: 267
Joined: 01 Aug 2006, 00:35
Location: Chatham, Kent. UK
My Cars:

Post by h2ocooler » 22 Jun 2010, 21:44

I have used these cans, worked for me. I held the can upside down as it is the liquid gas that need to transfer to fill the system (plus its the only way to get the oil in there too.
Rob
0x
2005 Renault Laguna II Sports Tourer Initiale 2.0 Turbo Auto Estate
2003 Citroen C8 2.2Hdi Exclusive Captains Chair
2007 Renault Megane 1.6VVT Cabriolet Coupe Dynamique
02 C5 2.2 Hdi Exclusive Auto Estate (my Dads) DE_FAPPED

User avatar
Xaccers
Posts: 7655
Joined: 08 Feb 2007, 00:46
Location: Milling around Milton Keynes
My Cars:
x 2

Post by Xaccers » 23 Jun 2010, 07:16

Remember, in the cooler months, KwikFit only charge £25 for their regas.
0x
1.9TD+ SX Xantia Estate (Cassy) running on 100% veg
1.9TD SX Xantia Hatchback (Jenny) running on 100% veg for sale
Laguna II 2.0dCi Privilege (Monty)

DIY sphere tool