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Author Topic: Infinity off 9kg LPG  (Read 6913 times)

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Offline hallrite

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Infinity off 9kg LPG
« on: March 22, 2016, 11:53:35 AM »
We have come across an installation that has been certified. It is a Rinnai Infinity 24 running off an autochange regulator mounted down low running off 2x 9kg LPG bottles. I don't believe that this is compliant because the 9kg bottles can't supply enough LPG without freezing up. What are your thoughts??

Linkback: https://www.plumbers.nz/instantaneous-water-heaters/67/infinity-off-9kg-lpg/1965/

Offline Grant Bourke

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Re: Infinity off 9kg LPG
« Reply #1 on: March 22, 2016, 01:33:32 PM »
1. Not sure about compliance with fundamental safety requirements - it might be OK.

2. May not be compliant with consumer law i.e. not fit for purpose - Depends on whether the customer requested this and was made aware of the limitations

3. Put one of these on and it is probably good to go: http://www.vaporgas.co.nz/products/vapor-booster/

Cheers
Grant

Offline robbo

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Re: Infinity off 9kg LPG
« Reply #2 on: March 22, 2016, 04:33:18 PM »
hi guys, cant see why it would not be o.k. This is done so customer does not have to pay the $90.00 per yr. bottle hire charge. Don't know how much the `electric blankets` cost but will need power point installed, think i would pay the hire charges and stick to the 45kg bottles. The other way is for the customer to purchase 18kg bottles,cheers

Offline hallrite

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Re: Infinity off 9kg LPG
« Reply #3 on: March 23, 2016, 07:34:38 AM »
My concern is that a 9kg bottle won't supply enough gas without freezing up, so as it stands it won't work.
We were asked by a rental agency to go and hook up the new bottles. They thought that the bottle should have stayed with the house when the other tenant left. The new tenant only has bottles with QCC connections and they are not meant to be connected with the POL hose fittings either.

Offline robbo

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Re: Infinity off 9kg LPG
« Reply #4 on: March 23, 2016, 12:41:47 PM »
hi guys,   (9kg bottle won't supply enough gas without freezing up)I`ve seen infinities run off 0f 9kg wouldn't do it myself but hey!! locate them in the sun they will work better. (Qcc connections are not meant to be connected with the POL hose fittings either) so why do they have internal threads, cheers

Offline hallrite

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Re: Infinity off 9kg LPG
« Reply #5 on: March 23, 2016, 04:17:23 PM »
have a read- Worksafe website. It was brought to our attention by our local cylinder tester.
http://www.business.govt.nz/worksafe/information-guidance/all-guidance-items/hsno/hsno-guidance-pages/liquified-petroleum-gas-lpg

Offline Rodza1

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Re: Infinity off 9kg LPG
« Reply #6 on: June 25, 2016, 04:14:22 PM »
I am pretty sure the LPG association of NZ, in there code of practice vaporization rates are given for differing sized  bottles at different temps. If your appliance requires a certain amount of vaporized gas then the bottles being undersized would make the installation non-compliant in my opinion.

Under sizing LPG bottles would be like under sizing natural gas piping (just to save money), which causes potential incomplete combustion and an appliance that has a lower efficiency that what it is rated if it is not receiving enough gas at all times. It seems that some people don't care though so these types of things will always be out there.

I have never seen this but have seen manifolded gas water heater installations with not enough LPG bottles (also manifolded) causing hot water temp issues as the appliances are starved of gas especially in the colder months.
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Offline wombles

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Re: Infinity off 9kg LPG
« Reply #7 on: June 26, 2016, 06:25:17 PM »
I always write on my invoices that a 9kg bottle is not recommended (if applicable) and that if there are temperature issues they must get a 45kg bottle before I return. Sometimes people will just not believe what you tell them and others just want to be cheap.

Offline Jaxcat

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Re: Infinity off 9kg LPG
« Reply #8 on: July 06, 2016, 10:33:25 PM »
Wouldn't do it, wouldn't recommend it - just crazy.  I recently read a report from an LPG consultant that said an Infinity installation with a gas hob should have 4 x 45kg bottles running it - and on megajoule ratings they might be correct - but who would recommend this for an Infinity and hob?  It would need a location test certificate and imagine the yearly rentals - LPG sales would plummet if this was a requirement.  So that is one extreme and this is the other.  I would just walk away from a job like this...
Have you learned lessons only of those who admired you, and were tender with you, and stood aside for you?  Have you not learned great lessons from those who braced themselves against you, and disputed the passage with you?  (Walt Whitman 1819-1891)  American Poet

Offline Brett McQuarrie

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Re: Infinity off 9kg LPG
« Reply #9 on: July 25, 2016, 09:46:05 PM »
Interesting reading

Offline robbo

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Re: Infinity off 9kg LPG
« Reply #10 on: July 26, 2016, 11:40:54 AM »
hi guys, just recently saw a 24lt infinity that was running on 1 9kg bottle for a sleepout. Owner says that it runs fine but I suspect that it runs fine as is only required for short periods of time. I have frozen the BBQ bottle up by running all six burners.
 Am I mistaken or is it the surface area that is the problem? more surface area would equal more evaporation and more available gas. I notice in Aussie they have much larger bottles/cylinders with about 1mtr diameter which is a lot of surface area also just a small copper pigtail to supply gas. Also I believe they do not use rubber pigtails,cheers


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