Got a Question, can you control the tempreture of the outflow of the hot water heater..

we have a Renni instantaneous HWS, it has a digital control[needs 240v] you can set the tempreture to what ever you want it at.. Even to say 42 degree, so I was wondering if it does the same then you don't need cold water at all..
the question is HOW much Gas do they use..??

Gas Appliances I leave to the Gas fitter's I only run the Power Point's to them..

Juergen


I DO NOT recommend the Renni Gas HWS system for the RV's.. All I was asking do they have a thermostatic control...

In reply,

 These units are now available in Australia through reputable dealers so they would be Aus Compliant. They do have a thermostat but from the forums in the USA it still doesn't seem to affect the outflow temp too much. Just a lack of water pressure is the main problem it appears.

I checked out the manufacturers website and it does state that the unit requires a water flow which you have to determine if your RV/Motorhome will be able to supply. I will have to check my water flow but it looks from the blurb I would have to change to a larger pump as well.

I will have to Google the Renni or is that Rinnai sounds like it would fit the bill. Is it a dedicated RV unit or a home style unit?

Cruising Cruze wrote:

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Have a look here

www.ebay.com.au/itm/Country-Comfort-LPG-Gas-Water-Heater-for-Caravan-Trailer-4WD-Camping-/151178024303



Cheers John

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 We have been running the same system as this, (different brand name but exactly the same unit)  works very well, multible temp adjustments & water flow,no pilot light self lights from two D size batteries & good on gas. Also runs perfect from a normal caravan  water pump.

They are also advertised in the caravan mags for camping etc.

JC.

Thanks for the suggestion Aus-Kiwi.

I toyed with the idea and getting the version that heated the cabin too. However the cost of both versions and where to actually locate the units stopped me going that way. They do look to be a good system though. Although they appear small enough the place I have to mount one is very close to the main electrics panel.

I see they even have a diesel cooktop too.

If I was outfitting a vehicle from the start I think I would go that way.

I checked out the Rinnai suggestion someone else made but where to mount the unit has me beat.

I think my best option is the Suburban and have the old Carver unit replaced with one. It will have to have the external fitting modified as I would have to have the old. Vent on the outside wall of the MH cut out with a bigger hole to allow the old unit to be removed. The original builder put the water heater under the sink unit and welded the whole unit from stainless around it. Cheaper to cut a bigger hole and go that route methinks.

The joys of motorhomes where space is at a premium. Seems that like for like is the answer for my situation.

Thanks for the suggestion though.

We have various set ups for our hot water, a heat exchanger from the bus engine provides all the hot water we need when on the road. When camped we have a 12v/240v 10lt hot water system and 3 of those solar hot water bags, which provide an excellent shower outside, in a shower tent. Pretty rare to use them though. We were going to put in an instant gas heater, which is still sitting at home, but have never needed it and we spent 6-9 months on the road, rarely using van parks. A mate with a 23ft van also has heat exchanger hot water, he runs a snap hose from the car to the van and it seems to work really well for them.

Yuglamron wrote:

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My old water heater ,a Carver which Coromal from WA used to import from the UK a few years ago but no longer do.

Well it's decided it's had it's day and is leaking badly. No hot water so have been looking at a replacement unit.

I had been checking out this so called super-duper gas endless hot water system from the good old USA. Supposed to be selling like hot cakes.

Auto ignition and no pilot light so no tank so less weight.

The alternatives here in Australia seem to be the Truma or the Suburban water heaters either gas only or gas/240Volt.

I decided to check out the USA RV forums re the endless hot water system.

An eye opener. Seems almost every RV manufacturer in the USA is installing them as a standard unit.

This is where it gets interesting. Most of the RV forums say the RV's generally don't have enough water pressure to run the unit effectively. The water gets TOO HOT. 

There is not enough water pressure to keep the cold water flow running at enough pressure to keep the water flow cool enough for showering.

You have to upgrade your water pump to one that will run both the hot and cold flow together.

 

Reason for post is reading about another post on here re Fridges in the tropics not coping.

Seems forewarned is forearmed so if anyone is considering the endless water heater the water pump and water pressure part needs to be addressed too.

-- Edited by Yuglamron on Saturday 30th of November 2013 11:48:06 AM

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 You know I cant understand this one really.

For two years back in the late 70s, my wife and I rented a house that, every other week, was going to be sold and then not going to be sold. I got sick of it and bought a 38 foot van with shower and toilet and put it in my parents' back yard. Now remember this was late 70s. The water heater (cant remember the make) was close to the kitchen sink and served that and also the shower. When the hot water tap was turned down, it lowered the rate of flow through and that lowered the flame the tank produced. Could have been a Rheem but I wont put money on it. Later on we bought our first house and had only hot water over the bath which doubled as the shower. Wanting it in the kitchen we got a hot water tank, gas, put in. The hot water tank put in did the same thing as the caravan in that you reduce the hot water flow it reduced the flame. So, I thought all gas hot water did the same thing.

If this Yankee one isnt doing that then it is a disaster waiting to happen. Eg, if you turn the hot water on and then find no water is going through, does the flame stay on and blow the thing up?