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oliver collins

  • Posts: 352
8lpm heating two reels
« on: December 13, 2015, 08:50:22 am »
Hi guys this afternoon I am going to try to get my heater to pull the water though with the pumps vacuum side, the water will b heated before it goes though the pumps have any of u guys tried it does it work or am I wasting my time ! It is for two hose reels by the way
Any ideas
Oliver rise n shine cleaning
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Smudger

  • Posts: 13459
Re: 8lpm heating two reels
« Reply #1 on: December 13, 2015, 10:24:04 am »
Dave Willis does it this way ( the only one I know of ) and works for him

Darran
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Never argue with an idiot, they will only bring you down to their level, and beat you with experience

windowswashed

  • Posts: 2626
Re: 8lpm heating two reels
« Reply #2 on: December 13, 2015, 11:59:45 am »
It knackers the pumps out a lot quicker than doing it the other way round, but don't take my word for it, just keep replacing them pumps and getting frustrated.  It's better the other way round after the pump.
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Smurf

  • Posts: 8538
Re: 8lpm heating two reels
« Reply #3 on: December 13, 2015, 02:10:04 pm »
Quote from: windowswashed on December 13, 2015, 11:59:45 am
It knackers the pumps out a lot quicker than doing it the other way round, but don't take my word for it, just keep replacing them pumps and getting frustrated.  It's better the other way round after the pump.

I could not get it to work on one pump let alone two  ;D
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Dave Willis

Re: 8lpm heating two reels
« Reply #4 on: December 13, 2015, 04:09:16 pm »
Yep, I 'pull' water through (one reel) works for me and doesn't knacker the pump - they are rated to take a pretty high temperature.

77 degrees centegrade - can't see me exceeding that somehow.

Get no pressure build up in the delicate internals of the heater. When I 'pushed' water through I blew the pressure relief valve several times when air got in the system and the pump kept building pressure. Not sure what the maximum pressure those heaters take but 100psi+ is a lot.
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oliver collins

  • Posts: 352
Re: 8lpm heating two reels
« Reply #5 on: December 13, 2015, 04:44:25 pm »
Will it work for two reels though ?
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Dave Willis

Re: 8lpm heating two reels
« Reply #6 on: December 13, 2015, 05:01:15 pm »
I have no idea, the flow would drop when two operators are running and increase with one or would it be the other way round with two pumps :-\. If it works when pushing I don't see why it would make any difference pulling. You're only moving water through a pipe after all.
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Smudger

  • Posts: 13459
Re: 8lpm heating two reels
« Reply #7 on: December 13, 2015, 05:12:16 pm »
I would have thought that 2 pumps after is an ideal setup - you will only need 1 heater then a tee piece after to feed each pump  flow should not be an issue same as its not an issue direct from the tank when splitting the flow ( heater can handle 8lpm ) you may get a heat spike as one pump shuts down and the flow through the heater slows but this should be minimal as the thermostat should look after this quite quickly and maybe a slight drop in temp. As a second pump starts up again should only be a small lag before thermostat balances it out

Darran
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Never argue with an idiot, they will only bring you down to their level, and beat you with experience

Smurf

  • Posts: 8538
Re: 8lpm heating two reels
« Reply #8 on: December 14, 2015, 11:05:49 am »
As those lpg water heaters are dirt cheap I would have thought best option for on demand use would be to run one heater for each reel surely?
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