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Old 09-24-2010, 03:34 PM   #1
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Accumulator tank

I have been parked for six weeks in a location where I'm using the onboard freshwater tank.

The pump cycles more than it did when I first parked.

Is there an accumulator tank that should have air in it? Where is it located? Is it a bladder type tank that should not become waterlogged? If not what is the best way to get the air/water balance restored?
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Old 09-24-2010, 03:54 PM   #2
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there is no accumulator tank on these modern units,

unless installed as aftermarket.

IF the pump is cycling at ALL, there is a leak somewhere.

this leak could be ANY place in the pressurized system...

from the external hose/faucet to any internal fixture/pipe/joint and so on...

could be at the water pump or at the water heater too.

for example IF the water heater is left ON and the pump is ON,

the pressure/temp relief valve on the tank will burp/drip occasionally.

this is almost a routine finding IF the water heater is on 24/7.

and the pump will cycle to restore the crucible water...

leading to a routine of 'drip/fill/heat/drip'

but ANY thing in the freshwater circuitry could be leaking...

filters, pump prescreen, pipes, joints, back flow valves, shower, plumbing, toilet and so on.
_______

i have not seen an acceptable "minimum" referenced for pump cycling...

but if the water pump cycles more that 2-3 times in a 24 hour period

the search for an open source begins.

cheers
2air'
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Old 09-24-2010, 04:04 PM   #3
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2air, my post was less than clear.

The pump stays off when it is supposed to be off.

The difficulty is that the pump turns on and off 4-5 times in the course of, say, rinsing out the coffee thermos with hot water. It has not always done this. It used to stay on as long as the faucet was open.
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Old 09-24-2010, 04:13 PM   #4
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Quote:
Originally Posted by Jammer View Post
2air, my post was less than clear.

The pump stays off when it is supposed to be off.

The difficulty is that the pump turns on and off 4-5 times in the course of, say, rinsing out the coffee thermos with hot water. It has not always done this. It used to stay on as long as the faucet was open.
Ours cycles on and off if the faucet is only partially open. I think that is normal. If you have the faucet fully open, I would look for some sort of obstruction either in the faucet or between the pump and faucet.

Ken
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Old 09-24-2010, 04:20 PM   #5
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gotcha

all those wasted key strokes, oh well.

as ken sez this is normal, in part because there is NO accumulator tank.

and since the pump isn't variable speed running is essentially full ON or off.

IF there is a tiny bit 2 much air in the PREscreen

the intermittent cycling during USE, is more common.

there is a tiny adjustment screw (allen head?) on the underside of the pump and it can be tweaked a bit...

some folks INSTALL small/hard accumulator tanks to reduce the pump effect...

and there are threads on doing that too.

cheers
2air'
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