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Capt T
#1 Posted : Saturday, May 08, 2010 1:37:05 PM(UTC)
Capt T

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Brick wall Okay here is a Odd problem. Fresh water pump runs great for the hot water side of all faucets including shower. As soon as you turn the cold water side of faucets on ( regardless of weather or not the hot water is on) the pump starts running erratic and eventually trips the circuit breaker. Like I said only happens when you run the cold side of all faucets. No air bubbles in lines, we cleaned and inspected all the lines even replaced a bad faucet. Water pump is a Par max 4.3 gph. Not sure where to look next.Think I don't believe its the pump, brand new and plus it runs fine from the hot water side. I was going to check the switch and or circuit breaker to see if it was bad but i don't believe it is because I would think it would trip no matter what water hot or cold is running.
1978 Aft Cabin
Twin Chrysler 440's
Fox Road Marina

My Father once told me "if you ever need a helping hand, just look to the end of your arm!"
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cap'n Brent
#2 Posted : Saturday, May 08, 2010 8:32:11 PM(UTC)
cap'n Brent

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my hot water tank was gone when i got my boat so im not shure how a factory system works mine has a shirwood pump but it sounds like pump may have pressure switch cold is free flowing hot has resistance if pump has hi or low pressure switch that makes sence as a guess
HP Chadwick bay Sunset Bay lake Erie NY boat name Sunrise 32' f/b fisherman chry 318 twin blue bastards,28'express singel 318
"It would be a labor of love, if I loved to labor" cpt Brent
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Doug Doty
#3 Posted : Tuesday, May 11, 2010 2:44:32 PM(UTC)
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My hats off to Brent for even coming up with a theory, try bypassing the pressure switch for a cycle and see if it is causing the problem.
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1984 39 Marinette sedan, " LIBERTY ONE "
440'S 19x22 wheels, 710 HOURS
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jralbert
#4 Posted : Tuesday, May 11, 2010 4:31:05 PM(UTC)
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The HW tank acts as an accumulator does/should on the CW side... builds up pressure which evens out the flow. It is typical that the pumps runs only sporadically on the HW side...but much more frequently on the CW side. My pump (don't recall the brand) has an adjustment screw on the CW output side. Instructions say to turn it if the pump keeps cycling on at short intervals. I added an accumulator (an air bladder) to smooth out the pressure flow and vibration - it helped a lot
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD
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Capt T
#5 Posted : Friday, May 14, 2010 11:50:48 AM(UTC)
Capt T

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Thanks guy's the accumulator tank was thought of just not sure if it would solve the problem may try that on Monday. Shurflow says to try and swap pump (still not convinced it is in the pump).
1978 Aft Cabin
Twin Chrysler 440's
Fox Road Marina

My Father once told me "if you ever need a helping hand, just look to the end of your arm!"
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jralbert
#6 Posted : Friday, May 14, 2010 12:47:20 PM(UTC)
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Check your manual to see if the pump has the same type of adjustment I described above to reduce cycling. One thing that will help is to run the CW slowly. But you will get tired of that quickly.
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD
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jimski2
#7 Posted : Friday, May 14, 2010 11:04:37 PM(UTC)
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My take on this is the pump feeds the water lines to the hot water tank and the cold water lines. When the hot and cold lines are opened together or just the cold water lines are opened, the pump is starving for water because of an undersized feed line or it is pumping too much water and trips the breaker. Maybe a control valve on the discharge side of the pump will limit the water flow. There may be a restriction in the feed line to the pump or the valve is not fully opened. 2 cents.
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Capt T
#8 Posted : Saturday, May 15, 2010 3:57:45 AM(UTC)
Capt T

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No such adjustment on this particular pump already checked. Jimski, I believe the accumulator tank will act the same as a pressure valve. Not sure but we are going to try that on Monday.Pray
1978 Aft Cabin
Twin Chrysler 440's
Fox Road Marina

My Father once told me "if you ever need a helping hand, just look to the end of your arm!"
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cap'n Brent
#9 Posted : Sunday, May 30, 2010 7:08:21 PM(UTC)
cap'n Brent

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How did you make out on hot water delema
HP Chadwick bay Sunset Bay lake Erie NY boat name Sunrise 32' f/b fisherman chry 318 twin blue bastards,28'express singel 318
"It would be a labor of love, if I loved to labor" cpt Brent
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Capt T
#10 Posted : Monday, May 31, 2010 1:40:35 AM(UTC)
Capt T

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Thanks for asking Brent. No luck as of yet, I think we are going to replace some lines and see if this cures it. It seems to be one of those gremlins that just pop up outta no where. we have replaced water pump, faucets, check valves in the hot water tank. we even flushed the lines with high pressure water.Brick wall
1978 Aft Cabin
Twin Chrysler 440's
Fox Road Marina

My Father once told me "if you ever need a helping hand, just look to the end of your arm!"
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Barkleydave
#11 Posted : Monday, May 31, 2010 4:43:35 AM(UTC)
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I had a simular problem a few years ago.

My solution was unexpected.. I removed the cap for the dock water connection and water was leaking out. I discovered the check valve was not working and allowing water/pressure to back up through the dock h20 connection. I found one on line replaced and my problem was solved. The check valve is located directly below the deck connection on the water line.

1987 29 FB Sedan


safe boating,

dave
None
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Capt T
#12 Posted : Monday, May 31, 2010 10:04:28 AM(UTC)
Capt T

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Thanks Dave never thought about that check valve. Will check that one out tomorrow, maybe just maybe that will solve it.Pray
1978 Aft Cabin
Twin Chrysler 440's
Fox Road Marina

My Father once told me "if you ever need a helping hand, just look to the end of your arm!"
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