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TOPIC: Ciera 2855-1996 hot water heater

Ciera 2855-1996 hot water heater 19 Jun 2017 13:35 #1

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My Ciera has fresh water tank and a hot water heater. I purchased the boat knowing the heater didn't work. So I am looking for a little guidance, can anyone recommend which one would be a good replacement? Thanks for the help.

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Ciera 2855-1996 hot water heater 19 Jun 2017 14:40 #2

  • 706jim
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You may just need to replace the heater element. They are available at hardware stores for $20-$30 in various configurations. If the heater was turned on with no water in the tank, the element would fail very soon afterwards.
So try this before replacing the tank.

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Ciera 2855-1996 hot water heater 19 Jun 2017 15:01 #3

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Thanks for the help, I guess that would make perfect sense......i have done that on the house water heater, didn't occur the boat heater would be the same(idiot moment).

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Ciera 2855-1996 hot water heater 19 Jun 2017 15:09 #4

  • Fiftybucks
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I replaced mine with a west marine 6 gallon SS unit. I do agree with 706Jim that you can test the element and replace that part. You did not indicate if heater failed both connected to AC or also while engine was running. Installation went quickly. Re-seal any anchor screw holes made or reused during the installation. Fill those holes if you don't reuse the same mount points. Clip the ends of the hoses prior to hooking those up. While you have it out, hook up a tank bypass to use when winterizing. I preferred to use a commercial pipe thread compound on the fittings rather than teflon tape.

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cglazier - "Fiftybucks"
1995 2855 7.4 bravo II

Ciera 2855-1996 hot water heater 19 Jun 2017 15:50 #5

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The hot water tank if equiped with an internal heat exchanger should still provide hot water even with the element non functional. This assumes that the system has been plumbed to do so.

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
Last Edit: by builderdude.

Ciera 2855-1996 hot water heater 19 Jun 2017 23:54 #6

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Thanks for the help, I went by the boat to look it over. Is the element behind a panel? Here is what I see.

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Ciera 2855-1996 hot water heater 20 Jun 2017 00:00 #7

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Yes, the element is behind the removable panel at the water heater. There is also a reset behind the panel. FYI turn off the power at the boats AC breaker panel before working on the units electrical!!

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

Ciera 2855-1996 hot water heater 20 Jun 2017 14:00 #8

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Sam, cglazier makes a good point re; the winterizing by-pass-valve system.
This system allows the Water Heater to be drained and left empty, and not requiring the 6 or so gallons of RV antifreeze for freeze protection.
You can purchase a by-pass valve system, or easily make up your own.


Dave..... I appreciate your calling this a Water Heater! (inside joke)


And Sam...... if this water heater is a two-way unit ( i.e., electric and engine coolant), make sure that your engine coolant is plumbed correctly into the Water Heater's heat exchanger.
GM engine:
Supply = port in intake manifold prior to thermostat
Return = starboard port of engine circulating pump


.

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Rick E. Portland, Oregon
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Ciera 2855-1996 hot water heater 20 Jun 2017 16:28 #9

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2850Bounty wrote:

And Sam...... if this water heater is a two-way unit ( i.e., electric and engine coolant), make sure that your engine coolant is plumbed correctly into the Water Heater's heat exchanger.
GM engine:
Supply = port in intake manifold prior to thermostat
Return = starboard port of engine circulating pump

.

As far as the heater it self is concerned, there's no real in or out. The engine coolant just circulates though.

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Wet'ever
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Ciera 2855-1996 hot water heater 22 Jun 2017 16:21 #10

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I also have a 96 2855. However I recently went way over budget upgrading the motor. I am now running a stock 99 454 MPI fuel injection system as well as 496 stroker kit with EMI headers thru hull exhaust. The boat runs bitchen across the water now.
When I bought the boat the water heater had been removed. I bought a new water heater and installed it. I want to run the heat exchanger side of the heater. I do not have an enclosed cooling system. I don't have any water ports off of my intake before the thermostat. I have one line plumed off the exhaust manifold before the riser, and the return i have run to the engine water pump plug right by the main hose intake to this pump.
the problem I am coming up with is running it on the ear muffs up to temperature, I am getting a lot more water out of my exhaust on the plumed side. It appears the Bravo pump is pushing water threw the water heater and dumping in the exhaust giving me a steady stream on that side.
I have been looking for info on how to plum this. I have looked at all the pictures I can find. I can't find anything for MPI using the heat exchanger. Is there a specific flow direction in and out on the water heater? I haven't been able to find anything that tells me so. Any help would be appreciated. Thanks.

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Ciera 2855-1996 hot water heater 22 Jun 2017 16:57 #11

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Cmbrsum, the water heater doesn't care which way the coolant flows through it. There is a way to supply the water heaters heat exchanger from the top end of your mpi. If there is no visible extra port you may have to T into an existing one. You say your new engine is raw water cooled so there's likely a poosible port on the T stat but I can't confirm that as I'm unfamiliar with that raw water system (maybe remove the plastic and take a few pics of the intake manifold at/near the T stat area) The return from the water heaters heat exchanger will plumb into the engines cuculating pump similar to the pic this pic.

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
Last Edit: by builderdude.

Ciera 2855-1996 hot water heater 22 Jun 2017 17:05 #12

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Car2n wrote:

2850Bounty wrote:

And Sam...... if this water heater is a two-way unit ( i.e., electric and engine coolant), make sure that your engine coolant is plumbed correctly into the Water Heater's heat exchanger.
GM engine:
Supply = port in intake manifold prior to thermostat
Return = starboard port of engine circulating pump

.

As far as the heater it self is concerned, there's no real in or out.
Understood, and I have mentioned this many times here on the BOC.

The engine coolant just circulates though.
Yes, that is true.
However, what I was addressing was the importance of where the "Supply" would be taken from, and where the "Return" would make it's way back into the engine cooling system!
If the supply/return is NOT correct, the system becomes Un-Balanced and will not perform to it's potential.

Take a look at my schematic that Dave has just posted.
This is how you will want to configure your Supply and Return.
Supply = up-stream from the thermostat! This will be under mild Positive Pressure.
Return = the stbd most port on the Engine Circulating pump! This will be under mild Negative Pressure.
This creates the necessary balance!

No balance...... and your system will not perform well!

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Rick E. Portland, Oregon
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Twin 270 HP 5.7's w/ Closed Cooling
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Last Edit: by 2850Bounty.

Ciera 2855-1996 hot water heater 22 Jun 2017 17:25 #13

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Cmbrsum wrote: I also have a 96 2855. However I recently went way over budget upgrading the motor. I am now running a stock 99 454 MPI fuel injection system as well as 496 stroker kit with EMI headers thru hull exhaust. The boat runs bitchen across the water now.
When I bought the boat the water heater had been removed. I bought a new water heater and installed it. I want to run the heat exchanger side of the heater. I do not have an enclosed cooling system. I don't have any water ports off of my intake before the thermostat. I have one line plumed off the exhaust manifold before the riser, and the return i have run to the engine water pump plug right by the main hose intake to this pump.
the problem I am coming up with is running it on the ear muffs up to temperature, I am getting a lot more water out of my exhaust on the plumed side. It appears the Bravo pump is pushing water threw the water heater and dumping in the exhaust giving me a steady stream on that side.
I have been looking for info on how to plum this. I have looked at all the pictures I can find. I can't find anything for MPI using the heat exchanger. Is there a specific flow direction in and out on the water heater? I haven't been able to find anything that tells me so. Any help would be appreciated. Thanks.


That 496 HO really deserves a full closed cooling system.
Hot water supply port is usually located at the THERMOSTAT HOUSING.
Post a pic of yours.

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Ciera 2855-1996 hot water heater 22 Jun 2017 18:22 #14

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Hot water supply port is usually located at the THERMOSTAT HOUSING.


This should be a port within the coolant flow that is prior to the actual thermostat location.
The thermostat is what holds back coolant creating the necessary mild Positive Pressure created by the Circ pump.

.

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Rick E. Portland, Oregon
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Twin 270 HP 5.7's w/ Closed Cooling
Volvo Penta DuoProp Drives
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Ciera 2855-1996 hot water heater 24 Jun 2017 17:52 #15

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Rick, remember we talked about this already while back...

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Joon, Kathy, Jaden & Tristan
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Longbranch WA
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Ciera 2855-1996 hot water heater 24 Jun 2017 20:41 #16

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I remember it, you posted a diagram of it. If I recall correctly it was a 3/8 fitting in the t stat housing that would allow coolant flow from just underneath the t stat. Me thinks :silly:

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
Last Edit: by builderdude.

Ciera 2855-1996 hot water heater 24 Jun 2017 22:27 #17

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samm835 wrote: Thanks for the help, I went by the boat to look it over. Is the element behind a panel? Here is what I see.


I searched for and downloaded a bunch of online manuals for equipment aboard my 2556 when I bought it. Here's the installation manual for the Atwood EHM6.

www.atwoodmobile.com/manuals/waterheater...%20PS%2011.19.07.pdf


builderdude wrote: Cmbrsum, the water heater doesn't care which way the coolant flows through it.

Since the required temperature for hot tap water is a lot lower than the coolant temperature, they probably went with a simpler design which doesn't try to set up counter-current flow. So the direction of coolant flow doesn't matter here (the above manual doesn't specify an inlet and outlet). But just be aware that heat exchangers in general do have a preferred direction of flow which maximizes the amount of heat transferred.

en.wikipedia.org/wiki/Countercurrent_exc...nt_flow_exchange.jpg

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Ciera 2855-1996 hot water heater 28 Jun 2017 15:54 #18

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builderdude wrote: I remember it, you posted a diagram of it. If I recall correctly it was a 3/8 fitting in the t stat housing that would allow coolant flow from just underneath the t stat. Me thinks :silly:


Yes I did

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Joon, Kathy, Jaden & Tristan
93 3058
92 2855
91 Fourwinns 205
Longbranch WA
Life is Good
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