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From: Sea Quell crew. (no email)
Date: Thu Nov 03 2005 - 21:35:29 EST
Thanks Arild.
In general the heater cores are higher than the runs between, except
where the boat layout disallows. So there are two areas where the hose
run makes a high spot, and I can understand why they did that.
Yes the pump is not at a low point. So that is probably the problem. It
is mounted higher than the burner, which is not the way the manual says
to do it.. I'll research why they did that, and will move it down if I can.
The heater worked well until I replaced the hose at the pump area.
Thanks for the dinghy bailer pump idea, that may be what I end up doing..
-Neal.
Arild Jensen wrote:
> Neal asked:
>
> -----Original Message-----
> What's the most effective and convenient way to prime 100 foot of hose
> that is routed through the boat?
>
> I have some air in the hoses. I suspect there is air trapped at the pump
> area. So the pump is not moving the fluid.
>
>
> This hose obviously is not level, it goes through cabinets, so there are
>
> low and high levels throughout the boat.. Towards the end of the hose
> loop is an expansion tank that does allow air to bubble out of the
> system. Also, some of the heater registers (fan units) do have bleeding
> nozzles.
>
>
> REPLY
> The circulating pump is a non contact impeller type.
> If the bleeder valves at the heat registers do not allow you to bleed
> the whole system then use a displacement pump, even one of the dinghy
> bailer pumps fitted with hose barbs. The drill motor mounted pumps are
> also effective since they also have a positive seal- vane to case.
>
> Evidently the original installer failed to observe proper orientation
> and slope of the various units. Normally you should leave the heater
> cores as the high points and the hoses drooping in between. That way you
> know the bleeder valves constitute the high points and after bleeding
> these the whole system is pretty well primed and ready to go.
> Unless the pump is mounted as a high point it likely isn't the location
> of the air lock. Been there done that, more than a few times.
>
> Arild
>
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