SID circulators [RE-wrenches]

[Brad Bassett]

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I had a 3 watt ElCid in my SDHW system that made a ticking sound it's 
entire life of 10 years (still runs but not installed due to upgrade in 
collector size). I replaced every part that could be replaced and 
checked for anything that might be in there, it was totally clean, and 
no change. The sound was worse at slow speeds. My more recent El Cids, 6 
of them, make a whirring sound but no ticking. Now my float type check 
valves rattle a lot. After you've heard air in the fluid once, you can 
tell the difference between that and pump ticking.

Brad 


jeff wongstrom/sarah anderson wrote:
> 
> Hello wrenches,
> 
> I have installed five el-SID battery direct pumps; four in a hydronic
> heating system and one in a sdhw system.  The "virtually 
> silent""extremely
> quiet" pumps make ticking and rattling noises which are readily 
> amplified by
> mounting hardware and wood framing.
> 
> 
> One pump was sent back to the manufacturer for testing and declared a 
> normal
> healthy sounding quiet pump.
> 
> I did some static head testing  with vertical tubing and pump.  This 
> should
> have eliminated the possibilities of system air, cavitation, etc. as 
> this is
> how the manufacturer tests pumps.
> 
> I concluded that with room temperature glycol the pump is relatively 
> quiet,
> with pure water ticking noises are audible, with an increase in 
> temperature
> the ticking increases and becomes a rattling, when then attached to wood
> framing the noise is broadcast through the entire structure.
> 
> These conclusions do not seem to agree with other available info.
> 
> Any comments concerning similar experiences or suggestions appreciated.
> 
> Oscar
> Thirsty Lake Solar 
> 
>  
> 
>   
> 



Brad Bassett
AEE

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