SID circulators [RE-wrenches]

[Allan Sindelar]

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Use bottled or distilled water if your local water is highly mineralized;
iron will gather around the armature shaft and eventually slow or stop the
impeller; could also make it noisy. I haven't heard the noises you describe.
Allan @+E

> 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

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