SID circulators [RE-wrenches]

[Matt Tritt]

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Do you have an air relief valve in the system or did you do a thorough
purge? It sure sounds like air bubbles to me.

I recently had a similar pump fail in a Heliotrope PV powered DHW system,
but it didn't make a peep.

Matt T

-----Original Message-----
From: Jeff Wongstrom [mailto:thirstylake at interbel.net] 
Sent: Monday, July 12, 2004 9:22 AM
To: RE-wrenches at topica.com
Subject: SID circulators [RE-wrenches]


 

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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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