SID circulators [RE-wrenches]

[Dean T. Newberry]

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Hi Tom,
We regularly use Propylene Glycol in these circuits, I never bothered to 
ask the tank manufacturer, I'll do it.

cul  deant

Tom Lane, Energy Conservation Services wrote:

> 
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>Reply good site however no mention of glycol compatibility of the expansion
>tanks like AMTROL or    SPARCO  I might have overlooked it   Gator Tom
>----- Original Message -----=20
>From: "Dean T. Newberry" <deant at dcn.org>
>To: <RE-wrenches at topica.com>
>Sent: Tuesday, July 13, 2004 9:33 PM
>Subject: Re: SID circulators [RE-wrenches]
>
>
>
>
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>  Hi Tom,
>Whatever fluid you may be using, did you size and precharge the
>expansion tank correctly?
>For Expansion Tank sizing go to http://www.flexconind.com/
>For Tank pressure, determine the correct system pressure, with the
>system unpressurised and ventilated, precharge the expansion tank to the
>design pressure, then fill, purge and pressurize the system.
>Typical design pressure is height of system in feet above expansion tank
>divided by 2 plus 15. where 15 lbs is the design pressure to minimize
>cavitation in the system. To be more precise, Precharge in PSI =3D (.5*H')
>+ 15.
>An over or under charged expansion tank will not maintain optimal system
>pressure.
>
>Manuals, Training and Industry guidlines available at the RPA
>http://www.radiantpanelassociation.org/
>
>
>
>
>Tom Lane, Energy Conservation Services wrote:
>
>  
>
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>>
>>Also if you are running glycol what is the system pressure and the charge
>>you put on the expansion tank and what is the collector area -the pipe=
>>    
>>
> size
>  
>
>>and height of the collectors above the tank   gator tom
>>----- Original Message -----=20
>>From: "Jay Peltz, Peltz Power" <jay at asis.com>
>>To: <RE-wrenches at topica.com>
>>Sent: Monday, July 12, 2004 6:29 PM
>>Subject: Re: SID circulators [RE-wrenches]
>>
>>
>>
>>
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>>
>>Hi Jeff,
>>
>>Curious if you are using the pumps connected to copper pipe or plastic?
>>
>>Have you tried any rubber isolation techniques?
>>
>>jay
>>
>>Peltz Power
>>
>>
>>    
>>
>>>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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