Taco SR503 odd issue

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  #1  
Old 01-06-18, 10:32 AM
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Taco SR503 odd issue

Hi all. I have a two year old complete heating system oil fired hydronic heat (Air handler (1 zone), Two baseboards (2 other zones). Taco SR503 with three zones attached with three circulators.

The system runs great except for about once a week, the circulators will not come on. I look at the Taco and the zones are lit up but they are not turning on the circulators. I turn the system off via switch and turn it back on an the system resets and works properly again.

Could it be a bad relay or electrical component within the Taco ?
 
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Last edited by neekos; 01-06-18 at 10:53 AM.
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Old 01-06-18, 10:57 AM
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Here is a picture of the Taco. As i said, it has and is working great, just the oddity I mention.

Also, Hydrostat Fuel Smart hi setting set at 165.
 
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Old 01-19-18, 03:25 PM
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No one ? I guess it's a peculiar problem.
 
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Old 01-19-18, 09:08 PM
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Depending on how it's wired.... the Hydosmart can keep the circulators from running until a certain temperature is reached. I doubt it's the Taco controller.

I need a well lit picture of the inside of the Taco controller.... hydrosmart too if possible.... and model number for the hydrosmart.
 
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