Boiler Question

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Old 11-03-02, 03:45 PM
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Water temp

I have a Burnham oil fired furnace, about 20 yrs old, with a forced hot water system. The Honeywell triple aquastat has 2 temperature settings, high and low. Mine is set to 160 degrees F. high, 140 low. The temperature guage on the face of the furnace reads 200 degrees. Which is right? What should the correct settings be?
 
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Old 11-04-02, 08:38 PM
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The temperature guage tells the temperature of the water in the boiler. The low setting is for the pump. The pump won't come on unitl the temperature of the water is 140 degrees. The high setting is for the burner, meaning to say once the water temperature reaches 160 degrees, the burners goes off but the pump can still run if there is a demand for heat.

So the temperature of the water at these settings should not go above 160 degrees or a little bit more than that. But certainly not to 200 degrees. The thermostat may be off or the Hi/Lo switch. In either case, I would recommend you call a service person to check it out.
 
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