Oil Boiler overheating 2nd floor


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Old 11-09-10, 06:39 PM
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Oil Boiler overheating 2nd floor

Thermostat set at 50 and temp rises on 2nd floor to 85. We have a 2 zone system, 2 circulating pumps. 1st room in zone is 80, last room in zone is 60. Thermostat's were replaced & didnt help. non electric flow control valves. Any help with this would be great!
 
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Old 11-09-10, 07:09 PM
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Presuming the circulating pump is not running, it sounds like you have a stuck flow control valve allowing thermal migration of the water. Sometimes (not often) a firm rap with a hammer on the side of the valve will free it up. Another thing which may help is to open the valve manually, turn the circulator on for a few minutes, return the valve to it's normal position then turn off the circ. If these quick fixes fail, you are going to have to either take the valve apart & clean it or replace the valve.
 
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Old 11-10-10, 05:06 PM
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thanks for the advice.... i turned the valve manually and it started to leak, is this also an indication of a bad valve? Thanks
 
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Old 11-10-10, 05:51 PM
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Leak

It's probably just the packing. There should be a hex below where you opened the valve manually. Try tightening the hex. It should stop the leak.
 
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Old 11-10-10, 06:54 PM
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If the flo-control valve is leaking past the check and, also around the packing, I would replace it. They get limed up after a number of years.
 
 

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