As I read just above - your effectively heating the OB with the coal fired appliance -- bravo!!! that is very simple and effective - not the most efficient but very good
ok --- on to the drama
1975gt750 wrote:my first question is I have a coal boiler in series with my oil burner. I have 4 circulators for my heat zone and I also installed a grundfos circulator between the coal boiler and oil burner to help with water flow between the two. I see the grundros circulator has a check valve in it. if my dump zone comes on and if the grundros circulator is not on will the dump zone circulator pull the water through the circulator with the check valve?
no --- you need to make the circulation between the two appliances your dump zone mule - if that pump doesn't run - the zone circulators on the OB will not pull energy out of the Coal Boiler - unless you have incorrectly described - or I have misunderstood you system
1975gt750 wrote:or should I remove the check valve?
should make no difference - again without a clear intimate knowledge of the system -- "It depends"
1975gt750 wrote: my second question is on a taco007 circulator can i just change out the motor or do I have to replace the whole circulator? motor went bad and I don't want to have to drain the whole system.
Sometimes they are still available and sometimes the generation has been obsoleted and you have to renew the whole thing -- take the model and serial number to your supplier and ask! BTW -0----not to pick but... this is why you need isolation valves on these parts