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modine heaters

or a "day tank" which stores some oil up there?

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  • modine heaters

    we have a 100' long greenhouse tied into a 4 car garage, a 1000 gal tank is buried by garage,, a lift pump is used to pull oil up to ceiling of garage, oil then flows from lift tank pump to [2] 1/2 id blk pipes traveling 165 feet to rear of green house and to [2] modine heaters. problem is units run then get air bound the run again, we had a little time today to put gauges on vacumn is 6in but air bubbles keep showing up in clear lines of test gauge. tomorrow we will go back to pressure check lines, my question is would a tiger loop be recommended instead of a long return line and lots of valves and fittings?
  • Weezbo
    Weezbo Member Posts: 6,232
    osv .

    you can pump oil with supply and returnlines or you can have a pump that is piped to basically run oil around in circles and push oil to the osv or you can pipe large and pick up and return in a single pipe ....there is an old oil (oil air seperator , looks like a heavy pinner maidomist.)high point air seporator i have used. you can single pipe individual tiger loops with osv buh that doesnt eliminate the cause, just masks it.
  • Ed N.Y.C.
    Ed N.Y.C. Member Posts: 73

    Mike, Witha run of 165' I would think that 1/2 " pipe would be way to small. I would run 1" lines and tee of at burners with 1/2". You already have a vacuum of 6" on a basically gravity run job. If you think your vacuum is high now, wait till you run a return line,not to mention more chance of leaks. Hope this helps ED N.Y.C.
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