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Timco Member Posts: 3,040
Some TL boilers have an internal bypass that keeps the boiler isolated from the system until it reaches 140*...Heats very well.

Just a guy running some pipes.


  • rick_29
    rick_29 Member Posts: 5

    have customer with gravity conversion.installer put in teledyne lars,problem low mass boiler with large volume in system. boiler and cicrc start when thermastat calls .the water temp never gets hot ,i was going to install triple aquast any suggestions going to repair supply piping 3 yrs old and looks like 10 .found btpass closed .opened bypass .
  • rick_29
    rick_29 Member Posts: 5

    no internal bypass .checked literature, with low return temp would that cause the pipe nipples coming out of boiler to be that detoriated, two short nipples steel with union to copper no dielectric union.
  • Tony_23
    Tony_23 Member Posts: 1,033

    should be piped primary/secondary at least. You could use a thermostatic union w/ bypass.

    The best way, IMO, would be variable speed injection w/ constant circulation on the system side.

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  • Mark Hunt
    Mark Hunt Member Posts: 4,909

    should be piped P/S. TL wants no more than a 25 degree delta T and if you go over that, strange noises eminate from the boiler.

    An old gtravity system is perfect for constant circ and VS injection on OD reset. Toss in some TRV's and I can't imagine a better system.

    Mark H

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