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CONDENSATE RETURN PROBLEMS

W.MCKEE
W.MCKEE Member Posts: 3
in THE MAIN WALL
NEWLY INSTALLED MULTIPLE STEAM BOILER SYSTEM W/OUTDOOR
CONTROL APPROX. 2.6 MBH INPUT.VACUUM PUMP & RECEIVER
FEEDS NEW 120 GAL.DUPLEX BOILER FEED;ADDED TO MAINTAIN
WATER VOLUME OF OLD BOILERS.MAJORITY OF SYSTEM IS CI RADS
W/DANFOSS CONTROLS;SOME LARGE FIN-TUBE(ZONED) & STEAM
UNIT HEATERS.
BOILER FEED HAS FLOODED ON OCCASION;CONDENSATE RETURNS
AT IRREGULAR TIME INTERVALS.BEFORE SUGGESTING LARGER
TANK LOOKING FOR SUGGESTION ON IMPROVING CONDENSATE RE-
TURN.I BELIEVE TRAPS,VENTING,ZONING,ETC,IS TO BLAME.
SHOULD THE VENT ON THE VACUUM PUMP BE THE ONLY AIR VENT?
COULD THE DANFOSS/ZONE VALVES BE SLOWING RETURNS?
COULD BAD TRAPS BE THE PROBLEM?
COMMENTS /SUGGESTIONS WELCOME


SUGGESTIONS/COMMENTS WELCOME
R BOILER W/SOLENOID WATER
MAKE-UP VALVE OFF!! CONDENSATE

Comments

  • canuckDale
    canuckDale Member Posts: 77
    Condensate Storage

    Condensate tanks sometimes are undersized - by engineers and installers. Set back can make return slow, or fast.

    Had the same sort of problem recently. Engineers selection of duplex tank was small and shallow. Effectively reduced the capacity by half.

    A new tank would have worked. Working together we found another option. There was room in the two boilers to hold more water without comprimizing the waterline level. So we raised the LWCO settings. The system water has to be stored somewhere. So what if some of it's in the boiler. Caveat...as long as they can handle it.

    Worked on this one. Maybe work on yours?

    Dale
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