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FAN LIMIT CONTROL

RICK_22
RICK_22 Member Posts: 2
in THE MAIN WALL
wHAT SHOULD THE SETTINGS B FOR THE fAN CONTROL ON OIL FURNACE. I SET THE ON AT 150 AND OFF AT 110 AND LIMIT 200. ALSO ENCOUNTERD CALL EVERYTHING FROZEN IN OIL LINE UP TP NOZZLE, IS THEIR ANYTHING TO PUT IN TANK TO GET RID OF WATER.TANK WAS REAL LOW. ADDED 15 GAL OF KERO ,REPLACED FILTER AND NOZZLE AND FIRED UP /.

Comments

  • RICK_22
    RICK_22 Member Posts: 2


    wHAT SHOULD THE SETTINGS B FOR THE fAN CONTROL ON OIL FURNACE. I SET THE ON AT 150 AND OFF AT 110 AND LIMIT 200. ALSO ENCOUNTERD CALL EVERYTHING FROZEN IN OIL LINE UP TP NOZZLE, IS THEIR ANYTHING TO PUT IN TANK TO GET RID OF WATER.TANK WAS REAL LOW. ADDED 15 GAL OF KERO ,REPLACED FILTER AND NOZZLE AND FIRED UP /.
  • Gary_15
    Gary_15 Member Posts: 22


    I set them at 200 limit, 140 fan on, 110 fan off. That seems to work well. I took some training through the PA Petroleum Association a while back and they suggested those settings, but if your system has an oversized furnace or fan or short duct runs, set it at 170 limit, 130 on, 90 off. Undersized furnace or fan or long duct runs set at 230 limit, 160 on, 130 off. I have never set them different than the first settings I listed with no problems.
  • Firedragon_4
    Firedragon_4 Member Posts: 1,436
    Those setting should be fine,

    as to additives the trick is to start in October, not now! A dose with each delivery can save the customer beaucoup bucks and a lot of grief. IME, most are happy to do it once taught.

    As to products the trick is once you start stay within the same product line, don't make cocktails in the tanks. Personally I have always liked these and based on experience, JMO: http://lincolnlaboratory.com/additives.shtml
  • Unknown
    Unknown
    Why lower or raise the high

    limit temperature? The high limit on a warm air furnace should not be above 200 degrees. A better way is to determine temperature rise across the furnace and then determine CFM to be able to control duct temperature. A good rule of thumb is to never have the blower running with a supply duct temp below 100 degrees (F)

    Formula for CFM:


    CFM = BTUh's (OUTPUT)divided by 1.08 x CHANGE IN AIR TEMP

    EXAMPLE:

    CFM = 120,000 BTU's divided by 1.08 x (130*-60*F)

    CFM = 120,000 divided by 1.08 x 70

    CFM = 120,000 divided by 75.6 = 1587 CFM
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