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  1. KweziV3

    Carrier HAP 4.2 Data entry problems

    Chris Thanks for the help. Just out of interest, We have the version without the little "a" at the end, and our suppliers forgot to update us with that version. I have found out that the version prior to yours (the one we have) is fraught with problems. But thanks for the help. Jakalas RSA
  2. KweziV3

    Carrier HAP 4.2 Data entry problems

    Hi We ave upgraded from CARRIER's HAP 4.06 to HAP4.22 and we are finding the following problems 1) When we enter a floor area for SPACE PROPERTIES > FLOORS > FLOOR AREA we cannot get it to save and use the entered floor area. If we close the relevant windows, and then re-open them, they revert...
  3. KweziV3

    Telephone Equipment Room Cooling

    Regarding the conversion of ratings from 80/67 to 70/60, I am assuming reference to wb/db temps in deg F. If this assumption is correct, can anybody explain what is incorrect about plotting the 2 points (two mentioned above) on a Psychomnetric chart, finding the difference in enthalpy (kJ/kg...
  4. KweziV3

    AHU smoke dampers

    Say Billy HEPA filtration as we all know, is defined by 99.97% removal of 3 micron particles and bigger. smoke is in the order of 0.01-1 microns. so your HEPA will not stop them getting to detector. But you do need to stop AHU produced smoke (i.e. That fan that blows), so HP side protection is...

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