View Poll Results: Am i right?

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  • Yes, you are correct. high side pressure on start up does not exceed the normal working high side pressure.

    48 82.76%

  • No, your friend is correct. high side pressure does skyrocket on the startup. (please post why, i would really like to know)

    10 17.24%
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  1. 13-11-2007, 12:52 PM #1
    paul_h's Avatar
    paul_h
    paul_h is offline VIP Poster I am starting to push the Mods: of RE
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    Re: please settle this debate

    Quote Originally Posted by mr cool View Post
    higher suction at start up = higher head pressure.
    This is pretty much it, when a unit starts it's going to be at it's highest suction pressure, which means the head pressure will be highest.
    I was working on a upright freezer yesterday. Ambient was 39C, but it was hotter than that due to all the other condensing units.
    After defrosting the coil (so the evap coil was warm), I couldn't get the damn thing running again. It kept on tripping out for some reason, while all the other freezers at -18 were cycling fine.
    So I had to increase HP cut out from 2600Kpa to 2800kpa just to get it started.
    edit: Nothing changed on the system, it was cycling fine, not tripping out the 2600kPa HP before I defrosted it.
    Last edited by paul_h; 13-11-2007 at 12:54 PM.
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