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  1. #1
    Join Date
    Aug 2012
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    Portland, Or
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    Setting head presure for WRV help

    Hey group

    Question what pressure should i set the WRV on a refrigeration system or shall i say what head pressure shoud i be shooting for on system? Any refrigerant. Whats temp/pressure is best for maximum effiency?

    I also ran across a sysytem with WRV on the inlet and valve is installed backwards (arrow the opposite direction)

    Thanks guys

  2. #2
    Join Date
    Oct 2011
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    Chicagoland Area
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    You need a PT chart
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  3. #3
    Join Date
    Aug 2012
    Location
    Portland, Or
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    123
    Hey group

    Should i be shooting for 90-100 degree condensing temp? Ya 2sac i'll see if i can locate a PT chart i think I've seen them some where

  4. #4
    Join Date
    Jan 2010
    Posts
    6,060
    [QUOTE=Iceman_pdx;14586791]Hey group

    Should i be shooting for 90-100 degree condensing temp?

    That would depend on which refrigerant you plan on using.

  5. #5
    Join Date
    Oct 2011
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    Chicagoland Area
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    There are some Tecumseh's where 130 degrees is your goal. You're head pressure range is no different than an air cooled unit. If it's an ice machine checking the mfg recomendations would be the best bet.
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  6. #6
    Join Date
    Jul 2007
    Location
    Mount Airy, MD
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    7,281
    Thread relocated to the refer section

  7. #7
    Join Date
    Jul 2000
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    Guayaquil EC
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    The industry's standard nominal rating point for water-cooled condensing units is 105F SCT, so set the WRV to the corresponding pressure for the refrigerant you're working with...so from the PT chart, for R22 it would be 210 psig. The same method applies for whatever the refrigerant is.

  8. #8
    Join Date
    Aug 2012
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    Portland, Or
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    Thanks icemeister

  9. #9
    Join Date
    Oct 2011
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    Quote Originally Posted by icemeister View Post
    The industry's standard nominal rating point for water-cooled condensing units is 105F SCT, so set the WRV to the corresponding pressure for the refrigerant you're working with...so from the PT chart, for R22 it would be 210 psig. The same method applies for whatever the refrigerant is.

    You took the fun out of letting him learn
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  10. #10
    Join Date
    Jul 2012
    Location
    Western KY
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    1,221
    Quote Originally Posted by icemeister View Post
    The industry's standard nominal rating point for water-cooled condensing units is 105ºF SCT, so set the WRV to the corresponding pressure for the refrigerant you're working with...so from the PT chart, for R22 it would be 210 psig. The same method applies for whatever the refrigerant is.
    Ya. What this guy said.

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