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  1. freonjohn

    air exchanges

    forgot to mention -- outside air into return plenum is 300 cfm
  2. freonjohn

    air exchanges

    We are currently replacing/modifing a/c equipment for an operating room. The O.R room is fed by an ahu. there are 2 return ducts in the O.R. room and 1 outside air duct that is tied into the return plenum. The engineer who designed the job wants the following air exchanges min. changes outdoor...
  3. freonjohn

    condenser flow problems

    All readings have been checked with one gauge to avoid inaccuracies.
  4. freonjohn

    condenser flow problems

    I have a 30 hp condenser water pump(Taco) serving a trane 650 ton centrifugal chiller. The pump is located 1.5 feet below the sump of the cooling tower. I was called to perform start-up on the pump and set the gpm. The design for the condenser is 1800 gpm at 51 ft. head and 8 psi pressure drop...
  5. freonjohn

    carrier 30gxn160 screw chiller

    having problems with circuit b economizer on carrier screw chiller. if anyone familar would like to have an in depth conversation for possible problems. thanks

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