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  • Users: gepman
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  1. gepman

    Generator Cannot Charge UPS

    We have a 60kW 120/208Y 3 phase generator connected to a UPS through a 4 pole ATS (see attached simplified one-line). The normal power to the UPS is through a 75kVA delta/wye transformer. The UPS is an Eaton (Cutler-Hammer) Powerware Blade 48kw unit with batteries and inverter. The UPS works...
  2. gepman

    Furnace Pilot Valve Timing (Honeywell S8610U)

    I am sitting in my house freezing while it is snowing and hailing outside. My furnace won't start. I have a Honeywell S8610U1003 ignition control unit. I have attached the installation manual for this unit. I am not a serviceman and I was wondering if anyone else had experience with this...
  3. gepman

    Carrier 30GB

    Does anyone know if the Carrier 30GB-075-650 (it is an reciprocating air-cooled chiller with three Carlyle compressors and six fans on the condenser) uses fixed condensing pressure or floating condensing pressure control? I ran into two units recently during an energy audit. No information...
  4. gepman

    Greenhouse PAR Lighting Requirements

    Does anyone know of any good references for PAR lighting requirements for different plants, photoperiod requirements for different plants, and general technical references on greenhouse lighting? I am particularly interested in edible plants. This isn't exactly my specialty!
  5. gepman

    Ventilation Requirements of Warehouse with LPG Forklifts

    I was asked to look at the energy consumption of a small (55,000 sq. ft) conditioned warehouse (72 deg. F) in a mild climate (Los Angeles Area). The warehouse has six 30 ton package units with economizers and exhaust dampers. What I don't understand is that it has twelve 42"x48" gravity hoods...
  6. gepman

    Performance Ratings of Sullair and Cyclops Refrigeration Compressors

    Does anyone have access to performance ratings tables (TR and BHP at various suction and discharge pressures) for the following compressors? I have searched the web and could not find anything. Sullair C20LA717-37 R717 Sullair 79DH12-0108 R22 Cyclops 5" bore x 5" stroke Cyclops 7.5" bore x...
  7. gepman

    Efficiency of worn screw compressors

    Does anyone have any published information or studies on the efficiency of heavily used (or worn out) refrigeration screw compressors? I would like to know some typical values. I need to calculate the efficiency on some existing old screw compressors. The only way that I can think of...

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