OPERATIONS & MAINTENANCE MANUAL - McCormick PCS Info

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MAINTENANCE MANAGEMENTOPERATIONS & MAINTENANCE MANUALC • 2/Page 7 of 8No. C • 2Overtime HVACEvaporation Rate = 1% of GPM rateNumber of Pumps: 1Total Pump GPM Rate: 900Bleed Cycles = (Egpm/C-1) 4 cyclesTotal Make-up = Rate + CyclesHourly Evaporation rate = E rate x 60 min.Number 1 Load Tonnage x Hourly E rate = Make-up rateMake-up Rate x $.0038= .35% Ton= 900 PGPM= 9 1% Rt= 3 CGPM= 12 TMup= 720 HMup= 252 LMup=$0.96 PrhrStep Three -- Equipment DepreciationEquipment CostEstimated Life x Annual Run Time= Depreciation Cost$475,000 = $4.3530 x 3,640Step Four -- Equipment Maintenance CostMaintenance Costs: annual operating hours = Equipment Maintenance Costs$12,550 : 3,640 = $3.45Step Five -- Totals CalculationA. Condition #1 -- Minimum Load (4 AHUs):1. Total Electrical Costs -- Condition #1 -- 214 KW x $.065 = $13.912. Total Water Costs -- Condition #1 -- 216 x $.0038 = $.823. Equipment Depreciation = $4.354. Equipment Maintenance = $3.45Subtotal Hourly Cost --Condition #1 $22.53© 1992 - 1997, Michael Robert McCormickAll Rights Reserved
MAINTENANCE MANAGEMENTOPERATIONS & MAINTENANCE MANUALC • 2/Page 8 of 8No. C • 2Overtime HVACOverhead = + 20% 4.50Total$27.03 /hrB. Conditions #2 -- Other Load (5 AHUs):Carry out the totals calculations for however many “conditions” you used in the waterchilling unit, air handling unit and water cost calculations.© 1992 - 1997, Michael Robert McCormickAll Rights Reserved
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