hVac controls guide for Plans examiners and Building inspectors
hVac controls guide for Plans examiners and Building inspectors hVac controls guide for Plans examiners and Building inspectors
Figure 34: Mechanical schedule showing cooling tower fans equipped with VSDCOOLING TOWERSymbolLocation ServedCT-1ChillerHeat Rejection Tons 800Type Cells 1DischargeVerticalFluid EWT (°F) 90LWT (°F) 77Flow (GPM) 1,500Ambient (°F) 67Nozzle (ft WG) 4FluidWaterFan Type AxialNumber 1Air flow (CFM) 170,000Motor HP 25ControlVFDVoltage/Phase 460/3Basin Heater Number 1Capacity 12Voltage/Phase 460/3Pipe Connections Supply (in) 10Return (in) 14Make-up (in) 2Drain (in)1 ½Overflow (in) 3Weight LBS 31,000Basis of Design Manufacturer ABC IncModelModel XYZNotesFigure 35: Sample note on mechanical scheduleNOTE: Cooling tower fan VFD modulates speed to maintain condensing water temperature setpoint.Control Requirements for Complex Systems 41
- Page 2 and 3: ContentsIntroduction ..............
- Page 5 and 6: Commercial buildingControl requirem
- Page 7 and 8: Prescriptive requirementsfor Comple
- Page 9 and 10: Code Requirements andCompliance Che
- Page 11 and 12: Control Requirements for All System
- Page 13 and 14: Figure 4: Sample control sequence s
- Page 15 and 16: d) Automatic setback and shutdown c
- Page 17 and 18: Figure 9: VSD installed on a supply
- Page 19 and 20: Figure 13: Motorized damperFigure 1
- Page 21 and 22: Building InspectionSuggested Compli
- Page 23 and 24: 4) The supply of outside air is red
- Page 25 and 26: ) Control strategyEconomizers must
- Page 27 and 28: 4) The supply of outside air is red
- Page 29 and 30: must be positioned well down the du
- Page 31 and 32: Figure 23: BAS screen shot indicati
- Page 33 and 34: Code SectionsIECCASHRAE2009: NA 200
- Page 35 and 36: Figure 27: Illustrated control sequ
- Page 37 and 38: Code SectionsIECCASHRAE2009: 503.4.
- Page 39: Building InspectionSuggested Compli
- Page 43 and 44: • Dual duct VAV systems should mi
- Page 45 and 46: Code SectionsIECCASHRAE2009: NA 200
Figure 34: Mechanical schedule showing cooling tower fans equipped with VSDCOOLING TOWERSymbolLocation ServedCT-1ChillerHeat Rejection Tons 800Type Cells 1DischargeVerticalFluid EWT (°F) 90LWT (°F) 77Flow (GPM) 1,500Ambient (°F) 67Nozzle (ft WG) 4FluidWaterFan Type AxialNumber 1Air flow (CFM) 170,000Motor HP 25ControlVFDVoltage/Phase 460/3Basin Heater Number 1Capacity 12Voltage/Phase 460/3Pipe Connections Supply (in) 10Return (in) 14Make-up (in) 2Drain (in)1 ½Overflow (in) 3Weight LBS 31,000Basis of Design Manufacturer ABC IncModelModel XYZNotesFigure 35: Sample note on mechanical scheduleNOTE: Cooling tower fan VFD modulates speed to maintain condensing water temperature setpoint.Control Requirements <strong>for</strong> Complex Systems 41
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