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
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Plan ReviewSuggested Compliance Check(s):• Review the fan schedule to see that large fans (5 hp <strong>and</strong> larger) arespecified with variable speed drives or two speed motors.Figure 8: Fan schedule indicating VSD to be providedFAN scheduleID Area Type Drive CFMT.S.P.(in H 2O)Basis ofDesignMax Wt.(lbs)Volt/PhElectricalHPControlPF-1 Stair UtilitysetPF-4 Elevator UtilitysetSF-1 Office VaneaxialRF-1 AHU-1 VaneaxialBelt 8000 0.5 400 480/3 7.5 VFDBelt 10000 0.5 400 480/3 7.5 VFDBelt 35000 200 480/3 40 VFDBelt 20000 200 480/3 25 VFD<strong>Building</strong> InspectionSuggested Compliance Check(s):• Verify that supply fans with motors greater or equal to 5 hp have been provided with VSDs (orother speed control devices) as indicated on the mechanical plans. Supply fans may be locatedon rooftops (simple systems) or mechanical rooms (complex systems) (figure 9). A buildingautomation system (BAS) may also show where equipment is controlled by a VSD (figure 10).16 Control Requirements <strong>for</strong> All Systems
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