5700 23RD DR W 2017 Plans 2022-10-27 (5)

� 9. Allowable fan motor horsepower shall not exceed cooling loads greater than 5 watts/ftZ shall be ■ a 90%of the allowable HVAC fan system bhp provided with separate,independent HVAC : t� n (Option 2)as defined by Section C403.2.11.1. systems to allow the VAV air handlers to turn off o � 10. All fan powered VAV terminal units(series or during unoccupied hours in the office space and to 0 : parallel)shall be provided with electronically allow the supply air temperature reset to occur. o : commutated motors.The DDC system shall be Exception: The VAV air handling unit and : : configured to vary the speed of the motor as a VAV terminal units may be used for secondary : : function of the heating and cooling load in the backup cooling when there is a failure of the o : space.Minimum speed shall not be greater than 66 primary HVAC system. e : percent of design airflow required fbr the greater of Additionally,server rooms,electronic equipment : : heating or cooling operation.Minimum speed shall rooms,telecom rooms,or other similar spaces shall 0 o be used during periods of low heating and cooling be provided with airside economizer per Section e 0 operation and ventilation-only operation. 403.3 without using the exceptions to Section a : Exception: For series fan powered terminal C4033. e : units where the volume ofprimary air required to Exception:Heat recovery per exception 9 of : : deliver the ventilation requirements at minimum Section 403.3 may be in lieu of airside : : speed exceeds the air that would be delivered at economizer for the separate,independent HVAC : : the speed defined above,the minimum speed system. : � setpoint shall be configured to exceed the value 15. HVAC system central heating or cooling plant will � ■ required to provide the required ventilation air. include a minimum of one of the fbllowing . � 11. Fan-powered VAV terminal units shall only be options: : : permitted at perimeter zones with an envelope 15.1. VAV terminal units with hydronic heating : : heating load requirement.All other VAV terminal coils connected to systems with hot water : : units shall be single duct terminal units. generation equipment limited to the : � 12. When in occupied heating or in occupied deadband fbllowing types of equipment: gas-fired o � between heating and cooling all fan powered VAV hydronic boilers with a thermal ' : terminal units shall be configured to reset the efficiency,Et,of not less than 90 percent, ; : primary air supply setpoint,based on the VAV air air-to-water heat pumps or heat recovery : : handling unit outdoor air vent fr•action,to the chillers. : � ; minimum ventilation airfl.ow required per 15.2. Chilled water VAV air handing units : : International�Lfechanical Code without utilizing connected to systems with chilled water e : exceptions 2,3,or 4 of Section C403.4.4. generation equipment with IPLV values : % 13. Spaces that are larger than 150 square feet(14 m2) more than 25 percent higher than the : : and with an occupant load greater than or equal to minimum part load efficiencies listed in : : 25 people per 1000 square feet(93 m2)of floor area Table C403.23(7),in the appropriate size e a (as established in Table 4033.1.1 of the category, using the same test procedures. : : International�Llechanical Code)shall be provided Equipment shall be listed in the : : with all of the fbllowing features: appropriate certification program to : ° 13.1. A dedicated VAV terminal unit capable of qualify.The smallest chiller or : o controlling the space temperature and compressor in the central plant shall not : ° minimum ventilation shall be provided. exceed 20%of the total central plant : ; 13.2. Demand control ventilation(DCV)shall cooling capacity or the chilled water � ° be provided that utilizes a carbon dioxide system shall include thermal storage sized . ■ sensor to reset the ventilation setpoint of fbr a minimum of 20%of the total central m � the VAV terminal unit from the design cooling plant capacity. o a minimum to design maximum ventilation 16. The DDC system shall include a fault detection and ■ • rate as required by Chapter 4 of the diagnostics(FDD)system complying with the a : International�Llechanical Code. following: e 0 133. Occupancy sensors shall be provided that 16.1. The fbllowing temperature sensors shall a : are configured to reduce the minimum be pernianently installed to monitor : ; ventilation rate to zero and setback room system operation: a ; temperature setpoints by a minimum of 16.1.1. Outside air. : 0 5°F,fbr both cooling and heating,when 16.1.2. Supply air. e � the space is unoccupied. 16.13. Return air. o a 14. Dedicated server rooms,electronic equipment 16.2. Temperature sensors shall have an a a rooms,telecom rooms,or other similar spaces with accuracy of t2°F(1.1°C)over the range ; � - of 40°F to 80°F(4°C to 26.7°C). a CE-70 2015 Washington State Energy Code