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� 163. The VAV air handling unit controller 16.8.2. Not economizing when the <br /> shall be configured to provide system unit should be economizing. <br /> � status by indicating the following: 16.8.3. Economizing when the unit <br /> 163.1. Free cooling available. should not be economizing. <br /> . 16.3.2. Economizer enabled. 16.8.4. Outdoor air or retum air <br /> : 163.3. Compressor enabled. damper not modulating. <br /> e 163.4. Heating enabled. 16.8.5. Excess outdoor air. <br /> 16.3.5. Mixed air low limit cycle 16.8.6. VAV terminal unit primary air <br /> active. valve failure. <br /> 16.3.6. The current value of each <br /> sensor. <br /> ; 16.4.The VAV airhandling unit controller SECTION C404 <br /> shallbecapableofmanuallyinitiating SERVICEWATERHEATING (MANDATORY) <br /> each operating mode so that the operation <br /> of compressors,economizers,fans and the C4041 General.This section covers the minimum <br /> heating system can be independently efficiency of,and controls for,service water-heating <br /> tested and verified. equipment and insulation of service hot water piping. <br /> 16.5.The VAV air handling unit shall be C404.2 Service water-heating equipment performance <br /> configuredto report faults to a fault efflciency.Water-heating equipment and hot water <br /> management application accessible by storage tanks shall meet the requirements of Table <br /> day-to-day operating or service personnel C404.2.The efficiency shall be verified through <br /> or annunciated locally on wne certification and lisfed under an approved certification <br /> thermostats. program,or if no certification program exists,the , <br /> ; 16.6.The VAV terminal unit shall be equipment efficiency ratings shall be supported by data <br /> a configured to report ifthe VAV inlet fumished by the manufacturer. Water-heating equipment . <br /> valve has failed by performing the also intended to be used to provide space heating shall <br /> following diagnostic check at a masimum meet the applicable provisions of Table C404.2. <br /> a interval of once a month: <br /> 16.6.1. Cotnmand VAV tertninal nnit C404.21 IIigh input-rated service water heating <br /> ( systems. Gas-fired water-heating equipment installed <br /> t primary air inlet valve closed <br /> and verify that primary airflow in new buildings shall be in compliance with this <br /> goes to zero. section.Where a singular piece ofwater-heating <br /> 16.6.2. Command VAV thermal unit equipment serves the entire building and the input <br /> primary air inlet valve to rnting of the equipment is 1,000,000 Btu/h(293 kW)or <br /> design airflow and verify that greater,such equipment shall have a thermal efficiency, <br /> unit is controlling to with 10°/a Et,ofnot less than 90 percent.Where multiple pieces of <br /> of design airflow. water-heating equipment serve the building and the <br /> 16.7.The VAV terminal unit shall be combined input rating of the water-heating equipment <br /> configured to report and trend when the � is 1,000,000 Btu/h(293 kW)or greater,the combined <br /> zone is driving the following VAV air input-capacity-weighted-average thermal efficiency, <br /> handling unit reset sequences.The Et, shall not be less than 90 percent. <br /> building operator shall have the capability �xceptions: <br /> to exclude zones used in the reset 1. Where 25 percent of the annual service <br /> a sequences from the DDC control system water-heating requirement is provided by <br /> graphical user interface: site-solaz or site-recovered energy, the <br /> 16.7.1. Supply air temperature minimum thermal efficiency requirements <br /> a setpoint resetto lowest supply ofthis section shall not apply. <br /> ; air temperature setpoint for 2. The input rating of water heaters installed in <br /> y cooling operation. individual dwelling units shall not be <br /> 0 16.7.2. Supply air duct static pressure required to be included in the total input <br /> setpoint reset for the highest rating of the service water-heating <br /> o duct static pressure setpoint equipment for a building. <br /> allowable. 3. The input rating ofwaterheaters with an <br /> 16.8.The FDD system shall be configured to input rating of not greater than 100,000 <br /> � detect the following faults: Btu/h(29 kW)shall not be required to be <br /> 0 16.8.1. Air temperature sensor included in the total input rnting of service <br /> o failure/fault. water-heating equipment for a building. <br /> 2015 Washington State Energy Code CE71 <br />