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Mechanical Requirements List, pg 16 of 25 <br /> 2018 WSEC Requirements for Commercial Buildings including Group R2,R3&R4 over 3 stories&all R1-- Administered by©2021 NEEA,All rights reserved <br /> The following information is necessary to check a mechanical permit application for compliance with the mechanical systems and equipment requirements in the <br /> Washington State Energy Code,Commercial Provisions. <br /> For questions about this report,contact WSEC Commercial Technical Support at 360-539-5300 or via email at com.techsupport@waenergycodes.com <br /> C403.4.3.2 Two-pipe changeover Indicate changeover deadband is>_ 15°F <br /> systems outdoor air temperature;indicate controls are <br /> configured so that heating/cooling modes are <br /> active for at minimum 4 hours before <br /> changeover and that the delta between heating <br /> /cooling supply temperatures at changeover <br /> I point is <br /> C403.4.1.5 Heating water For boilers that provide building heating via <br /> temperature setback one-or two-pipe systems.indicate controls <br /> that provide heating water temperature <br /> setback based on outdoor temperature <br /> C403.4.4 Hydronic system part For heating and chilled water systems with>_ <br /> load controls and 300,000 Btu/h output capacity,indicate <br /> supply-water system controls are configured to <br /> temperature reset automatically reset supply water temperature <br /> based upon demand;or exception applied <br /> Indicate automatic pump flow controls are <br /> configured to reduce system flow rate by>_ <br /> 50%,or the maximum allowed by the <br /> equipment manufacturer,based upon the <br /> heating or cooling loads;or decribe why not <br /> required <br /> For hydronic systems with-output capacity> <br /> 300,000 Btu/h that serve heating water <br /> systems,chilled water systems and water- <br /> cooled unitary air conditioners,indicate that <br /> pumps are provided with a variable speed <br /> drive if one of the following conditions apply: <br /> 1)System pump motor hp is>2 hp and <br /> pumps are designed to operate continuously or <br /> per time schedule;2)System pump motor hp <br /> is>7.5 hp and pumps are controlled by <br /> automatic DDC configured to only operate <br /> pumps when there is a call for zone heating or <br /> cooling <br /> Where variable speed drives are required, <br /> indicate system is configured so that pump <br /> motor power is 5 30%of design wattage at <br /> 50%of design flow rate;indicate pump flow <br /> is controlled to maintain one control valve <br /> nearly wide open,or to maintain a mimimum <br /> differential pressure;or exception applied <br /> C403.4.6 Hydronic system For individual pumps required to have <br /> variable pump flow variable speed controls,indicate manner of <br /> control pump speed control(differential pressure, <br /> static pressure setpoint,zone heating or <br /> cooling demand,or based on the relationship <br /> between variable speed controller fequency <br /> and power) <br /> C403.4.5 Chiller/boiler plant Indicate controls are configured to <br /> pump isolation automatically reduce overall plant flow and <br /> shut-off flow through individual chillers and <br /> boilers when not in use <br /> Page 16/25 <br />