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Mechanical Requirements • • of <br /> 2021 WSEC Requirements for Commercial Buildings including Group R2, R3&R4 over 3 stories&all R1 -- Administered by @2024 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 /> II <br /> NA C403.4.12 Pressure independent For heating and cooling water coils with a <br /> control valves design flow>5 gpm,indicate modulating <br /> pressure independent control values are <br /> provided <br /> HYDRONIC SYSTEMS-CONTROLS <br /> C403.4.3 Boiler sequencing Indicate automatic controls that sequence <br /> operation of multiple boilers <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 /> point is <br /> C403.4.1.5 Heating water For hot water boilers that provide building <br /> temperature setback heating via one-or two-pipe systems,indicate <br /> controls that provide heating water <br /> temperature setback based on outdoor <br /> 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 /> C403.4.4 Hydronic system part Indicate automatic pump flow controls are <br /> load controls and configured to reduce system flow rate by <br /> supply-water 50%,or the maximum allowed by the <br /> temperature reset equipment manufacturer,based upon the <br /> heating or cooling loads;or describe why not <br /> required <br /> C403.4.4 Hydronic system part For hydronic systems with output capacity Z <br /> load controls and 300,000 Btu/h that serve heating water <br /> supply-water systems,chilled water systems and water- <br /> temperature reset 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 /> C403.4.4 Hydronic system part Where variable speed drives are required, <br /> load controls and indicate system is configured so that pump <br /> supply-water motor power is<30%of design wattage at <br /> temperature reset 50%of design flow rate;indicate pump flow <br /> is controlled to maintain one control valve <br /> nearly wide open,or to maintain a minimum <br /> differential pressure;or exception applied <br /> Page 21132 <br />