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Mechanical Requirements • • 17 of <br /> 2018 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 /> C403.4.3.3.1 Water loop heat Indicate method of water loop temperture <br /> pump-temperature control(central plant equipment controls are <br /> deadband configured to provide>_20'F water supply <br /> temperature deadband between heat rejection <br /> and heat addition modes,or controls are <br /> configured for system loop temperature <br /> optimization <br /> C403.4.3.3.2 Water loop heat Indicate type of cooling tower(open-or <br /> pump-heat rejection closed-circuit)in equipment schedule; <br /> equipment indicate whether the cooling tower is used <br /> directly in the heat pump loop or in <br /> conjunction with a separate heat exchanger; <br /> indicate method used to limit system heat loss <br /> when heat rejection is not needed <br /> C403.4.3.3.3 Water loop heat For hydronic heat pump systems with total <br /> pump-isolation system power>10 hp,indicate 2-way <br /> valves isolation valves on each heat pump and <br /> variable flow system control <br /> HEAT REJECTION SYSTEMS-EQUIPMENT SELECTION&PERFORMANCE <br /> C403.9.1.3 Centrifugal fan open- For open-circuit centrifugal fan cooling <br /> circuit cooling towers towers with>_ 1,100 gpm capacity,indicate <br /> cooling towers comply with efficiency <br /> requirements for axial fan open circuit <br /> cooling towers <br /> HEAT REJECTION&RECOVERY-CONTROLS <br /> C403.9.1.1C Fan speed control For each fan powered by an individual motor <br /> 403.9.1.2 or array of motors,with total connected fan <br /> power Z 5 hp(including motor service <br /> factor),indicate method of automatic fan <br /> speed control(adjusted based on leaving fluid <br /> temperature or condenser temperature/ <br /> pressure of heat rejection device);verify fan <br /> selection provides<_30%design wattage at <br /> 50%design airflow <br /> For multiple-cell heat rejection equipment <br /> with VSD,indicate controls are configured to <br /> ramp all fans in unison(not staged on/off <br /> operation) <br /> C403.9.1.4 Cooling tower flow For open-circuit cooling towers configured <br /> turndown with multiple-or variable-speed condenser <br /> water pumps,indicate system is designed so <br /> all cells can be run in parallel;indicate method <br /> of condenser pump turn down control <br /> C403.9.2.1 Heat recovery for For buildings with 24-hour operation and> <br /> service water heating 1,500,000 Btu/h of heat rejection capacity <br /> and design service hot water load>250,000 <br /> Btu/h,indicate condenser heat recovery to pre- <br /> heat service water;or exception applied. <br /> Provide calculations showing the amount of <br /> recovered heat that is utilized(60%of peak <br /> heat rejection load or pre-heat service water <br /> to 85°F). <br /> Page 17125 <br />