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ii <br /> 2015 Washington State Eilei yy Code Compliance Forms for Commercial, R2=did R3 over 3 stories and all R1 <br /> Economizer Exceptions MECH-ECONO <br /> 2015 Washington State Energy Code Compliance Forms for Commercial Buildings including R2&R3 over 3 stories and all R1 Revised January 2017 <br /> Project Title: Car Toys Everett,WA RTU replacement Date 9/23/2019 <br /> For Building Dept. Use <br /> All cooling systems shall be configured to provide air economizer operation,regardless of <br /> system capacity,for new construction and mechanical system alterations.Various exceptions to <br /> this requirement are available. Identify all systems that an economizer exception will be applied <br /> to and additional information as noted below. <br /> I, j, <br /> ECONOMIZER EXCEPTIONS-NEW CONSTRUCTION AND ADDITIONS <br /> Economizer Lighting+ <br /> Exception Exp 1 Cooling equipment serving spaces that are provided with a dedicated System ID Equipment <br /> outdoor air system(DOAS)per C403.6.Spaces served shall have year- Loads(W/sf) <br /> Summalry round design cooling loads from lights and equipment less than 5 watts per <br /> I square foot. <br /> !l li I' a iI 1 j `ll � I <br /> jj,lExIIIII <br /> !1,1,1 <br /> I � Single zone unitary,, g or package systems with dehumidification that affect System ID <br /> other systems such that air economizer would increase energy <br /> consumption. <br /> Refer to Section <br /> C403.3 for!I ' <br /> descriptional of Exp 3 High efficiency single zone unitary or packaged systems.Equipment System ID <br /> economizers cooling efficiency shall be better than the WSEC required minimum <br /> provisions and efficiency by at least 64%in Climate Zone 4C and 59%in Climate Zone 5B <br /> exceptions. For per Table C403.3. <br /> alterations refer <br /> to Section Exp 4 Equipment that provides hydronic chilled water for chilled beams and <br /> C503.4 and System ID <br /> Table C503.4. chilled ceiling systems that is served by a water economizer system per <br /> C403.3.4 in lieu of air economizer. <br /> Exp 5 Water-source heat pumps with heat recovery. Heat pump efficiency shall System ID <br /> be 15%better than WSEC required minimum efficiency.Provide at <br /> minimum 60%air economizer.Energy recovery to preheat OSA shall <br /> have at least 50%effectiveness.Additional system requirements apply. <br /> Exp 6 Cooling equipment serving Group R occupancies.Per unit limit Cooling <br /> Equipment <br /> is less than 20,000 Btu/h cooling capacity for equipment installed System ID Location <br /> outdoors or in a mech room adjacent to the outdoors. For cooling (Btu/h) <br /> Capacity <br /> Hi equipment installed in other locations the unit limit is less than <br /> II <br /> 1 54,000 Btu/h.Efficiency shall be 15%better than WSEC <br /> I I lI Ij; I II I Ii required minimum efficiency. <br /> I ll it � j l 11 <br /> I1 I1'i 6x Variable refrigerant flow(VRF)systems with energy recovery.Outdoor Cooling <br /> I unit shall be a reverse-cycle heat pump with variable speed Outdoor Unit Capacity <br /> ' i' compressor(s)and condenser fan(s).Outdoor unit cooling capacity shall System ID (Btu/h) <br /> be not less than 65,000 Btu/h.Energy recovery to preheat outdoor air <br /> 'I shall have at least 50%rated effectiveness.System shall be capable of <br /> llproviding simultaneous heating and cooling by tranferring recovered <br /> energy from zone(s)in cooling mode to other zone(s)that are in heating <br /> mode. <br /> II <br /> Exp 8 Cooling equipment serving Controlled Plant Growth Environments. System ID SEER,EER,& <br /> Equipment cooling efficiency shall be better than WSEC required IEER <br /> minimum efficiency by at least 20%.Not eligible:unitary and applied <br /> heat pumps. <br /> Exp 9 Cooling equipment with energy recovery.Spaces served shall have Lighting+ <br /> year-round design cooling loads from lights and equipment greater than System ID Equipment <br /> 5 watts per square foot.Energy recovery system shall utilize recovered Loads(W/sf) <br /> energy for on-site space heating or preheating of service hot water. <br /> j' Provide calculations to the code official that demonstrate the amount of <br /> I recovered energy used for on-site heating purposes is equivalent to the <br /> annual energy that would be saved by the cooling system with air <br /> economizer per C403.3. <br /> Economizer Exceptions, cont. MECH-ECONO <br /> 2015 Washi l ton State En rgy Code Compliance Forms for Commercial Buildings including R2&R3 over 3 stories and all R1 Revised January 2017 <br /> 1 Il Prooec.;T1� f p, 11 , Date 9/23/2019 <br /> I <br /> ', � IMI ;' , I 1 I , <br /> '11'111� I,jl 11 . l <br /> I <br />