2020 LAKE HEIGHTS DR WATERFORD PLACE APTS 2021-12-14

2015 Washington State En: ode Compliance Forms for Commercial, R2 . R3 over 3 stories and all R1 • Economizer Exceptions, cont. MECH-ECONO 2015 Washington State Energy Code Compliance Forms for Commercial Buildings including R2&R3 over 3 stories and all R1 Revised January 2017 Project Title: Date 4/2/201 9 ECONOMIZER EXCEPTIONS-NEW CONSTRUCTION AND ADDITIONS,CONTINUED Economizer Exp 10 Cooling equipment for dedicated server,electronic equipment or Compliance Cooling telecom switch rooms.Per building limit for this exception is System ID Capacity Exception 240,000 Btu/h cooling capacity or 10%of required building air Option (Btu/h) Summary economizer capacity,whichever is greater. Part load control required over 85,000 Btu/h.Additional requirements apply. Option a-Cooling equipment efficiency shall be 15%better than the WSEC required minimum efficiency.. Option b-Waterside economizer required.Cooling equipment efficiency shall be 5%better than the WSEC required minimum efficiency. Option c-Waterside economizer required.All cooling equipment is subject to ASHARE Standard 127. Total Claimed Exempt Capacity: Refer to Section Total building air economizer capacity(if claimed>240 kBtu/h): C403.3 for descriptions of Alternate Exp 10 Capacity Limit: economizer ECONOMIZER EXCEPTIONS-MECHANICAL SYSTEM ALTERATIONS OR REPLACEMENT provisions and System ID Alt.Strategy exceptions. For C503.4 Pre-approved design alternative to full compliance with air economizer alterations refer Exp 1 requirement.An alternative for mechanical system alterations where existing to Section building constraints make full compliance with air economizer requirement C503.4 and impractical.Provide calculations to the code official that demonstrate the Table C503.4. proposed alternate design strategy provides similar energy savings to the annual energy that would be saved by the cooling system with air economizer per C403.3. ECONOMIZER EXCEPTIONS-SIMPLE SYSTEMS Cooling C503.4 Qualifying small equipment.Per unit limit less than 33,000 Btu/h.Per System ID Capacity Exp 2 building limit for this exception is 72,000 Btu/h cooling capacity or 5%of (Btu/h) required building air economizer capacity,whichever is greater.Cooling 1 30,000 equipment efficiency shall be 15%better than WSEC required minimum efficiency.Not eligible:non-unitary equipment,unitary equipment installed outdoors or in mech room adjacent to outdoors,equipment installed during new construction,shell-and-core construction,or initial tenant improvement. Total Claimed Exempt Capacity: 30,000 Total building air economizer capacity(if claimed>72,000 Btu/h): Alternate C503.4 Exp 2 Capacity Limit: C503.4 Equipment that provides hydronic chilled water for chilled water terminal Cooling Exp 3 units.Equipment part load cooling efficiency(IPLV)shall be better than System ID Capacity WSEC required minimum efficiency by at least 25%.Per building limit (Btu/h) for this exception is 480,000 Btu/h cooling capacity or 20%of required building air economizer capacity,whichever is greater.Chilled water terminal units serving Group R occupancies are not included in the building capacity total. Total Claimed Exempt Capacity: Total building air economizer capacity(if claimed>480,000 Btu/h): Alternate C503.4 Exp 3 Capacity Limit: Table Compliance Options for alteration or replacement of existing System ID Equipment Compliance C503.4 mechanical cooling equipment per Table C503.4.Refer to table Type Path and all applicable table footnotes for full requirements.Applies to 2b.Split the following retrofit conditions: 1st Floor Systems>_ Option A 54,000 Btu/h Option a-Any new or replacement equipment Option b-Replacement equipment of same type with same or smaller cooling output capacity. Option c-Replacement equipment of same type with large cooling output capacity. Option d-New equipment added to existing system or replacement equipment that is different than existing being replaced.