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S2900 5 ,;L5 o 0 N. /-:�)E v9N-m i 4- Z-, �✓j�y (zo/J7 Tie-/ �- /e �L! � i 0 TITLE 24 REPORT FOR: NONRESIDENTIAL--Alteration 10 10 1 N. DeAnza Blvd. Cupertino,CA PROJECT DESIGNER: Ken Kellman J&J Air Conditioning Inc. 1280 N.Tenth Street San Jose,CA 95112 (408)920-0662 OWNER: Insignia 10101 N.DeAnza Blvd. Cupertino,CA REPORT PREPARED BY: ENERGY SOLUTIONS Donald F. Murphy Certified Energy Plans Examiner 3828 Melody Lane Santa Clara,CA 95051 (408)249-4841 Job Number. 90622 Date:June 22, 1999 Table of Contents Summary of Mechanical Alteration Problem&Solution----------3 Form MECH-1,Certificate of Compliance: Mechanical------------4 Form MECH-4,Mechanical Ventilation------------------------------5 Mandatory Measures Requirements-----------------------------------6 Contractor's Certification of Minimum Air Flow Capability-------7 Sketch of existing system air flow-----------------------------------8 s � SUMMARY OF MECHANICAL.ALTERATION PROBLEM R SOLUTION THE PROBLEM: The subject building required a fix to prevent the front doors from being held open by high static pressure in the building. The excessive pressure is caused by insufficient exhaust duct cross-sectional area that resulted when the supply duct was installed within the exhaust duct. The condition is only present when the economizer is operating,and is not a problem when in the air conditioning mode only. To remedy the situation by re-designing and re-installing the ducts is prohibitively expensive. THE SOLUTION: As seen in the attached drawing,"Proposed Barometric Relief Grille",it is proposed to create eight relief grilles in the ceiling of the first floor space. The ceiling is now used as a plenum to conduct exhaust air back to the exhaust duct. However,the proposed design would allow the excess exhaust air to also be automatically relieved to the outdoors through a grille in the soffit above the front entrance door when the economizer is producing enough static pressure to actuate the barometric damper.The effect is the same as though the excess air were conducted to the roof and released to the outside through a properly sized exhaust duct. Energy consumption of the building is not affected by this alteration. CERTIFICATE OF comr i PROJECT NAME DATE 1, S ,�/ ' 14 -'2,2-1`l=/` Pi 'CT ADDR SS nz( Gcl PRINCI AL DESIGJER•MECHANICAL TELEPHONE r7 Bw�rq Pwmrt• DOCUMENTATION ALIHORR` TELEPYO�NjE C/ Clocked by/Dal• ENo W*nl Agency Use GENERAL INFORMATION DATE OF PLANS BUI ING CONDITIONS"FLOOR AREA BUILDING TYPE NONRESIDENTIAL HIGH RISE RESIDENTIAL HOTEL/MOTEL GUEST ROOM PHASE OF CONSTRUCTION El NEW CONSTRUCTION ADDITION ALTERATION METHOD OF MECHANICAL PRESCRIPTIVEPFQF RMANCE COMPLIANCE PROOF OF ENVELOPE COMPLIANCE [Z PREVIOUS ENVELOPE PERMIT ENVELOPE COMPLIANCE ATTACHED STATEMENT OF • This Certificate of Compliance lists the building features and performance specifications needed to comply with Title 24, Parts 1 and 6 of the California Code of Regulations.This certificate applies only to building mechanical requirements. The Principal Mechanical Designer hereby certifies that the proposed building design represented in this set of construction documents is consistent with the other compliance forms and worksheets,with the specifications,and with any other calculations submitted with this permit application.The proposed building has been designed to meet the mechanical re '•ements container:in sections 110 through 115, 120 through 124,140 through 142,144 and 145. Please check one: 1 hereby affirm that I am eligible under the provisions of Division 3 of the Business and Professions Code to sign this document as the person responsible for its preparation;and that I am a civil engineer,mechanical engineer,or architect. ❑ I affirm that 1 am eligible under the exemption to Division 3 of the Business and Professions Code by Section 5537.2 of the Business and Professions Code to sign this document as the person responsible for its preparation;and that I am a licensed contractor preparing documents for work that I have contracted to perform. I affirm that I am eligible under the exemption to Division 3 of the Business and Professions Code by Section of the Code to sign this document as the person responsible for its preparation;and for the following reason: 'j PRINCIPAL MECHANI AL DESIGNER•NAME SIG URE LIC.NO. DATE 1 �< - c ZLI 111:104e+. . •• PROJECT NAME DATE MECHANICAL SYSTEMS SYSTEM NAME NOTE TO FIELD TIME CONTROL SETBACK CONTROL ISOLATION ZONES HEAT PUMP THERMOSTAT? ELECTRIC HEAT? FAN CONTROL VAV MINIMUM POSITION CONTROL? SIMULTANEOUS HEATICOOL? HEAT AND COOL SUPPLY RESET? VENTILATION OUTDOOR DAMPER CONTROL? ECONOMIZER TYPE OUTDOOR AIR CFM HEATING EQUIP.TYPE HIGH EFFIC.? MAKE AND MODEL NUMBER COOLING EQUIP.TYPE I HIGH EFFIC.? MAKE AND MODEL NUMBER CODE TABLES:Enter code from table below into columns above. HEAT PUMP THERMOSTAT? TIME CONTROL SETBACK CTRL. ISOLATION ZONES FAN CONTROL S:Prog Switch H,Heating Enter number of I:Inlet Vanes ELECTRIC HEAT? O:Occupancy Sensor C Cooling Isolation Zones. P:Variable Pitch M:Manual Timer B:Both V:VFD VAV MINIMUM POSITION CONTROL? Y:Yes O:Other SIMULTANEOUSHEAWCOOL? N No VENTILATION OUTDOOR DAMPER ECONOMIZER O.ACFM HEAT AND COOL SUPPLY RESET? B.Air Balance A:Aub AAir Enter Outdoor Air C:Outside Air Cart. G.Gravity W:Water CFM. HIGH EFFICIENCY? M:Out Nr Measure N Not Required Nole This shad be no O.Demand Control less than Column G on N:Natural MECH-4. .'ROJECT NAME 1 DAT :YSTEM NAME 40TE:Provide one Copy of this form for each mechanical system. WECHANICAL FA a O ]E:1 © a o a c AREA BASIS OCCUPANCY BASIS REVD. VAV MINIMUM CFM GOND, CFM MIN. NO. MIN. OA. DESIGN LARGEST DESIGN SPACE AREA CFM OF CFM (MAX.OF SUPPLY MIN. I MIN. �NO._ (SF) PER SF I (B X CI PEOPLE (E X 15) DOR F) CFM CFM I CFM IV e D 0 9 tS0 Di A11)14 — �. I I I I I I I I I I f I I I I I I I } I I i I I 1 ,Al TOTALS(FOR MECH-2) I/ v qg C Minimum Ventilation Rate per Section 11121,Table I.F. E Based on Expected Number of Occupants or at least 50%of Chapter 33 UBC Occupant Oensity. H Must ba greater than or equal to G,or use Transfer Air. ( If zone reheat or recool is used,I must be less than or equal to G,or lees than or equal to Total Design CFM X 0.3,or fess thea to B X 0.4,or less then or equal to 300 CFM,whichever is larger. P] Must be less then or equal to I Of applicablel,but no less than G,uniess Transfer Air(K)is used. K Must be greeter then or equal to(G•HI,and,for VAV,greeter then or equal to IG•Jl. Narvesidendsl Compliance form Jon Mandatory Measures There is only one Mandatory Measure that applies to this mechanical alteration: (Ref.P.4-19 of the Non-Residential Manual.) `9f,the designer elects to have the space conditioning system operate at a ventilation rate higher than required by the SlandartL, the Standards require that the space conditioning system be adjustable so that,in the future,the ventilation rate can be reduced to the amount required by the Standards, .....:..." The enclosed MECH-4 form shows the calculated minimum ventilation requirement for this building. The enclosed letter from J&J Air Conditioning certifies that the equipment can indeed meet this requirement using the existing controllable exhaust dampers. C O N O I T I O N / N O Industrial b Commercial Heating/Air Conditioning Service,Repair,Design and Installation Donald F.Murphy Energy Solutions 3828 Melody La Santa Clara,CA 95051 June 16,1999 i Re: 10101 De Anna Blvd:. Dear Donald: This letter certifies that ft A/C unit affecting the first floor of the building at 10101 De Anza Blvd.,Cupertino is capable of modulating the exhaust air down to 0 cfm.This is accomplished by exhaust air dampers controlled by Pltotobelics measuring building static pressure.These dampers close down as building static pressure decreases and open as pressure increases.They are capable of closing completely.The exhaust fan runs constantly as long as the economizer is modulating. As I explained to you during our meeting on June 15,no matter what the position of the economizer,any amount-of fresh air taken in by the economizer must be removed from the building,or building over-pressurization will occur. This air is usually exhausted by fans in the rooftop unit,but because of the duct restriction I showed you,that is impossible.Because this fresh air would normally be removed anyway,it does not matter whether it is vented through a grille over the front door or through the return air system Please call me if you have any further questions. /4..- ls'4'4� Lien Kellman Construction Project Coordinator 1280 N.Tenth Street . San Josc,CA 95112-2801 9 408/9204N,61 . Fax 408/9108087 . Site Lich 3945&7 w 'lte.�h.�+✓ aco norl�� "��� e FF.65A AIR 1 DIP S ,° �Ry V--Au I e '. fco►JPH(ZE� . w(Otoft F..�ur�aC DAr1QtA5 JiD Q I I.0