Plans r
Scope of Work
Oregon Heating and Air Conditioning will perform the following scope of work: OHAC
1. Provide and install new 3-ton rooftop gaspack unit. `. 41 CCB # 172126
• 2. Provide and install 3 exhaust fans for restrooms and server room, door louver for server MUA. J
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3. Ducting and air distribution modifications and new as drawn.
4. Gas piping from meter to existing lines, extend to new RTU.
' Ventilation Requirements- based on 2014 OMSC table 403.3
RTU1- single zone office
1250 sft breathable zone
Persons-5 cfm X 5p/1000sft = 32 cfm
Area-0.06 cfm/sft = 75 cfm
Vbz =107 cfm
AEz= 0.8 (supply and return in ceiling)
--- _� _ Voz= 134 cfm RECEIVED
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l�,„/',, �,� � '.- � � � - � � — Persons-5 cfm X 50pl1000sft - 195 cfm
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r ■�__ ! �_ ■��� ;'� Vbz=242 cfm O
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/ Mechanical General Notes:
1. Cooling equipment does not exceed the load of the calculated requirement.
Equipment Schedule 2. All steel ducting will be 26 ga minimum galvanized.
RTU1- Existing package rooftop 5-ton- 1950 cfm design. 3. Heating and cooling ducting to be designed to not exceed 0.5 wc positive (supply) and 0.5 wc negative (return).
RTU2- Trane YSC036E3- 3 ton. ; y$0'3/60„Vii,JICA, - _+AOCP. 36,000 Btu cooling, 13 seer. 4. Provide programmable thermostat. 5 degree deadband minimum. 7 day. Microprocessor. Set program for night
60,000 Btu input gas, 80% AFUE. 744# max operating weight. ,A✓/Ge-,Ynci energy savings. A /�
EF1- Nutone QTRN80- 80cfm @ 0.2 Cr,. On switch. 5. Seal ducting with UL listed mastic or mastic tape. \`I/�
6. Fan motor does not exceed allowable, first available above BHP.
EF2- Greenheck Spa510- 500cfm @ 0.125 sp. On line voltage thermostat. 7. Support duct per Smacna, install flex per mfg.
8. Max leakage rate of OSA or exhaust dampers to be 4 cfm/sft @ 1.0 sp.
9. Provide 0 and M to building owner.
OHAC
GAS- CCB # 172126
Per OMSC Table C402.4(5)
429 B 2 550 B 2Psi inlet pressure @ 1.0 Psi pressure drop
Max 250' developed length
_ 1" pipe adequate for 1,040,000 Btu
# ii ;IL I I' A 3/4" pipe adequate for 583,000 Btu
Load-
• • WO • ' UH1,UH2- 200,000 each
. • • • IIPY••••." 0 iii • RTU1- 100,000 Btu input
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/ ' 0 � RTU2- 80,000 Btu input
•�. `ter Total - 580,000 Btu
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AREA OF WORK
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