Plans MU 161 q 0015.2
Ventilation Requirements- based on 2010 OMSC table 403.3 OHAC
Scope of Work
Oregon Heating and Air Conditioning will perform the following scope of work: RTU1-single zone office RTU2-single zone office
9 9 9 p . p 880 sft breathable zone 1100 sft breathable zone
• 1. Provide and install 2 new rooftop HVAC 4-ton units. Persons-5 cfm X 5p/1000sft=22 cfm Persons-5 cfm X 5p/1000sft=28 cfm COB # 172126
• 3. P ovde manual OSA dampers. Area-0.06 cfm/sft=53 cfm
Area-0.06 cfm/sft=66 cfm
- 3. Provide and install(1}exhaust fan with ducting from restroom. Vbz=75 cfm Vbz=94 cfm •
4. Ducting a and air-distribution omxis i as drawn. Ez=0.8(supply and return in ceiling) Ez=0.8(supply and return in ceiling)
5. Gas extension from existing house line. Voz=94 cfm Voz=118 cfm E it.)
SA=1600 cfm SA=1600 cfm
Equipment Schedule ° to in ut heatin .774# Max. RA=1400 cfm RA=1450 cfm RTU1 2-Trane YSC048E3-208-23013/60.24.1 MCA,35 MOCP. 13 seer 49,450 Btu cooling;80/°AFUE gas 80,000 B p g RiM\41
EF1-Nutone OT80-80 cfm @ 0.25 SP.On switch. OSA-100 cfm OSA-150 cfm �A P� p c� `t01
UH1-Existing unit heater.225,000 Btu. -. `v1 s,
1 j,,---- g�11.10IN -t .
t -- GRADE t
i _. .., .X1r-'11
riq.; S {„r.ivawsnntw MAIII[i s MIMI . c> :.0 1 nif.
I = t 1 I .a �+ _ . f
I /ZcJ m ; 8
0 ad 1 i _.
i f ( Ly��J ti curl Mltitifm[tRa us WsY�In11{td In NNft/MNIi1�rN/Ulln1{hU{NlSbl{N{!{NLN 11�' M
r�rw•.•:ra.tiv.*xn+.n w:•:{�r:•.:a+� ti�.Rw•x•w..:tirr..{:K+.r.....+7 - ` 1 : i 1 I •O. nn,,
• 1 F / 1 W
1 �` 1; 1 32 o C Q
E s t �y �` L it, t GAS- N
U 0
I' g n ��
it - m e _ $ / 2 lines to 2 current meters
�[XJ 1 3� tea .f� �, j
Z
', , Per OMSC Tabel C402.4(1) _ p CO
`. „ , -aa MS ,,,:,,.;u,,,:,,,,Kt . TO Standard pressure @ 0.3 in wc pressure drop - ()
s
/Lei, r ((a) Line 1 Load- O ti
ii m 2 ,^-_'., I UH1 @ 225,000 Btu j CD
'I _ RTU1 @ 80,000 Btu 0 d)
RTU2 @ 80,000 Btu
o ,- - Total = 385,000 Btu 1 ^ 0
T , 1yn l 0
200' developed length•_ �1W �- `4� J ij' "
I 2" existing pipe adequate for 602,000 Btu
11/4" pipe adequate for 209,000 Btu o
I
zK� P uH-1 J. O
7 1"pipe adequate for 102,000 Btu C)
(- P 40 '-
` Mechanical General Notes:
1_.__ 29.-4 3!4'
_ 1. Economizer not required for 46,500 Btu cooling. I
2. Cooling equipment does not exceed the load of the calculated requirement.
// /( t fV 3. All steel ducting will be 26 ga minimum galvanized.
f C r -' l =l b 4. Heating and cooling ducting to be designed to not exceed 0.5 wc positive(supply)and 0.5 wc negative(return).
5. Provide programmable thermostat.5 degree deadband minimum.7 day.Microprocessor.Set program for night energy savings.
6. Seal ducting with UL listed mastic or mastic tape. M 7. Max leakage rate of OSA or exhaust dampers to be 4 cfm/sft @ 1.0 sp.
8. Insulate all supply and return duct min.R8 foilback.
9. Support duct every 8'max or within 2'of direction change with minimum 24ga strap or 12ga wire.
10 Install flex per manuf specs.
11 Provide C)and M to buildina owner.