Plans (25) M EC2021 - 00587
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-- OFFICE COPT(
RECEIVED
qCJUL 22 2021
Latimer HVAC
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CITY OF TIGARD
- - - - - - - BUILDING DIVISION CCB#220839
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VALIDITY OF FERMI
THE ISSUANCE OF A PERMIT
BASED ON CONSTRUCTION
- - — - - -- - - - - - - DOCUMENTS AND OTHER
DATA SHALL NOT PREVENT
THE CODE OFFICIAL FROM
REOFIERRORS. OSG THE ON
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THE ACTIVATION OF A DUCT
S / SMOKE DETECTOR SHALL
ACTIVATE A VISIBLE AND
7� 32 _nSeS Ct�f' LE SUPERVISORY
SIGNAL AIB AT A CONSTANTLY
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ATTENDED LOCATION
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permit#: m,
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1 X I Ventilation Requirements- based on 2019 GMSC table 403.3 Q
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RTU1 and 2 single zone retail (n
12000 sft breathable zoneU
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Persons-7.5 cfm X 15p/1000sft= 1350 cfm M M
-i Area-0.12 cfm/sft= 1440 cfm = 2 CSA
Vbz =2790 cfm v N F—
Ez = 0.8 (supply and return in ceiling) N 0
Voz= 3488 cfm
O \ ` PJ p A RTU1 and 2 (each)- L 0
SA = 8000 cfm M
RA= 6200 cfm
OSA= 1800 cfm
Latimer HVAC
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01 HEATING•VENTILATION•AIR CONDITIONING
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V Scooe of Work
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I J PJ OD Latimer HVAC will perform the following scope of work:
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o j 01. Provide and install new rooftop gaspack unit on existing curb. Use curb clips. Replacing existing
v / units like for like.
2. Gas piping final connection at new RTU.
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Enuioment Schedule
RTU7,2-. Trane YSD240G4RLC- 20-ton nominal. 460/3/60- 52 MCA, 70 MOCP. 255.72 Mbtu gross
cooling- 10 EER, 12.4 leer. 250,000 Btu input gas. 80%TE. 8000 cfm. 5HP indoor fan motorincludes !
i' economizer, power exhaust, smoke detectors.
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Net weight of new unit = 1977# net. Old unit- 2025#. i
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Mechanical General Notes:
j 1. Cooling equipment does not exceed the load of the calculated requirement.
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--:� 2. Existing programmable thermostat. 5 degree deadband minimum. 7 day. Microprocessor. Set program for
night 3. Fanmotor energy
does not exceed allowable,first available above BHP.
4. Max leakage rate of OSA or exhaust dampers to be 4 cfm/sft @ 1.0 sp.
5. Provide O and M to building owner.
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