06-06
ducts with opposed blade balancing dampers in the branch to reduce
room noise transmission.
E. Air quantities on plans shall be "rounded off" to the nearest
increment of .30 m3/min (10 cfm).
F. Smoke detectors for air conditioning systems are specified in the
Electrical Specifications, but the locations at air handling units
shall be shown on the "MH" drawing control diagrams and floor plans.
Coordinate diffuser location and blow direction with space detector
locations shown on the Electrical Drawings to avoid false smoke
alarms caused by air discharge.
G. Provide fire dampers and smoke dampers in accordance with Section 3,
HVAC SYSTEMS.
Provide a schedule for smoke dampers showing sizes,
pressure drops, and compliance with the maximum velocity limit.
Show
duct transitions on drawings.
7.6 CALCULATIONS
A. Calculations shall include room by room heat gain and loss; room by
room air balance showing supply, return, exhaust, transfer, and
make-up air quantities; equipment capacities; economic analysis; and
sound and vibration analysis.
Calculations and analysis should be
identified, arranged and summarized in proper format.
They shall be
indexed in a bound folder with each air handling unit as a zone and
separate chapters for cooling loads, heating loads, exhaust systems,
pumping/piping calculations, fan selections, etc.
B. Heat transfer coefficients, solar radiation, psychrometrics, duct and
pipe sizing, etc., and calculations and analysis shall be in
accordance with the ASHRAE Handbooks and VA Design Manual.
C. Fan and pump motor horsepower, reheat, and duct heat gains shall be
included in cooling load calculations.
D. In addition to internal loads for people and lights include heat gain
from equipment, such as sterilizers, x-ray equipment, washers,
burners, ovens, refrigerators, etc.
E. The use of computer programs and calculations is acceptable and
desirable.
Calculations should, however, be keyed to appropriate
room, zone, and unit numbers for each identification.
7.7 REVIEW SUBMITTALS
In addition to calculations and drawings, the submission shall include
copies of the equipment selection engineering data (handwritten
worksheets shall be acceptable), by unit number, including the
following:
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