06-06
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 Article 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, dietetic equipment, 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), by unit number, including the following:
A. Air handling unit capacity and sketch of component arrangement with
physical dimensions for louvers, dampers, access provisions, filters,
coils, fans, vibration isolators, etc.
B. Required performance (Pressures, flow rate, horsepower, motor size,
etc.) for all air handling units, fans and pumps for intended modes
of operation. Include fan and pump performance curves.
C. Coil selections for preheat, heating, cooling and energy reclaim.
D. Heat recovery equipment.
E. Refrigeration equipment loading, performance and selection.
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