06-06
B. Equipment performance and capacity data shall correspond to that
shown in the calculations, not a particular manufacturer's catalog
data, but the data shall be in the range of available manufactured
products.
C. Convertors, coils, pumps and chillers in glycol-water system shall be
identified on the equipment schedule showing the percent glycol by
volume of the circulating fluid for equipment de-rating purposes.
7.4 PIPING DRAWINGS
A. Avoid routing piping through rooms containing electrical or
communication equipment.
B. Branch piping serving each floor shall have shut-off valves at mains
to isolate branch.
C. Show sections or profiles of underground piping to show elevation
with respect to grade, roads and possible conflicting utilities.
D. The minimum pipe size shall be 20 mm (3/4 inch). The size can be
reduced at the equipment to suit the inlet/outlet connection sizes.
7.5 DUCTWORK DRAWINGS
A. The minimum duct size shall be 203 mm x 152 mm (8 inch x 6 inch).
B. Complete flow diagrams of the supply air, return air and exhaust air
systems shall be shown on the drawings. Flow diagrams shall show the
m3/min (CFM) required in all mains and major branches (such as
zone/floor) and the size of each main and major branch. Flow diagrams
shall show and identify all air handling units, fans, and other major
components in the air system. These diagrams are to facilitate
checking and air balancing.
C. Manual air volume balancing devices shall be provided in supply,
return and exhaust mains, branch mains and terminal branches. Ceiling
access panels are to be installed, where required, for access to
balancing devices. Location of balancing devices shall be shown on
the contract drawings.
D. Dampers in room diffusers and registers shall be used only for minor
balancing requiring a maximum pressure drop of approximately 25 Pa
(0.10 inch water gage). Registers and/or diffusers shall not be
located on main ducts or main branches, but on individual branch
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 "H" drawing control diagrams and floor plans.
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