06-06
rooms.
The exhaust air system shall also pick room air from all
occupied areas.
See Article 6, ENERGY CONSERVATION, for heat
recovery system criteria.
B. SYSTEM CONFIGURATIONS:
1. Four Pipe Fan Coil Units: The fan coil units shall be located under
the windows in vertical, floor mounted arrangement:
a. The use of the horizontal, ceiling suspended, fan coil units is
not permitted due to the probable clogging of the cooling coil
condensate drain lines and drain pans and the resulting
possibility of the growth of algae and bacteria in drain pans.
b. The fan coil units shall not be used for the interior spaces and
corridors.
2. Four Pipe Radiant Ceiling Panel Systems: The radiant ceiling panels
shall be used to heat and cool the perimeter spaces.
The panels
shall be selected in modular (600 mm x 1200 mm (2'x 4') and/or 600 mm
x 600 mm (2'x 2') and continuous, wall to wall, linear
configuration(s). With linear design, the width of the panels shall
be adjusted to match the cooling and heating loads.
a. If the modular panels occupy at least 50% of ceiling area,
complete ceiling construction shall be composed of matching metal
ceiling panels made by the same manufacturer. The ceiling
installation shall be done by one contractor to avoid coordination
problems between active cooling/heating panels and inactive
panels.
b. The arrangement of the central air handling unit for ventilation
shall be identical to the fan coil units with one additional
requirement. The conditioned ventilation air shall be responsible
for removing the space latent heat gain in cooling mode.
Consequently, the supply air temperature of the ventilation air
will have to adjusted in relation to the chilled water temperature
entering the panels to avoid condensation on the panel surfaces.
In addition, appropriate overriding control features should also
be incorporated in the system design, to avoid the possibility of
c. The minimum ventilation air should not be less than the
manufacturer's recommendations.
d. The radiant ceiling panels should not be used in areas with
excessive internal latent heat gain. Example: Conference Rooms.
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