used.
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The conditioner unit shall consist of a watertight housing containing the
sump, inlet air diffusers, desiccant solution-to-air contact surface,
desiccant solution distribution system and mist eliminator system; and a
free standing pump assembly with tank, vertical seal-less solution pump and
motor, and full-flow solution filter screen. The housing and pump tank
shall be fabricated from corrosion resistant materials resistant to the
desiccant solution. Internal parts shall be made of cupronickel or
nonmetallic corrosion-proof materials. The desiccant solution pump and all
other wetted parts shall be made with corrosion resistant materials.
Fiberglass reinforced plastic surfaces shall be pigmented and U.V.
stabilized for exposure to direct sunlight.
2.6.10.1
Humidity Conditioning
The humidity conditioning system shall be of the liquid desiccant type.
The system shall be capable of simultaneous air cooling and
dehumidification as indicated on the drawings. The system shall
automatically, fully modulate the usage of conditioner coolant and
regenerator heat to match the system cooling and dehumidification loads.
The humidity conditioning system shall deliver air containing not more than
5 microorganisms per 0.3 Cu. m 10 Cu. Ft, as measured by the Six-Plate
Andersen Sampling Method, provided the supply air to the system contains
not more than 100 organisms per 0.3 Cu. m 10 Cu. Ft.
2.6.10.2
Desiccant Solution
The desiccant solution shall be stable and non-toxic and the desiccant
shall not exist in the vapor phase in the conditioned air stream. The
maximum loss rate of desiccant to the conditioned air stream shall not
exceed two parts lithium per billion parts air, by weight. The
manufacturer shall provide the end user with analysis and recommendations
for maintenance of the desiccant solution six times yearly, free of charge,
for the life of the equipment.
2.6.11
Conditioner Cooler (Liquid Desiccant System)
The conditioner desiccant solution cooler shall be of the plate-and-frame
type, with carbon steel frame carrier bars and tiebolts; titanium plates
and nitrite or EPDM gaskets. The solution heater shall be supplied
complete with heating fluid control valve. The heat exchangers shall be
shipped loose for field installation.
2.6.12
Regenerator (Liquid Desiccant System)
The regenerator units shall each consist of a watertight housing containing
the sump, inlet air diffusers, desiccant solution-to-air contact surface,
desiccant solution distribution system and mist eliminator system; and a
free standing pump assembly with tank, vertical seal-less solution pump and
motor, and full-flow solution filter screen. The housing and pump tank
shall be fabricated of corrosion resistant materials resistant to the
desiccant solution. Internal parts shall be made of cupronickel or
nonmetallic corrosion-proof materials. The desiccant solution pump and all
other wetted parts shall be made with corrosion resistant materials
resistant to the desiccant solution. Fiberglass reinforced plastic
surfaces shall be pigmented and U.V. stabilized for exposure to direct
sunlight.
SECTION 15500A
Page 17
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