]2.1.4
Desiccant Wheel
Supply and regeneration airstreams shall be counterflow. The dehumidifier
shall be a rotary type designed for continuous operation. The wheel
structure shall be of the extended surface type in the axial flow direction
and the geometry shall provide for laminar flow over the operating range
for minimum air pressure differentials. The dehumidifier shall be complete
with a drive system utilizing a fractional-horsepower electric motor and
speed reducer assembly driving the rotor. A slack-side tensioner shall be
included for automatic take-up for belt-driven wheels. The desiccant
material shall be an adsorbing type. The desiccant material shall be
applied to the wheel such that the entire surface is active as a desiccant
and the desiccant material does not degrade or detach from the surface of
the wheel. The wheel shall be fitted with full-face, low-friction contact
seals on both sides to prevent cross leakage. The rotary structure shall
have underheat, overheat and rotation fault circuitry. The wheel assembly
shall be warranted for a minimum of five years.
[2.1.5
Evaporative Chiller
Evaporative chiller shall meet the requirements of Section 15721N
EVAPORATIVE COOLING SYSTEMS.
]PART 3
EXECUTION
3.1
PREPARATION
Provide storage for equipment and materials at the project site.
Parts
shall be readily accessible for inspection, repair, and renewal.
Protect
materials and equipment from weather.
3.2
INSTALLATION
Install desiccant dehumidification equipment as indicated and in accordance
with the manufacturer's instructions. Provide clearance for inspection,
repair, replacement, and service. Electrical work shall conform with NFPA
70 and Division 16, "Electrical". Provide overload protection in the
operating disconnect switches and magnetic starters. Locate outside air
intake at a minimum of 8 meters 25 feet from industrial stacks, bathroom
vents, and sanitary risers. Prevailing wind direction shall not be used as
justification for placing air intake closer than 8 meters 25 feet of
sections together in high pressure units. Pipe drain pan to nearest floor
drain.
3.3
FIELD QUALITY CONTROL
Schedule and administer specified tests. Provide personnel, instruments and
equipment for such tests. Correct defects and repeat the respective
inspection and tests. Give the Contracting Officer ample notice of the
dates and times scheduled for tests and trial operations. Conduct
inspection and testing in the presence of the Contracting Officer.
Inspection
Prior to initial operation, inspect equipment installation for conformance
with drawings and specifications.
SECTION 15751N
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