Labconco Intelli-Sense Multi-Speed Blowers 7183413 - Manuel (Page 5)

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NTRODUCTION
Congratulations on your purchase of a Labconco Intelli-Sense Multi-Speed Blower
(MSB). Your MSB with electronically commutated motor (ECM) has been
specifically engineered to meet the demanding requirements of most laboratory
ventilation situations associated with fume hood and enclosure exhaust. The
outside steel housing of the blower encloses the UL listed ECM motor, shaft,
junction box wiring, and bearings. The MSB also includes a fume hood blower
control box to be located on top of the fume hood, inlet power control cable, three
position switch replacement, and fume hood switch label replacement.
The contaminated air housing of the Coated Steel Blower has a protective phenolic
coating. The Fiberglass Blower features a fiberglass reinforced polyester housing
and an injection molded polypropylene impeller. The PVC Blower housing is
formed out of polyvinyl chloride (PVC) and the impeller wheel is injection molded
polyvinylidene fluoride (PVDF). The MSB’s feature cooling vents and weather
cover that allow for unrestricted exterior roof mounting. The blowers also feature
forward curved impellers to ensure quiet operation and optimum air delivery.
All Multi-Speed Blowers utilize a direct drive ECM motor that uses 1/3 less
energy than typical AC belt drive motors. ECM’s run approximately 95% efficient
whereas AC motors run about 60% efficient. Multi-Speed Blowers make it easy to
size fume hood blower systems as they cover a much broader speed range. For
most applications, the Intelli-Sense Blower is typically used for only one fume
hood. The Intelli-Sense Multi-Speed Blower with two or three position operation
can be used in standby mode or night setback mode and set to exhaust at a
minimum flow rate with the fume hood sash closed. Two or three speed blower
systems should be considered when the total number of fume hoods does not
financially substantiate the start-up costs of a variable air volume (VAV) system.
Two or three position blower systems are less expensive to install and still provide
an air volume reduction. Please reference Appendix E for typical laboratory
controls with individual Intelli-Sense Blowers. Studies have shown that fume
hoods on two or three position systems can reduce air flow (CFM) by 50-70% per
year. For example, a 6-ft fume hood operating 24 hours a day at 100fpm (735 CFM