Marvair Scholar III™ VAISA I&S Manual 03/2019 Rev. 8
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4. Locate the 6 holes on the side flanges (3 on each side) of the plenum.
5. Secure the plenum to the Scholar III unit with the six ½” hex head screws.
6. Attach the front panel top the front of the plenum with the six screws. Make sure that
the two screws located between the supply grilles are at the top.
7. Adjust the vanes on the grilles to deliver the optimize air flow to the classroom.
The air distribution system which is field supplied and installed downstream of the
specified
ducted plenum
must be engineered to assure sufficient air flow, even
under adverse conditions, such as dirty filters. The information provided in Figure 1,
Appendix A should be used to design the air distribution system duct size leaving the
Scholar III™ unit, keeping the external static pressure to a minimum.
Applications using duct work should be designed and installed in accordance with the
current edition of the National Fire Protection Association codes and standards 90A
and 90B. The duct system must be engineered to insure sufficient air flow through
the unit to prevent over-heating of the heater element. This includes proper supply
duct sizing, sufficient quantity of supply registers, adequate return and filter area.
Ductwork must be of correct material and must be properly insulated. The duct work
must be constructed of galvanized steel with a minimum thickness of .019. Ductwork
must be firmly attached, secured and sealed to prevent air leakage. Do not use duct
liner on inside of supply duct within four feet of the unit.
Galvanized metal duct extensions should be used to simplify connections to ductwork
and grilles. Use fabric boots to prevent the transmission of vibration through the duct
system. The fabric must be U.L. rated to a minimum of 197°F.
HOLE
LOCATION
FOR
TOP PANEL
