13
Figure 3 for Lo Speed
The Speed selector switch provides the following settings, III = High Speed, Figure 1; II = Medium
Speed, Figure 2; I = Lo, Figure 3; and 0 = Off, Figure 4.
Figure 2 for Medium Speed
Figure 1 for High Speed
Figure 4 to turn OFF
WARNING
: Exhausting too much air form a space with Open Combustion Devices (e.g. furnaces,
fireplaces or water heaters) can cause those devices to back draft. This can contaminate the space
with potential fatal gases.
Use this unit only as a recirculating fan. Exhausting no air from the space and thus causing
no negative pressure or back drafting. OR Exhaust a very limited amount of air which does not cause
back drafting. OR Direct one or more units from the fan to the room with combustion devices. This
will positively pressure the room, thus preventing back drafting.
WARNING: When exhausting air from a space, always check Combustion Devices with the fan run-
ning to guarantee the back drafting prevention measures are working.
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