Lennox Allied Air A95UH1D - Page 9

507270-03 Page 9 of 60Issue 1917
Figure 8. Equipment in Conned Space
(Inlet Air from Ventilated Attic & Outlet Air to Outside)
Ventilation Louvers
Inlet Air
(Minimum 12 in.
(305mm) above
Attic Floor)
Roof Terminated
Exhaust Pipe
Furnace
*Intake Debris
Screen
(Provided)
* See Maximum Vent Lengths table
NOTE: The inlet and outlet air openings shall each have a free
area of at least one square inch per 4,000 Btu (645 mm
2
per
1.17 kW) per hour of the total input rating of all equipment in the
enclosure.
Figure 9. Equipment in Conned Space
(Inlet Air from Ventilated Crawl Space & Outlet Air to
Outside)
Roof Terminated
Exhaust Pipe
Furnace
Ventilation
Louvers
(Crawl Space)
*Intake Debris Screen Provided
Inlet Air
Minimum
12 in. (305mm)
above Crawl
Space Floor
Coupling or
3 in. to 2 in.
Transition
(Field Provided)
* See Maximum Vent Lengths table
NOTE: The inlet and outlet air openings shall each have a free
area of at least one square inch per 4,000 Btu (645 mm
2
per
1.17 kW) per hour of the total input rating of all equipment in the
enclosure.
Figure 10. Equipment in Conned Space - All Air from
Outside
Shipping Bolt Removal
Units with 1/2 hp blower motor are equipped with three
exible legs and one rigid leg. The rigid leg is equipped
with a shipping bolt and a at white plastic washer (rather
than the rubber mounting grommet used with a exible
mounting leg). See Figure 11. The bolt and washer must
be removed before the furnace is placed into operation.
After the bolt and washer have been removed, the rigid leg
will not touch the blower housing.
Figure 11.
Units with 1/2 HP
Blower Motor