1. Two additional 7/8- -in. (22 mm) dia. knockouts are located in the top plate.
2. Minimum return- -air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer's recommendations for equivalent diameters.
3. Minimum return- -air opening at furnace.
a. For 800 CFM- -16- -in. (406 mm) round or 14- -1/2 x 12- -in. (368 x 305 mm) rectangle.
b. For 1200 CFM- -20- -in. (508 mm) round or 14- -1/2 x 19- -1/3 in. (368 x 491 mm)rectangle.
c. For 1600 CFM- -22- -in. (559 mm) round or 14- -1/2 x 22- -1/16- -in. (368 x 560 mm) rectangle.
d. For airflow requirements above 1800 CFM, see Air Delivery table in Product Data literature for specific use of single side inlets. The use of both side inlets, a
combination of 1 side and the bottom, or the bottom of single side inlets. The use of both side inlets, a combination of one side and the bottom, or the bottom only
will ensure adequate return air openings for airflow requirements above 1800 CFM.
A
313AAV/JAV
CABINET
UNIT SIZE
WIDTH
IN (MM)
024045
14--- 3/16 (360)
048070
17--- 1/2 (445)
048090
21 (533)
060110
21 (533)
060135
24--- 1/2 (622)
1. 135 size furnaces require 5 ---in. (127 mm) vents. Use a 4 ---5 in. (102 ---127 mm) vent adaptor between furnace and vent stack.
2. See installation instructions for complete installation requirements.
Variable-speed, induced-combustion deluxe 4-way multipoise gas furnace installation, start-up, operating and service and maintenance instructions series 150/f (60 pages)
2-stage deluxe induced-combustion 4-way multipoise furnace installation, start--up, operating and service and maintenance instructions series 120/c (58 pages)