Payne PG8J Installation Instructions Manual page 18

LINE CONTACT ONLY PERMISSIBLE BETWEEN
LINES FORMED BY INTERSECTIONS OF
THE TOP AND TWO SIDES OF THE FURNACE
JACKET AND BUILDING JOISTS,
STUDS, OR FRAMING.
MANUAL SHUTOFF
GAS VALVE
SEDIMENT
TRAP
GAS
ENTRY
17 3 /
4
SHEET
METAL
22"
Fig. 17 --- Typical Attic Installation
Fig. 18 --- Upflow Return Air configurations and Restrictions
TYPE-B
VENT
I N *
6 " M
30-IN. MIN
WORK AREA
"
18
3
17 / " OVER ALL
4
4 3 / " UNDER DOOR
4
1" UNDER FURNACE
EXTEND OUT 12" OUT
FROM FACE OF DOOR
* WHEN USED WITH
SINGLE WALL VENT
CONNECTIONS
A02164
A02075