Carrier 58CTW Installation, Start-Up, Operating And Service And Maintenance Instructions page 16

LINE CONT A CT ONL Y PERMISSIBLE BETWEEN
LINES FORMED BY INTERSECTIONS OF
THE T OP AND TW O SIDES OF THE FURNA CE
JA CKET AND BUILDING JOISTS ,
STUDS , OR FRAMING.
EQUIPMENT MANU AL
SHUT -OFF GAS VA LV E
SEDIMENT
TRAP
GAS
ENTR Y
17
SHEET
MET AL
22 "
UNION
Fig. 17 - - Typical Attic Installation
Fig. 18 - - Upflow Return Air Configurations and Restrictions
TYPE-B
VENT
m m )
( 1 5 2
I N *
6 " M
30-IN . (762mm)
MIN WORK AREA
"
(451mm)
3
/
4
16
" (451mm)OVERALL
3
17 /
4
" (121mm) UNDER DOOR
3
4 /
4
1 " (25mm) UNDER FURNACE
EXTEND OUT 12 " (305mm)
FR OM FA CE OF DOOR
* WHEN USED W ITH
SINGLE W ALL VEN T
CONNECTIONS
A10164
A02075