035-15266-003 Rev. A (0804)
DUCT CONNECTORS (7990 SERIES)
These duct connectors are for connecting the furnace to an under the floor supply duct system.
The furnace may be installed on combustible flooring without a separate sub-base.
DUCT CONNECTORS FOR
SCREW ATTACHMENT
18 42_434
_14_
o
_L
_13
11
o_o
DUCT CONNECTORS FOR
TAB ATTACHMENT
18¼
14_
_DUCT 11
CUTOUT _°
_ DIMENSIONS o
_o °
FIGURE 4 : DUCT CONNECTOR DIMENSIONS (7990 SERIES)
REAR WALL CEILING CUT-OUT
OF ENCLOSURE ........ / FOR ROOF JACK
W___ .................. // FLOOR CUT*OUT
"_ ,,': , , , , FOR DUCT
I _/ I CONNECTOR
m _ i / i
& i , ,
| _ _ FURNACE
/_ ( 5 ) JN °UTL'NE
i i i OPT ONAL
"!_ i _ _ ...... ELECTRIC
2_1/8,,, !l I
FUTURE REFRIGERANT
LINE ENTRANCE
[_4- ENTRANCE
lq/8
FLOOR
FIGURE 5 : RECOMMENDED FLOOR CUT-OUT (7990
SERIES)
DUCT CONNECTOR
DEPTH
j_FLOOR
SUPPLY DUCT
FIGURE 6 : DUCT CONNECTOR DEPTH
(7990 SERIES)
4 Unitary Products Group
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