Installation guide

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
18¼
_14_
T
o
Jb.
11
o_o
DUCT CONNECTORS FOR
TAB ATTACHMENT
18_
14 4_123
o_o : oo_:o
_DUCT 11
CUTOUT _°
_ DIMENSIONS o
_o ,
FIGURE 4 : DUCT CONNECTOR DIMENSIONS (7990 SERIES)
REAR WALL CEILING CUT-OUT
2_1/8,,, !1 I
FUTURE REFRIGERANT
LINE ENTRANCE
...... ELECTRIC
ENTRANCE
lq/8
FLOOR
FIGURE 5 : RECOMMENDED FLOOR CUT-OUT (7990
SERIES)
DUCT CONNECTOR
DEPTH
FLOOR
FLOOR
JOIST
SUPPLY DUCT
FIGURE 6 : DUCT CONNECTOR DEPTH
(7990 SERIES)
4 Unitary Products Group