2
3
/
16
3
7
/
8
4
15
/
16
ALL DIMENSIONS in(mm)
1 in = 25.4 mm
Drawing is representative, some models may vary in appearance
NOTE:
Evaporator “A” coil drain pan dimensions
may vary from furnace duct opening size. Always
consult evaporator specifications for duct size
requirements.
Unit is designed for top return ONLY.
Return air through back of unit is NOT allowed.
TOP
water
heater
25
−
24
−
15a
−
1
30
″
16
5
/
8
11
/
16
8
1
/
4
BOTTOM
D
LEFT SIDE
24
15
/
16
9
1
/
8
18
1
/
2
9
3
/
16
2
13
/
16
1
1
/
16
3
/
4
FRONT
11
/
16
A
B
RIGHT SIDE
18
1
/
2
3
7
/
8
1
1
/
16
9
3
/
16
24
15
/
16
12
1
/
16
3
3
/
4
40
A
28
1
/
2
3
13
/
16
C
11
/
16
(724)
(470)
(762)
(17)
(97)
(19)
(27)
(232)
(633)
(71)
(98)
(233)
(125)
(17)
(210)
(422)
(95)
(306)
(633)
(267)
(1016)
(27)
(56)
(233)
(17)
(98)
441 01 2314 06
Specifications are subject to change without notice.
5
Figure 1
UNIT
Dimensions and Clearances (*8DNL)
DIMENSIONS
MINIMUM CLEARANCES TO COMBUSTIBLE
MATERIALS FOR ALL UNITS
REAR
0
FRONT
3
″
(76 mm)
Recommended For Service
30
″
(762 mm)
ALL SIDES Of SUPPLY PLENUM
1
″
(25 mm)
SIDES
0
VENT
Single Wall Vent
6
″
(152 mm)
Type B
−
1 Double Wall Vent
1
″
(25 mm)
TOP OF FURNACE
1
″
(25 mm)
Horizontal position: Line contact is permissible only between lines
formed by intersections of top and two sides of furnace jacket, and
building joists, studs or framing.
DIMENSIONAL INFORMATION
Unit
Capacity
Cabinet
Top
Bottom
A
B
C
D
*8DNL050B12
*8DNL075B12
15
1
/
2
(394)
14
(356)
5
5
/
16
(135)
14
1
/
8
(359)
*8DNL075F16
*8DNL100F14
19
1
/
8
(486)
17
5
/
8
(447)
7
3
/
4
(197)
17
11
/
16
(449)
*8DNL100L20
*8DNL125L20
24
1
/
2
(622)
23
(584)
10
7
/
16
(265)
23
1
/
8
(587)
* Denotes Brand
Furnace Installation
Inspect the rating plate to be certain the model number begins with
“*8DNL”
. This identifies the furnace as a dedicated downflow fur-
nace that is permitted to be Installed in a Downflow position. (see
Figure 2
)
.
* Denotes Brand
Downflow
The minimum clearances to combustible material
MUST
be main-
tained between the furnace and adjacent construction, as shown
in
Figure 1.
FIRE HAZARD
Failure to follow this warning could result in
personal injury, death and/or property damage.
Place furnace on noncombustible subbase on
downflow applications, unless installing on
noncombustible flooring.
!
WARNING
In addition to clearances in
Figure 1
, clearance for the vent pipe
must be considered.
A subbase for combustible floors
MUST
be used when the furnace
is installed on combustible material. See “
Ductwork and Filter”
.
