The filters used to clean the circulating air during the
construction process must be either changed or thorough-
ly cleaned prior to occupancy.
The furnace, ductwork and filters are cleaned as neces-
sary to remove drywall dust and construction debris from
all HVAC system components after construction is com-
pleted.
Verify proper furnace operating conditions including igni-
tion, gas input rate, air temperature rise, and venting ac-
cording to these installation instructions.
Dimensions and Clearances (*8DNL)
fl°'T i
LEFT SIDE
281/2
_-J 313116
11/16
_ 213/16
2415/16
165/8 nil 6
NOTE: Evaporator "A" coil drain pan dimen-
sions may vary from furnace duct opening
size. Always consult evaporator specifica-
tions for duct size requirements.
Furnace is designed for top return ONLY.
Return air through back of furnace is NOT
allowed.
_E
0"
FRONT
11/16
Drawing is representative, but some models may vary
DIMENSIONAL INFORMATION
Unit Cabinet Top Bottom
Capacity A B C D
*8DNL050B12 151/2 14 5
5/16 141/8
*8DNL075B12
*8DNLO75F16 191/8 175/8 73/4 1711116
*8DNL1OOF14
8DNL1OOL20 241/2 23 107116 231/8
*8DNL125L20
Dentoes Brand
MINIMUM CLEARANCES TO COMBUSTIBLE
MATERIALS FOR ALL FURNACES
REAR 0
FRONT (combustion air openings 3"
in furnace and structure)
Required For Service *24"
ALL SIDES Of SUPPLY PLENUM 1"
SIDES 0
VENT
Single-Wall Vent 6"
Type B-1 Double-Wall Vent 1"
TOP OF FURNACE 1"
"30" clearancerecommendedfor casingremoval.
See Section9.DuctworkandFiiter, Sub-basesforCombustibleFloors-
Furnace ONLYand DownflowCoilAdapterBox sectionsof thismanual
for installationoncombustibleconstruction.
-- 181/2
RIGHTSIDE
24 3/16
121/16 _3
3/4
40
DIMENSIONS IN INCHES
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
FIRE HAZARD.
Failure to install furnace on noncombustible
subbase could result in death, personal injury and/or
property damage.
Place furnace on noncombustible subbase on
downflow applications, unless installing on
noncombustible flooring.
441 O1 231402 [_
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