The air temperature rise is within the rated rise range on
the furnace rating plate, and the firing rate has been setto
the rating plate value.
The filters used to clean the circulating air during the
construction process must be either changed orthor-
oughly 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 (N8MPN/L)
LEFT SIDE
21/4 • Plugged starting
holeto cutside
13114_1_o_ '°pening
17/8 _ 21314
I 265/8
61/2
_-,__-- 33/4
I 47/8 11/2
"24"Min.
A
-- B--
FRONT
®
C__ BOTTOM
Drawing is representative, but some models may vary
I_ 41116
DIMENSIONS IN INCHES
DIMENSIONAL INFORMATION
Furnace Cabinet Bottom
Model A B C D
N8MPN/L05OB12 151/2 13/8 125i8
NSMPN/L075B12 14
N8MPN/LO75F16
N8MPN100F14 19118 175/8 21/8 143/4
N8MPN/L1OOF20
N8MPN/L1OOJ22
N8MPN/L125J20 22314 21114 115116 183/4
NSMPN/L125J22
ReturnAir
Opening
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" clearancerecommendedforfurnaceremovaL
Horizontalposition:Linecontactis permissibleonlybetweenlines
formedby intersectionsoftop andtwo sides of furnacejacket, and
buildingjoists,studsor framing.
I 281/2 --
-- 33/4 I,,_ I 18112-
2F-_
/1 RIGHT SIDE
1_ 13t/4/
11124,10 213,4265/8
Plugged starting holetocut
sideductopening
NOTE: Evaporator "A" coil drain pan dimensions may vary
from furnace duct opening size. Always consult evaporator
specifications for duct size requirements.
Furnace is designed for bottom return or side return.
Return air through back of furnace is NOT allowed.
25-23-44al
441 O1 261302 [_