Havesomeonecheckthestructurefrequentlyduringcold
weathertomakesureitiswarmenoughtopreventpipes
fromfreezing.Suggesttheycallaqualifiedserviceagency,
ifrequired.
Poison carbon monoxide gas hazard.
If this furnace is replacing a previously
common-vented furnace, it may be necessary to
resize the existing vent line and chimney to
prevent oversizing problems for the other
remaining appliances(s). See applicable codes
and Venting and Combustion Air Check in Gas
Vent Installation section.
Failure to properly vent this furnace or other
appliances can result in death, personal injury
and/or property damage.
Locationand Clearances
If furnace is a replacement, it is usually best to install the furnace
where the old one was. Choose the location or evaluate the exist-
ing location based upon the minimum clearance and furnace di-
mensions (Figure 1 and Figure 2).
CAUTION
Do NOT operate furnace in a corrosive atmosphere
containing chlorine, fluorine or any other damaging
chemicals. Refer to Combustion & Ventilation Air sec-
tion, Contaminated Combustion Air.
Upflow Dimensions and Clearances (NTC6/GNE & NTN6/NNE)
I K
HI K
I
I
I
I
C
t50,060 BTU ONLY
AirBaffle DO NOTREMOVE
I
I
]
I
I
MINIMUM CLEARANCES TO
COMBUSTIBLE
MATERIALS FOR ALL UNITS
REAR 0
FRONT 3" (75mm)*
For Service 30" (760mm)
ALL SIDES Of SUPPLY PLENUM 1" (25mm)
SIDES 0
VENT
Single Wall Vent 6" (150mm)
Type B-1 Double Wall Vent 1" (25mm)
TOP OF FURNACE 6" (150mm)
* 6" with accessory Masonry Chimney drafthood kit installed.
30" min.
DIMENSIONAL INFORMATION
25-20-29a
ALL DIMENSIONSIN INCHES(millimeters)
MODEL
CABINET
A B C
40 151/2 281/2
40 191/8 281/2
050FB / 075FB
050B12 / 075B12
075HF & 075F16
100KF / 100F20
100KJ / 100J20
125KJ / 125J20 40 223/4 281/2
150KJ / 150J20
mm Equivalents 40=1016 151/2 = 394 191/8 = 486 "
211/4 = 539 231/8 = 587 128/8 = 311 143/4 = 375
26 = 660 237/8 = 606
441 012308 01
SUPPLY AIR
D I E
181/2 I 14
181/2 I 175/8
181/2 I 211/4
RETURN AIR
BOTTOM SIDE
F IG i. iJ
231/8 125/8 121/4 221/2
231/8 143/4 141/2 221/2
231/8 183/4 141/2 221/2
223/4 = 578 281/2 = 724 181/2 = 470
183/4 = 476 121/4 = 311 141/2 = 368
GAS CONNECTION
K L M
281_ 26 237_
281_ 26 237_
281_ 26 237_
14 = 356 17_8=448
2216 = 572 281/4 = 717
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