17
IMPORTANT
VENT SYSTEM INSTALLATION INSTRUCTIONS
WARNING
FAILURE TO FOLLOW ALL VENTING INSTRUCT--
IONS CAN RESULT IN FIRE, ASPHYXIATION, OR
EXPLOSION.
The vent system is an important part of your furnace instal-
lation. Carefully read and observe the following basic
instructions, as well as those packed with the vent system.
EXISTING FURNACE REPLACEMENT
IF THIS FURNACE REPLACES AN
EXISTING FURNACE
,
DO THE FOLLOWING.
1. If a 2
nd
roof, roof cap or addition has been made to the
existing roof of the home,
remove the old vent system
completely!... to avoid the possibility of an improp-
erly installed pipe or gaps in the old vent system,
INSTALL A NEW VENT SYSTEM. Your ceiling and
roof height will determine the correct vent system to
use. Refer to the vent selection table, of the furnace
installation instructions.
2. After unpacking the vent system, check the rain caps.
Insure they are not damaged, tilted or crooked.
Do not
twist, crush or sit on the roof caps during installa-
tion.
Damaged roof caps will cause improper furnace
operation. The furnace will not heat properly and could
result in explosion.
3. After installing vent pipe on furnace top collar, check to
make sure there is no gap in back or side between the
pipe collar and the furnace casing top.
4. Use only the pipes provided with the roof jack assem-
bly. Do not add to or adapt other sheet metal pipes.
Do
not cut, insert or add other pipes to this assembly.
5. In no case should there be a gap between sections of
the flue pipe or the combustion air pipe.
NEW HOME INSTALLATION
IF THIS FURNACE IS INSTALLED ON A
NEW HOME
DO
THE FOLLOWING
1. Inspect the furnace top collars for signs of insulation or
ceiling debris which might have fallen in during cutting
of the ceiling and roof holes. Remove all debris before
continuing.
2. After unpacking the vent system, check the rain caps.
Insure they are not damaged, tilted or crooked.
Do not
twist, crush or sit on the roof caps during installa-
tion.
Damaged roof caps will cause improper furnace
operation. The furnace will not heat properly and could
result in explosion.
3. Before inserting the vent pipe into the furnace top, in-
spect the furnace flue and combustion air opening for
debris or insulation which might have fallen in during
pre---installation steps. Do not proceed unless all de-
bris have been cleaned out or removed.
4. After installing vent pipe on furnace top collar, check to
make sure there is no gap in back or side between the
pipe collar and the furnace casing top.
INSTALLATION IN SNOW REGIONS
When the combustion air pipe inlet is covered or blocked
with snow, the furnace will not operate properly due to the
depleted combustion air supply.
Therefore, if the furnace will be located in regions where
snow accumulation on the roof exceeds 7” or in H.U.D.
Snow Load Zones, a # 7680B6541 roof jack extension is
recommended.
