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Factory−Built Chimney
Figure 5
Condensate
Drain
Barometric Draft
Control*
(in either location)
Factory−
Built
Chimney
*Barometric draft control may be installed in either vertical or hor-
izontal section of flue pipe no less than 12" and no more than 18"
from furnace flue outlet.
Masonry Chimne
y
Barometric
Draft
Control*
(in either
location)
Clean Out
Liner
Masonry
Chimney
Figure 6
*Barometric draft control may be installed in either vertical or hor-
izontal section of flue pipe no less than 12" and no more than 18"
from furnace flue outlet.
13 − The vent pipe shall not be connected to a chimney
vent serving a solid fuel appliance or any mechanical
draft system.
14 − All unused chimney openings should be closed.
15 − All vent pipe run through unconditioned areas or out-
side shall be constructed of factory−built chimney sec-
tions. See figure 5.
16 − Where condensation of vent gas is apparent, the vent
should be repaired or replaced. Accumulation of con-
densation in the vent is unacceptable.
17 − Vent connectors serving this appliance shall not be
connected into any portion of mechanical draft sys-
tems operating under positive pressure.
18 − Keep the area around the vent terminal free of snow,
ice and debris.
NOTE − If vent pipe needs to exit from side of cabinet,
use the pilot hole (located on either side of the unit) to
cut a 6" (152 mm) round hole. Attach finishing plate
(provided) with four sheet metal screws to cover rough
edges.
Removal of Unit from Common Venting System
In the event that an existing furnace is removed from a
venting system commonly run with separate appliances,
the venting system is likely to be too large to properly vent
the remaining attached appliances. The following test
should be conducted while each appliance is in operation
and the other appliances not in operation remain con-
nected to the common venting system. If venting system
has been installed improperly, the system must be cor-
rected as outlined in the previous section.
1 − Seal any unused openings in the common venting
system.
2 − Visually inspect venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion or other deficiencies
which could cause an unsafe condition.
3 − Insofar as is practical, close all building doors and win-
dows and all doors between the space in which the ap-
pliances remaining connected to the common venting
system are located and other spaces of the building.
Turn on clothes dryers and any appliances not con-
nected to the common venting system. Turn on any
exhaust fans, such as range hoods and bathroom ex-
hausts, so they will operate at maximum speed. Do
not operate a summer exhaust fan. Close fireplace
dampers.
4 − Following the lighting instruction on the unit, place the
appliance being inspected in operation. Adjust ther-
mostat so appliance will operate continuously.
5 − Test for spillage using a draft gauge.
6 − After it has been determined that each appliance re-
maining connected to the common venting system
properly vents when tested as outlined above, return
doors, windows, exhaust fans, fireplace dampers and
any other fuel burning appliance to its previous condi-
tion of use.
7 − If improper venting is observed during any of the
above tests, the common venting system must be cor-
rected.
Flue Connections
IMPORTANT
When flue pipe is installed at less than minimum
clearance listed in table 2, radiation shields must be
installed. See figure 6.
Use 24 gauge or heavier galvanized smoke pipe and fit-
tings to connect the furnace to the vent. Connect flue pipe
to chimney using the least number of elbows and angles
possible. Flue pipe or vent connector must be inserted into
but not beyond the inside surface of the chimney flue. No
reduction in diameter of flue pipe is acceptable. It is best to
