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CARBON
MONOXIDE
POISONING
HAZARD
Failure to follow
the steps outlined
below
fbr each appliance
connected
to the venting
system
being
placed
into operation
could result
in carbon
rnonoxide
poisoning
or death
The following
steps
shall
be
fbllowed
for each
appliance
connected
to the venting
system
being
placed
into operation,
while
all other appliances
connected
to the venting
system
are
not in operation:
1. Seal any unused
openings
in venting
system.
2. Inspect
t!-_e venting
system
for proper
size and horizontal
pitch,
as required
in the National
Fuel
Gas Code,
ANSI
Z223A=2002NFPA
54°2002
or the CSA
B149.1,
Natural
Gas and Propane
Installation
(?ode and these instructions.
Determine
that there is no blockage
or restriction,
leakage,
corrosion
and other
deficiencies,
which
could
cause
an
unsafe
condition.
3. As far as practical,
close
all building
doors
and windows
and all doors
between
the space in which
the appliance(s)
connected
to the venting
system
are
located
and
other
spaces
of the building.
4. (?lose fireplace
dampers.
5. Turn on clothes
dryers
and any appliance
not connected
to
the venting
system.
Turn
on any
exhaust
fans,
such
as
range
hoods and bathroom
exhausts,
so they are operating
at maximum
speed. Do not operate
a summer
exhaust
tim.
6 Follow
t!-_etighting
instructions
Ptace the appliance
being
inspected
into operation.
Adjust
the thermostat
so appli=
ance is operating
continuously
7 Test for spillage
flora drak hood equipped
appliances
at the
draft
hood relief
opening
after 5 minutes
of main
burner
operation.
Use the flame
of a match
or candle.
8. If improper
venting
is observed
during
any of the above
tests,
the venting
system
must be con'ected
in accordance
with
the
National
Fuel
Gas
(ode,
ANSI
Z223.1=
2002 NFPA 54-2002
and/or
(SA
B 149.1, Natural
Gas and
Propane
Installation
Code.
9 After it has been deternrined
that each appliance
connected
to
the
venting
system
properly
vents
when
tested
as
outlined
above,
remm
doors,
windows,
exhaust
fans,
fireplace
dampers
and any other gas-fired
appliance
to their
previous
conditions
of use.
Vent
system
or vent connectors
rnay need to be resizcd.
For any
other
appliances
when
resizing
vent
systems
or vent connectors,
system
or connector
must be sized
to approach
mininmm
size as
determined
using
appropriate
table
fbund
in the NFGC
or NSC=
NGPIC.
COMBUSTION=AIR
AND
VENT
PIPING
General
FIRE
AND EXPLOSION
HAZARD
Failure
to %llow
this warning
could
result
in fire, property
damage,
personal
injuw,
or death
Solvent
cements
are
combustible.
Keep
away
fiom
heat,
sparks,
and open
flame.
Use only
in well°ventilated
areas.
Avoid
breathing
in vapor
or allowing
contact
with
skin or
eyes.
( ombustion°air
and vent pipe, fittings,
printers,
and solvents
must
conform
to American
National
Standards
Institute
(ANSI)
stan=
dards
and American
Society
for Testing
and Materials
(ASTM)
28
standards
See Table 7 for approved rnaterials %r use in the U.S.A.
See Table 8 fPr nlaxinmm pipe lengths and Fig 39, 40, and 41 fbr
exterior piping arrangements
In Canada, construct all cornhustion-air and vent pipes [br this unit
of CSA or UL(
listed schedule-40 PVC, PV(-DWV
or ABS=
DWV pipe and pipe cement. SDR pipe is NOT approved
in
Canada
Vent pipe re*ruination must be installed with adequate clearances
to building openings and equipment to comply with national and
tocal codes,
Combustion Air Pipe
UNIT
CORROSION
HAZARD
Excessive
exposure
to contaminated
congt_ustion
air may
result
in safety
and perfbrmance
related
problems.
Combustion
air must not be taken front inside a structme
that
is fi'equently
contaminated
by halogens,
which
include
fluo=
rides,
chlorides,
bromides,
and iodides
These
elements
are
found
in aerosols,
detergents,
bleaches,
cleaning
solvents,
salts,
air fresheners,
adhesives,
paint,
and other
household
products.
Locate
combustion-air
inlet as fbr as possible
fi'om
swimming
pool and swimming
pool pump house
NOTE:
Furnace combustion°air
connections
are sized fPr 2°in.
pipe. The combustion=air
pipe will be 2=in. diameter
in all
installations.
See Table 10 fbr required clearances,
Furnace combustion°air connection must be attached as shown in
Fig 34 Combustion-air
intake housing plug may need to be
relocated in some applications,
Combustion-air pipe must terminate outside of f:urnace casing with
1 elbow Orient elbow so that opening faces down fbr upflow or
downf]ow applications Orient elbow so that it faces sideways (left
or right) for horizontal left or horizontal right applications
(See
Fig 34,) Maintain a 3-in. mininmnt clearance between the opening
of' the comhustion-air
inlet pipe and any object,
NOTE:
All pipe joints must be cemented except attachment of
comhustion-air
inlet pipe to inlet housing connection, since it may
be necessary to remove pipe for servicing.
Install combustion air inlet pipe as fbllows:
1. Assemble combustion-air
inlet pipe.
a. Permanently
install perforated
disk assembly
(factory-
supplied in loose parts bag) in combustion°air elbow using
RTV or by cementing. (See Fig. 35.)
For 120,990 Btuh size unRs only: Separate the 2 halves of
perfPrated disk assembly and use only the shouldered disk
half,
b. Determine length of straight portion of combustion°air inlet
pipe fi'om table in Fig. 35.
c. (ut field°supplied 2-in diameter PVC pipe to detem_ined
length.
d, Permanently
attach
elbowiperfbrated
disk assembly
to
straight portion of' pipe using RTV or by cementing. (See
Fig. 35)
2, Attach con-{bustion-air inlet pipe
a Detem_ine tocation of combustion-air
intake pipe connec°
tion to combustion-air
intake housing as shown in Fig 34
fbr application.
b. Reposition combustion°air
intake housing plug fitting in
appropriate unused intake housing connection.
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