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2.Humidifier (HUM 24VAC a ndHUM)
a.
HUM 24VAC: Connect anaccessory 24
VAC, 0.5amp maximum h umidifier (ifused) t othe
1/4-in male quick-connect
HUM 24VAC t erminal
and Cscrew terminal onthecontrol board t hermo-
stat s trip. T heHUM 24VAC t erminal isenergized
when t here isa call f orheat ( W) a nd thepressure
switch (PRS) closes. (See Figure 2 4andFigure 4 8).
b.
HUM: Connect anaccessory 115VAC ( EAC
andHUM are1amp maximum c ombined) humidifier
(ifused) tothe]A-inch m ale quick connect HUM
terminal andNEUTRAL ]A-inch q uick connect. The
HUM terminal isenergized when theinducer motor
isenergized (IDR). (See Figure 2 4andFigure 4 8).
NOTE: Afield-supplied, 115-v controlled relay connected to
EACterminals m ay be addedif humidifier operation is
desired d uring blower operation.
NOTE: DONOTconnect furnace control H UM24VAC
terminal to H (humidifier) terminal o n humidity sensing
thermostat, or similardevice.See humiditysensing
thermostat, t hermostat,or controllermanufacturer's
instructions
forproper connection.
VENTING
The furnace
shall
be connected
to a listed factory
built
chimney or vent, or a clay-tile
lined masonry or concrete
chimney.
Venting
into an
unlined
masonry
chimney
or
concrete chimney is prohibited.
When an existing Category I furnace is removed or replaced,
the original venting
system
may no longer
be sized to
properly vent the attached appliances.
An improperly sized
Category
I venting
system
could cause
the formation
of
condensate
in the furnace and vent, leakage of condensate
and
combustion
products,
and
spillage
of
combustion
products into the living space.
Vent system or vent connectors may need to be resized. Vent
systems
or vent connectors,
must be sized to approach
minimum size as determined using appropriate table found in
the NFGC.
GENERAL VENTING REQUIREMENTS
Follow all safety codes for proper vent sizing and installation
requirements,
including
local building
codes, the National
Fuel Gas Code ANSI Z223.1-2009/NFPA
54-2009
(NFGC),
Parts 12 and 13, local building codes, and furnace and vent
manufacturers'
instructions.
CARBON
MONOXIDE
POISONING
HAZARD
Failure to follow the steps outlined
below for each appliance
connected
to the venting
system
being placed
into operation
could result in carbon monoxide
poisoning
or death.
The following
steps
shall
be followed
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
the venting
system
for proper size and horizontal
pitch,
as required
in the
National
Fuel
Gas Code,
ANSI
Z223.1/NFPA
54 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. Close 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
fan.
6. Follow the lighting
instructions.
Place the appliance
being
inspected
into operation.
Adjust
the thermostat
so appliance
is operating
continuously.
7. Test for spillage from draft 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 corrected
in accordance
with the National Fuel Gas Code, ANSI Z223.1/NFPA
54.
9.
After
it
has
been
determined
that
each
appliance
connected
to the venting
system
properly
vents when tested
as outlined
above,
return
doors,
windows,
exhaust
fans,
fireplace
dampers
and any other gas-fired
burning appliance
to their previous
conditions
of use.
These
furnaces
are design-certified
as Category
I furnaces
in
accordance
with
ANSI
Z21.47-2009/CSA
2.3-2009
and
operate
with
a non-positive
vent static
pressure
to minimize
the
potential
for
vent
gas
leakage.
Category
I furnaces
operate
with a flue
loss not less than
17 percent
to minimize
the potential
for condensation
in the venting
system.
These
furnaces
are approved
for
common
venting
and
multistory
venting
with
other
fan
assisted
or
draft
hood
equipped
appliances
in accordance
with
the NFGC,
the local
building
codes,
and furnace
and vent manufacturers'
instructions.
The following
information
and warning
must be considered
in
addition
to the requirements
defined
in the NFGC.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury
or death.
Do not bypass the draft safeguard
switch, as an unsafe
condition cou d exist which must be corrected.
1. If a vent (common or dedicated) becomes blocked, the
furnace will be shut off by the draft safeguard
switch
located on the vent elbow.
2. Do not connect this Category
I furnace into a single-
wall dedicated or common vent. The dedicated or com-
mon vent is considered to be the vertical portion of the
vent system that terminates outdoors.
3. Vent connectors
serving Category
I furnaces shall not
be connected
into any portion of a mechanical
draft
system operating under positive pressure.
441 01 1402 02
23
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