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24-V
WIRING
Make field 24-v
connections
at the 24-v
terminal strip. (See Fig.
25.) Connect
terminal Y as shown
in Fig. 26 for proper
cooling
operation.
Use
only
AWG
No.
18,
color-coded,
copper
thermostat
wire.
The
24-v
circuit
contains
an
automotive-type,
3-amp.
fuse
located
on the
control.
Any
direct
shorts
during
installation,
service,
or maintenance
could
cause
this fuse to blow.
If fuse
replacement
is required,
use ONLY
a 3-amp.
fuse of identical
size.
ACCESSORIES
1. Electronic
Air Cleaner
(EAC)
Connect
an accessory
Electronic
Air Cleaner
(if used) us-
ing l/4-in
female quick
connect
terminals
to the two male
l/4-in
quick-connect
terminals
on
the
control
board
marked
EAC-I
and EAC-2.
The terminals
are rated for
115 VAC,
1.0 amps maximum
and are energized
during
blower
motor operation.
(See Fig. 24.)
2. Humidifier
(HUM)
Connect
an accessory
24 VAC, 0.5 amp. maximum
hu-
midifier
(if used) to the l/4-in
male quick-connect
HUM
terminal
and
COM-24V
screw
terminal
on the
control
board
thermostat
strip.
The HUM
terminal
is energized
when gas valve relay (GVR)
is energized.
(See Fig. 24.)
NOTE:
A field-supplied,
l15-v
controlled
relay connected
to
EAC terminals
may be added if humidifier
operation
is desired
during blower
operation.
NOTE:
DO
NOT
connect
furnace
control
HUM
terminal
to
HUM (humidifier)
terminal
on humidity
sensing
thermostat,
zone
controller
or similar
device.
See humidity
sensing
thermostat,
zone
controller,
thermostat,
or
controller
manufacturer's
instructions
for proper
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 Z223.1-2012/NFPA
54-2012
(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
Z21.47-2012/CSA
2.3-2012
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
iniury or death.
Do
not bypass
the draft
safeguard
switch,
as an unsafe
condition
could exist which must be corrected.
24
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