All G43UF fillers are installed
e)(ternal.
to the unit. Filters
should
be
Inspected monthly. Clean or replace the filters
when necessary to ensure proper furnace operation. Re-
placement filters must be rated for high velocity
alr1low.
Table 1 lists recommended filter sizes.
A
filter
must be in place when Ihe unit is operating.
TABLE 1
Furnace
Filter Size
Cabinet
Width
SIde
Return
Bottom Return
17-1/2"
16
X
25
X 1
(1)
16
X
25
X 1
(1)
21"
16X25X1
(1)
20
X
25
X 1
(1)
24-1/2"
16X25X
1
(2)
24
)(
25
)(
1
(1)
A licensed professional service technician (or eqUivalent)
should inspect the complete system each season (heating
and cooling). The following maintenance procedures
should only
be
conducted by a licensed professional ser-
vice technician (or eqUivalent).
Do
not
attempt
to service
the
unit
in
any
way.
AWARNING
ELECTRICAL SHOCK, FIRE.
OR
EXPLOSION HAZARD.
Annually (before heating season) inspect furnace venting
system, vent cap, heat exchanger, and burners for corro-
sion, deterioration, or deposits
of
debris. Remove any ob-
structions.
Inspect the furnace ror obvious signs
of
deterioration.
Inspect the furnace venting system
to
make sure it
is
in
place, physically sound, and without holes, corrosion. or
blockage.
Vent pipe must
be
clear and free of obstructions and must
slope upward away from the furnace.
Inspect the furnace return air duct connection to ensure
duct
is
sealed to the furnace and terminates outside the
space containing the furnace.
Inspect the physical support
of
the furnace to guarantee
that
It
is sound without sagging, cracks or gaps around
base and it maintains seal between base and support.
Inspect the condensate drain and trap
for
leaks
and
cracks.
The
dr~in
and
trap must also be cleaned and the trap must
be
filled with water.
During a seasonal check the service technician will
con~
duct a combustion analysis. The technician will also in-
spect the indoor blower, burner flames, electrical connec-
tions and the venting system.
810wer
Check the blower wheel for debris
and
clean
if
necessary.
The blower motors are prelubricated for extended bearing
life.
No
further lubrication is needed.
Failure
to
follow
safety warnings eXilctly could result
in
dangerous
operation,
serious
injmy,
death
or
property
damage.
Improper
servicing
could
result
in
dangerous
oper~
tion.
serious
injury.
c1eath,
or
properly
damage.
Before servicing,
disconnect
all electrical
power
to
fUl'I1ace.
When
servicing
controls,
label
<III
wires
prior
to
dis-
connecting. Take cart'
to
reconnect
wires correctly.
Verify
proper
operation
after serVicing.
Venting
System
A WARNING
Asphyxiation
HClzard
The
exhaust
vent
for
this
furnace
must
be Innk·free
and
must
be
securely
connected
to
the furnilce flue
collar
<:It
all times.
For
your
sClfety and
to
ftllfjll
the term::;
of
the limited
warranty, a licensed
professional
service technician
(or
eqUivalent)
Illust
annually
inspect
this
furnace
Jnd
its
vent
system
AWARNING
The
blower
access
panellTlusl
be
securely
in
place
when the
blower
and
burners
are operating.
Gas
fumes.
willet\
could
contam
carbon
monoxide,
can
be
drawn
11110
living space resulting
in
personal
inju-
ry
01
cleCltll
Burner
Flame
A CAUTION
Electrical
1 - Check all wiring for loose connections.
2 - Check for the correct voltage at the furnace (furnace
operating).
3 - Check amp-draw
On
the blower motor.
Motor Nameplate
Actual,
_
Page 5
9
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