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FURNACE
MAINTENANCE
it is recommended
.that
you have
your
furnace
in-
spected
and serviced
on an annual
basis (before
the
heating
season)
by a quaUfied
service
technician.
You
may
perform
maintenance
on
the
furnace
yourself,
but remember
that
certain
mechanical
and
electrical
skills and tools are required
to properly
per-
form
maintenance
on the furnace.
Personal
iniury
or
death may result
if you are not properly
trained.
You
should
call your installing
dealer or place of purchase
if you are uncertain
about
your
ability
to perform
maintenance,
,'
Filter
Replacement
The fitter
will
normaliy
be found
inside the
furnace
blower
compartment,
see pages 5 and 6, but alter-
nate locations
may be a remote
filter
rack
attached
to the outside
of the furnace,
a separate
return
air
cabinet
attached
to furnace
or a remote
filter
grille.
Remote
filter grilles and return air cabinets
wil! usual-
ly have a hinged door or removable
panel
to be able
to remove
filter.
Filter racks
attached
to the furnace
will usually be made so the filter simply
slides out one
side for removal.
Use only the same
size filter.
The
type must be the same unless replacing
a disposable
tow velocity
type,
with a washable
high velocity
type.
AIR
FILTERS
--
Monthly
The air fi!ter(s)
should
be inspected
at least monthly
and cleaned
or replaced
as required.
There
are two
types of filters most commonly
used. The most widely
used is the fiberglass
disposable
type
which
should
be replaced before it becomes
clogged.
The other type
commonly
in use is the washable
type constructed
of
aluminum
mesh, foam, or reinforced
fibers.
Washable
filters
may be cleaned
by soaking
in mild detergent
and rinsing
with
water.
,
NOTE
....
Some filters are marked with an arrow to indicate
the proper direction of air flow through the filter.
"When installing the arrow must point in the direc-
tion of the air flow.
Remember
that dirty fitters
are the
most
common
cause
of inadequate
heating or coo}ing performance.
.
immm
The table
on page 10 lists recommended
sizes and
types
of filters
that
may be used with
your furnace,
based on the input rating and nominal
tons of air con-
ditioning
that
may be used with
the furnace.
However,
the furnace
installer
may have used a larger
filter
for additional
air volume
or if the furnace
was
installed
for Heating
Only with a remote filter cabinet
or central return he may have installed
a smaller filter.
If air conditioning
has been added since your furnace
was
installed,
make
sure the filter
size is adequate.
Replacement
filters
should
be of the same
type and
size to ensure adequate
air flow
and filtering,
unless
a disposable
low
velocity
filter
is replaced
with
a
washable
high velocity
type.
Filter Replacement/Upflow
(Hi-Boy)
See Figure 4
1. Turn
off electric
power
for furnace
at circuit
breaker or disconnect
switch.
.
3.
.
.
6.
7.
FIGURE 4
Remove
blower
compartment
door.
Pull back
on filter
clip and
remove
filter
being
careful
not to dislodge
dirt and debris from
filter.
Inspect filter and replace or clean washable
type.
If filter
is aluminum
mesh
it should
be recoated
wit.h filter coating
spray.
Reinstall filter under clips.
If filter is marked
for air
flow
direction
make
sure it's
insta$1ed correctly.
Replace
blower
compartment
door making
sure
that it's tightly
closed.
Turn
on electric
power
for the furnace.
FILTER REPLACEMENT
?
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