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Furnace
Maintenance
(Cont.)
Filter
ReplacementlCounterflow
See Figure
5
1. Turn
off
electric
power
for
furnace
at circuit
breaker
ordisconnect
switch.
2.
Remove
blower
compartment
door.
3.
Reach up through
right
side and lift upward
and
swing top of filter towards
center
of furnace
then
purl filter down
and remove
being
careful
not to
dislodge
dirt and debris
from
filter.
4.
Inspect filter
and replace
or clean washable
type.
If filter
is aluminum
mesh
it should
be recoated
with
filter
c0at[ng
spray.
FIG. 5 COUNTERFLOW
FILTER
REPLACEMENT
CONDENSATE
DISPOSAL
MonthlylAnnually
Your furnace
has a condensate
trap as part of the vent
system:
The moisture
in the flue gases will condense
and collect
in the trap to go to an inside
drain
or be
pumped
to a sewer
line using
a condensate
pump.
]:he Condensate
Trap and Condensate
Neutralizer
Car-
tridge
(_{ used) in the drain line leading
from the trap
will require some maintenance.
Disassemble
and clean
trap and cartridge
prior to each heating
season
or if
drain line becomes
plugged.
Inspect the drain fine and overflow
line at least
mon-
thly. If the Condensate
Neutralizer
Cartridge
becomes
plugged
the
condensate
will
flow
through
the
overflow
line. If this happens clean both cartridge
and
trap.
TO CLEAN:
Disconnect
the drain line cartridge
and
unscrew
end cap from cartridge.
Pour the neutralizer
out and thoroughly
flush neutralizer
and inside of car-
tridge with water.
Pour neutralizer
back into cartridge,
adding
neutralizer
if cartridge
is less than
¾ full.
Unscrew
trap from
_/ent Connecting
Tee and flush
throughly
with water,
use soap if necessary
to clean,
DO NOT USE any kind of solvents.
Make
sure
float
is reinstalled
in trap,
Ref. Fig. 7.
Reassemble
and
sea[
threaded
connections
with
silicone
rubber (bathtub
caulk)or
pipe dope approved
for plastic
pipe.
See repair parts section
in the Furnace Technical
Sup-
port Manual,
to order replacement
neutralizer.
Do not use Condensate
for any reason
as it is acidic.
5.
Reinstall felt filter
first.
If filter
is marked
for air
flow
direction
make
sure it's
installed
correctlY,
6,
Replace
blower
compartment
door
making
sure
that
it's tightly
closed.
7.
Turn
on electric
power
for the furnace.
FIG.
6
RECOMMENDED
REMOTE FILTER SIZES
Nominal
Toes
Air
Conditioning
Nominal
Air
Flow
Cubic
Feet
per
Minute
Up Thru
2 Tons
800-900
CFM
2_'%ns
9OO-I
100 CFM
L
3 Tone
1100-1300
CFM
3_'%.s
3300-I_00
CFM
4 Tons
1500-1700
CFM
4_
Tons
1700-1900
CFM
5 Tons
1900-2100
CFM
Recommended
Filter Sizes
Sq, |_¢h Surface AtealNominal
Size
Disposable
Filters
432
20X25
480
20X30
576
14X25(2)
........ 6 72
16X25(2)
768
20×25121
864
20X25{2)
96O
20X30
12i
Cleanable Filzers
26O
15X20
288
14X25
346
t6X25
404
20X25
461
20X25
5_9
2_XZ5
576
24X25
Furnace
Size
1000
X
BTUH
40
50
75
(counter
flow)
(onty]
40
5,0
75
1 on
40
50
75
100
100
125
75
Eupflow
on_y)
125
100
(upf!ow
only)
125
125
10
FURNACE
CONDITION
AND
FLUE
GAS
PASSAGES/Monthly
A properly
adjusted
gas furnace.should
not require
cleaning
at frequent
intervals,
but it should
be in-
spected
regularly
to ensure safe and efficient
opera-
tion. A brief monthly
inspection is recommended
that
does not require disassembly,
in addition
you should
have the furnace
inspected,
and cleaned
if required,
by a qualified
service
technician
annually.
During the monthly
inspection
check the vent pipe and
fresh air intake
(if installed),
to be sure they
are clear
and free of obstructions.
Check vent pipe for evidence
of condensate
leakage, tight joints, secure attachment
to furnace
and sagging
pipe.
Horizontal
sections
of pipe must
slope upward
1/4"
per foot
except
sections
between
furnace
and drain
trap when
trap is not mounted
directly
on furnace.
Any horizontal
section
(max. 4" long) must slope down
a minimum
of 1/4"
per foot to trap. Vertical
sections
to trap can be a maximum
of 5 feet.
Check return
air duct to make sure it is sealed
to fur-
nace casing
and that it is in good physical condition.
It must
terminate
outside
the space
containing
the
furnace
with
no holes or inlets
in furnace
space.
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