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268897-UUM-B-1108
Every time the filters are changed the following items should be visually
inspected:
Check combustion air and vent pipe for blockage or leakage.
Check all components
to be sure they are in good condition and
that there are no obvious signs of deterioration.
Check the drain lines to make sure there are no cracks or leaks.
Check for dirt or lint on any surfaces or on components.
Do not try
to clean any of the surfaces or components.
Cleaning of the fur-
nace and its components must be done by a qualified service pro-
fessional.
If, during the inspection
of your furnace,
you find any of the following
conditions:
Excessive amounts of dust and lint on components.
Damaged or deteriorated
components
or surfaces.
Leaks or blockage in the vent pipe passages.
Water on any surface inside or outside of the furnace.
Do not operate the furnace, call a certified dealer / servicing contractor
to check and / or clean your furnace, or for more information if you have
questions about the operation of your furnace.
If all components
appear to be in good operating condition, replace the
front panels. Turn ON the gas and electrical power supplies to the fur-
nace, and set thermostat to the desired temperature.
Air Filters
Dirty filters greatly restrict the flow of air and may cause damage to the
moving
parts of the furnace.
If the filters become clogged
the heat
exchangers
and blower motor could overheat resulting in a potentially
dangerous situation. The filters should be checked every 3 months. On
new construction,
check the filters every week for the first four weeks
and every three weeks after that, especially if the indoor fan is running
continuously. When replacing the filter(s) you must use filters that are
the same size as those recommended
in Table 1. Use the following pro-
cedure to determine the filter size. Never operate your furnace without a
suitable air filter.
1.
Measure the furnace width and use that measurement
to deter-
mine the cabinet width.
•
A 17-1/2" wide cabinet is a "B" cabinet.
•
A 21" wide cabinet is a "C" cabinet.
2.
Locate the cabinet size on Table 1 then determine
whether you
have a bottom or side return air duct using the following method.
a.
If the return air filter is on the left or right side of the furnace it
is a side return
b.
If the air filter is on the bottom of the furnace then you have a
bottom return.
C.
If the air filters are on the bottom and the side of the furnace
then you have a bottom and side return. You must replace
both air filters. Table 1 will indicate 2 filters by using brackets
with the number two (2).
D.
If the air filters are on both sides of the furnace then you have
a two sided return. You must replace both air filters. Table 1
will indicate 2 filters by using brackets with the number two
(2).
3.
After you determine the cabinet size and what return configuration
you have, look up the recommended
filter size from Table 1.
Replacing
Filters
Filters used with this furnace must be installed external to the furnace
casinq
DO NOT attempt to install filters inside the furnace cabinet.
Some installations
may have the air filter in a rack attached to the cas-
ing of the furnace or placed in the return air duct. If the filter location or
replacement
process is not obvious, contact
your installer or service
technician
for assistance.
Replace throw away filter(s) with the same
size new filter(s). Throw away filter(s) may be replaced with cleanable
filter(s) at this time. Cleanable filter(s) may be cleaned as described
in
the manufacturer
instructions
or as described
below
and then re-
installed.
TABLE 1: Filter Sizes
Cabinet Size
Side (in)
Side (mm)
Bottom (in) Bottom (mm)
17-1/2" (B)
16 x 25
406 x 635
16 x 25
406 x 635
21" (C)
16x25
406 x 635
20x25
508 x 635
How to Clean
your
Filter
High-velocity
filters may be cleaned with a vacuum cleaner or washed
with a garden hose. Be sure to shake off excess water and allow filter to
completely dry before re-installing the filter.
Blower
Care
Even with good filters properly in place, blower wheels and motors will
become dust laden after long months of operation.
The entire blower
assembly
should
be inspected annually.
If the motor and wheel are
heavily coated with dust, they can be brushed and cleaned with a vac-
uum cleaner. If the blower cannot be properly cleaned without removing
it from the furnace, then this service must be performed by a qualified
service agency.
kWARNING
Make sure you DO NOT move the clip on weight on the
indoor fan wheel when cleaning the wheel. This weight is
used to balance the wheel. Moving the weight will cause
the fan wheel to vibrate.
Motor Lubrication
The motors in these furnaces are permanently
lubricated,
and do not
require periodic oiling.
Every time the filters are changed the following items should be visually
inspected:
•
Check combustion air and vent pipe for blockage or leakage.
•
Check all components
to be sure they are in good condition and
that there are no obvious signs of deterioration.
•
Check the drain lines to make sure there are no cracks or leaks.
•
Check for dirt or lint on any surfaces or on components.
Do not try
to clean any of the surfaces or components.
Cleaning of the fur-
nace and its components
must be done by a qualified service pro-
fessional.
If, during the inspection
of your furnace,
you find any of the following
conditions:
Excessive amounts of dust and lint on components.
Damaged or deteriorated
components
or surfaces.
Leaks or blockage in the vent pipe passages.
•
Water on any surface inside or outside of the furnace.
Do not operate the furnace, call a certified dealer / servicing contractor
to check and / or clean your furnace, or for more information
if you have
questions about the operation of your furnace.
If all components
appear to be in good operating condition, replace the
front panels. Turn ON the gas and electrical power supplies to the fur-
nace, and set thermostat to the desired temperature.
4
Johnson Controls Unitary Products
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