Filter
Top Products
4
OPERATING YOUR UNIT
The operation of your unit is controlled by the indoor temperature
control (thermostat). You simply adjust the thermostat and it
maintains the indoor temperature at the level you select. Most
thermostats of heating and cooling systems have 3 controls: a
temperature control selector, a FAN control, and a SYSTEM or
MODE control. Refer to your thermostat owner’s manual for more
information.
To better protect your investment and to eliminate unnecessary
service calls, familiarize yourself with the following facts:
Cooling Mode
With the SYSTEM control set to COOL, your unit will run in
cooling mode until the indoor temperature is lowered to the level
you have selected. On extremely hot days, your unit will run for
longer periods at a time and have shorter “off” periods than on
moderate days.
Gas Heat Mode
With the SYSTEM or MODE control of your indoor thermostat set
to HEAT, your unit will run in heating mode until room
temperature is raised to the level you have selected. On cold days
and nights, your system will typically run for longer periods of
time and have shorter “off” periods than on moderate days.
MAINTENANCE AND SERVICE
This section discusses maintenance that should be performed on
your system. Most maintenance should be performed by your
dealer. You, as the owner, may wish to handle some minor
maintenance for your new unit.
Routine Maintena nce
All routine maintenance should be handled by skilled, exp erienced
personnel. Your dealer can help you establish a standard procedure.
For your safety, keep the unit area clear and free of combustible
materials, gasoline, and other flamm able liquids and vapors.
To assure proper functioning of the unit, flow of condenser air
must not be obs tructed from reaching the un it. Clearance from the
top of the unit is 48 in. (1219 mm). Clearance of at least 36 in.
(914 mm) is required on sides except the power entry side (42 in.
(1067 mm) clearance) and the duct side (12 in. (305 mm)
minimum clearance). Also, ensure that the return--air duct
connection (s) is physically sound, is sealed to the furnace casing,
and terminates outside the space containing the furnace.
Mai ntenance and Care for the Equipm ent Owner
Before performing equipment maintenance yourself, please
carefully consider the following :
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CUT HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
1. Turn off gas supply first, then all electrical power to your
unit and install lock--out tag before servicing or per-
forming maintenance.
2. When removing access panels or performing
maintenance functions inside your unit, be aware of
sharp sheet metal parts and screws. Although special care
is taken to reduce sharp edges to a minimum, be
extremely careful wh en handling parts or reaching into
the unit. Wear safety glasses, gloves, and appropriate
protective clothing.
!
WARNING
Air Filters
The air filter(s) should be checked every 3 or 4 weeks and
changed or cleaned whenever it becomes dirty. Dirty filters
produce excessive stress on the blower motor and can cause the
motor to overheat and shut down.
This unit must have air filters in place before it can be ope rated.
These filters can be located in one of at least two places. In many
applications, the installer will prov ide return air filter grilles
mounted on the wall or ceiling of the conditioned structure. In the
instance of filter grilles, the filters can simply be removed from the
grille and replaced .
The other typi cal application is an accessory filter rack installed
inside the unit itself. The following information is given to assist in
changing filters used in these internal filter racks.
Table 1 indicates the correct indoor filter size for your unit. Refer
to Fi g. 3 to access filters installed in the accessory filter rack. If
using an Accessory Filter Rack, refer to the Installation Instructions
provided with it for correct filter sizes and quantities.
Table 1 – Indoor Air Filter Data
Unit Size Filter Size
A24040 20x20x1 (508x508x25 mm)
A24060, 30 20x24x1 (508x610x25 mm)
A36 --- A42 24x30x1 (610x762x25 mm)
A48 --- A60 24x36x1 (610x914x25 mm)
Burners
Gas Valve
Flue Hood
A09043
Fig. 4 -- Gas Heating/Electric Cooling Unit with Access Panel
Removed
To replace or inspect filters in accessory filter rack (See Fig. 3):
1. Remove the filter access panel using a 5/ 16--in. nut driver.
2. Remov e the filter(s) by pulling it ou t of the unit. If the
filter(s) is dirty , clean or replace with a new one.
When installing the new filter(s), not e the direction of th e airflow
arrows on the filter frame.
If you have difficulty locating your air filter(s) or hav e que stions
concerning proper f ilter maint enance, contact your dealer for
instructions. When replacing filters, always use the same size and
type of filter that was supplied originally by the installer .
UNIT OPERATION HAZARD
Failure to follow thi s cautio n may result in property
damage.
Never operate your unit without filters in place. An
accumulation of du st and lint on internal parts of your unit
can cause loss of efficiency and blower motor and/ or
compressor damage.
!
CAUTION