When installing the new filter(s), note the direction of the airflow arrows on the filter frame, which should be pointing at the indoor coil.
3.Reinstall filter access panel ensuring opening is air and watertight.
If you have difficulty locating your air filter(s) or have questions concerning proper filter maintenance, contact your dealer for instructions. When replacing filters, always use the same size and type of filter that was supplied originally by the installer.
Replacing or inspecting filters in units with economizers
Small Chassis (See Fig. 9)
1.Remove return air duct cover at rear of unit using a
2.Remove the filter(s) by pulling it out and through the unit duct opening. If filter is dirty, replace both filters with new ones.
When installing the new filters, note the direction of the airflow arrows on the filter frame, which should be pointing at the indoor coil.
3. Reinstall duct cover ensuring opening is air and watertight.
Table 2 – Indoor Air Filter Data with Economizer
|
|
|
48EZ Unit Size |
| Filter Size in. (mm) |
| 2 each 20 x 12 x 1 | |
| (508 x 305 x 25) | |
|
| |
| 2 each 20 x 12 x 1 | |
| (508 x 305 x 25) | |
|
| |
| 1 each 24 x 14 x 1 (610 x 356 x 25), | |
| 24 x 16 x 1 (610 x 406 x 25) | |
|
| |
| 1 each 24 x 14 x 1 (610 x 356 x 25), | |
| 24 x 16 x 1 (610 x 406 x 25) | |
|
| |
| 1 each 24 x 16 x 1 (610 x 406 x 25), | |
| 24 x 18 x 1 (610 x 457 x 25) | |
|
| |
*Units with bent indoor | coil. |
|
|
|
|
48VT Unit Size |
| Filter Size in. (mm) |
| 2 each 20 x 12 x 1 | |
| (508 x 305 x 25 mm) | |
|
| |
| 1 each 24 x 14 x 1 (610 x 406 x 25), | |
| 24 x 16 x 1 (610 x 406 x 25) | |
|
| |
| 1 each 24 x 14 x 1 (610 x 356 x 25), | |
| 24 x 16 x 1 (610 x 406 x 25) | |
|
| |
| 1 each 24 x 16 x 1 (610 x 406 x 25), | |
| 24 x 18 x 1 (610 x 457 x 25) | |
|
| |
| 1 each 24 x 16 x 1 (610 x 406 x 25), | |
| 24 x 18 x 1 (610 x 457 x 25) | |
|
| |
*Units with bent indoor | coil. |
|
Large Chassis (See Fig. 10)
1.Remove filter access door using a
2.Remove the filter(s) by pulling it out and through the unit filter access door. If filter is dirty, replace both filters with new ones.
Units with bent indoor coils, install 24 x 18 x 1 (610 x 457 x 25 mm) filter first and then install 24 x 16 x 1 (610 x 406 x 25) filter.
When installing the new filters, note the direction of the airflow arrows on the filter frame, which should be pointing at the indoor coil.
3.Reinstall filter access door ensuring opening is air and watertight.
!CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution may result in property damage.
Never operate your unit without filters in place. An accumulation of dust and lint on internal parts of your unit can cause loss of efficiency and blower motor and/or compressor damage.
RETURN
DUCT COVER 
(Remove for 
filter access)
SMALL CHASSIS
A10063
Fig. 9 - Small Chassis Filter Access
FILTER |
ACCESS |
PANEL |
LARGE CHASSIS
A10062
Fig. 10 - Large Chassis Filter Access
Fans and Fan Motors
Periodically check the condition of fan wheels and housings and fan motor shaft bearings. Contact your dealer for the required annual maintenance.
Indoor and Outdoor Coils
Cleaning of the coils should only be done by qualified service personnel. Contact your dealer for the required annual maintenance.
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