Fire and Unit Operation Hazard

many applications, the installer will provide 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 typical 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 Fig. 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 – Air Filters Located Inside Unit

(For Replacement Purposes)

Unit Size	Filter Size in. (mm)

A24	20x20x1 (508x508x25)

A30	20x24x1 (508x610x25)

A36--- A42	24x30x1 (610x762x25)

A48--- A60	24x36x1 (610x914x25)

To replace or inspect filters in accessory filter rack:

1.Remove the filter access panel (See Fig. 3) using a 5/16-in. nut driver.

2.Remove the filter(s) by pulling it out of the unit. If the filter(s) is dirty, clean or replace with a new one.

When installing the new filter(s), note the direction of the airflow arrows on the filter frame.

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.

RETURN DUCT COVER (Remove for

filter access)

SMALL CHASSIS

A10063

Fig. 4 - Small Chassis Filter Access

Filter Access Panel

For Accessory Filter Rack

Access Panels

A09044

Fig. 3 - Accessory Filter Rack Access Panel

!WARNING

Failure to follow this warning could result in personal injury, death or 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.

FILTER

ACCESS

PANEL

LARGE CHASSIS

A10062

Fig. 5 - Large Chassis Filter Access

Replacing or inspecting filters in units with econom- izers

Small Chassis (See Fig. 4)

1.Remove return air duct cover at rear of unit using a 5/16-in. nut driver.

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 water tight.

Large Chassis (See Fig. 5)

1.Remove filter access door using a 5/16-in. nut driver.

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.

50EZ-A, 50VT-A specifications

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