PY4G: Owner’s Information Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
A07797
Fig. 7 – To Shut-off Unit Electric Cooling
Maintenance and Care for the Equipment Owner
Before performing equipment maintenance yourself, please carefully
consider the following:
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 operated. These
filters can be located in one of at least two places. In 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.
Filter kits are available as a purchased accessory. The same filter kit is
included with the accessory economizers and factory installed
economizers.
To replace or inspect filters in accessory filter rack (See
):
1. Remove the filter access panel 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 which should be pointing at the indoor coil.
3. Reinstall filter access panel ensuring opening is air and water tight.
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. See
for filter
sizes supplied with accessory filter rack
.
Replacing or inspecting filters in units with
economizers
)
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 watertight.
Large Chassis (See
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.
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 water tight.
90
STEP 1
STEP 2
CL
O
S
E
STEP 3
OFF
ON
MAIN
WARNING
!
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 performing
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 when handling parts
or reaching into the unit. Wear safety glasses, gloves and
appropriate protective clothing.
Table 1 – Replacement Filter Sizes
Unit Size
Filter Size
24-040/060
2 each 20 x 12 x 1
(508 x 305 x 25 mm)
30-040/060
2 each 20 x 12 x 1
(508 x 305 x 25 mm)
36-060/090
2 each 20 x 12 x 1
(508 x 305 x 25 mm)
42-060/090
1 each 24 x 14 x 1 (610 x 356 x 25 mm),
24 x 16 x 1 (610 x 406 x 25 mm)
48-090/115/130
1 each 24 x 14 x 1 (610 x 356 x 25 mm),
24 x 16 x 1 (610 x 406 x 25 mm)
60-090/115/130
*
*. Units with bent indoor coil.
1 each 24 x 16 x 1 (610 x 406 x 25 mm),
24 x 18 x 1 (610 x 457 x 25 mm)
